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configmaps - pandas.awesome.bears.example providers: - aescbc: keys: - name: key1 secret: c2VjcmV0IGlzIHNlY3VyZQ== - resources: - '*.apps' providers: - aescbc: keys: - name: key2 secret: c2VjcmV0IGlzIHNlY3VyZSwgb3IgaXMgaXQ/Cg== - resources: - '*.*' providers: - aescbc: keys: - name: key3 secret: c2VjcmV0IGlzIHNlY3VyZSwgSSB0aGluaw== ``` | Field | Description | | --- | --- | | `apiVersion` string | `apiserver.config.k8s.io/v1` | | `kind` string | `EncryptionConfiguration` | | `resources` **[Required]** [`[]ResourceConfiguration`](#apiserver-config-k8s-io-v1-ResourceConfiguration) | resources is a list containing resources, and their corresponding encryption providers. | ## `TracingConfiguration` {#apiserver-config-k8s-io-v1-TracingConfiguration} TracingConfiguration provides versioned configuration for tracing clients. | Field | Description | | --- | --- | | `apiVersion` string | `apiserver.config.k8s.io/v1` | | `kind` string | `TracingConfiguration` | | `TracingConfiguration` **[Required]** [`TracingConfiguration`](#TracingConfiguration) | (Members of `TracingConfiguration` are embedded into this type.) Embed the component config tracing configuration struct | ## `AESConfiguration` {#apiserver-config-k8s-io-v1-AESConfiguration} \*\*Appears in:\*\* - [ProviderConfiguration](#apiserver-config-k8s-io-v1-ProviderConfiguration) AESConfiguration contains the API configuration for an AES transformer. | Field | Description | | --- | --- | | `keys` **[Required]** [`[]Key`](#apiserver-config-k8s-io-v1-Key) | keys is a list of keys to be used for creating the AES transformer. Each key has to be 32 bytes long for AES-CBC and 16, 24 or 32 bytes for AES-GCM. | ## `AdmissionPluginConfiguration` {#apiserver-config-k8s-io-v1-AdmissionPluginConfiguration} \*\*Appears in:\*\* - [AdmissionConfiguration](#apiserver-config-k8s-io-v1-AdmissionConfiguration) AdmissionPluginConfiguration provides the configuration for a single plug-in. | Field | Description | | --- | --- | | `name` **[Required]** `string` | Name is the name of the admission controller. It must match the registered admission plugin name. | | `path` `string` | Path is the path to a configuration file that contains the plugin's configuration | | `configuration` [`k8s.io/apimachinery/pkg/runtime.Unknown`](https://pkg.go.dev/k8s.io/apimachinery/pkg/runtime#Unknown) | Configuration is an embedded configuration object to be used as the plugin's configuration. If present, it will be used instead of the path to the configuration file. | ## `AnonymousAuthCondition` {#apiserver-config-k8s-io-v1-AnonymousAuthCondition} \*\*Appears in:\*\* - [AnonymousAuthConfig](#apiserver-config-k8s-io-v1-AnonymousAuthConfig) AnonymousAuthCondition describes the condition under which anonymous auth should be enabled. | Field | Description | | --- | --- | | `path` **[Required]** `string` | Path for which anonymous auth is enabled. | ## `AnonymousAuthConfig` {#apiserver-config-k8s-io-v1-AnonymousAuthConfig} \*\*Appears in:\*\* - [AuthenticationConfiguration](#apiserver-config-k8s-io-v1-AuthenticationConfiguration) AnonymousAuthConfig provides the configuration for the anonymous authenticator. | Field | Description | | --- | --- | | `enabled` **[Required]** `bool` | No description provided. | | `conditions` **[Required]** [`[]AnonymousAuthCondition`](#apiserver-config-k8s-io-v1-AnonymousAuthCondition) | If set, anonymous auth is only allowed if the request meets one of the conditions. | ## `AudienceMatchPolicyType` {#apiserver-config-k8s-io-v1-AudienceMatchPolicyType} (Alias of `string`) \*\*Appears in:\*\* - [Issuer](#apiserver-config-k8s-io-v1-Issuer) AudienceMatchPolicyType is a set of valid values for issuer.audienceMatchPolicy ## `AuthorizerConfiguration` {#apiserver-config-k8s-io-v1-AuthorizerConfiguration} \*\*Appears in:\*\* - [AuthorizationConfiguration](#apiserver-config-k8s-io-v1-AuthorizationConfiguration) | Field | Description | | --- | --- | | `type` **[Required]** `string` | Type refers to the type of the authorizer "Webhook" is supported in the generic API server Other API servers may support additional authorizer types like Node, RBAC, ABAC, etc. | | `name` **[Required]** `string` | Name used to describe the webhook This is explicitly used in monitoring machinery for metrics Note: Names must be DNS1123 labels like `myauthorizername` or subdomains like `myauthorizer.example.domain` Required, with no default | | `webhook` **[Required]** [`WebhookConfiguration`](#apiserver-config-k8s-io-v1-WebhookConfiguration) | Webhook defines the configuration for a Webhook authorizer Must be defined when Type=Webhook Must not be defined when Type!=Webhook | ## `ClaimMappings` {#apiserver-config-k8s-io-v1-ClaimMappings} \*\*Appears in:\*\* - [JWTAuthenticator](#apiserver-config-k8s-io-v1-JWTAuthenticator) ClaimMappings provides the configuration for claim mapping | Field | Description | | --- | --- | | `username` **[Required]** [`PrefixedClaimOrExpression`](#apiserver-config-k8s-io-v1-PrefixedClaimOrExpression) | username represents an option for the username attribute. The claim's value must be a singular string. Same as the --oidc-username-claim and --oidc-username-prefix flags. If username.expression is set, the expression must produce a string value. If username.expression uses 'claims.email', then 'claims.email\_verified' must be used in username.expression or extra[*].valueExpression or claimValidationRules[*].expression. An
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/apiserver-config.v1.md
main
kubernetes
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username represents an option for the username attribute. The claim's value must be a singular string. Same as the --oidc-username-claim and --oidc-username-prefix flags. If username.expression is set, the expression must produce a string value. If username.expression uses 'claims.email', then 'claims.email\_verified' must be used in username.expression or extra[*].valueExpression or claimValidationRules[*].expression. An example claim validation rule expression that matches the validation automatically applied when username.claim is set to 'email' is 'claims.?email\_verified.orValue(true) == true'. By explicitly comparing the value to true, we let type-checking see the result will be a boolean, and to make sure a non-boolean email\_verified claim will be caught at runtime. In the flag based approach, the --oidc-username-claim and --oidc-username-prefix are optional. If --oidc-username-claim is not set, the default value is "sub". For the authentication config, there is no defaulting for claim or prefix. The claim and prefix must be set explicitly. For claim, if --oidc-username-claim was not set with legacy flag approach, configure username.claim="sub" in the authentication config. For prefix: (1) --oidc-username-prefix="-", no prefix was added to the username. For the same behavior using authentication config, set username.prefix="" (2) --oidc-username-prefix="" and --oidc-username-claim != "email", prefix was "<value of --oidc-issuer-url>#". For the same behavior using authentication config, set username.prefix="#" (3) --oidc-username-prefix="". For the same behavior using authentication config, set username.prefix="" | | `groups` [`PrefixedClaimOrExpression`](#apiserver-config-k8s-io-v1-PrefixedClaimOrExpression) | groups represents an option for the groups attribute. The claim's value must be a string or string array claim. If groups.claim is set, the prefix must be specified (and can be the empty string). If groups.expression is set, the expression must produce a string or string array value. "", [], and null values are treated as the group mapping not being present. | | `uid` [`ClaimOrExpression`](#apiserver-config-k8s-io-v1-ClaimOrExpression) | uid represents an option for the uid attribute. Claim must be a singular string claim. If uid.expression is set, the expression must produce a string value. | | `extra` [`[]ExtraMapping`](#apiserver-config-k8s-io-v1-ExtraMapping) | extra represents an option for the extra attribute. expression must produce a string or string array value. If the value is empty, the extra mapping will not be present. hard-coded extra key/value * key: "foo" valueExpression: "'bar'" This will result in an extra attribute - foo: ["bar"] hard-coded key, value copying claim value * key: "foo" valueExpression: "claims.some\_claim" This will result in an extra attribute - foo: [value of some\_claim] hard-coded key, value derived from claim value * key: "admin" valueExpression: '(has(claims.is\_admin) && claims.is\_admin) ? "true":""' This will result in: * if is\_admin claim is present and true, extra attribute - admin: ["true"] * if is\_admin claim is present and false or is\_admin claim is not present, no extra attribute will be added | ## `ClaimOrExpression` {#apiserver-config-k8s-io-v1-ClaimOrExpression} \*\*Appears in:\*\* - [ClaimMappings](#apiserver-config-k8s-io-v1-ClaimMappings) ClaimOrExpression provides the configuration for a single claim or expression. | Field | Description | | --- | --- | | `claim` `string` | claim is the JWT claim to use. Either claim or expression must be set. Mutually exclusive with expression. | | `expression` `string` | expression represents the expression which will be evaluated by CEL. CEL expressions have access to the contents of the token claims, organized into CEL variable: * 'claims' is a map of claim names to claim values. For example, a variable named 'sub' can be accessed as 'claims.sub'. Nested claims can be accessed using dot notation, e.g. 'claims.foo.bar'. Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/ Mutually exclusive with claim. | ## `ClaimValidationRule` {#apiserver-config-k8s-io-v1-ClaimValidationRule} \*\*Appears in:\*\* - [JWTAuthenticator](#apiserver-config-k8s-io-v1-JWTAuthenticator) ClaimValidationRule provides the configuration for a single claim validation rule. | Field | Description | | --- | --- | | `claim` `string` | claim is the name of a required claim. Same as --oidc-required-claim flag.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/apiserver-config.v1.md
main
kubernetes
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CEL: https://kubernetes.io/docs/reference/using-api/cel/ Mutually exclusive with claim. | ## `ClaimValidationRule` {#apiserver-config-k8s-io-v1-ClaimValidationRule} \*\*Appears in:\*\* - [JWTAuthenticator](#apiserver-config-k8s-io-v1-JWTAuthenticator) ClaimValidationRule provides the configuration for a single claim validation rule. | Field | Description | | --- | --- | | `claim` `string` | claim is the name of a required claim. Same as --oidc-required-claim flag. Only string claim keys are supported. Mutually exclusive with expression and message. | | `requiredValue` `string` | requiredValue is the value of a required claim. Same as --oidc-required-claim flag. Only string claim values are supported. If claim is set and requiredValue is not set, the claim must be present with a value set to the empty string. Mutually exclusive with expression and message. | | `expression` `string` | expression represents the expression which will be evaluated by CEL. Must produce a boolean. CEL expressions have access to the contents of the token claims, organized into CEL variable: * 'claims' is a map of claim names to claim values. For example, a variable named 'sub' can be accessed as 'claims.sub'. Nested claims can be accessed using dot notation, e.g. 'claims.foo.bar'. Must return true for the validation to pass. Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/ Mutually exclusive with claim and requiredValue. | | `message` `string` | message customizes the returned error message when expression returns false. message is a literal string. Mutually exclusive with claim and requiredValue. | ## `EgressSelectorType` {#apiserver-config-k8s-io-v1-EgressSelectorType} (Alias of `string`) \*\*Appears in:\*\* - [Issuer](#apiserver-config-k8s-io-v1-Issuer) EgressSelectorType is an indicator of which egress selection should be used for sending traffic. ## `ExtraMapping` {#apiserver-config-k8s-io-v1-ExtraMapping} \*\*Appears in:\*\* - [ClaimMappings](#apiserver-config-k8s-io-v1-ClaimMappings) ExtraMapping provides the configuration for a single extra mapping. | Field | Description | | --- | --- | | `key` **[Required]** `string` | key is a string to use as the extra attribute key. key must be a domain-prefix path (e.g. example.org/foo). All characters before the first "/" must be a valid subdomain as defined by RFC 1123. All characters trailing the first "/" must be valid HTTP Path characters as defined by RFC 3986. key must be lowercase. Required to be unique. | | `valueExpression` **[Required]** `string` | valueExpression is a CEL expression to extract extra attribute value. valueExpression must produce a string or string array value. "", [], and null values are treated as the extra mapping not being present. Empty string values contained within a string array are filtered out. CEL expressions have access to the contents of the token claims, organized into CEL variable: * 'claims' is a map of claim names to claim values. For example, a variable named 'sub' can be accessed as 'claims.sub'. Nested claims can be accessed using dot notation, e.g. 'claims.foo.bar'. Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/ | ## `IdentityConfiguration` {#apiserver-config-k8s-io-v1-IdentityConfiguration} \*\*Appears in:\*\* - [ProviderConfiguration](#apiserver-config-k8s-io-v1-ProviderConfiguration) IdentityConfiguration is an empty struct to allow identity transformer in provider configuration. ## `Issuer` {#apiserver-config-k8s-io-v1-Issuer} \*\*Appears in:\*\* - [JWTAuthenticator](#apiserver-config-k8s-io-v1-JWTAuthenticator) Issuer provides the configuration for an external provider's specific settings. | Field | Description | | --- | --- | | `url` **[Required]** `string` | url points to the issuer URL in a format https://url or https://url/path. This must match the "iss" claim in the presented JWT, and the issuer returned from discovery. Same value as the --oidc-issuer-url flag. Discovery information is fetched from "{url}/.well-known/openid-configuration" unless overridden by discoveryURL. Required to be unique across all JWT authenticators. Note that egress selection configuration is not used for this network connection. | | `discoveryURL` `string` | discoveryURL, if specified, overrides the URL used to fetch discovery information instead of using "{url}/.well-known/openid-configuration". The exact value specified is used, so "/.well-known/openid-configuration" must be included in discoveryURL if needed. The "issuer" field in the fetched discovery information must
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/apiserver-config.v1.md
main
kubernetes
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0.126984
not used for this network connection. | | `discoveryURL` `string` | discoveryURL, if specified, overrides the URL used to fetch discovery information instead of using "{url}/.well-known/openid-configuration". The exact value specified is used, so "/.well-known/openid-configuration" must be included in discoveryURL if needed. The "issuer" field in the fetched discovery information must match the "issuer.url" field in the AuthenticationConfiguration and will be used to validate the "iss" claim in the presented JWT. This is for scenarios where the well-known and jwks endpoints are hosted at a different location than the issuer (such as locally in the cluster). Example: A discovery url that is exposed using kubernetes service 'oidc' in namespace 'oidc-namespace' and discovery information is available at '/.well-known/openid-configuration'. discoveryURL: "https://oidc.oidc-namespace/.well-known/openid-configuration" certificateAuthority is used to verify the TLS connection and the hostname on the leaf certificate must be set to 'oidc.oidc-namespace'. curl https://oidc.oidc-namespace/.well-known/openid-configuration (.discoveryURL field) { issuer: "https://oidc.example.com" (.url field) } discoveryURL must be different from url. Required to be unique across all JWT authenticators. Note that egress selection configuration is not used for this network connection. | | `certificateAuthority` `string` | certificateAuthority contains PEM-encoded certificate authority certificates used to validate the connection when fetching discovery information. If unset, the system verifier is used. Same value as the content of the file referenced by the --oidc-ca-file flag. | | `audiences` **[Required]** `[]string` | audiences is the set of acceptable audiences the JWT must be issued to. At least one of the entries must match the "aud" claim in presented JWTs. Same value as the --oidc-client-id flag (though this field supports an array). Required to be non-empty. | | `audienceMatchPolicy` [`AudienceMatchPolicyType`](#apiserver-config-k8s-io-v1-AudienceMatchPolicyType) | audienceMatchPolicy defines how the "audiences" field is used to match the "aud" claim in the presented JWT. Allowed values are: 1. "MatchAny" when multiple audiences are specified and 2. empty (or unset) or "MatchAny" when a single audience is specified. * MatchAny: the "aud" claim in the presented JWT must match at least one of the entries in the "audiences" field. For example, if "audiences" is ["foo", "bar"], the "aud" claim in the presented JWT must contain either "foo" or "bar" (and may contain both). * "": The match policy can be empty (or unset) when a single audience is specified in the "audiences" field. The "aud" claim in the presented JWT must contain the single audience (and may contain others). For more nuanced audience validation, use claimValidationRules. example: claimValidationRule[].expression: 'sets.equivalent(claims.aud, ["bar", "foo", "baz"])' to require an exact match. | | `egressSelectorType` [`EgressSelectorType`](#apiserver-config-k8s-io-v1-EgressSelectorType) | egressSelectorType is an indicator of which egress selection should be used for sending all traffic related to this issuer (discovery, JWKS, distributed claims, etc). If unspecified, no custom dialer is used. When specified, the valid choices are "controlplane" and "cluster". These correspond to the associated values in the --egress-selector-config-file. * controlplane: for traffic intended to go to the control plane. * cluster: for traffic intended to go to the system being managed by Kubernetes. | ## `JWTAuthenticator` {#apiserver-config-k8s-io-v1-JWTAuthenticator} \*\*Appears in:\*\* - [AuthenticationConfiguration](#apiserver-config-k8s-io-v1-AuthenticationConfiguration) JWTAuthenticator provides the configuration for a single JWT authenticator. | Field | Description | | --- | --- | | `issuer` **[Required]** [`Issuer`](#apiserver-config-k8s-io-v1-Issuer) | issuer contains the basic OIDC provider connection options. | | `claimValidationRules` [`[]ClaimValidationRule`](#apiserver-config-k8s-io-v1-ClaimValidationRule) | claimValidationRules are rules that are applied to validate token claims to authenticate users. | | `claimMappings` **[Required]** [`ClaimMappings`](#apiserver-config-k8s-io-v1-ClaimMappings) | claimMappings points claims of a token to be treated as user attributes. | | `userValidationRules` [`[]UserValidationRule`](#apiserver-config-k8s-io-v1-UserValidationRule) | userValidationRules are rules that are applied to final user before completing authentication. These allow invariants to be applied to incoming identities such as preventing the use of the system: prefix that is commonly
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/apiserver-config.v1.md
main
kubernetes
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0.115587
claimMappings points claims of a token to be treated as user attributes. | | `userValidationRules` [`[]UserValidationRule`](#apiserver-config-k8s-io-v1-UserValidationRule) | userValidationRules are rules that are applied to final user before completing authentication. These allow invariants to be applied to incoming identities such as preventing the use of the system: prefix that is commonly used by Kubernetes components. The validation rules are logically ANDed together and must all return true for the validation to pass. | ## `KMSConfiguration` {#apiserver-config-k8s-io-v1-KMSConfiguration} \*\*Appears in:\*\* - [ProviderConfiguration](#apiserver-config-k8s-io-v1-ProviderConfiguration) KMSConfiguration contains the name, cache size and path to configuration file for a KMS based envelope transformer. | Field | Description | | --- | --- | | `apiVersion` `string` | apiVersion of KeyManagementService | | `name` **[Required]** `string` | name is the name of the KMS plugin to be used. | | `cachesize` `int32` | cachesize is the maximum number of secrets which are cached in memory. The default value is 1000. Set to a negative value to disable caching. This field is only allowed for KMS v1 providers. | | `endpoint` **[Required]** `string` | endpoint is the gRPC server listening address, for example "unix:///var/run/kms-provider.sock". | | `timeout` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | timeout for gRPC calls to kms-plugin (ex. 5s). The default is 3 seconds. | ## `Key` {#apiserver-config-k8s-io-v1-Key} \*\*Appears in:\*\* - [AESConfiguration](#apiserver-config-k8s-io-v1-AESConfiguration) - [SecretboxConfiguration](#apiserver-config-k8s-io-v1-SecretboxConfiguration) Key contains name and secret of the provided key for a transformer. | Field | Description | | --- | --- | | `name` **[Required]** `string` | name is the name of the key to be used while storing data to disk. | | `secret` **[Required]** `string` | secret is the actual key, encoded in base64. | ## `PrefixedClaimOrExpression` {#apiserver-config-k8s-io-v1-PrefixedClaimOrExpression} \*\*Appears in:\*\* - [ClaimMappings](#apiserver-config-k8s-io-v1-ClaimMappings) PrefixedClaimOrExpression provides the configuration for a single prefixed claim or expression. | Field | Description | | --- | --- | | `claim` `string` | claim is the JWT claim to use. Mutually exclusive with expression. | | `prefix` `string` | prefix is prepended to claim's value to prevent clashes with existing names. prefix needs to be set if claim is set and can be the empty string. Mutually exclusive with expression. | | `expression` `string` | expression represents the expression which will be evaluated by CEL. CEL expressions have access to the contents of the token claims, organized into CEL variable: * 'claims' is a map of claim names to claim values. For example, a variable named 'sub' can be accessed as 'claims.sub'. Nested claims can be accessed using dot notation, e.g. 'claims.foo.bar'. Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/ Mutually exclusive with claim and prefix. | ## `ProviderConfiguration` {#apiserver-config-k8s-io-v1-ProviderConfiguration} \*\*Appears in:\*\* - [ResourceConfiguration](#apiserver-config-k8s-io-v1-ResourceConfiguration) ProviderConfiguration stores the provided configuration for an encryption provider. | Field | Description | | --- | --- | | `aesgcm` **[Required]** [`AESConfiguration`](#apiserver-config-k8s-io-v1-AESConfiguration) | aesgcm is the configuration for the AES-GCM transformer. | | `aescbc` **[Required]** [`AESConfiguration`](#apiserver-config-k8s-io-v1-AESConfiguration) | aescbc is the configuration for the AES-CBC transformer. | | `secretbox` **[Required]** [`SecretboxConfiguration`](#apiserver-config-k8s-io-v1-SecretboxConfiguration) | secretbox is the configuration for the Secretbox based transformer. | | `identity` **[Required]** [`IdentityConfiguration`](#apiserver-config-k8s-io-v1-IdentityConfiguration) | identity is the (empty) configuration for the identity transformer. | | `kms` **[Required]** [`KMSConfiguration`](#apiserver-config-k8s-io-v1-KMSConfiguration) | kms contains the name, cache size and path to configuration file for a KMS based envelope transformer. | ## `ResourceConfiguration` {#apiserver-config-k8s-io-v1-ResourceConfiguration} \*\*Appears in:\*\* - [EncryptionConfiguration](#apiserver-config-k8s-io-v1-EncryptionConfiguration) ResourceConfiguration stores per resource configuration. | Field | Description | | --- | --- | | `resources` **[Required]** `[]string` | resources is a list of kubernetes resources which have to be encrypted. The resource names are derived from `resource` or `resource.group` of the group/version/resource. eg: pandas.awesome.bears.example is a custom resource with 'group': awesome.bears.example, 'resource': pandas. Use '*.*' to encrypt all resources and '*.' to
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/apiserver-config.v1.md
main
kubernetes
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0.121419
| | `resources` **[Required]** `[]string` | resources is a list of kubernetes resources which have to be encrypted. The resource names are derived from `resource` or `resource.group` of the group/version/resource. eg: pandas.awesome.bears.example is a custom resource with 'group': awesome.bears.example, 'resource': pandas. Use '*.*' to encrypt all resources and '*.' to encrypt all resources in a specific group. eg: '*.awesome.bears.example' will encrypt all resources in the group 'awesome.bears.example'. eg: '\*.' will encrypt all resources in the core group (such as pods, configmaps, etc). | | `providers` **[Required]** [`[]ProviderConfiguration`](#apiserver-config-k8s-io-v1-ProviderConfiguration) | providers is a list of transformers to be used for reading and writing the resources to disk. eg: aesgcm, aescbc, secretbox, identity, kms. | ## `SecretboxConfiguration` {#apiserver-config-k8s-io-v1-SecretboxConfiguration} \*\*Appears in:\*\* - [ProviderConfiguration](#apiserver-config-k8s-io-v1-ProviderConfiguration) SecretboxConfiguration contains the API configuration for an Secretbox transformer. | Field | Description | | --- | --- | | `keys` **[Required]** [`[]Key`](#apiserver-config-k8s-io-v1-Key) | keys is a list of keys to be used for creating the Secretbox transformer. Each key has to be 32 bytes long. | ## `UserValidationRule` {#apiserver-config-k8s-io-v1-UserValidationRule} \*\*Appears in:\*\* - [JWTAuthenticator](#apiserver-config-k8s-io-v1-JWTAuthenticator) UserValidationRule provides the configuration for a single user info validation rule. | Field | Description | | --- | --- | | `expression` **[Required]** `string` | expression represents the expression which will be evaluated by CEL. Must return true for the validation to pass. CEL expressions have access to the contents of UserInfo, organized into CEL variable: * 'user' - authentication.k8s.io/v1, Kind=UserInfo object Refer to https://github.com/kubernetes/api/blob/release-1.28/authentication/v1/types.go#L105-L122 for the definition. API documentation: https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.28/#userinfo-v1-authentication-k8s-io Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/ | | `message` `string` | message customizes the returned error message when rule returns false. message is a literal string. | ## `WebhookConfiguration` {#apiserver-config-k8s-io-v1-WebhookConfiguration} \*\*Appears in:\*\* - [AuthorizerConfiguration](#apiserver-config-k8s-io-v1-AuthorizerConfiguration) | Field | Description | | --- | --- | | `authorizedTTL` **[Required]** [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | The duration to cache 'authorized' responses from the webhook authorizer. Same as setting `--authorization-webhook-cache-authorized-ttl` flag Default: 5m0s | | `cacheAuthorizedRequests` `bool` | CacheAuthorizedRequests specifies whether authorized requests should be cached. If set to true, the TTL for cached decisions can be configured via the AuthorizedTTL field. Default: true | | `unauthorizedTTL` **[Required]** [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | The duration to cache 'unauthorized' responses from the webhook authorizer. Same as setting `--authorization-webhook-cache-unauthorized-ttl` flag Default: 30s | | `cacheUnauthorizedRequests` `bool` | CacheUnauthorizedRequests specifies whether unauthorized requests should be cached. If set to true, the TTL for cached decisions can be configured via the UnauthorizedTTL field. Default: true | | `timeout` **[Required]** [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | Timeout for the webhook request Maximum allowed value is 30s. Required, no default value. | | `subjectAccessReviewVersion` **[Required]** `string` | The API version of the authorization.k8s.io SubjectAccessReview to send to and expect from the webhook. Same as setting `--authorization-webhook-version` flag Valid values: v1beta1, v1 Required, no default value | | `matchConditionSubjectAccessReviewVersion` **[Required]** `string` | MatchConditionSubjectAccessReviewVersion specifies the SubjectAccessReview version the CEL expressions are evaluated against Valid values: v1 Required, no default value | | `failurePolicy` **[Required]** `string` | Controls the authorization decision when a webhook request fails to complete or returns a malformed response or errors evaluating matchConditions. Valid values: * NoOpinion: continue to subsequent authorizers to see if one of them allows the request * Deny: reject the request without consulting subsequent authorizers Required, with no default. | | `connectionInfo` **[Required]** [`WebhookConnectionInfo`](#apiserver-config-k8s-io-v1-WebhookConnectionInfo) | ConnectionInfo defines how we talk to the webhook | | `matchConditions` **[Required]** [`[]WebhookMatchCondition`](#apiserver-config-k8s-io-v1-WebhookMatchCondition) | matchConditions is a list of conditions that must be met for a request to be sent to this webhook. An empty list of matchConditions matches all requests. There are a maximum of 64 match conditions allowed. The exact matching logic is (in order): 1. If at least one matchCondition evaluates to FALSE,
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/apiserver-config.v1.md
main
kubernetes
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0.123336
a list of conditions that must be met for a request to be sent to this webhook. An empty list of matchConditions matches all requests. There are a maximum of 64 match conditions allowed. The exact matching logic is (in order): 1. If at least one matchCondition evaluates to FALSE, then the webhook is skipped. 2. If ALL matchConditions evaluate to TRUE, then the webhook is called. 3. If at least one matchCondition evaluates to an error (but none are FALSE): * If failurePolicy=Deny, then the webhook rejects the request * If failurePolicy=NoOpinion, then the error is ignored and the webhook is skipped | ## `WebhookConnectionInfo` {#apiserver-config-k8s-io-v1-WebhookConnectionInfo} \*\*Appears in:\*\* - [WebhookConfiguration](#apiserver-config-k8s-io-v1-WebhookConfiguration) | Field | Description | | --- | --- | | `type` **[Required]** `string` | Controls how the webhook should communicate with the server. Valid values: * KubeConfigFile: use the file specified in kubeConfigFile to locate the server. * InClusterConfig: use the in-cluster configuration to call the SubjectAccessReview API hosted by kube-apiserver. This mode is not allowed for kube-apiserver. | | `kubeConfigFile` **[Required]** `string` | Path to KubeConfigFile for connection info Required, if connectionInfo.Type is KubeConfig | ## `WebhookMatchCondition` {#apiserver-config-k8s-io-v1-WebhookMatchCondition} \*\*Appears in:\*\* - [WebhookConfiguration](#apiserver-config-k8s-io-v1-WebhookConfiguration) | Field | Description | | --- | --- | | `expression` **[Required]** `string` | expression represents the expression which will be evaluated by CEL. Must evaluate to bool. CEL expressions have access to the contents of the SubjectAccessReview in v1 version. If version specified by subjectAccessReviewVersion in the request variable is v1beta1, the contents would be converted to the v1 version before evaluating the CEL expression. * 'resourceAttributes' describes information for a resource access request and is unset for non-resource requests. e.g. has(request.resourceAttributes) && request.resourceAttributes.namespace == 'default' * 'nonResourceAttributes' describes information for a non-resource access request and is unset for resource requests. e.g. has(request.nonResourceAttributes) && request.nonResourceAttributes.path == '/healthz'. * 'user' is the user to test for. e.g. request.user == 'alice' * 'groups' is the groups to test for. e.g. ('group1' in request.groups) * 'extra' corresponds to the user.Info.GetExtra() method from the authenticator. * 'uid' is the information about the requesting user. e.g. request.uid == '1' Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/ |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/apiserver-config.v1.md
main
kubernetes
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0.135263
## Resource Types - [Preference](#kubectl-config-k8s-io-v1alpha1-Preference) ## `Preference` {#kubectl-config-k8s-io-v1alpha1-Preference} Preference stores elements of KubeRC configuration file | Field | Description | | --- | --- | | `apiVersion` string | `kubectl.config.k8s.io/v1alpha1` | | `kind` string | `Preference` | | `overrides` **[Required]** [`[]CommandDefaults`](#kubectl-config-k8s-io-v1alpha1-CommandDefaults) | overrides allows changing default flag values of commands. This is especially useful, when user doesn't want to explicitly set flags each time. | | `aliases` **[Required]** [`[]AliasOverride`](#kubectl-config-k8s-io-v1alpha1-AliasOverride) | aliases allow defining command aliases for existing kubectl commands, with optional default flag values. If the alias name collides with a built-in command, built-in command always takes precedence. Flag overrides defined in the overrides section do NOT apply to aliases for the same command. kubectl [ALIAS NAME] [USER\_FLAGS] [USER\_EXPLICIT\_ARGS] expands to kubectl [COMMAND] # built-in command alias points to [KUBERC\_PREPEND\_ARGS] [USER\_FLAGS] [KUBERC\_FLAGS] # rest of the flags that are not passed by user in [USER\_FLAGS] [USER\_EXPLICIT\_ARGS] [KUBERC\_APPEND\_ARGS] e.g. * name: runx command: run flags: + name: image default: nginx appendArgs: --- + custom-arg1 For example, if user invokes "kubectl runx test-pod" command, this will be expanded to "kubectl run --image=nginx test-pod -- custom-arg1" * name: getn command: get flags: + name: output default: wide prependArgs: + node "kubectl getn control-plane-1" expands to "kubectl get node control-plane-1 --output=wide" "kubectl getn control-plane-1 --output=json" expands to "kubectl get node --output=json control-plane-1" | ## `AliasOverride` {#kubectl-config-k8s-io-v1alpha1-AliasOverride} \*\*Appears in:\*\* - [Preference](#kubectl-config-k8s-io-v1alpha1-Preference) AliasOverride stores the alias definitions. | Field | Description | | --- | --- | | `name` **[Required]** `string` | name is the name of alias that can only include alphabetical characters If the alias name conflicts with the built-in command, built-in command will be used. | | `command` **[Required]** `string` | command is the single or set of commands to execute, such as "set env" or "create" | | `prependArgs` **[Required]** `[]string` | prependArgs stores the arguments such as resource names, etc. These arguments are inserted after the alias name. | | `appendArgs` **[Required]** `[]string` | appendArgs stores the arguments such as resource names, etc. These arguments are appended to the USER\_ARGS. | | `flags` **[Required]** [`[]CommandOptionDefault`](#kubectl-config-k8s-io-v1alpha1-CommandOptionDefault) | flags is allocated to store the flag definitions of alias. flags only modifies the default value of the flag and if user explicitly passes a value, explicit one is used. | ## `CommandDefaults` {#kubectl-config-k8s-io-v1alpha1-CommandDefaults} \*\*Appears in:\*\* - [Preference](#kubectl-config-k8s-io-v1alpha1-Preference) CommandDefaults stores the commands and their associated option's default values. | Field | Description | | --- | --- | | `command` **[Required]** `string` | command refers to a command whose flag's default value is changed. | | `flags` **[Required]** [`[]CommandOptionDefault`](#kubectl-config-k8s-io-v1alpha1-CommandOptionDefault) | flags is a list of flags storing different default values. | ## `CommandOptionDefault` {#kubectl-config-k8s-io-v1alpha1-CommandOptionDefault} \*\*Appears in:\*\* - [AliasOverride](#kubectl-config-k8s-io-v1alpha1-AliasOverride) - [CommandDefaults](#kubectl-config-k8s-io-v1alpha1-CommandDefaults) CommandOptionDefault stores the name and the specified default value of an option. | Field | Description | | --- | --- | | `name` **[Required]** `string` | Flag name (long form, without dashes). | | `default` **[Required]** `string` | In a string format of a default value. It will be parsed by kubectl to the compatible value of the flag. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kuberc.v1alpha1.md
main
kubernetes
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0.057157
## Overview Package v1beta4 defines the v1beta4 version of the kubeadm configuration file format. This version improves on the v1beta3 format by fixing some minor issues and adding a few new fields. A list of changes since v1beta3: v1.35: * Add `httpEndpoints` field to `ClusterConfiguration.etcd.externalEtcd` that can be used to configure the HTTP endpoints for etcd communication in v1beta4. This field is used to separate the HTTP traffic (such as `/metrics` and `/health` endpoints) from the gRPC traffic handled by `endpoints`. This separation allows for better access control, as HTTP endpoints can be exposed without exposing the primary gRPC interface. Corresponds to etcd's `--listen-client-http-urls` configuration. If not provided, `endpoints` will be used for both gRPC and HTTP traffic. v1.34: * Add "ECDSA-P384" to the allowed encryption algorithm options for `ClusterConfiguration.encryptionAlgorithm`. v1.33: * Add an `EtcdUpgrade` field to `UpgradeConfiguration.plan` that can be used to control whether the etcd upgrade plan should be displayed. v1.31: * Support custom environment variables in control plane components under `ClusterConfiguration`. Use `apiServer.extraEnvs`, `controllerManager.extraEnvs`, `scheduler.extraEnvs`, `etcd.local.extraEnvs`. * The `ResetConfiguration` API type is now supported in v1beta4. Users are able to reset a node by passing a `--config` file to `kubeadm reset`. * Dry run mode is now configureable in `InitConfiguration` and `JoinConfiguration`B. * Replace the existing string/string extra argument maps with structured extra arguments that support duplicates. The change applies to `ClusterConfiguration` - `apiServer.extraArgs`, `controllerManager.extraArgs`, `scheduler.extraArgs`, `etcd.local.extraArgs`. Also to `nodeRegistration.kubeletExtraArgs`. * Add `ClusterConfiguration.encryptionAlgorithm` that can be used to set the asymmetric encryption algorithm used for this cluster's keys and certificates. Can be one of `"RSA-2048"` (default), `"RSA-3072"`, `"RSA-4096"` or `"ECDSA-P256"`. * Add `ClusterConfiguration.dns.disabled` and `ClusterConfiguration.proxy.disabled` that can be used to disable the CoreDNS and kube-proxy addons during cluster initialization. Skipping the related addons phases, during cluster creation will set the same fields to `true`. * Add the `nodeRegistration.imagePullSerial` field in `InitConfiguration` and `JoinConfiguration`, which can be used to control if kubeadm pulls images serially or in parallel. * The `UpgradeConfiguration` kubeadm API is now supported in v1beta4 when passing `--config` to `kubeadm upgrade` subcommands. Usage of component configuration for `kubelet` and `kube-proxy`, `InitConfiguration` and `ClusterConfiguration` is deprecated and will be ignored when passing `--config` to `upgrade` subcommands. * Add a `Timeouts` structure to `InitConfiguration`, `JoinConfiguration`, `ResetConfiguration` and `UpgradeConfiguration` that can be used to configure various timeouts. The `ClusterConfiguration.timeoutForControlPlane` field is replaced by `Timeouts.controlPlaneComponentHealthCheck`. The `JoinConfiguration.discovery.timeout` is replaced by `timeouts.Discovery`. * Add a `certificateValidityPeriod` and `caCertificateValidityPeriod` fields to `ClusterConfiguration`. These fields can be used to control the validity period of certificates generated by kubeadm during sub-commands such as `init`, `join`, `upgrade` and `certs`. Default values continue to be 1 year for non-CA certificates and 10 years for CA certificates. Only non-CA certificates continue to be renewable by `kubeadm certs renew`. # Migration from old kubeadm config versions * kubeadm v1.15.x and newer can be used to migrate from v1beta1 to v1beta2. * kubeadm v1.22.x and newer no longer support v1beta1 and older APIs, but can be used to migrate v1beta2 to v1beta3. * kubeadm v1.27.x and newer no longer support v1beta2 and older APIs. * kubeadm v1.31.x and newer can be used to migrate from v1beta3 to v1beta4. ## Basics The preferred way to configure kubeadm is to pass a YAML configuration file with the `--config` option. Some of the configuration options defined in the kubeadm config file are also available as command line flags, but only the most common/simple use case are supported with this approach. A kubeadm config file could contain multiple configuration types separated using three dashes (`---`). kubeadm supports the following configuration types: ``` apiVersion: kubeadm.k8s.io/v1beta4 kind: InitConfiguration apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration apiVersion: kubelet.config.k8s.io/v1beta1
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.126958
are also available as command line flags, but only the most common/simple use case are supported with this approach. A kubeadm config file could contain multiple configuration types separated using three dashes (`---`). kubeadm supports the following configuration types: ``` apiVersion: kubeadm.k8s.io/v1beta4 kind: InitConfiguration apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration apiVersion: kubelet.config.k8s.io/v1beta1 kind: KubeletConfiguration apiVersion: kubeproxy.config.k8s.io/v1alpha1 kind: KubeProxyConfiguration apiVersion: kubeadm.k8s.io/v1beta4 kind: JoinConfiguration apiVersion: kubeadm.k8s.io/v1beta4 kind: ResetConfiguration apiVersion: kubeadm.k8s.io/v1beta4 kind: UpgradeConfiguration ``` To print the defaults for `init` and `join` actions use the following commands: ``` kubeadm config print init-defaults kubeadm config print join-defaults kubeadm config print reset-defaults kubeadm config print upgrade-defaults ``` The list of configuration types that must be included in a configuration file depends by the action you are performing (`init` or `join`) and by the configuration options you are going to use (defaults or advanced customization). If some configuration types are not provided, or provided only partially, kubeadm will use default values; defaults provided by kubeadm includes also enforcing consistency of values across components when required (e.g. `--cluster-cidr` flag on controller manager and `clusterCIDR` on kube-proxy). Users are always allowed to override default values, with the only exception of a small subset of setting with relevance for security (e.g. enforce authorization-mode Node and RBAC on api server). If the user provides a configuration types that is not expected for the action you are performing, kubeadm will ignore those types and print a warning. ## Kubeadm init configuration types When executing kubeadm init with the `--config` option, the following configuration types could be used: InitConfiguration, ClusterConfiguration, KubeProxyConfiguration, KubeletConfiguration, but only one between InitConfiguration and ClusterConfiguration is mandatory. ``` apiVersion: kubeadm.k8s.io/v1beta4 kind: InitConfiguration bootstrapTokens: ... nodeRegistration: ... ``` The InitConfiguration type should be used to configure runtime settings, that in case of kubeadm init are the configuration of the bootstrap token and all the setting which are specific to the node where kubeadm is executed, including: * NodeRegistration, that holds fields that relate to registering the new node to the cluster; use it to customize the node name, the CRI socket to use or any other settings that should apply to this node only (e.g. the node ip). * LocalAPIEndpoint, that represents the endpoint of the instance of the API server to be deployed on this node; use it e.g. to customize the API server advertise address. ``` apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration networking: ... etcd: ... apiServer: extraArgs: ... extraVolumes: ... ... ``` The ClusterConfiguration type should be used to configure cluster-wide settings, including settings for: * `networking` that holds configuration for the networking topology of the cluster; use it e.g. to customize Pod subnet or services subnet. * `etcd`: use it e.g. to customize the local etcd or to configure the API server for using an external etcd cluster. * kube-apiserver, kube-scheduler, kube-controller-manager configurations; use it to customize control-plane components by adding customized setting or overriding kubeadm default settings. ``` apiVersion: kubeproxy.config.k8s.io/v1alpha1 kind: KubeProxyConfiguration ... ``` The KubeProxyConfiguration type should be used to change the configuration passed to kube-proxy instances deployed in the cluster. If this object is not provided or provided only partially, kubeadm applies defaults. See https://kubernetes.io/docs/reference/command-line-tools-reference/kube-proxy/ or https://pkg.go.dev/k8s.io/kube-proxy/config/v1alpha1#KubeProxyConfiguration for kube-proxy official documentation. ``` apiVersion: kubelet.config.k8s.io/v1beta1 kind: KubeletConfiguration ... ``` The KubeletConfiguration type should be used to change the configurations that will be passed to all kubelet instances deployed in the cluster. If this object is not provided or provided only partially, kubeadm applies defaults. See https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/ or https://pkg.go.dev/k8s.io/kubelet/config/v1beta1#KubeletConfiguration for kubelet official documentation. Here is a fully populated example of a single YAML file containing multiple configuration types to be used during a `kubeadm init` run. ``` apiVersion:
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.111617
deployed in the cluster. If this object is not provided or provided only partially, kubeadm applies defaults. See https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/ or https://pkg.go.dev/k8s.io/kubelet/config/v1beta1#KubeletConfiguration for kubelet official documentation. Here is a fully populated example of a single YAML file containing multiple configuration types to be used during a `kubeadm init` run. ``` apiVersion: kubeadm.k8s.io/v1beta4 kind: InitConfiguration bootstrapTokens: - token: "9a08jv.c0izixklcxtmnze7" description: "kubeadm bootstrap token" ttl: "24h" - token: "783bde.3f89s0fje9f38fhf" description: "another bootstrap token" usages: - authentication - signing groups: - system:bootstrappers:kubeadm:default-node-token nodeRegistration: name: "ec2-10-100-0-1" criSocket: "unix:///var/run/containerd/containerd.sock" taints: - key: "kubeadmNode" value: "someValue" effect: "NoSchedule" kubeletExtraArgs: - name: v value: "5" ignorePreflightErrors: - IsPrivilegedUser imagePullPolicy: "IfNotPresent" imagePullSerial: true localAPIEndpoint: advertiseAddress: "10.100.0.1" bindPort: 6443 certificateKey: "e6a2eb8581237ab72a4f494f30285ec12a9694d750b9785706a83bfcbbbd2204" skipPhases: - preflight timeouts: controlPlaneComponentHealthCheck: "60s" kubenetesAPICall: "40s" --- apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration etcd: # one of local or external local: imageRepository: "registry.k8s.io" imageTag: "3.2.24" dataDir: "/var/lib/etcd" extraArgs: - name: listen-client-urls value: http://10.100.0.1:2379 extraEnvs: - name: SOME_VAR value: SOME_VALUE serverCertSANs: - ec2-10-100-0-1.compute-1.amazonaws.com peerCertSANs: - 10.100.0.1 # external: # endpoints: # - 10.100.0.1:2379 # - 10.100.0.2:2379 # caFile: "/etcd/kubernetes/pki/etcd/etcd-ca.crt" # certFile: "/etcd/kubernetes/pki/etcd/etcd.crt" # keyFile: "/etcd/kubernetes/pki/etcd/etcd.key" networking: serviceSubnet: "10.96.0.0/16" podSubnet: "10.244.0.0/24" dnsDomain: "cluster.local" kubernetesVersion: "v1.21.0" controlPlaneEndpoint: "10.100.0.1:6443" apiServer: extraArgs: - name: authorization-mode value: Node,RBAC extraEnvs: - name: SOME_VAR value: SOME_VALUE extraVolumes: - name: "some-volume" hostPath: "/etc/some-path" mountPath: "/etc/some-pod-path" readOnly: false pathType: File certSANs: - "10.100.1.1" - "ec2-10-100-0-1.compute-1.amazonaws.com" controllerManager: extraArgs: - name: node-cidr-mask-size value: "20" extraVolumes: - name: "some-volume" hostPath: "/etc/some-path" mountPath: "/etc/some-pod-path" readOnly: false pathType: File scheduler: extraArgs: - name: address value: 10.100.0.1 extraVolumes: - name: "some-volume" hostPath: "/etc/some-path" mountPath: "/etc/some-pod-path" readOnly: false pathType: File certificatesDir: "/etc/kubernetes/pki" imageRepository: "registry.k8s.io" clusterName: "example-cluster" encryptionAlgorithm: ECDSA-P256 dns: disabled: true # disable CoreDNS proxy: disabled: true # disable kube-proxy --- apiVersion: kubelet.config.k8s.io/v1beta1 kind: KubeletConfiguration # kubelet specific options here --- apiVersion: kubeproxy.config.k8s.io/v1alpha1 kind: KubeProxyConfiguration # kube-proxy specific options here ``` ## Kubeadm join configuration types When executing kubeadm join with the --config option, the JoinConfiguration type should be provided. ``` apiVersion: kubeadm.k8s.io/v1beta4 kind: JoinConfiguration discovery: bootstrapToken: apiServerEndpoint: some-address:6443 token: abcdef.0123456789abcdef unsafeSkipCAVerification: true tlsBootstrapToken: abcdef.0123456789abcdef ``` The JoinConfiguration type should be used to configure runtime settings, that in case of kubeadm join are the discovery method used for accessing the cluster info and all the setting which are specific to the node where kubeadm is executed, including: * `nodeRegistration`, that holds fields that relate to registering the new node to the cluster; use it to customize the node name, the CRI socket to use or any other settings that should apply to this node only (e.g. the node ip). * `apiEndpoint`, that represents the endpoint of the instance of the API server to be eventually deployed on this node. ## Kubeadm reset configuration types When executing `kubeadm reset` with the `--config` option, the `ResetConfiguration` type should be provided. ``` apiVersion: kubeadm.k8s.io/v1beta4 kind: ResetConfiguration ... ``` ## Kubeadm upgrade configuration types When executing `kubeadm upgrade` with the `--config` option, the `UpgradeConfiguration` type should be provided. ``` apiVersion: kubeadm.k8s.io/v1beta4 kind: UpgradeConfiguration apply: ... diff: ... node: ... plan: ... ``` The `UpgradeConfiguration` structure includes a few substructures that only apply to different subcommands of `kubeadm upgrade`. For example, the `apply` substructure will be used with the `kubeadm upgrade apply` subcommand and all other substructures will be ignored in such a case. ## Resource Types - [ClusterConfiguration](#kubeadm-k8s-io-v1beta4-ClusterConfiguration) - [InitConfiguration](#kubeadm-k8s-io-v1beta4-InitConfiguration) - [JoinConfiguration](#kubeadm-k8s-io-v1beta4-JoinConfiguration) - [ResetConfiguration](#kubeadm-k8s-io-v1beta4-ResetConfiguration) - [UpgradeConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeConfiguration) ## `BootstrapToken` {#BootstrapToken} \*\*Appears in:\*\* - [InitConfiguration](#kubeadm-k8s-io-v1beta3-InitConfiguration) - [InitConfiguration](#kubeadm-k8s-io-v1beta4-InitConfiguration) BootstrapToken describes one bootstrap token, stored as a Secret in the cluster | Field | Description | | --- | --- | | `token` **[Required]** [`BootstrapTokenString`](#BootstrapTokenString) | `token` is used for establishing bidirectional trust between nodes and control-planes. Used for joining nodes in the cluster.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.140148
in:\*\* - [InitConfiguration](#kubeadm-k8s-io-v1beta3-InitConfiguration) - [InitConfiguration](#kubeadm-k8s-io-v1beta4-InitConfiguration) BootstrapToken describes one bootstrap token, stored as a Secret in the cluster | Field | Description | | --- | --- | | `token` **[Required]** [`BootstrapTokenString`](#BootstrapTokenString) | `token` is used for establishing bidirectional trust between nodes and control-planes. Used for joining nodes in the cluster. | | `description` `string` | `description` sets a human-friendly message why this token exists and what it's used for, so other administrators can know its purpose. | | `ttl` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `ttl` defines the time to live for this token. Defaults to `24h`. `expires` and `ttl` are mutually exclusive. | | `expires` [`meta/v1.Time`](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.35/#time-v1-meta) | `expires` specifies the timestamp when this token expires. Defaults to being set dynamically at runtime based on the `ttl`. `expires` and `ttl` are mutually exclusive. | | `usages` `[]string` | `usages` describes the ways in which this token can be used. Can by default be used for establishing bidirectional trust, but that can be changed here. | | `groups` `[]string` | `groups` specifies the extra groups that this token will authenticate as when/if used for authentication | ## `BootstrapTokenString` {#BootstrapTokenString} \*\*Appears in:\*\* - [BootstrapToken](#BootstrapToken) BootstrapTokenString is a token of the format `abcdef.abcdef0123456789` that is used for both validation of the practically of the API server from a joining node's point of view and as an authentication method for the node in the bootstrap phase of "kubeadm join". This token is and should be short-lived. | Field | Description | | --- | --- | | `-` **[Required]** `string` | No description provided. | | `-` **[Required]** `string` | No description provided. | ## `ClusterConfiguration` {#kubeadm-k8s-io-v1beta4-ClusterConfiguration} ClusterConfiguration contains cluster-wide configuration for a kubeadm cluster. | Field | Description | | --- | --- | | `apiVersion` string | `kubeadm.k8s.io/v1beta4` | | `kind` string | `ClusterConfiguration` | | `etcd` [`Etcd`](#kubeadm-k8s-io-v1beta4-Etcd) | `etcd` holds the configuration for etcd. | | `networking` [`Networking`](#kubeadm-k8s-io-v1beta4-Networking) | `networking` holds configuration for the networking topology of the cluster. | | `kubernetesVersion` `string` | `kubernetesVersion` is the target version of the control plane. | | `controlPlaneEndpoint` `string` | `controlPlaneEndpoint` sets a stable IP address or DNS name for the control plane; It can be a valid IP address or a RFC-1123 DNS subdomain, both with optional TCP port. In case the `controlPlaneEndpoint` is not specified, the `advertiseAddress` + `bindPort` are used; in case the `controlPlaneEndpoint` is specified but without a TCP port, the `bindPort` is used. Possible usages are: * In a cluster with more than one control plane instances, this field should be assigned the address of the external load balancer in front of the control plane instances. * In environments with enforced node recycling, the `controlPlaneEndpoint` could be used for assigning a stable DNS to the control plane. | | `apiServer` [`APIServer`](#kubeadm-k8s-io-v1beta4-APIServer) | `apiServer` contains extra settings for the API server. | | `controllerManager` [`ControlPlaneComponent`](#kubeadm-k8s-io-v1beta4-ControlPlaneComponent) | `controllerManager` contains extra settings for the controller manager. | | `scheduler` [`ControlPlaneComponent`](#kubeadm-k8s-io-v1beta4-ControlPlaneComponent) | `scheduler` contains extra settings for the scheduler. | | `dns` [`DNS`](#kubeadm-k8s-io-v1beta4-DNS) | `dns` defines the options for the DNS add-on installed in the cluster. | | `proxy` **[Required]** [`Proxy`](#kubeadm-k8s-io-v1beta4-Proxy) | `proxy` defines the options for the proxy add-on installed in the cluster. | | `certificatesDir` `string` | `certificatesDir` specifies where to store or look for all required certificates. | | `imageRepository` `string` | `imageRepository` sets the container registry to pull images from. If empty, `registry.k8s.io` will be used by default. In case of kubernetes version is a CI build (kubernetes version starts with `ci/`) `gcr.io/k8s-staging-ci-images` will be used as a default for control plane components and for kube-proxy, while `registry.k8s.io` will be used for
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.274177
sets the container registry to pull images from. If empty, `registry.k8s.io` will be used by default. In case of kubernetes version is a CI build (kubernetes version starts with `ci/`) `gcr.io/k8s-staging-ci-images` will be used as a default for control plane components and for kube-proxy, while `registry.k8s.io` will be used for all the other images. | | `featureGates` `map[string]bool` | `featureGates` holds kubeadm-specific feature gates enabled by the user. | | `clusterName` `string` | The cluster name. This name will be used in kubeconfig files generated by kubeadm and will also be passed as a value to the kube-controller-manager's `--cluster-name` flag. The default value is `"kubernetes"`. | | `encryptionAlgorithm` [`EncryptionAlgorithmType`](#kubeadm-k8s-io-v1beta4-EncryptionAlgorithmType) | `encryptionAlgorithm` holds the type of asymmetric encryption algorithm used for keys and certificates. Can be one of `"RSA-2048"` (default), `"RSA-3072"`, `"RSA-4096"`, `"ECDSA-P256"` or `"ECDSA-P384"`. | | `certificateValidityPeriod` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `certificateValidityPeriod` specifies the validity period for a non-CA certificate generated by kubeadm. Default value: `8760h`` (365 days \* 24 hours = 1 year) | | `caCertificateValidityPeriod` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `caCertificateValidityPeriod` specifies the validity period for a CA certificate generated by kubeadm. Default value: `87600h` (365 days \* 24 hours \* 10 = 10 years) | ## `InitConfiguration` {#kubeadm-k8s-io-v1beta4-InitConfiguration} InitConfiguration contains a list of elements that is specific "kubeadm init"-only runtime information. `kubeadm init`-only information. These fields are solely used the first time `kubeadm init` runs. After that, the information in the fields IS NOT uploaded to the `kubeadm-config` ConfigMap that is used by `kubeadm upgrade` for instance. These fields must be omitempty. | Field | Description | | --- | --- | | `apiVersion` string | `kubeadm.k8s.io/v1beta4` | | `kind` string | `InitConfiguration` | | `bootstrapTokens` [`[]BootstrapToken`](#BootstrapToken) | `bootstrapTokens` is respected at `kubeadm init` time and describes a set of Bootstrap Tokens to create. This information IS NOT uploaded to the kubeadm cluster configmap, partly because of its sensitive nature | | `dryRun` **[Required]** `bool` | `dryRun` tells if the dry run mode is enabled, don't apply any change in dry run mode, just out put what would be done. | | `nodeRegistration` [`NodeRegistrationOptions`](#kubeadm-k8s-io-v1beta4-NodeRegistrationOptions) | `nodeRegistration` holds fields that relate to registering the new control-plane node to the cluster. | | `localAPIEndpoint` [`APIEndpoint`](#kubeadm-k8s-io-v1beta4-APIEndpoint) | `localAPIEndpoint` represents the endpoint of the API server instance that's deployed on this control plane node. In HA setups, this differs from `ClusterConfiguration.controlPlaneEndpoint` in the sense that `controlPlaneEndpoint` is the global endpoint for the cluster, which then loadbalances the requests to each individual API server. This configuration object lets you customize what IP/DNS name and port the local API server advertises it's accessible on. By default, kubeadm tries to auto-detect the IP of the default interface and use that, but in case that process fails you may set the desired value here. | | `certificateKey` `string` | `certificateKey` sets the key with which certificates and keys are encrypted prior to being uploaded in a Secret in the cluster during the `uploadcerts init` phase. The certificate key is a hex encoded string that is an AES key of size 32 bytes. | | `skipPhases` `[]string` | `skipPhases` is a list of phases to skip during command execution. The list of phases can be obtained with the `kubeadm init --help` command. The flag `--skip-phases` takes precedence over this field. | | `patches` [`Patches`](#kubeadm-k8s-io-v1beta4-Patches) | `patches` contains options related to applying patches to components deployed by kubeadm during `kubeadm init`. | | `timeouts` [`Timeouts`](#kubeadm-k8s-io-v1beta4-Timeouts) | `timeouts` holds various timeouts that apply to kubeadm commands. | ## `JoinConfiguration` {#kubeadm-k8s-io-v1beta4-JoinConfiguration} JoinConfiguration contains elements describing a particular node. | Field | Description | | --- | --- | | `apiVersion` string | `kubeadm.k8s.io/v1beta4` |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.128877
patches to components deployed by kubeadm during `kubeadm init`. | | `timeouts` [`Timeouts`](#kubeadm-k8s-io-v1beta4-Timeouts) | `timeouts` holds various timeouts that apply to kubeadm commands. | ## `JoinConfiguration` {#kubeadm-k8s-io-v1beta4-JoinConfiguration} JoinConfiguration contains elements describing a particular node. | Field | Description | | --- | --- | | `apiVersion` string | `kubeadm.k8s.io/v1beta4` | | `kind` string | `JoinConfiguration` | | `dryRun` `bool` | `dryRun` tells if the dry run mode is enabled, don't apply any change if it is set, just output what would be done. | | `nodeRegistration` [`NodeRegistrationOptions`](#kubeadm-k8s-io-v1beta4-NodeRegistrationOptions) | `nodeRegistration` holds fields that relate to registering the new control-plane node to the cluster | | `caCertPath` `string` | `caCertPath` is the path to the SSL certificate authority used to secure communications between node and control-plane. Defaults to "/etc/kubernetes/pki/ca.crt". | | `discovery` **[Required]** [`Discovery`](#kubeadm-k8s-io-v1beta4-Discovery) | `discovery` specifies the options for the kubelet to use during the TLS bootstrap process. | | `controlPlane` [`JoinControlPlane`](#kubeadm-k8s-io-v1beta4-JoinControlPlane) | `controlPlane` defines the additional control plane instance to be deployed on the joining node. If nil, no additional control plane instance will be deployed. | | `skipPhases` `[]string` | `skipPhases` is a list of phases to skip during command execution. The list of phases can be obtained with the `kubeadm join --help` command. The flag `--skip-phases` takes precedence over this field. | | `patches` [`Patches`](#kubeadm-k8s-io-v1beta4-Patches) | `patches` contains options related to applying patches to components deployed by kubeadm during `kubeadm join`. | | `timeouts` [`Timeouts`](#kubeadm-k8s-io-v1beta4-Timeouts) | `timeouts` holds various timeouts that apply to kubeadm commands. | ## `ResetConfiguration` {#kubeadm-k8s-io-v1beta4-ResetConfiguration} ResetConfiguration contains a list of fields that are specifically `kubeadm reset`-only runtime information. | Field | Description | | --- | --- | | `apiVersion` string | `kubeadm.k8s.io/v1beta4` | | `kind` string | `ResetConfiguration` | | `cleanupTmpDir` `bool` | `cleanupTmpDir` specifies whether the "/etc/kubernetes/tmp" directory should be cleaned during the reset process. | | `certificatesDir` `string` | `certificatesDir` specifies the directory where the certificates are stored. If specified, it will be cleaned during the reset process. | | `criSocket` `string` | `criSocket` is used to retrieve container runtime inforomation and used for the removal of the containers. If `criSocket` is not specified by flag or config file, kubeadm will try to detect one valid CRI socket instead. | | `dryRun` `bool` | `dryRun` tells if the dry run mode is enabled, don't apply any change if it is set and just output what would be done. | | `force` `bool` | The `force` flag instructs kubeadm to reset the node without prompting for confirmation. | | `ignorePreflightErrors` `[]string` | `ignorePreflightErrors` provides a list of pre-flight errors to be ignored during the reset process, e.g. `IsPrivilegedUser,Swap`. Value `all` ignores errors from all checks. | | `skipPhases` `[]string` | `skipPhases` is a list of phases to skip during command execution. The list of phases can be obtained with the `kubeadm reset phase --help` command. | | `unmountFlags` `[]string` | `unmountFlags` is a list of `unmount2()` syscall flags that kubeadm can use when unmounting directories during "reset". This flag can be one of: `"MNT_FORCE"`, `"MNT_DETACH"`, `"MNT_EXPIRE"`, `"UMOUNT_NOFOLLOW"`. By default this list is empty. | | `timeouts` [`Timeouts`](#kubeadm-k8s-io-v1beta4-Timeouts) | Timeouts holds various timeouts that apply to kubeadm commands. | ## `UpgradeConfiguration` {#kubeadm-k8s-io-v1beta4-UpgradeConfiguration} UpgradeConfiguration contains a list of options that are specific to `kubeadm upgrade` subcommands. | Field | Description | | --- | --- | | `apiVersion` string | `kubeadm.k8s.io/v1beta4` | | `kind` string | `UpgradeConfiguration` | | `apply` [`UpgradeApplyConfiguration`](#kubeadm-k8s-io-v1beta4-UpgradeApplyConfiguration) | `apply` holds a list of options that are specific to the `kubeadm upgrade apply` command. | | `diff` [`UpgradeDiffConfiguration`](#kubeadm-k8s-io-v1beta4-UpgradeDiffConfiguration) | `diff` holds a list of options that are specific to the `kubeadm
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.0902
--- | | `apiVersion` string | `kubeadm.k8s.io/v1beta4` | | `kind` string | `UpgradeConfiguration` | | `apply` [`UpgradeApplyConfiguration`](#kubeadm-k8s-io-v1beta4-UpgradeApplyConfiguration) | `apply` holds a list of options that are specific to the `kubeadm upgrade apply` command. | | `diff` [`UpgradeDiffConfiguration`](#kubeadm-k8s-io-v1beta4-UpgradeDiffConfiguration) | `diff` holds a list of options that are specific to the `kubeadm upgrade diff` command. | | `node` [`UpgradeNodeConfiguration`](#kubeadm-k8s-io-v1beta4-UpgradeNodeConfiguration) | `node` holds a list of options that are specific to the `kubeadm upgrade node` command. | | `plan` [`UpgradePlanConfiguration`](#kubeadm-k8s-io-v1beta4-UpgradePlanConfiguration) | `plan` holds a list of options that are specific to the `kubeadm upgrade plan` command. | | `timeouts` [`Timeouts`](#kubeadm-k8s-io-v1beta4-Timeouts) | `timeouts` holds various timeouts that apply to kubeadm commands. | ## `APIEndpoint` {#kubeadm-k8s-io-v1beta4-APIEndpoint} \*\*Appears in:\*\* - [InitConfiguration](#kubeadm-k8s-io-v1beta4-InitConfiguration) - [JoinControlPlane](#kubeadm-k8s-io-v1beta4-JoinControlPlane) APIEndpoint struct contains elements of API server instance deployed on a node. | Field | Description | | --- | --- | | `advertiseAddress` `string` | `dvertiseAddress` sets the IP address for the API server to advertise. | | `bindPort` `int32` | `bindPort` sets the secure port for the API Server to bind to. Defaults to 6443. | ## `APIServer` {#kubeadm-k8s-io-v1beta4-APIServer} \*\*Appears in:\*\* - [ClusterConfiguration](#kubeadm-k8s-io-v1beta4-ClusterConfiguration) APIServer holds settings necessary for API server deployments in the cluster | Field | Description | | --- | --- | | `ControlPlaneComponent` **[Required]** [`ControlPlaneComponent`](#kubeadm-k8s-io-v1beta4-ControlPlaneComponent) | (Members of `ControlPlaneComponent` are embedded into this type.) No description provided. | | `certSANs` `[]string` | `certSANs` sets extra Subject Alternative Names (SANs) for the API Server signing certificate. | ## `Arg` {#kubeadm-k8s-io-v1beta4-Arg} \*\*Appears in:\*\* - [ControlPlaneComponent](#kubeadm-k8s-io-v1beta4-ControlPlaneComponent) - [LocalEtcd](#kubeadm-k8s-io-v1beta4-LocalEtcd) - [NodeRegistrationOptions](#kubeadm-k8s-io-v1beta4-NodeRegistrationOptions) Arg represents an argument with a name and a value. | Field | Description | | --- | --- | | `name` **[Required]** `string` | The name of the argument. | | `value` **[Required]** `string` | The value of the argument. | ## `BootstrapTokenDiscovery` {#kubeadm-k8s-io-v1beta4-BootstrapTokenDiscovery} \*\*Appears in:\*\* - [Discovery](#kubeadm-k8s-io-v1beta4-Discovery) BootstrapTokenDiscovery is used to set the options for bootstrap token based discovery. | Field | Description | | --- | --- | | `token` **[Required]** `string` | `token` is a token used to validate cluster information fetched from the control-plane. | | `apiServerEndpoint` `string` | `apiServerEndpoint` is an IP or domain name to the API server from which information will be fetched. | | `caCertHashes` `[]string` | `caCertHashes` specifies a set of public key pins to verify when token-based discovery is used. The root CA found during discovery must match one of these values. Specifying an empty set disables root CA pinning, which can be unsafe. Each hash is specified as `<type>:<value>`, where the only currently supported type is "sha256". This is a hex-encoded SHA-256 hash of the Subject Public Key Info (SPKI) object in DER-encoded ASN.1. These hashes can be // calculated using, for example, OpenSSL. | | `unsafeSkipCAVerification` `bool` | `unsafeSkipCAVerification` allows token-based discovery without CA verification via `caCertHashes`. This can weaken the security of kubeadm since other nodes can impersonate the control-plane. | ## `ControlPlaneComponent` {#kubeadm-k8s-io-v1beta4-ControlPlaneComponent} \*\*Appears in:\*\* - [ClusterConfiguration](#kubeadm-k8s-io-v1beta4-ClusterConfiguration) - [APIServer](#kubeadm-k8s-io-v1beta4-APIServer) ControlPlaneComponent holds settings common to control plane component of the cluster | Field | Description | | --- | --- | | `extraArgs` [`[]Arg`](#kubeadm-k8s-io-v1beta4-Arg) | `extraArgs` is an extra set of flags to pass to the control plane component. An argument name in this list is the flag name as it appears on the command line except without leading dash(es). Extra arguments will override existing default arguments. Duplicate extra arguments are allowed. | | `extraVolumes` [`[]HostPathMount`](#kubeadm-k8s-io-v1beta4-HostPathMount) | `extraVolumes` is an extra set of host volumes, mounted to the control plane component. | | `extraEnvs` [`[]EnvVar`](#kubeadm-k8s-io-v1beta4-EnvVar) | `extraEnvs` is an extra set of environment variables to pass to the control plane component. Environment variables passed using `extraEnvs` will
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.090163
Duplicate extra arguments are allowed. | | `extraVolumes` [`[]HostPathMount`](#kubeadm-k8s-io-v1beta4-HostPathMount) | `extraVolumes` is an extra set of host volumes, mounted to the control plane component. | | `extraEnvs` [`[]EnvVar`](#kubeadm-k8s-io-v1beta4-EnvVar) | `extraEnvs` is an extra set of environment variables to pass to the control plane component. Environment variables passed using `extraEnvs` will override any existing environment variables, or `*_proxy` environment variables that kubeadm adds by default. | ## `DNS` {#kubeadm-k8s-io-v1beta4-DNS} \*\*Appears in:\*\* - [ClusterConfiguration](#kubeadm-k8s-io-v1beta4-ClusterConfiguration) DNS defines the DNS addon that should be used in the cluster | Field | Description | | --- | --- | | `ImageMeta` **[Required]** [`ImageMeta`](#kubeadm-k8s-io-v1beta4-ImageMeta) | (Members of `ImageMeta` are embedded into this type.) `imageMeta` allows to customize the image used for the DNS addon. | | `disabled` **[Required]** `bool` | `disabled` specifies whether to disable this addon in the cluster. | ## `Discovery` {#kubeadm-k8s-io-v1beta4-Discovery} \*\*Appears in:\*\* - [JoinConfiguration](#kubeadm-k8s-io-v1beta4-JoinConfiguration) Discovery specifies the options for the kubelet to use during the TLS Bootstrap process | Field | Description | | --- | --- | | `bootstrapToken` [`BootstrapTokenDiscovery`](#kubeadm-k8s-io-v1beta4-BootstrapTokenDiscovery) | `bootstrapToken` is used to set the options for bootstrap token based discovery. `bootstrapToken` and `file` are mutually exclusive. | | `file` [`FileDiscovery`](#kubeadm-k8s-io-v1beta4-FileDiscovery) | `file` is used to specify a file or URL to a kubeconfig file from which to load cluster information. `bootstrapToken` and `file` are mutually exclusive. | | `tlsBootstrapToken` `string` | `tlsBootstrapToken` is a token used for TLS bootstrapping. If `bootstrapToken` is set, this field is defaulted to `bootstrapToken.token`, but can be overridden. If `file` is set, this field **must be set** in case the KubeConfigFile does not contain any other authentication information. | ## `EncryptionAlgorithmType` {#kubeadm-k8s-io-v1beta4-EncryptionAlgorithmType} (Alias of `string`) \*\*Appears in:\*\* - [ClusterConfiguration](#kubeadm-k8s-io-v1beta4-ClusterConfiguration) EncryptionAlgorithmType can define an asymmetric encryption algorithm type. ## `EnvVar` {#kubeadm-k8s-io-v1beta4-EnvVar} \*\*Appears in:\*\* - [ControlPlaneComponent](#kubeadm-k8s-io-v1beta4-ControlPlaneComponent) - [LocalEtcd](#kubeadm-k8s-io-v1beta4-LocalEtcd) EnvVar represents an environment variable present in a Container. | Field | Description | | --- | --- | | `EnvVar` **[Required]** [`core/v1.EnvVar`](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.35/#envvar-v1-core) | (Members of `EnvVar` are embedded into this type.) No description provided. | ## `Etcd` {#kubeadm-k8s-io-v1beta4-Etcd} \*\*Appears in:\*\* - [ClusterConfiguration](#kubeadm-k8s-io-v1beta4-ClusterConfiguration) Etcd contains elements describing Etcd configuration. | Field | Description | | --- | --- | | `local` [`LocalEtcd`](#kubeadm-k8s-io-v1beta4-LocalEtcd) | `local` provides configuration knobs for configuring the local etcd instance. `local` and `external` are mutually exclusive. | | `external` [`ExternalEtcd`](#kubeadm-k8s-io-v1beta4-ExternalEtcd) | `external` describes how to connect to an external etcd cluster. `local` and `external` are mutually exclusive. | ## `ExternalEtcd` {#kubeadm-k8s-io-v1beta4-ExternalEtcd} \*\*Appears in:\*\* - [Etcd](#kubeadm-k8s-io-v1beta4-Etcd) ExternalEtcd describes an external etcd cluster. Kubeadm has no knowledge of where certificate files live and they must be supplied. | Field | Description | | --- | --- | | `endpoints` **[Required]** `[]string` | `endpoints` contains the list of etcd members. This specifies the client URLs (usually gRPC endpoints) for etcd communication. By default, these endpoints handle both gRPC traffic (primary etcd protocol) and HTTP traffic (metrics, health checks). However, if `httpEndpoints` is configured, the gRPC and HTTP traffic can be separated for better security and performance. Corresponds to etcd's `--listen-client-urls` configuration. | | `httpEndpoints` `[]string` | `httpEndpoints` are the dedicated HTTP endpoints for etcd communication. When configured, HTTP traffic (such as `/metics` and `/health` endpoints) is separated from the gRPC traffic handled by `endpoints`. This separation allows for better access control, as HTTP endpoints can be exposed without exposing the primary gRPC interface. Corresponds to etcd's `--listen-client-http-urls` configuration. If not provided, `endpoints` will be used for both gRPC and HTTP traffic. | | `caFile` **[Required]** `string` | `caFile` is an SSL Certificate Authority (CA) file used to secure etcd communication. Required if using a TLS connection. | | `certFile` **[Required]** `string` | `certFile` is an SSL certification
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.081092
configuration. If not provided, `endpoints` will be used for both gRPC and HTTP traffic. | | `caFile` **[Required]** `string` | `caFile` is an SSL Certificate Authority (CA) file used to secure etcd communication. Required if using a TLS connection. | | `certFile` **[Required]** `string` | `certFile` is an SSL certification file used to secure etcd communication. Required if using a TLS connection. | | `keyFile` **[Required]** `string` | `keyFile` is an SSL key file used to secure etcd communication. Required if using a TLS connection. | ## `FileDiscovery` {#kubeadm-k8s-io-v1beta4-FileDiscovery} \*\*Appears in:\*\* - [Discovery](#kubeadm-k8s-io-v1beta4-Discovery) FileDiscovery is used to specify a file or URL to a kubeconfig file from which to load cluster information. | Field | Description | | --- | --- | | `kubeConfigPath` **[Required]** `string` | `kubeConfigPath` is used to specify the actual file path or URL to the kubeconfig file from which to load cluster information. | ## `HostPathMount` {#kubeadm-k8s-io-v1beta4-HostPathMount} \*\*Appears in:\*\* - [ControlPlaneComponent](#kubeadm-k8s-io-v1beta4-ControlPlaneComponent) HostPathMount contains elements describing volumes that are mounted from the host. | Field | Description | | --- | --- | | `name` **[Required]** `string` | `name` is the name of the volume inside the Pod template. | | `hostPath` **[Required]** `string` | `hostPath` is the path in the host that will be mounted inside the Pod. | | `mountPath` **[Required]** `string` | `mountPath` is the path inside the Pod where `hostPath` will be mounted. | | `readOnly` `bool` | `readOnly` controls write access to the volume. | | `pathType` [`core/v1.HostPathType`](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.35/#hostpathtype-v1-core) | `pathType` is the type of the `hostPath`. | ## `ImageMeta` {#kubeadm-k8s-io-v1beta4-ImageMeta} \*\*Appears in:\*\* - [DNS](#kubeadm-k8s-io-v1beta4-DNS) - [LocalEtcd](#kubeadm-k8s-io-v1beta4-LocalEtcd) ImageMeta allows to customize the image used for components that are not originated from the Kubernetes/Kubernetes release process | Field | Description | | --- | --- | | `imageRepository` `string` | `imageRepository` sets the container registry to pull images from. if not set, the `imageRepository` defined in ClusterConfiguration will be used instead. | | `imageTag` `string` | `imageTag` allows to specify a tag for the image. In case this value is set, kubeadm does not change automatically the version of the above components during upgrades. | ## `JoinControlPlane` {#kubeadm-k8s-io-v1beta4-JoinControlPlane} \*\*Appears in:\*\* - [JoinConfiguration](#kubeadm-k8s-io-v1beta4-JoinConfiguration) JoinControlPlane contains elements describing an additional control plane instance to be deployed on the joining node. | Field | Description | | --- | --- | | `localAPIEndpoint` [`APIEndpoint`](#kubeadm-k8s-io-v1beta4-APIEndpoint) | `localAPIEndpoint` represents the endpoint of the API server instance to be deployed on this node. | | `certificateKey` `string` | `certificateKey` is the key that is used for decryption of certificates after they are downloaded from the Secret upon joining a new control plane node. The corresponding encryption key is in the InitConfiguration. The certificate key is a hex encoded string that is an AES key of size 32 bytes. | ## `LocalEtcd` {#kubeadm-k8s-io-v1beta4-LocalEtcd} \*\*Appears in:\*\* - [Etcd](#kubeadm-k8s-io-v1beta4-Etcd) LocalEtcd describes that kubeadm should run an etcd cluster locally. | Field | Description | | --- | --- | | `ImageMeta` **[Required]** [`ImageMeta`](#kubeadm-k8s-io-v1beta4-ImageMeta) | (Members of `ImageMeta` are embedded into this type.) ImageMeta allows to customize the container image used for etcd. Passing a custom etcd image tells `kubeadm upgrade` that this image is user-managed and that its upgrade must be skipped. | | `dataDir` **[Required]** `string` | `dataDir` is the directory etcd will place its data. Defaults to "/var/lib/etcd". | | `extraArgs` **[Required]** [`[]Arg`](#kubeadm-k8s-io-v1beta4-Arg) | `extraArgs` are extra arguments provided to the etcd binary when run inside a static Pod. An argument name in this list is the flag name as it appears on the command line except without leading dash(es). Extra arguments will override existing default arguments. Duplicate extra arguments
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.138717
`extraArgs` **[Required]** [`[]Arg`](#kubeadm-k8s-io-v1beta4-Arg) | `extraArgs` are extra arguments provided to the etcd binary when run inside a static Pod. An argument name in this list is the flag name as it appears on the command line except without leading dash(es). Extra arguments will override existing default arguments. Duplicate extra arguments are allowed. | | `extraEnvs` [`[]EnvVar`](#kubeadm-k8s-io-v1beta4-EnvVar) | `extraEnvs` is an extra set of environment variables to pass to the control plane component. Environment variables passed using `extraEnvs` will override any existing environment variables, or `*_proxy` environment variables that kubeadm adds by default. | | `serverCertSANs` `[]string` | `serverCertSANs` sets extra Subject Alternative Names (SANs) for the etcd server signing certificate. | | `peerCertSANs` `[]string` | `peerCertSANs` sets extra Subject Alternative Names (SANs) for the etcd peer signing certificate. | ## `Networking` {#kubeadm-k8s-io-v1beta4-Networking} \*\*Appears in:\*\* - [ClusterConfiguration](#kubeadm-k8s-io-v1beta4-ClusterConfiguration) Networking contains elements describing cluster's networking configuration. | Field | Description | | --- | --- | | `serviceSubnet` `string` | `serviceSubnet` is the subnet used by Kubernetes Services. Defaults to "10.96.0.0/12". | | `podSubnet` `string` | `podSubnet` is the subnet used by Pods. | | `dnsDomain` `string` | `dnsDomain` is the dns domain used by Kubernetes Services. Defaults to "cluster.local". | ## `NodeRegistrationOptions` {#kubeadm-k8s-io-v1beta4-NodeRegistrationOptions} \*\*Appears in:\*\* - [InitConfiguration](#kubeadm-k8s-io-v1beta4-InitConfiguration) - [JoinConfiguration](#kubeadm-k8s-io-v1beta4-JoinConfiguration) NodeRegistrationOptions holds fields that relate to registering a new control-plane or node to the cluster, either via `kubeadm init` or `kubeadm join`. | Field | Description | | --- | --- | | `name` `string` | `name` is the `.Metadata.Name` field of the Node API object that will be created in this `kubeadm init` or `kubeadm join` operation. This field is also used in the `CommonName` field of the kubelet's client certificate to the API server. Defaults to the hostname of the node if not provided. | | `criSocket` `string` | `criSocket` is used to retrieve container runtime info. This information will be annotated to the Node API object, for later re-use. | | `taints` **[Required]** [`[]core/v1.Taint`](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.35/#taint-v1-core) | `taints` specifies the taints the Node API object should be registered with. If this field is unset, i.e. nil, it will be defaulted with a control-plane taint for control-plane nodes. If you don't want to taint your control-plane node, set this field to an empty list, i.e. `taints: []` in the YAML file. This field is solely used for Node registration. | | `kubeletExtraArgs` [`[]Arg`](#kubeadm-k8s-io-v1beta4-Arg) | `kubeletExtraArgs` passes through extra arguments to the kubelet. The arguments here are passed to the kubelet command line via the environment file kubeadm writes at runtime for the kubelet to source. This overrides the generic base-level configuration in the `kubelet-config` ConfigMap. Flags have higher priority when parsing. These values are local and specific to the node kubeadm is executing on. An argument name in this list is the flag name as it appears on the command line except without leading dash(es). Extra arguments will override existing default arguments. Duplicate extra arguments are allowed. | | `ignorePreflightErrors` `[]string` | `ignorePreflightErrors` provides a slice of pre-flight errors to be ignored when the current node is registered, e.g. 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks. | | `imagePullPolicy` [`core/v1.PullPolicy`](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.35/#pullpolicy-v1-core) | `imagePullPolicy` specifies the policy for image pulling during kubeadm `init` and `join` operations. The value of this field must be one of "Always", "IfNotPresent" or "Never". If this field is unset kubeadm will default it to "IfNotPresent", or pull the required images if not present on the host. | | `imagePullSerial` `bool` | `imagePullSerial` specifies if image pulling performed by kubeadm must be done serially or in parallel. Default: true | ## `Patches` {#kubeadm-k8s-io-v1beta4-Patches} \*\*Appears in:\*\* - [InitConfiguration](#kubeadm-k8s-io-v1beta4-InitConfiguration) - [JoinConfiguration](#kubeadm-k8s-io-v1beta4-JoinConfiguration) -
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.110927
kubeadm will default it to "IfNotPresent", or pull the required images if not present on the host. | | `imagePullSerial` `bool` | `imagePullSerial` specifies if image pulling performed by kubeadm must be done serially or in parallel. Default: true | ## `Patches` {#kubeadm-k8s-io-v1beta4-Patches} \*\*Appears in:\*\* - [InitConfiguration](#kubeadm-k8s-io-v1beta4-InitConfiguration) - [JoinConfiguration](#kubeadm-k8s-io-v1beta4-JoinConfiguration) - [UpgradeApplyConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeApplyConfiguration) - [UpgradeNodeConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeNodeConfiguration) Patches contains options related to applying patches to components deployed by kubeadm. | Field | Description | | --- | --- | | `directory` `string` | `directory` is a path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration", "corednsdeployment". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically. | ## `Proxy` {#kubeadm-k8s-io-v1beta4-Proxy} \*\*Appears in:\*\* - [ClusterConfiguration](#kubeadm-k8s-io-v1beta4-ClusterConfiguration) Proxy defines the proxy addon that should be used in the cluster. | Field | Description | | --- | --- | | `disabled` **[Required]** `bool` | `disabled` specifies whether to disable this addon in the cluster. | ## `Timeouts` {#kubeadm-k8s-io-v1beta4-Timeouts} \*\*Appears in:\*\* - [InitConfiguration](#kubeadm-k8s-io-v1beta4-InitConfiguration) - [JoinConfiguration](#kubeadm-k8s-io-v1beta4-JoinConfiguration) - [ResetConfiguration](#kubeadm-k8s-io-v1beta4-ResetConfiguration) - [UpgradeConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeConfiguration) Timeouts holds various timeouts that apply to kubeadm commands. | Field | Description | | --- | --- | | `controlPlaneComponentHealthCheck` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `controlPlaneComponentHealthCheck` is the amount of time to wait for a control plane component, such as the API server, to be healthy during `kubeadm init` and `kubeadm join`. Default: 4m | | `kubeletHealthCheck` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `kubeletHealthCheck` is the amount of time to wait for the kubelet to be healthy during `kubeadm init` and `kubeadm join`. Default: 4m | | `kubernetesAPICall` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `kubernetesAPICall` is the amount of time to wait for the kubeadm client to complete a request to the API server. This applies to all types of methods (GET, POST, etc). Default: 1m | | `etcdAPICall` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `etcdAPICall` is the amount of time to wait for the kubeadm etcd client to complete a request to the etcd cluster. Default: 2m | | `tlsBootstrap` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `tlsBootstrap` is the amount of time to wait for the kubelet to complete TLS bootstrap for a joining node. Default: 5m | | `discovery` [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `discovery` is the amount of time to wait for kubeadm to validate the API server identity for a joining node. Default: 5m | | `upgradeManifests` **[Required]** [`meta/v1.Duration`](https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#Duration) | `upgradeManifests` is the timeout for upgrading static Pod manifests Default: 5m | ## `UpgradeApplyConfiguration` {#kubeadm-k8s-io-v1beta4-UpgradeApplyConfiguration} \*\*Appears in:\*\* - [UpgradeConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeConfiguration) UpgradeApplyConfiguration contains a list of configurable options which are specific to the "kubeadm upgrade apply" command. | Field | Description | | --- | --- | | `kubernetesVersion` `string` | `kubernetesVersion` is the target version of the control plane. | | `allowExperimentalUpgrades` `bool` | `allowExperimentalUpgrades` instructs kubeadm to show unstable versions of Kubernetes as an upgrade alternative and allows upgrading to an alpha/beta/release candidate version of Kubernetes. Default: false | | `allowRCUpgrades` `bool` | Enable `allowRCUpgrades` will show release candidate versions of Kubernetes as an upgrade alternative and allows upgrading to a release candidate version of Kubernetes. | | `certificateRenewal` `bool` | `certificateRenewal` instructs kubeadm to execute certificate renewal during upgrades. Defaults to true. | | `dryRun` `bool` | `dryRun` tells if the dry run mode is enabled, don't apply any change if it is and just output what would be done. | | `etcdUpgrade` `bool` | `etcdUpgrade` instructs kubeadm to execute etcd upgrade during upgrades. Defaults to true. | | `forceUpgrade` `bool` |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.13641
| | `dryRun` `bool` | `dryRun` tells if the dry run mode is enabled, don't apply any change if it is and just output what would be done. | | `etcdUpgrade` `bool` | `etcdUpgrade` instructs kubeadm to execute etcd upgrade during upgrades. Defaults to true. | | `forceUpgrade` `bool` | `forceUpgrade` flag instructs kubeadm to upgrade the cluster without prompting for confirmation. | | `ignorePreflightErrors` `[]string` | `ignorePreflightErrors` provides a slice of pre-flight errors to be ignored during the upgrade process, e.g. `IsPrivilegedUser,Swap`. Value `all` ignores errors from all checks. | | `patches` [`Patches`](#kubeadm-k8s-io-v1beta4-Patches) | `patches` contains options related to applying patches to components deployed by kubeadm during `kubeadm upgrade`. | | `printConfig` `bool` | `printConfig` specifies whether the configuration file that will be used in the upgrade should be printed or not. | | `skipPhases` **[Required]** `[]string` | `skipPhases` is a list of phases to skip during command execution. NOTE: This field is currently ignored for `kubeadm upgrade apply`, but in the future it will be supported. | | `imagePullPolicy` [`core/v1.PullPolicy`](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.35/#pullpolicy-v1-core) | `imagePullPolicy` specifies the policy for image pulling during `kubeadm upgrade apply` operations. The value of this field must be one of "Always", "IfNotPresent" or "Never". If this field is unset kubeadm will default it to "IfNotPresent", or pull the required images if not present on the host. | | `imagePullSerial` `bool` | `imagePullSerial` specifies if image pulling performed by kubeadm must be done serially or in parallel. Default: true | ## `UpgradeDiffConfiguration` {#kubeadm-k8s-io-v1beta4-UpgradeDiffConfiguration} \*\*Appears in:\*\* - [UpgradeConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeConfiguration) UpgradeDiffConfiguration contains a list of configurable options which are specific to the `kubeadm upgrade diff` command. | Field | Description | | --- | --- | | `kubernetesVersion` `string` | `kubernetesVersion` is the target version of the control plane. | | `contextLines` `int` | `diffContextLines` is the number of lines of context in the diff. | ## `UpgradeNodeConfiguration` {#kubeadm-k8s-io-v1beta4-UpgradeNodeConfiguration} \*\*Appears in:\*\* - [UpgradeConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeConfiguration) UpgradeNodeConfiguration contains a list of configurable options which are specific to the "kubeadm upgrade node" command. | Field | Description | | --- | --- | | `certificateRenewal` `bool` | `certificateRenewal` instructs kubeadm to execute certificate renewal during upgrades. Defaults to true. | | `dryRun` `bool` | `dryRun` tells if the dry run mode is enabled, don't apply any change if it is and just output what would be done. | | `etcdUpgrade` `bool` | `etcdUpgrade` instructs kubeadm to execute etcd upgrade during upgrades. Defaults to true. | | `ignorePreflightErrors` `[]string` | `ignorePreflightErrors` provides a slice of pre-flight errors to be ignored during the upgrade process, e.g. 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks. | | `skipPhases` `[]string` | `skipPhases` is a list of phases to skip during command execution. The list of phases can be obtained with the `kubeadm upgrade node phase --help` command. | | `patches` [`Patches`](#kubeadm-k8s-io-v1beta4-Patches) | `patches` contains options related to applying patches to components deployed by kubeadm during `kubeadm upgrade`. | | `imagePullPolicy` [`core/v1.PullPolicy`](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.35/#pullpolicy-v1-core) | `imagePullPolicy` specifies the policy for image pulling during `kubeadm upgrade node` operations. The value of this field must be one of "Always", "IfNotPresent" or "Never". If this field is unset kubeadm will default it to "IfNotPresent", or pull the required images if not present on the host. | | `imagePullSerial` `bool` | `imagePullSerial` specifies if image pulling performed by kubeadm must be done serially or in parallel. Default: true | ## `UpgradePlanConfiguration` {#kubeadm-k8s-io-v1beta4-UpgradePlanConfiguration} \*\*Appears in:\*\* - [UpgradeConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeConfiguration) UpgradePlanConfiguration contains a list of configurable options which are specific to the "kubeadm upgrade plan" command. | Field | Description | | --- | --- | | `kubernetesVersion` **[Required]** `string` | `kubernetesVersion` is the target version of the control
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.04742
parallel. Default: true | ## `UpgradePlanConfiguration` {#kubeadm-k8s-io-v1beta4-UpgradePlanConfiguration} \*\*Appears in:\*\* - [UpgradeConfiguration](#kubeadm-k8s-io-v1beta4-UpgradeConfiguration) UpgradePlanConfiguration contains a list of configurable options which are specific to the "kubeadm upgrade plan" command. | Field | Description | | --- | --- | | `kubernetesVersion` **[Required]** `string` | `kubernetesVersion` is the target version of the control plane. | | `allowExperimentalUpgrades` `bool` | `allowExperimentalUpgrades` instructs kubeadm to show unstable versions of Kubernetes as an upgrade alternative and allows upgrading to an alpha/beta/release candidate version of Kubernetes. Default: false | | `allowRCUpgrades` `bool` | Enable `allowRCUpgrades` will show release candidate versions of Kubernetes as an upgrade alternative and allows upgrading to a release candidate version of Kubernetes. | | `dryRun` `bool` | `dryRun` tells if the dry run mode is enabled, don't apply any change if it is and just output what would be done. | | `etcdUpgrade` `bool` | `etcdUpgrade` instructs kubeadm to execute etcd upgrade during upgrades. Defaults to true. | | `ignorePreflightErrors` `[]string` | `ignorePreflightErrors` provides a slice of pre-flight errors to be ignored during the upgrade process, e.g. 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks. | | `printConfig` `bool` | `printConfig` specifies whether the configuration file that will be used in the upgrade should be printed or not. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kubeadm-config.v1beta4.md
main
kubernetes
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0.082953
## Resource Types - [Preference](#kubectl-config-k8s-io-v1beta1-Preference) ## `Preference` {#kubectl-config-k8s-io-v1beta1-Preference} Preference stores elements of KubeRC configuration file | Field | Description | | --- | --- | | `apiVersion` string | `kubectl.config.k8s.io/v1beta1` | | `kind` string | `Preference` | | `defaults` **[Required]** [`[]CommandDefaults`](#kubectl-config-k8s-io-v1beta1-CommandDefaults) | defaults allow changing default option values of commands. This is especially useful, when user doesn't want to explicitly set options each time. | | `aliases` **[Required]** [`[]AliasOverride`](#kubectl-config-k8s-io-v1beta1-AliasOverride) | aliases allow defining command aliases for existing kubectl commands, with optional default option values. If the alias name collides with a built-in command, built-in command always takes precedence. Option overrides defined in the defaults section do NOT apply to aliases for the same command. kubectl [ALIAS NAME] [USER\_OPTIONS] [USER\_EXPLICIT\_ARGS] expands to kubectl [COMMAND] # built-in command alias points to [KUBERC\_PREPEND\_ARGS] [USER\_OPTIONS] [KUBERC\_OPTIONS] # rest of the options that are not passed by user in [USER\_OPTIONS] [USER\_EXPLICIT\_ARGS] [KUBERC\_APPEND\_ARGS] e.g. * name: runx command: run options: + name: image default: nginx appendArgs: --- + custom-arg1 For example, if user invokes "kubectl runx test-pod" command, this will be expanded to "kubectl run --image=nginx test-pod -- custom-arg1" * name: getn command: get options: + name: output default: wide prependArgs: + node "kubectl getn control-plane-1" expands to "kubectl get node control-plane-1 --output=wide" "kubectl getn control-plane-1 --output=json" expands to "kubectl get node --output=json control-plane-1" | | `credentialPluginPolicy` [`CredentialPluginPolicy`](#kubectl-config-k8s-io-v1beta1-CredentialPluginPolicy) | credentialPluginPolicy specifies the policy governing which, if any, client-go credential plugins may be executed. It MUST be one of { "", "AllowAll", "DenyAll", "Allowlist" }. If the policy is "", then it falls back to "AllowAll" (this is required to maintain backward compatibility). If the policy is DenyAll, no credential plugins may run. If the policy is Allowlist, only those plugins meeting the criteria specified in the `credentialPluginAllowlist` field may run. | | `credentialPluginAllowlist` [`[]AllowlistEntry`](#kubectl-config-k8s-io-v1beta1-AllowlistEntry) | Allowlist is a slice of allowlist entries. If any of them is a match, then the executable in question may execute. That is, the result is the logical OR of all entries in the allowlist. This list MUST NOT be supplied if the policy is not "Allowlist". e.g. credentialPluginAllowlist: * name: cloud-provider-plugin * name: /usr/local/bin/my-plugin In the above example, the user allows the credential plugins `cloud-provider-plugin` (found somewhere in PATH), and the plugin found at the explicit path `/usr/local/bin/my-plugin`. | ## `AliasOverride` {#kubectl-config-k8s-io-v1beta1-AliasOverride} \*\*Appears in:\*\* - [Preference](#kubectl-config-k8s-io-v1beta1-Preference) AliasOverride stores the alias definitions. | Field | Description | | --- | --- | | `name` **[Required]** `string` | name is the name of alias that can only include alphabetical characters If the alias name conflicts with the built-in command, built-in command will be used. | | `command` **[Required]** `string` | command is the single or set of commands to execute, such as "set env" or "create" | | `prependArgs` **[Required]** `[]string` | prependArgs stores the arguments such as resource names, etc. These arguments are inserted after the alias name. | | `appendArgs` **[Required]** `[]string` | appendArgs stores the arguments such as resource names, etc. These arguments are appended to the USER\_ARGS. | | `options` **[Required]** [`[]CommandOptionDefault`](#kubectl-config-k8s-io-v1beta1-CommandOptionDefault) | options is allocated to store the option definitions of alias. options only modify the default value of the option and if user explicitly passes a value, explicit one is used. | ## `AllowlistEntry` {#kubectl-config-k8s-io-v1beta1-AllowlistEntry} \*\*Appears in:\*\* - [Preference](#kubectl-config-k8s-io-v1beta1-Preference) AllowlistEntry is an entry in the allowlist. For each allowlist item, at least one field must be nonempty. A struct with all empty fields is considered a misconfiguration error. Each field is a criterion for execution. If multiple fields are specified, then the criteria of all specified fields must be met. That is, the result of an
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kuberc.v1beta1.md
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0.056956
For each allowlist item, at least one field must be nonempty. A struct with all empty fields is considered a misconfiguration error. Each field is a criterion for execution. If multiple fields are specified, then the criteria of all specified fields must be met. That is, the result of an individual entry is the logical AND of all checks corresponding to the specified fields within the entry. | Field | Description | | --- | --- | | `name` **[Required]** `string` | Name matching is performed by first resolving the absolute path of both the plugin and the name in the allowlist entry using `exec.LookPath`. It will be called on both, and the resulting strings must be equal. If either call to `exec.LookPath` results in an error, the `Name` check will be considered a failure. | ## `CommandDefaults` {#kubectl-config-k8s-io-v1beta1-CommandDefaults} \*\*Appears in:\*\* - [Preference](#kubectl-config-k8s-io-v1beta1-Preference) CommandDefaults stores the commands and their associated option's default values. | Field | Description | | --- | --- | | `command` **[Required]** `string` | command refers to a command whose option's default value is changed. | | `options` **[Required]** [`[]CommandOptionDefault`](#kubectl-config-k8s-io-v1beta1-CommandOptionDefault) | options is a list of options storing different default values. | ## `CommandOptionDefault` {#kubectl-config-k8s-io-v1beta1-CommandOptionDefault} \*\*Appears in:\*\* - [AliasOverride](#kubectl-config-k8s-io-v1beta1-AliasOverride) - [CommandDefaults](#kubectl-config-k8s-io-v1beta1-CommandDefaults) CommandOptionDefault stores the name and the specified default value of an option. | Field | Description | | --- | --- | | `name` **[Required]** `string` | Option name (long form, without dashes). | | `default` **[Required]** `string` | In a string format of a default value. It will be parsed by kubectl to the compatible value of the option. | ## `CredentialPluginPolicy` {#kubectl-config-k8s-io-v1beta1-CredentialPluginPolicy} (Alias of `string`) \*\*Appears in:\*\* - [Preference](#kubectl-config-k8s-io-v1beta1-Preference) CredentialPluginPolicy specifies the policy governing which, if any, client-go credential plugins may be executed. It MUST be one of { "", "AllowAll", "DenyAll", "Allowlist" }. If the policy is "", then it falls back to "AllowAll" (this is required to maintain backward compatibility). If the policy is DenyAll, no credential plugins may run. If the policy is Allowlist, only those plugins meeting the criteria specified in the `credentialPluginAllowlist` field may run. If the policy is not `Allowlist` but one is provided, it is considered a configuration error.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/config-api/kuberc.v1beta1.md
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kubernetes
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0.101353
{{< feature-state feature\_gate\_name="ComponentSLIs" >}} By default, Kubernetes {{< skew currentVersion >}} publishes Service Level Indicator (SLI) metrics for each Kubernetes component binary. This metric endpoint is exposed on the serving HTTPS port of each component, at the path `/metrics/slis`. The `ComponentSLIs` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/) defaults to enabled for each Kubernetes component as of v1.27. ## SLI Metrics With SLI metrics enabled, each Kubernetes component exposes two metrics, labeled per healthcheck: - a gauge (which represents the current state of the healthcheck) - a counter (which records the cumulative counts observed for each healthcheck state) You can use the metric information to calculate per-component availability statistics. For example, the API server checks the health of etcd. You can work out and report how available or unavailable etcd has been - as reported by its client, the API server. The prometheus gauge data looks like this: ``` # HELP kubernetes\_healthcheck [ALPHA] This metric records the result of a single healthcheck. # TYPE kubernetes\_healthcheck gauge kubernetes\_healthcheck{name="autoregister-completion",type="healthz"} 1 kubernetes\_healthcheck{name="autoregister-completion",type="readyz"} 1 kubernetes\_healthcheck{name="etcd",type="healthz"} 1 kubernetes\_healthcheck{name="etcd",type="readyz"} 1 kubernetes\_healthcheck{name="etcd-readiness",type="readyz"} 1 kubernetes\_healthcheck{name="informer-sync",type="readyz"} 1 kubernetes\_healthcheck{name="log",type="healthz"} 1 kubernetes\_healthcheck{name="log",type="readyz"} 1 kubernetes\_healthcheck{name="ping",type="healthz"} 1 kubernetes\_healthcheck{name="ping",type="readyz"} 1 ``` While the counter data looks like this: ``` # HELP kubernetes\_healthchecks\_total [ALPHA] This metric records the results of all healthcheck. # TYPE kubernetes\_healthchecks\_total counter kubernetes\_healthchecks\_total{name="autoregister-completion",status="error",type="readyz"} 1 kubernetes\_healthchecks\_total{name="autoregister-completion",status="success",type="healthz"} 15 kubernetes\_healthchecks\_total{name="autoregister-completion",status="success",type="readyz"} 14 kubernetes\_healthchecks\_total{name="etcd",status="success",type="healthz"} 15 kubernetes\_healthchecks\_total{name="etcd",status="success",type="readyz"} 15 kubernetes\_healthchecks\_total{name="etcd-readiness",status="success",type="readyz"} 15 kubernetes\_healthchecks\_total{name="informer-sync",status="error",type="readyz"} 1 kubernetes\_healthchecks\_total{name="informer-sync",status="success",type="readyz"} 14 kubernetes\_healthchecks\_total{name="log",status="success",type="healthz"} 15 kubernetes\_healthchecks\_total{name="log",status="success",type="readyz"} 15 kubernetes\_healthchecks\_total{name="ping",status="success",type="healthz"} 15 kubernetes\_healthchecks\_total{name="ping",status="success",type="readyz"} 15 ``` ## Using this data The component SLIs metrics endpoint is intended to be scraped at a high frequency. Scraping at a high frequency means that you end up with greater granularity of the gauge's signal, which can be then used to calculate SLOs. The `/metrics/slis` endpoint provides the raw data necessary to calculate an availability SLO for the respective Kubernetes component.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/slis.md
main
kubernetes
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0.153559
{{< feature-state for\_k8s\_version="v1.23" state="alpha" >}} The [kubelet](/docs/reference/command-line-tools-reference/kubelet/) collects pod and container metrics via [cAdvisor](https://github.com/google/cadvisor). As an alpha feature, Kubernetes lets you configure the collection of pod and container metrics via the {{< glossary\_tooltip term\_id="cri" text="Container Runtime Interface">}} (CRI). You must enable the `PodAndContainerStatsFromCRI` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/) and use a compatible CRI implementation (containerd >= 1.6.0, CRI-O >= 1.23.0) to use the CRI based collection mechanism. ## CRI Pod & Container Metrics With `PodAndContainerStatsFromCRI` enabled, the kubelet polls the underlying container runtime for pod and container stats instead of inspecting the host system directly using cAdvisor. The benefits of relying on the container runtime for this information as opposed to direct collection with cAdvisor include: - Potential improved performance if the container runtime already collects this information during normal operations. In this case, the data can be re-used instead of being aggregated again by the kubelet. - It further decouples the kubelet and the container runtime allowing collection of metrics for container runtimes that don't run processes directly on the host with kubelet where they are observable by cAdvisor (for example: container runtimes that use virtualization).
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/cri-pod-container-metrics.md
main
kubernetes
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0.114545
{{< feature-state for\_k8s\_version="v1.32" state="alpha" >}} Kubernetes core components can expose a suite of \_z-endpoints\_ to make it easier for users to debug their cluster and its components. These endpoints are strictly to be used for human inspection to gain real time debugging information of a component binary. Avoid automated scraping of data returned by these endpoints; in Kubernetes {{< skew currentVersion >}} these are an \*\*alpha\*\* feature and the response format may change in future releases. ## z-pages Kubernetes v{{< skew currentVersion >}} allows you to enable \_z-pages\_ to help you troubleshoot problems with its core control plane components. These special debugging endpoints provide internal information about running components. For Kubernetes {{< skew currentVersion >}}, components serve the following endpoints (when enabled): - [z-pages](#z-pages) - [statusz](#statusz) - [statusz (structured)](#statusz-structured) - [flagz](#flagz) - [flagz (structured)](#flagz-structured) ### statusz Enabled using the `ComponentStatusz` [feature gate](/docs/reference/command-line-tools-reference/feature-gates#ComponentStatusz), the `/statusz` endpoint displays high level information about the component such as its Kubernetes version, emulation version, start time and more. The `/statusz` plain text response from the API server is similar to: ``` kube-apiserver statusz Warning: This endpoint is not meant to be machine parseable, has no formatting compatibility guarantees and is for debugging purposes only. Started: Wed Oct 16 21:03:43 UTC 2024 Up: 0 hr 00 min 16 sec Go version: go1.23.2 Binary version: 1.32.0-alpha.0.1484+5eeac4f21a491b-dirty Emulation version: 1.32.0-alpha.0.1484 Paths: /healthz /livez /metrics /readyz /statusz /version ``` #### statusz (structured) {{< feature-state feature\_gate\_name="ComponentStatusz" >}} Starting with Kubernetes v1.35, the `/statusz` endpoint supports a structured, versioned response format when requested with the appropriate `Accept` header. Without an `Accept` header, the endpoint returns the plain text response format by default. To request the structured response, use: ``` Accept: application/json;v=v1alpha1;g=config.k8s.io;as=Statusz ``` {{< note >}} If you request `application/json` without specifying all required parameters (`g`, `v`, and `as`), the server will respond with `406 Not Acceptable`. {{< /note >}} Example structured response: ```json { "kind": "Statusz", "apiVersion": "config.k8s.io/v1alpha1", "metadata": { "name": "kube-apiserver" }, "startTime": "2025-10-29T00:30:01Z", "uptimeSeconds": 856, "goVersion": "go1.23.2", "binaryVersion": "1.35.0", "emulationVersion": "1.35", "paths": [ "/healthz", "/livez", "/metrics", "/readyz", "/statusz", "/version" ] } ``` The `config.k8s.io/v1alpha1` schema for the structured `/statusz` response is as follows: ```go // Statusz is the config.k8s.io/v1alpha1 schema for the /statusz endpoint. type Statusz struct { // Kind is "Statusz". Kind string `json:"kind"` // APIVersion is the version of the object, e.g., "config.k8s.io/v1alpha1". APIVersion string `json:"apiVersion"` // Standard object's metadata. // +optional Metadata metav1.ObjectMeta `json:"metadata,omitempty"` // StartTime is the time the component process was initiated. StartTime metav1.Time `json:"startTime"` // UptimeSeconds is the duration in seconds for which the component has been running continuously. UptimeSeconds int64 `json:"uptimeSeconds"` // GoVersion is the version of the Go programming language used to build the binary. // The format is not guaranteed to be consistent across different Go builds. // +optional GoVersion string `json:"goVersion,omitempty"` // BinaryVersion is the version of the component's binary. // The format is not guaranteed to be semantic versioning and may be an arbitrary string. BinaryVersion string `json:"binaryVersion"` // EmulationVersion is the Kubernetes API version which this component is emulating. // if present, formatted as "." // +optional EmulationVersion string `json:"emulationVersion,omitempty"` // MinimumCompatibilityVersion is the minimum Kubernetes API version with which the component is designed to work. // if present, formatted as "." // +optional MinimumCompatibilityVersion string `json:"minimumCompatibilityVersion,omitempty"` // Paths contains relative URLs to other essential read-only endpoints for debugging and troubleshooting. // +optional Paths []string `json:"paths,omitempty"` } ``` ### flagz Enabled using the `ComponentFlagz` [feature gate](/docs/reference/command-line-tools-reference/feature-gates#ComponentFlagz), the `/flagz` endpoint shows you the command line arguments that were used to start a component. The `/flagz` plain text response from the API server looks something like: ``` kube-apiserver flags
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/zpages.md
main
kubernetes
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0.162407
for debugging and troubleshooting. // +optional Paths []string `json:"paths,omitempty"` } ``` ### flagz Enabled using the `ComponentFlagz` [feature gate](/docs/reference/command-line-tools-reference/feature-gates#ComponentFlagz), the `/flagz` endpoint shows you the command line arguments that were used to start a component. The `/flagz` plain text response from the API server looks something like: ``` kube-apiserver flags Warning: This endpoint is not meant to be machine parseable, has no formatting compatibility guarantees and is for debugging purposes only. advertise-address=192.168.8.2 contention-profiling=false enable-priority-and-fairness=true profiling=true authorization-mode=[Node,RBAC] authorization-webhook-cache-authorized-ttl=5m0s authorization-webhook-cache-unauthorized-ttl=30s authorization-webhook-version=v1beta1 default-watch-cache-size=100 ``` #### flagz (structured) {{< feature-state feature\_gate\_name="ComponentFlagz" >}} Starting with Kubernetes v1.35, the `/flagz` endpoint supports a structured, versioned response format when requested with the appropriate `Accept` header. Without an `Accept` header, the endpoint returns the plain text response format by default. To request the structured response, use: ``` Accept: application/json;v=v1alpha1;g=config.k8s.io;as=Flagz ``` {{< note >}} If you request `application/json` without specifying all required parameters (`g`, `v`, and `as`), the server will respond with `406 Not Acceptable`. {{< /note >}} Example structured response: ```json { "kind": "Flagz", "apiVersion": "config.k8s.io/v1alpha1", "metadata": { "name": "kube-apiserver" }, "flags": { "advertise-address": "192.168.8.4", "allow-privileged": "true", "anonymous-auth": "true", "authorization-mode": "[Node,RBAC]", "enable-priority-and-fairness": "true", "profiling": "true", "default-watch-cache-size": "100" } } ``` The `config.k8s.io/v1alpha1` schema for the structured `/flagz` response is as follows: ```go // Flagz is the config.k8s.io/v1alpha1 schema for the /flagz endpoint. type Flagz struct { // Kind is "Flagz". Kind string `json:"kind"` // APIVersion is the version of the object, e.g., "config.k8s.io/v1alpha1". APIVersion string `json:"apiVersion"` // Standard object's metadata. // +optional Metadata metav1.ObjectMeta `json:"metadata,omitempty"` // Flags contains the command-line flags and their values. // The keys are the flag names and the values are the flag values, // possibly with confidential values redacted. // +optional Flags map[string]string `json:"flags,omitempty"` } ``` {{< note >}} The structured responses for both `/statusz` and `/flagz` are alpha features in v1.35 and are subject to change in future releases. They are intended to provide machine-parseable output for debugging and introspection tools. {{< /note >}}
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/zpages.md
main
kubernetes
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0.038597
The [kubelet](/docs/reference/command-line-tools-reference/kubelet/) gathers metric statistics at the node, volume, pod and container level, and emits this information in the [Summary API](/docs/reference/config-api/kubelet-stats.v1alpha1/). You can send a proxied request to the stats summary API via the Kubernetes API server. Here is an example of a Summary API request for a node named `minikube`: ```shell kubectl get --raw "/api/v1/nodes/minikube/proxy/stats/summary" ``` Here is the same API call using `curl`: ```shell # You need to run "kubectl proxy" first # Change 8080 to the port that "kubectl proxy" assigns curl http://localhost:8080/api/v1/nodes/minikube/proxy/stats/summary ``` {{< note >}} Beginning with `metrics-server` 0.6.x, `metrics-server` queries the `/metrics/resource` kubelet endpoint, and not `/stats/summary`. {{< /note >}} ## Summary metrics API source {#summary-api-source} By default, Kubernetes fetches node summary metrics data using an embedded [cAdvisor](https://github.com/google/cadvisor) that runs within the kubelet. If you enable the `PodAndContainerStatsFromCRI` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/) in your cluster, and you use a container runtime that supports statistics access via {{< glossary\_tooltip term\_id="cri" text="Container Runtime Interface">}} (CRI), then the kubelet [fetches Pod- and container-level metric data using CRI](/docs/reference/instrumentation/cri-pod-container-metrics), and not via cAdvisor. ## Pressure Stall Information (PSI) {#psi} {{< feature-state for\_k8s\_version="v1.34" state="beta" >}} As a beta feature, Kubernetes lets you configure kubelet to collect Linux kernel [Pressure Stall Information](https://docs.kernel.org/accounting/psi.html) (PSI) for CPU, memory, and I/O usage. The information is collected at node, pod and container level. See [Summary API](/docs/reference/config-api/kubelet-stats.v1alpha1/) for detailed schema. This feature is enabled by default, by setting the `KubeletPSI` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/). The information is also exposed in [Prometheus metrics](/docs/concepts/cluster-administration/system-metrics#psi-metrics). You can learn how to interpret the PSI metrics in [Understand PSI Metrics](/docs/reference/instrumentation/understand-psi-metrics/). ### Requirements Pressure Stall Information requires: - [Linux kernel versions 4.20 or later](/docs/reference/node/kernel-version-requirements#requirements-psi). - [cgroup v2](/docs/concepts/architecture/cgroups) ## {{% heading "whatsnext" %}} The task pages for [Troubleshooting Clusters](/docs/tasks/debug/debug-cluster/) discuss how to use a metrics pipeline that rely on these data.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/node-metrics.md
main
kubernetes
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0.099731
## Metrics (v1.35) This page details the metrics that different Kubernetes components export. You can query the metrics endpoint for these components using an HTTP scrape, and fetch the current metrics data in Prometheus format. ### List of Stable Kubernetes Metrics Stable metrics observe strict API contracts and no labels can be added or removed from stable metrics during their lifetime. apiserver\_admission\_controller\_admission\_duration\_seconds Admission controller latency histogram in seconds, identified by name and broken out for each operation and API resource and type (validate or admit). * Stability Level:STABLE * Type: Histogram * Labels:nameoperationrejectedtype apiserver\_admission\_step\_admission\_duration\_seconds Admission sub-step latency histogram in seconds, broken out for each operation and API resource and step type (validate or admit). * Stability Level:STABLE * Type: Histogram * Labels:operationrejectedtype apiserver\_admission\_webhook\_admission\_duration\_seconds Admission webhook latency histogram in seconds, identified by name and broken out for each operation and API resource and type (validate or admit). * Stability Level:STABLE * Type: Histogram * Labels:nameoperationrejectedtype apiserver\_current\_inflight\_requests Maximal number of currently used inflight request limit of this apiserver per request kind in last second. * Stability Level:STABLE * Type: Gauge * Labels:request\_kind apiserver\_longrunning\_requests Gauge of all active long-running apiserver requests broken out by verb, group, version, resource, scope and component. Not all requests are tracked this way. * Stability Level:STABLE * Type: Gauge * Labels:componentgroupresourcescopesubresourceverbversion apiserver\_request\_duration\_seconds Response latency distribution in seconds for each verb, dry run value, group, version, resource, subresource, scope and component. * Stability Level:STABLE * Type: Histogram * Labels:componentdry\_rungroupresourcescopesubresourceverbversion apiserver\_request\_total Counter of apiserver requests broken out for each verb, dry run value, group, version, resource, scope, component, and HTTP response code. * Stability Level:STABLE * Type: Counter * Labels:codecomponentdry\_rungroupresourcescopesubresourceverbversion apiserver\_requested\_deprecated\_apis Gauge of deprecated APIs that have been requested, broken out by API group, version, resource, subresource, and removed\_release. * Stability Level:STABLE * Type: Gauge * Labels:groupremoved\_releaseresourcesubresourceversion apiserver\_response\_sizes Response size distribution in bytes for each group, version, verb, resource, subresource, scope and component. * Stability Level:STABLE * Type: Histogram * Labels:componentgroupresourcescopesubresourceverbversion apiserver\_storage\_objects [DEPRECATED, consider using apiserver\_resource\_objects instead] Number of stored objects at the time of last check split by kind. In case of a fetching error, the value will be -1. * Stability Level:STABLE * Type: Gauge * Labels:resource * Deprecated Versions:1.34.0 apiserver\_storage\_size\_bytes Size of the storage database file physically allocated in bytes. * Stability Level:STABLE * Type: Custom * Labels:storage\_cluster\_id container\_cpu\_usage\_seconds\_total Cumulative cpu time consumed by the container in core-seconds * Stability Level:STABLE * Type: Custom * Labels:containerpodnamespace container\_memory\_working\_set\_bytes Current working set of the container in bytes * Stability Level:STABLE * Type: Custom * Labels:containerpodnamespace container\_start\_time\_seconds Start time of the container since unix epoch in seconds * Stability Level:STABLE * Type: Custom * Labels:containerpodnamespace cronjob\_controller\_job\_creation\_skew\_duration\_seconds Time between when a cronjob is scheduled to be run, and when the corresponding job is created * Stability Level:STABLE * Type: Histogram job\_controller\_job\_pods\_finished\_total The number of finished Pods that are fully tracked * Stability Level:STABLE * Type: Counter * Labels:completion\_moderesult job\_controller\_job\_sync\_duration\_seconds The time it took to sync a job * Stability Level:STABLE * Type: Histogram * Labels:actioncompletion\_moderesult job\_controller\_job\_syncs\_total The number of job syncs * Stability Level:STABLE * Type: Counter * Labels:actioncompletion\_moderesult job\_controller\_jobs\_finished\_total The number of finished jobs * Stability Level:STABLE * Type: Counter * Labels:completion\_modereasonresult kube\_pod\_resource\_limit Resources limit for workloads on the cluster, broken down by pod. This shows the resource usage the scheduler and kubelet expect per pod for resources along with the unit for the resource if any. * Stability Level:STABLE * Type: Custom * Labels:namespacepodnodeschedulerpriorityresourceunit kube\_pod\_resource\_request Resources requested by workloads on the cluster, broken down by pod. This shows the resource usage the scheduler and kubelet expect per pod for resources along with the unit for the resource if any.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.193174
the unit for the resource if any. * Stability Level:STABLE * Type: Custom * Labels:namespacepodnodeschedulerpriorityresourceunit kube\_pod\_resource\_request Resources requested by workloads on the cluster, broken down by pod. This shows the resource usage the scheduler and kubelet expect per pod for resources along with the unit for the resource if any. * Stability Level:STABLE * Type: Custom * Labels:namespacepodnodeschedulerpriorityresourceunit kubernetes\_healthcheck This metric records the result of a single healthcheck. * Stability Level:STABLE * Type: Gauge * Labels:nametype kubernetes\_healthchecks\_total This metric records the results of all healthcheck. * Stability Level:STABLE * Type: Counter * Labels:namestatustype node\_collector\_evictions\_total Number of Node evictions that happened since current instance of NodeController started. * Stability Level:STABLE * Type: Counter * Labels:zone node\_cpu\_usage\_seconds\_total Cumulative cpu time consumed by the node in core-seconds * Stability Level:STABLE * Type: Custom node\_memory\_working\_set\_bytes Current working set of the node in bytes * Stability Level:STABLE * Type: Custom pod\_cpu\_usage\_seconds\_total Cumulative cpu time consumed by the pod in core-seconds * Stability Level:STABLE * Type: Custom * Labels:podnamespace pod\_memory\_working\_set\_bytes Current working set of the pod in bytes * Stability Level:STABLE * Type: Custom * Labels:podnamespace resource\_scrape\_error 1 if there was an error while getting container metrics, 0 otherwise * Stability Level:STABLE * Type: Custom scheduler\_framework\_extension\_point\_duration\_seconds Latency for running all plugins of a specific extension point. * Stability Level:STABLE * Type: Histogram * Labels:extension\_pointprofilestatus scheduler\_pending\_pods Number of pending pods, by the queue type. 'active' means number of pods in activeQ; 'backoff' means number of pods in backoffQ; 'unschedulable' means number of pods in unschedulablePods that the scheduler attempted to schedule and failed; 'gated' is the number of unschedulable pods that the scheduler never attempted to schedule because they are gated. * Stability Level:STABLE * Type: Gauge * Labels:queue scheduler\_pod\_scheduling\_attempts Number of attempts to successfully schedule a pod. * Stability Level:STABLE * Type: Histogram scheduler\_preemption\_attempts\_total Total preemption attempts in the cluster till now * Stability Level:STABLE * Type: Counter scheduler\_preemption\_victims Number of selected preemption victims * Stability Level:STABLE * Type: Histogram scheduler\_queue\_incoming\_pods\_total Number of pods added to scheduling queues by event and queue type. * Stability Level:STABLE * Type: Counter * Labels:eventqueue scheduler\_schedule\_attempts\_total Number of attempts to schedule pods, by the result. 'unschedulable' means a pod could not be scheduled, while 'error' means an internal scheduler problem. * Stability Level:STABLE * Type: Counter * Labels:profileresult scheduler\_scheduling\_attempt\_duration\_seconds Scheduling attempt latency in seconds (scheduling algorithm + binding) * Stability Level:STABLE * Type: Histogram * Labels:profileresult ### List of Beta Kubernetes Metrics Beta metrics observe a looser API contract than its stable counterparts. No labels can be removed from beta metrics during their lifetime, however, labels can be added while the metric is in the beta stage. This offers the assurance that beta metrics will honor existing dashboards and alerts, while allowing for amendments in the future. apiserver\_authentication\_config\_controller\_automatic\_reload\_last\_timestamp\_seconds Timestamp of the last automatic reload of authentication configuration split by status and apiserver identity. * Stability Level:BETA * Type: Gauge * Labels:apiserver\_id\_hashstatus apiserver\_authentication\_config\_controller\_automatic\_reloads\_total Total number of automatic reloads of authentication configuration split by status and apiserver identity. * Stability Level:BETA * Type: Counter * Labels:apiserver\_id\_hashstatus apiserver\_authorization\_config\_controller\_automatic\_reload\_last\_timestamp\_seconds Timestamp of the last automatic reload of authorization configuration split by status and apiserver identity. * Stability Level:BETA * Type: Gauge * Labels:apiserver\_id\_hashstatus apiserver\_authorization\_config\_controller\_automatic\_reloads\_total Total number of automatic reloads of authorization configuration split by status and apiserver identity. * Stability Level:BETA * Type: Counter * Labels:apiserver\_id\_hashstatus apiserver\_cel\_compilation\_duration\_seconds CEL compilation time in seconds. * Stability Level:BETA * Type: Histogram apiserver\_cel\_evaluation\_duration\_seconds CEL evaluation time in seconds. * Stability Level:BETA * Type: Histogram apiserver\_flowcontrol\_current\_executing\_requests Number of requests in initial (for a WATCH) or any (for a non-WATCH) execution stage in the API Priority and Fairness subsystem * Stability
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.232194
Labels:apiserver\_id\_hashstatus apiserver\_cel\_compilation\_duration\_seconds CEL compilation time in seconds. * Stability Level:BETA * Type: Histogram apiserver\_cel\_evaluation\_duration\_seconds CEL evaluation time in seconds. * Stability Level:BETA * Type: Histogram apiserver\_flowcontrol\_current\_executing\_requests Number of requests in initial (for a WATCH) or any (for a non-WATCH) execution stage in the API Priority and Fairness subsystem * Stability Level:BETA * Type: Gauge * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_current\_executing\_seats Concurrency (number of seats) occupied by the currently executing (initial stage for a WATCH, any stage otherwise) requests in the API Priority and Fairness subsystem * Stability Level:BETA * Type: Gauge * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_current\_inqueue\_requests Number of requests currently pending in queues of the API Priority and Fairness subsystem * Stability Level:BETA * Type: Gauge * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_dispatched\_requests\_total Number of requests executed by API Priority and Fairness subsystem * Stability Level:BETA * Type: Counter * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_nominal\_limit\_seats Nominal number of execution seats configured for each priority level * Stability Level:BETA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_rejected\_requests\_total Number of requests rejected by API Priority and Fairness subsystem * Stability Level:BETA * Type: Counter * Labels:flow\_schemapriority\_levelreason apiserver\_flowcontrol\_request\_wait\_duration\_seconds Length of time a request spent waiting in its queue * Stability Level:BETA * Type: Histogram * Labels:executeflow\_schemapriority\_level apiserver\_validating\_admission\_policy\_check\_duration\_seconds Validation admission latency for individual validation expressions in seconds, labeled by policy and further including binding and enforcement action taken. * Stability Level:BETA * Type: Histogram * Labels:enforcement\_actionerror\_typepolicypolicy\_binding apiserver\_validating\_admission\_policy\_check\_total Validation admission policy check total, labeled by policy and further identified by binding and enforcement action taken. * Stability Level:BETA * Type: Counter * Labels:enforcement\_actionerror\_typepolicypolicy\_binding apiserver\_validation\_declarative\_validation\_mismatch\_total Number of times declarative validation results differed from handwritten validation results for core types. * Stability Level:BETA * Type: Counter apiserver\_validation\_declarative\_validation\_panic\_total Number of times declarative validation has panicked during validation. * Stability Level:BETA * Type: Counter disabled\_metrics\_total The count of disabled metrics. * Stability Level:BETA * Type: Counter hidden\_metrics\_total The count of hidden metrics. * Stability Level:BETA * Type: Counter kubelet\_image\_volume\_mounted\_errors\_total Number of failed image volume mounts. * Stability Level:BETA * Type: Counter kubelet\_image\_volume\_mounted\_succeed\_total Number of successful image volume mounts. * Stability Level:BETA * Type: Counter kubelet\_image\_volume\_requested\_total Number of requested image volumes. * Stability Level:BETA * Type: Counter kubernetes\_feature\_enabled This metric records the data about the stage and enablement of a k8s feature. * Stability Level:BETA * Type: Gauge * Labels:namestage prober\_probe\_total Cumulative number of a liveness, readiness or startup probe for a container by result. * Stability Level:BETA * Type: Counter * Labels:containernamespacepodpod\_uidprobe\_typeresult registered\_metrics\_total The count of registered metrics broken by stability level and deprecation version. * Stability Level:BETA * Type: Counter * Labels:deprecated\_versionstability\_level scheduler\_pod\_scheduling\_sli\_duration\_seconds E2e latency for a pod being scheduled, from the time the pod enters the scheduling queue and might involve multiple scheduling attempts. * Stability Level:BETA * Type: Histogram * Labels:attempts ### List of Alpha Kubernetes Metrics Alpha metrics do not have any API guarantees. These metrics must be used at your own risk, subsequent versions of Kubernetes may remove these metrics altogether, or mutate the API in such a way that breaks existing dashboards and alerts. aggregator\_discovery\_aggregation\_count\_total Counter of number of times discovery was aggregated * Stability Level:ALPHA * Type: Counter aggregator\_discovery\_nopeer\_requests\_total Counter of number of times no-peer (non peer-aggregated) discovery was requested * Stability Level:ALPHA * Type: Counter aggregator\_discovery\_peer\_aggregated\_cache\_hits\_total Counter of number of times discovery was served from peer-aggregated cache * Stability Level:ALPHA * Type: Counter aggregator\_discovery\_peer\_aggregated\_cache\_misses\_total Counter of number of times discovery was aggregated across all API servers * Stability Level:ALPHA * Type: Counter aggregator\_openapi\_v2\_regeneration\_count Counter of OpenAPI v2 spec regeneration count broken down by causing APIService name and reason. * Stability Level:ALPHA * Type: Counter * Labels:apiservicereason aggregator\_openapi\_v2\_regeneration\_duration Gauge of OpenAPI v2 spec regeneration duration in seconds. * Stability Level:ALPHA * Type: Gauge * Labels:reason aggregator\_unavailable\_apiservice
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.225412
servers * Stability Level:ALPHA * Type: Counter aggregator\_openapi\_v2\_regeneration\_count Counter of OpenAPI v2 spec regeneration count broken down by causing APIService name and reason. * Stability Level:ALPHA * Type: Counter * Labels:apiservicereason aggregator\_openapi\_v2\_regeneration\_duration Gauge of OpenAPI v2 spec regeneration duration in seconds. * Stability Level:ALPHA * Type: Gauge * Labels:reason aggregator\_unavailable\_apiservice Gauge of APIServices which are marked as unavailable broken down by APIService name. * Stability Level:ALPHA * Type: Custom * Labels:name aggregator\_unavailable\_apiservice\_total Counter of APIServices which are marked as unavailable broken down by APIService name and reason. * Stability Level:ALPHA * Type: Counter * Labels:namereason apiextensions\_apiserver\_validation\_ratcheting\_seconds Time for comparison of old to new for the purposes of CRDValidationRatcheting during an UPDATE in seconds. * Stability Level:ALPHA * Type: Histogram apiextensions\_openapi\_v2\_regeneration\_count Counter of OpenAPI v2 spec regeneration count broken down by causing CRD name and reason. * Stability Level:ALPHA * Type: Counter * Labels:crdreason apiextensions\_openapi\_v3\_regeneration\_count Counter of OpenAPI v3 spec regeneration count broken down by group, version, causing CRD and reason. * Stability Level:ALPHA * Type: Counter * Labels:crdgroupreasonversion apiserver\_admission\_match\_condition\_evaluation\_errors\_total Admission match condition evaluation errors count, identified by name of resource containing the match condition and broken out for each kind containing matchConditions (webhook or policy), operation and admission type (validate or admit). * Stability Level:ALPHA * Type: Counter * Labels:kindnameoperationtype apiserver\_admission\_match\_condition\_evaluation\_seconds Admission match condition evaluation time in seconds, identified by name and broken out for each kind containing matchConditions (webhook or policy), operation and type (validate or admit). * Stability Level:ALPHA * Type: Histogram * Labels:kindnameoperationtype apiserver\_admission\_match\_condition\_exclusions\_total Admission match condition evaluation exclusions count, identified by name of resource containing the match condition and broken out for each kind containing matchConditions (webhook or policy), operation and admission type (validate or admit). * Stability Level:ALPHA * Type: Counter * Labels:kindnameoperationtype apiserver\_admission\_step\_admission\_duration\_seconds\_summary Admission sub-step latency summary in seconds, broken out for each operation and API resource and step type (validate or admit). * Stability Level:ALPHA * Type: Summary * Labels:operationrejectedtype apiserver\_admission\_webhook\_fail\_open\_count Admission webhook fail open count, identified by name and broken out for each admission type (validating or admit). * Stability Level:ALPHA * Type: Counter * Labels:nametype apiserver\_admission\_webhook\_rejection\_count Admission webhook rejection count, identified by name and broken out for each admission type (validating or admit) and operation. Additional labels specify an error type (calling\_webhook\_error or apiserver\_internal\_error if an error occurred; no\_error otherwise) and optionally a non-zero rejection code if the webhook rejects the request with an HTTP status code (honored by the apiserver when the code is greater or equal to 400). Codes greater than 600 are truncated to 600, to keep the metrics cardinality bounded. * Stability Level:ALPHA * Type: Counter * Labels:error\_typenameoperationrejection\_codetype apiserver\_admission\_webhook\_request\_total Admission webhook request total, identified by name and broken out for each admission type (validating or admit) and operation. Additional labels specify whether the request was rejected or not and an HTTP status code. Codes greater than 600 are truncated to 600, to keep the metrics cardinality bounded. * Stability Level:ALPHA * Type: Counter * Labels:codenameoperationrejectedtype apiserver\_audit\_error\_total Counter of audit events that failed to be audited properly. Plugin identifies the plugin affected by the error. * Stability Level:ALPHA * Type: Counter * Labels:plugin apiserver\_audit\_event\_total Counter of audit events generated and sent to the audit backend. * Stability Level:ALPHA * Type: Counter apiserver\_audit\_level\_total Counter of policy levels for audit events (1 per request). * Stability Level:ALPHA * Type: Counter * Labels:level apiserver\_audit\_requests\_rejected\_total Counter of apiserver requests rejected due to an error in audit logging backend. * Stability Level:ALPHA * Type: Counter apiserver\_authentication\_config\_controller\_last\_config\_info Information about the last applied authentication configuration with hash as label, split by apiserver identity. * Stability Level:ALPHA * Type: Custom * Labels:apiserver\_id\_hashhash apiserver\_authentication\_jwt\_authenticator\_jwks\_fetch\_last\_key\_set\_info Information about the
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.174803
* Labels:level apiserver\_audit\_requests\_rejected\_total Counter of apiserver requests rejected due to an error in audit logging backend. * Stability Level:ALPHA * Type: Counter apiserver\_authentication\_config\_controller\_last\_config\_info Information about the last applied authentication configuration with hash as label, split by apiserver identity. * Stability Level:ALPHA * Type: Custom * Labels:apiserver\_id\_hashhash apiserver\_authentication\_jwt\_authenticator\_jwks\_fetch\_last\_key\_set\_info Information about the last JWKS fetched by the JWT authenticator with hash as label, split by api server identity and jwt issuer. * Stability Level:ALPHA * Type: Custom * Labels:jwt\_issuer\_hashapiserver\_id\_hashhash apiserver\_authentication\_jwt\_authenticator\_jwks\_fetch\_last\_timestamp\_seconds Timestamp of the last successful or failed JWKS fetch split by result, api server identity and jwt issuer for the JWT authenticator. * Stability Level:ALPHA * Type: Gauge * Labels:apiserver\_id\_hashjwt\_issuer\_hashresult apiserver\_authentication\_jwt\_authenticator\_latency\_seconds Latency of jwt authentication operations in seconds. This is the time spent authenticating a token for cache miss only (i.e. when the token is not found in the cache). * Stability Level:ALPHA * Type: Histogram * Labels:jwt\_issuer\_hashresult apiserver\_authorization\_config\_controller\_last\_config\_info Information about the last applied authorization configuration with hash as label, split by apiserver identity. * Stability Level:ALPHA * Type: Custom * Labels:apiserver\_id\_hashhash apiserver\_authorization\_decisions\_total Total number of terminal decisions made by an authorizer split by authorizer type, name, and decision. * Stability Level:ALPHA * Type: Counter * Labels:decisionnametype apiserver\_authorization\_match\_condition\_evaluation\_errors\_total Total number of errors when an authorization webhook encounters a match condition error split by authorizer type and name. * Stability Level:ALPHA * Type: Counter * Labels:nametype apiserver\_authorization\_match\_condition\_evaluation\_seconds Authorization match condition evaluation time in seconds, split by authorizer type and name. * Stability Level:ALPHA * Type: Histogram * Labels:nametype apiserver\_authorization\_match\_condition\_exclusions\_total Total number of exclusions when an authorization webhook is skipped because match conditions exclude it. * Stability Level:ALPHA * Type: Counter * Labels:nametype apiserver\_authorization\_webhook\_duration\_seconds Request latency in seconds. * Stability Level:ALPHA * Type: Histogram * Labels:nameresult apiserver\_authorization\_webhook\_evaluations\_fail\_open\_total NoOpinion results due to webhook timeout or error. * Stability Level:ALPHA * Type: Counter * Labels:nameresult apiserver\_authorization\_webhook\_evaluations\_total Round-trips to authorization webhooks. * Stability Level:ALPHA * Type: Counter * Labels:nameresult apiserver\_cache\_list\_fetched\_objects\_total Number of objects read from watch cache in the course of serving a LIST request * Stability Level:ALPHA * Type: Counter * Labels:groupindexresource apiserver\_cache\_list\_returned\_objects\_total Number of objects returned for a LIST request from watch cache * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_cache\_list\_total Number of LIST requests served from watch cache * Stability Level:ALPHA * Type: Counter * Labels:groupindexresource apiserver\_certificates\_registry\_csr\_honored\_duration\_total Total number of issued CSRs with a requested duration that was honored, sliced by signer (only kubernetes.io signer names are specifically identified) * Stability Level:ALPHA * Type: Counter * Labels:signerName apiserver\_certificates\_registry\_csr\_requested\_duration\_total Total number of issued CSRs with a requested duration, sliced by signer (only kubernetes.io signer names are specifically identified) * Stability Level:ALPHA * Type: Counter * Labels:signerName apiserver\_client\_certificate\_expiration\_seconds Distribution of the remaining lifetime on the certificate used to authenticate a request. * Stability Level:ALPHA * Type: Histogram apiserver\_clusterip\_repair\_ip\_errors\_total Number of errors detected on clusterips by the repair loop broken down by type of error: leak, repair, full, outOfRange, duplicate, unknown, invalid * Stability Level:ALPHA * Type: Counter * Labels:type apiserver\_clusterip\_repair\_reconcile\_errors\_total Number of reconciliation failures on the clusterip repair reconcile loop * Stability Level:ALPHA * Type: Counter apiserver\_conversion\_webhook\_duration\_seconds Conversion webhook request latency * Stability Level:ALPHA * Type: Histogram * Labels:failure\_typeresult apiserver\_conversion\_webhook\_request\_total Counter for conversion webhook requests with success/failure and failure error type * Stability Level:ALPHA * Type: Counter * Labels:failure\_typeresult apiserver\_crd\_conversion\_webhook\_duration\_seconds CRD webhook conversion duration in seconds * Stability Level:ALPHA * Type: Histogram * Labels:crd\_namefrom\_versionsucceededto\_version apiserver\_current\_inqueue\_requests Maximal number of queued requests in this apiserver per request kind in last second. * Stability Level:ALPHA * Type: Gauge * Labels:request\_kind apiserver\_delegated\_authn\_request\_duration\_seconds Request latency in seconds. Broken down by status code. * Stability Level:ALPHA * Type: Histogram * Labels:code apiserver\_delegated\_authn\_request\_total Number of HTTP requests partitioned by status code. *
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.09681
Maximal number of queued requests in this apiserver per request kind in last second. * Stability Level:ALPHA * Type: Gauge * Labels:request\_kind apiserver\_delegated\_authn\_request\_duration\_seconds Request latency in seconds. Broken down by status code. * Stability Level:ALPHA * Type: Histogram * Labels:code apiserver\_delegated\_authn\_request\_total Number of HTTP requests partitioned by status code. * Stability Level:ALPHA * Type: Counter * Labels:code apiserver\_delegated\_authz\_request\_duration\_seconds Request latency in seconds. Broken down by status code. * Stability Level:ALPHA * Type: Histogram * Labels:code apiserver\_delegated\_authz\_request\_total Number of HTTP requests partitioned by status code. * Stability Level:ALPHA * Type: Counter * Labels:code apiserver\_egress\_dialer\_dial\_duration\_seconds Dial latency histogram in seconds, labeled by the protocol (http-connect or grpc), transport (tcp or uds) * Stability Level:ALPHA * Type: Histogram * Labels:protocoltransport apiserver\_egress\_dialer\_dial\_failure\_count Dial failure count, labeled by the protocol (http-connect or grpc), transport (tcp or uds), and stage (connect or proxy). The stage indicates at which stage the dial failed * Stability Level:ALPHA * Type: Counter * Labels:protocolstagetransport apiserver\_egress\_dialer\_dial\_start\_total Dial starts, labeled by the protocol (http-connect or grpc) and transport (tcp or uds). * Stability Level:ALPHA * Type: Counter * Labels:protocoltransport apiserver\_encryption\_config\_controller\_automatic\_reload\_last\_timestamp\_seconds Timestamp of the last successful or failed automatic reload of encryption configuration split by apiserver identity. * Stability Level:ALPHA * Type: Gauge * Labels:apiserver\_id\_hashstatus apiserver\_encryption\_config\_controller\_automatic\_reloads\_total Total number of reload successes and failures of encryption configuration split by apiserver identity. * Stability Level:ALPHA * Type: Counter * Labels:apiserver\_id\_hashstatus apiserver\_encryption\_config\_controller\_last\_config\_info Information about the last applied encryption configuration with hash as label, split by apiserver identity. * Stability Level:ALPHA * Type: Custom * Labels:apiserver\_id\_hashhash apiserver\_envelope\_encryption\_dek\_cache\_fill\_percent Percent of the cache slots currently occupied by cached DEKs. * Stability Level:ALPHA * Type: Gauge apiserver\_envelope\_encryption\_dek\_cache\_inter\_arrival\_time\_seconds Time (in seconds) of inter arrival of transformation requests. * Stability Level:ALPHA * Type: Histogram * Labels:transformation\_type apiserver\_envelope\_encryption\_dek\_source\_cache\_size Number of records in data encryption key (DEK) source cache. On a restart, this value is an approximation of the number of decrypt RPC calls the server will make to the KMS plugin. * Stability Level:ALPHA * Type: Gauge * Labels:provider\_name apiserver\_envelope\_encryption\_invalid\_key\_id\_from\_status\_total Number of times an invalid keyID is returned by the Status RPC call split by error. * Stability Level:ALPHA * Type: Counter * Labels:errorprovider\_name apiserver\_envelope\_encryption\_key\_id\_hash\_last\_timestamp\_seconds The last time in seconds when a keyID was used. * Stability Level:ALPHA * Type: Gauge * Labels:apiserver\_id\_hashkey\_id\_hashprovider\_nametransformation\_type apiserver\_envelope\_encryption\_key\_id\_hash\_status\_last\_timestamp\_seconds The last time in seconds when a keyID was returned by the Status RPC call. * Stability Level:ALPHA * Type: Gauge * Labels:apiserver\_id\_hashkey\_id\_hashprovider\_name apiserver\_envelope\_encryption\_key\_id\_hash\_total Number of times a keyID is used split by transformation type, provider, and apiserver identity. * Stability Level:ALPHA * Type: Counter * Labels:apiserver\_id\_hashkey\_id\_hashprovider\_nametransformation\_type apiserver\_envelope\_encryption\_kms\_operations\_latency\_seconds KMS operation duration with gRPC error code status total. * Stability Level:ALPHA * Type: Histogram * Labels:grpc\_status\_codemethod\_nameprovider\_name apiserver\_externaljwt\_fetch\_keys\_data\_timestamp Unix Timestamp in seconds of the last successful FetchKeys data\_timestamp value returned by the external signer * Stability Level:ALPHA * Type: Gauge apiserver\_externaljwt\_fetch\_keys\_request\_total Total attempts at syncing supported JWKs * Stability Level:ALPHA * Type: Counter * Labels:code apiserver\_externaljwt\_fetch\_keys\_success\_timestamp Unix Timestamp in seconds of the last successful FetchKeys request * Stability Level:ALPHA * Type: Gauge apiserver\_externaljwt\_request\_duration\_seconds Request duration and time for calls to external-jwt-signer * Stability Level:ALPHA * Type: Histogram * Labels:codemethod apiserver\_externaljwt\_sign\_request\_total Total attempts at signing JWT * Stability Level:ALPHA * Type: Counter * Labels:code apiserver\_flowcontrol\_current\_inqueue\_seats Number of seats currently pending in queues of the API Priority and Fairness subsystem * Stability Level:ALPHA * Type: Gauge * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_current\_limit\_seats current derived number of execution seats available to each priority level * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_current\_r R(time of last change) * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_demand\_seats Observations, at the end of every nanosecond, of (the number of seats each priority level could use) / (nominal number of
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.121491
execution seats available to each priority level * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_current\_r R(time of last change) * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_demand\_seats Observations, at the end of every nanosecond, of (the number of seats each priority level could use) / (nominal number of seats for that level) * Stability Level:ALPHA * Type: TimingRatioHistogram * Labels:priority\_level apiserver\_flowcontrol\_demand\_seats\_average Time-weighted average, over last adjustment period, of demand\_seats * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_demand\_seats\_high\_watermark High watermark, over last adjustment period, of demand\_seats * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_demand\_seats\_smoothed Smoothed seat demands * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_demand\_seats\_stdev Time-weighted standard deviation, over last adjustment period, of demand\_seats * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_dispatch\_r R(time of last dispatch) * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_epoch\_advance\_total Number of times the queueset's progress meter jumped backward * Stability Level:ALPHA * Type: Counter * Labels:priority\_levelsuccess apiserver\_flowcontrol\_latest\_s S(most recently dispatched request) * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_lower\_limit\_seats Configured lower bound on number of execution seats available to each priority level * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_next\_discounted\_s\_bounds min and max, over queues, of S(oldest waiting request in queue) - estimated work in progress * Stability Level:ALPHA * Type: Gauge * Labels:boundpriority\_level apiserver\_flowcontrol\_next\_s\_bounds min and max, over queues, of S(oldest waiting request in queue) * Stability Level:ALPHA * Type: Gauge * Labels:boundpriority\_level apiserver\_flowcontrol\_priority\_level\_request\_utilization Observations, at the end of every nanosecond, of number of requests (as a fraction of the relevant limit) waiting or in any stage of execution (but only initial stage for WATCHes) * Stability Level:ALPHA * Type: TimingRatioHistogram * Labels:phasepriority\_level apiserver\_flowcontrol\_priority\_level\_seat\_utilization Observations, at the end of every nanosecond, of utilization of seats for any stage of execution (but only initial stage for WATCHes) * Stability Level:ALPHA * Type: TimingRatioHistogram * Labels:priority\_level * Const Labels:phase:executing apiserver\_flowcontrol\_read\_vs\_write\_current\_requests Observations, at the end of every nanosecond, of the number of requests (as a fraction of the relevant limit) waiting or in regular stage of execution * Stability Level:ALPHA * Type: TimingRatioHistogram * Labels:phaserequest\_kind apiserver\_flowcontrol\_request\_concurrency\_in\_use Concurrency (number of seats) occupied by the currently executing (initial stage for a WATCH, any stage otherwise) requests in the API Priority and Fairness subsystem * Stability Level:ALPHA * Type: Gauge * Labels:flow\_schemapriority\_level * Deprecated Versions:1.31.0 apiserver\_flowcontrol\_request\_concurrency\_limit Nominal number of execution seats configured for each priority level * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level * Deprecated Versions:1.30.0 apiserver\_flowcontrol\_request\_dispatch\_no\_accommodation\_total Number of times a dispatch attempt resulted in a non accommodation due to lack of available seats * Stability Level:ALPHA * Type: Counter * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_request\_execution\_seconds Duration of initial stage (for a WATCH) or any (for a non-WATCH) stage of request execution in the API Priority and Fairness subsystem * Stability Level:ALPHA * Type: Histogram * Labels:flow\_schemapriority\_leveltype apiserver\_flowcontrol\_request\_queue\_length\_after\_enqueue Length of queue in the API Priority and Fairness subsystem, as seen by each request after it is enqueued * Stability Level:ALPHA * Type: Histogram * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_seat\_fair\_frac Fair fraction of server's concurrency to allocate to each priority level that can use it * Stability Level:ALPHA * Type: Gauge apiserver\_flowcontrol\_target\_seats Seat allocation targets * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_upper\_limit\_seats Configured upper bound on number of execution seats available to each priority level * Stability Level:ALPHA * Type: Gauge * Labels:priority\_level apiserver\_flowcontrol\_watch\_count\_samples count of watchers for mutating requests in API Priority and Fairness * Stability Level:ALPHA * Type: Histogram * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_work\_estimated\_seats Number of estimated seats (maximum of initial and final seats) associated with requests in API Priority and Fairness * Stability Level:ALPHA * Type: Histogram * Labels:flow\_schemapriority\_level apiserver\_init\_events\_total Counter of init events processed
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.215097
watchers for mutating requests in API Priority and Fairness * Stability Level:ALPHA * Type: Histogram * Labels:flow\_schemapriority\_level apiserver\_flowcontrol\_work\_estimated\_seats Number of estimated seats (maximum of initial and final seats) associated with requests in API Priority and Fairness * Stability Level:ALPHA * Type: Histogram * Labels:flow\_schemapriority\_level apiserver\_init\_events\_total Counter of init events processed in watch cache broken by resource type. * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_kube\_aggregator\_x509\_insecure\_sha1\_total Counts the number of requests to servers with insecure SHA1 signatures in their serving certificate OR the number of connection failures due to the insecure SHA1 signatures (either/or, based on the runtime environment) * Stability Level:ALPHA * Type: Counter apiserver\_kube\_aggregator\_x509\_missing\_san\_total Counts the number of requests to servers missing SAN extension in their serving certificate OR the number of connection failures due to the lack of x509 certificate SAN extension missing (either/or, based on the runtime environment) * Stability Level:ALPHA * Type: Counter apiserver\_mutating\_admission\_policy\_check\_duration\_seconds Mutation admission latency for individual mutation expressions in seconds, labeled by policy and binding. * Stability Level:ALPHA * Type: Histogram * Labels:error\_typepolicypolicy\_binding apiserver\_mutating\_admission\_policy\_check\_total Mutation admission policy check total, labeled by policy and further identified by binding. * Stability Level:ALPHA * Type: Counter * Labels:error\_typepolicypolicy\_binding apiserver\_nodeport\_repair\_port\_errors\_total Number of errors detected on ports by the repair loop broken down by type of error: leak, repair, full, outOfRange, duplicate, unknown * Stability Level:ALPHA * Type: Counter * Labels:type apiserver\_nodeport\_repair\_reconcile\_errors\_total Number of reconciliation failures on the nodeport repair reconcile loop * Stability Level:ALPHA * Type: Counter apiserver\_request\_aborts\_total Number of requests which apiserver aborted possibly due to a timeout, for each group, version, verb, resource, subresource and scope * Stability Level:ALPHA * Type: Counter * Labels:groupresourcescopesubresourceverbversion apiserver\_request\_body\_size\_bytes Apiserver request body size in bytes broken out by resource and verb. * Stability Level:ALPHA * Type: Histogram * Labels:groupresourceverb apiserver\_request\_filter\_duration\_seconds Request filter latency distribution in seconds, for each filter type * Stability Level:ALPHA * Type: Histogram * Labels:filter apiserver\_request\_post\_timeout\_total Tracks the activity of the request handlers after the associated requests have been timed out by the apiserver * Stability Level:ALPHA * Type: Counter * Labels:sourcestatus apiserver\_request\_sli\_duration\_seconds Response latency distribution (not counting webhook duration and priority & fairness queue wait times) in seconds for each verb, group, version, resource, subresource, scope and component. * Stability Level:ALPHA * Type: Histogram * Labels:componentgroupresourcescopesubresourceverbversion apiserver\_request\_slo\_duration\_seconds Response latency distribution (not counting webhook duration and priority & fairness queue wait times) in seconds for each verb, group, version, resource, subresource, scope and component. * Stability Level:ALPHA * Type: Histogram * Labels:componentgroupresourcescopesubresourceverbversion * Deprecated Versions:1.27.0 apiserver\_request\_terminations\_total Number of requests which apiserver terminated in self-defense. * Stability Level:ALPHA * Type: Counter * Labels:codecomponentgroupresourcescopesubresourceverbversion apiserver\_request\_timestamp\_comparison\_time Time taken for comparison of old vs new objects in UPDATE or PATCH requests * Stability Level:ALPHA * Type: Histogram * Labels:code\_path apiserver\_rerouted\_request\_total Total number of requests that were proxied to a peer kube apiserver because the local apiserver was not capable of serving it * Stability Level:ALPHA * Type: Counter * Labels:code apiserver\_resource\_objects Number of stored objects at the time of last check split by kind. In case of a fetching error, the value will be -1. * Stability Level:ALPHA * Type: Gauge * Labels:groupresource apiserver\_resource\_size\_estimate\_bytes Estimated size of stored objects in database. Estimate is based on sum of last observed sizes of serialized objects. In case of a fetching error, the value will be -1. * Stability Level:ALPHA * Type: Gauge * Labels:groupresource apiserver\_selfrequest\_total Counter of apiserver self-requests broken out for each verb, API resource and subresource. * Stability Level:ALPHA * Type: Counter * Labels:groupresourcesubresourceverb apiserver\_storage\_consistency\_checks\_total Counter for status of consistency checks between etcd and watch cache * Stability Level:ALPHA * Type: Counter * Labels:groupresourcestatus apiserver\_storage\_data\_key\_generation\_duration\_seconds Latencies in seconds of
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.224475
Gauge * Labels:groupresource apiserver\_selfrequest\_total Counter of apiserver self-requests broken out for each verb, API resource and subresource. * Stability Level:ALPHA * Type: Counter * Labels:groupresourcesubresourceverb apiserver\_storage\_consistency\_checks\_total Counter for status of consistency checks between etcd and watch cache * Stability Level:ALPHA * Type: Counter * Labels:groupresourcestatus apiserver\_storage\_data\_key\_generation\_duration\_seconds Latencies in seconds of data encryption key(DEK) generation operations. * Stability Level:ALPHA * Type: Histogram apiserver\_storage\_data\_key\_generation\_failures\_total Total number of failed data encryption key(DEK) generation operations. * Stability Level:ALPHA * Type: Counter apiserver\_storage\_db\_total\_size\_in\_bytes Total size of the storage database file physically allocated in bytes. * Stability Level:ALPHA * Type: Gauge * Labels:endpoint * Deprecated Versions:1.28.0 apiserver\_storage\_decode\_errors\_total Number of stored object decode errors split by object type * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_storage\_envelope\_transformation\_cache\_misses\_total Total number of cache misses while accessing key decryption key(KEK). * Stability Level:ALPHA * Type: Counter apiserver\_storage\_events\_received\_total Number of etcd events received split by kind. * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_storage\_list\_evaluated\_objects\_total Number of objects tested in the course of serving a LIST request from storage * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_storage\_list\_fetched\_objects\_total Number of objects read from storage in the course of serving a LIST request * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_storage\_list\_returned\_objects\_total Number of objects returned for a LIST request from storage * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_storage\_list\_total Number of LIST requests served from storage * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_storage\_transformation\_duration\_seconds Latencies in seconds of value transformation operations. * Stability Level:ALPHA * Type: Histogram * Labels:transformation\_typetransformer\_prefix apiserver\_storage\_transformation\_operations\_total Total number of transformations. Successful transformation will have a status 'OK' and a varied status string when the transformation fails. The status, resource, and transformation\_type fields can be used for alerting purposes. For example, you can monitor for encryption/decryption failures using the transformation\_type (e.g., from\_storage for decryption and to\_storage for encryption). Additionally, these fields can be used to ensure that the correct transformers are applied to each resource. * Stability Level:ALPHA * Type: Counter * Labels:resourcestatustransformation\_typetransformer\_prefix apiserver\_stream\_translator\_requests\_total Total number of requests that were handled by the StreamTranslatorProxy, which processes streaming RemoteCommand/V5 * Stability Level:ALPHA * Type: Counter * Labels:code apiserver\_stream\_tunnel\_requests\_total Total number of requests that were handled by the StreamTunnelProxy, which processes streaming PortForward/V2 * Stability Level:ALPHA * Type: Counter * Labels:code apiserver\_terminated\_watchers\_total Counter of watchers closed due to unresponsiveness broken by resource type. * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_tls\_handshake\_errors\_total Number of requests dropped with 'TLS handshake error from' error * Stability Level:ALPHA * Type: Counter apiserver\_validation\_declarative\_validation\_panics\_total Number of panics in declarative validation, broken down by validation identifier. * Stability Level:ALPHA * Type: Counter * Labels:validation\_identifier apiserver\_validation\_declarative\_validation\_parity\_discrepancies\_total Number of discrepancies between declarative and handwritten validation, broken down by validation identifier. * Stability Level:ALPHA * Type: Counter * Labels:validation\_identifier apiserver\_watch\_cache\_consistent\_read\_total Counter for consistent reads from cache. * Stability Level:ALPHA * Type: Counter * Labels:fallbackgroupresourcesuccess apiserver\_watch\_cache\_events\_dispatched\_total Counter of events dispatched in watch cache broken by resource type. * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_watch\_cache\_events\_received\_total Counter of events received in watch cache broken by resource type. * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_watch\_cache\_initializations\_total Counter of watch cache initializations broken by resource type. * Stability Level:ALPHA * Type: Counter * Labels:groupresource apiserver\_watch\_cache\_read\_wait\_seconds Histogram of time spent waiting for a watch cache to become fresh. * Stability Level:ALPHA * Type: Histogram * Labels:groupresource apiserver\_watch\_cache\_resource\_version Current resource version of watch cache broken by resource type. * Stability Level:ALPHA * Type: Gauge * Labels:groupresource apiserver\_watch\_events\_sizes Watch event size distribution in bytes * Stability Level:ALPHA * Type: Histogram * Labels:groupresourceversion apiserver\_watch\_events\_total Number of events sent in watch clients * Stability Level:ALPHA * Type: Counter * Labels:groupresourceversion apiserver\_watch\_list\_duration\_seconds Response latency distribution
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.183377
of watch cache broken by resource type. * Stability Level:ALPHA * Type: Gauge * Labels:groupresource apiserver\_watch\_events\_sizes Watch event size distribution in bytes * Stability Level:ALPHA * Type: Histogram * Labels:groupresourceversion apiserver\_watch\_events\_total Number of events sent in watch clients * Stability Level:ALPHA * Type: Counter * Labels:groupresourceversion apiserver\_watch\_list\_duration\_seconds Response latency distribution in seconds for watch list requests broken by group, version, resource and scope. * Stability Level:ALPHA * Type: Histogram * Labels:groupresourcescopeversion apiserver\_webhooks\_x509\_insecure\_sha1\_total Counts the number of requests to servers with insecure SHA1 signatures in their serving certificate OR the number of connection failures due to the insecure SHA1 signatures (either/or, based on the runtime environment) * Stability Level:ALPHA * Type: Counter apiserver\_webhooks\_x509\_missing\_san\_total Counts the number of requests to servers missing SAN extension in their serving certificate OR the number of connection failures due to the lack of x509 certificate SAN extension missing (either/or, based on the runtime environment) * Stability Level:ALPHA * Type: Counter attach\_detach\_controller\_attachdetach\_controller\_forced\_detaches Number of times the A/D Controller performed a forced detach * Stability Level:ALPHA * Type: Counter * Labels:reason attachdetach\_controller\_total\_volumes Number of volumes in A/D Controller * Stability Level:ALPHA * Type: Custom * Labels:plugin\_namestate authenticated\_user\_requests Counter of authenticated requests broken out by username. * Stability Level:ALPHA * Type: Counter * Labels:username authentication\_attempts Counter of authenticated attempts. * Stability Level:ALPHA * Type: Counter * Labels:result authentication\_duration\_seconds Authentication duration in seconds broken out by result. * Stability Level:ALPHA * Type: Histogram * Labels:result authentication\_token\_cache\_active\_fetch\_count * Stability Level:ALPHA * Type: Gauge * Labels:status authentication\_token\_cache\_fetch\_total * Stability Level:ALPHA * Type: Counter * Labels:status authentication\_token\_cache\_request\_duration\_seconds * Stability Level:ALPHA * Type: Histogram * Labels:status authentication\_token\_cache\_request\_total * Stability Level:ALPHA * Type: Counter * Labels:status authorization\_attempts\_total Counter of authorization attempts broken down by result. It can be either 'allowed', 'denied', 'no-opinion' or 'error'. * Stability Level:ALPHA * Type: Counter * Labels:result authorization\_duration\_seconds Authorization duration in seconds broken out by result. * Stability Level:ALPHA * Type: Histogram * Labels:result cloud\_provider\_webhook\_request\_duration\_seconds Request latency in seconds. Broken down by status code. * Stability Level:ALPHA * Type: Histogram * Labels:codewebhook cloud\_provider\_webhook\_request\_total Number of HTTP requests partitioned by status code. * Stability Level:ALPHA * Type: Counter * Labels:codewebhook clustertrustbundle\_publisher\_sync\_duration\_seconds The time it took to sync a cluster trust bundle. * Stability Level:ALPHA * Type: Histogram * Labels:code clustertrustbundle\_publisher\_sync\_total Number of syncs that occurred in cluster trust bundle publisher. * Stability Level:ALPHA * Type: Counter * Labels:code container\_swap\_limit\_bytes Current amount of the container swap limit in bytes. Reported only on non-windows systems * Stability Level:ALPHA * Type: Custom * Labels:containerpodnamespace container\_swap\_usage\_bytes Current amount of the container swap usage in bytes. Reported only on non-windows systems * Stability Level:ALPHA * Type: Custom * Labels:containerpodnamespace csi\_operations\_seconds Container Storage Interface operation duration with gRPC error code status total * Stability Level:ALPHA * Type: Histogram * Labels:driver\_namegrpc\_status\_codemethod\_namemigrated device\_taint\_eviction\_controller\_pod\_deletion\_duration\_seconds Latency, in seconds, between the time when a device taint effect has been activated and a Pod's deletion via DeviceTaintEvictionController. * Stability Level:ALPHA * Type: Histogram device\_taint\_eviction\_controller\_pod\_deletions\_total Total number of Pods deleted by DeviceTaintEvictionController since its start. * Stability Level:ALPHA * Type: Counter dra\_grpc\_operations\_duration\_seconds Duration in seconds of the DRA gRPC operations * Stability Level:ALPHA * Type: Histogram * Labels:driver\_namegrpc\_status\_codemethod\_name dra\_operations\_duration\_seconds Latency histogram in seconds for the duration of handling all ResourceClaims referenced by a pod when the pod starts or stops. Identified by the name of the operation (PrepareResources or UnprepareResources) and separated by the success of the operation. The number of failed operations is provided through the histogram's overall count. * Stability Level:ALPHA * Type: Histogram * Labels:is\_erroroperation\_name dra\_resource\_claims\_in\_use The number of ResourceClaims that are currently in use on the node, by driver name (driver\_name label value) and across all drivers (special value for
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.134468
success of the operation. The number of failed operations is provided through the histogram's overall count. * Stability Level:ALPHA * Type: Histogram * Labels:is\_erroroperation\_name dra\_resource\_claims\_in\_use The number of ResourceClaims that are currently in use on the node, by driver name (driver\_name label value) and across all drivers (special value for driver\_name). Note that the sum of all by-driver counts is not the total number of in-use ResourceClaims because the same ResourceClaim might use devices from different drivers. Instead, use the count for the driver\_name. * Stability Level:ALPHA * Type: Custom * Labels:driver\_name endpoint\_slice\_controller\_changes Number of EndpointSlice changes * Stability Level:ALPHA * Type: Counter * Labels:operation endpoint\_slice\_controller\_desired\_endpoint\_slices Number of EndpointSlices that would exist with perfect endpoint allocation * Stability Level:ALPHA * Type: Gauge endpoint\_slice\_controller\_endpoints\_added\_per\_sync Number of endpoints added on each Service sync * Stability Level:ALPHA * Type: Histogram endpoint\_slice\_controller\_endpoints\_desired Number of endpoints desired * Stability Level:ALPHA * Type: Gauge endpoint\_slice\_controller\_endpoints\_removed\_per\_sync Number of endpoints removed on each Service sync * Stability Level:ALPHA * Type: Histogram endpoint\_slice\_controller\_endpointslices\_changed\_per\_sync Number of EndpointSlices changed on each Service sync * Stability Level:ALPHA * Type: Histogram * Labels:topologytraffic\_distribution endpoint\_slice\_controller\_num\_endpoint\_slices Number of EndpointSlices * Stability Level:ALPHA * Type: Gauge endpoint\_slice\_controller\_services\_count\_by\_traffic\_distribution Number of Services using some specific trafficDistribution * Stability Level:ALPHA * Type: Gauge * Labels:traffic\_distribution endpoint\_slice\_controller\_syncs Number of EndpointSlice syncs * Stability Level:ALPHA * Type: Counter * Labels:result endpoint\_slice\_mirroring\_controller\_addresses\_skipped\_per\_sync Number of addresses skipped on each Endpoints sync due to being invalid or exceeding MaxEndpointsPerSubset * Stability Level:ALPHA * Type: Histogram endpoint\_slice\_mirroring\_controller\_changes Number of EndpointSlice changes * Stability Level:ALPHA * Type: Counter * Labels:operation endpoint\_slice\_mirroring\_controller\_desired\_endpoint\_slices Number of EndpointSlices that would exist with perfect endpoint allocation * Stability Level:ALPHA * Type: Gauge endpoint\_slice\_mirroring\_controller\_endpoints\_added\_per\_sync Number of endpoints added on each Endpoints sync * Stability Level:ALPHA * Type: Histogram endpoint\_slice\_mirroring\_controller\_endpoints\_desired Number of endpoints desired * Stability Level:ALPHA * Type: Gauge endpoint\_slice\_mirroring\_controller\_endpoints\_removed\_per\_sync Number of endpoints removed on each Endpoints sync * Stability Level:ALPHA * Type: Histogram endpoint\_slice\_mirroring\_controller\_endpoints\_sync\_duration Duration of syncEndpoints() in seconds * Stability Level:ALPHA * Type: Histogram endpoint\_slice\_mirroring\_controller\_endpoints\_updated\_per\_sync Number of endpoints updated on each Endpoints sync * Stability Level:ALPHA * Type: Histogram endpoint\_slice\_mirroring\_controller\_num\_endpoint\_slices Number of EndpointSlices * Stability Level:ALPHA * Type: Gauge ephemeral\_volume\_controller\_create\_failures\_total Number of PersistentVolumeClaim creation requests * Stability Level:ALPHA * Type: Counter ephemeral\_volume\_controller\_create\_total Number of PersistentVolumeClaim creation requests * Stability Level:ALPHA * Type: Counter etcd\_bookmark\_counts Number of etcd bookmarks (progress notify events) split by kind. * Stability Level:ALPHA * Type: Gauge * Labels:groupresource etcd\_lease\_object\_counts Number of objects attached to a single etcd lease. * Stability Level:ALPHA * Type: Histogram etcd\_request\_duration\_seconds Etcd request latency in seconds for each operation and object type. * Stability Level:ALPHA * Type: Histogram * Labels:groupoperationresource etcd\_request\_errors\_total Etcd failed request counts for each operation and object type. * Stability Level:ALPHA * Type: Counter * Labels:groupoperationresource etcd\_requests\_total Etcd request counts for each operation and object type. * Stability Level:ALPHA * Type: Counter * Labels:groupoperationresource etcd\_version\_info Etcd server's binary version * Stability Level:ALPHA * Type: Gauge * Labels:binary\_version field\_validation\_request\_duration\_seconds Response latency distribution in seconds for each field validation value * Stability Level:ALPHA * Type: Histogram * Labels:field\_validation force\_cleaned\_failed\_volume\_operation\_errors\_total The number of volumes that failed force cleanup after their reconstruction failed during kubelet startup. * Stability Level:ALPHA * Type: Counter force\_cleaned\_failed\_volume\_operations\_total The number of volumes that were force cleaned after their reconstruction failed during kubelet startup. This includes both successful and failed cleanups. * Stability Level:ALPHA * Type: Counter garbagecollector\_controller\_resources\_sync\_error\_total Number of garbage collector resources sync errors * Stability Level:ALPHA * Type: Counter horizontal\_pod\_autoscaler\_controller\_desired\_replicas Current desired replica count for HPA objects. * Stability Level:ALPHA * Type: Gauge * Labels:hpa\_namenamespace horizontal\_pod\_autoscaler\_controller\_metric\_computation\_duration\_seconds The time(seconds) that the HPA controller takes to calculate one metric. The label 'action' should be either 'scale\_down', 'scale\_up', or 'none'.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.126147
of garbage collector resources sync errors * Stability Level:ALPHA * Type: Counter horizontal\_pod\_autoscaler\_controller\_desired\_replicas Current desired replica count for HPA objects. * Stability Level:ALPHA * Type: Gauge * Labels:hpa\_namenamespace horizontal\_pod\_autoscaler\_controller\_metric\_computation\_duration\_seconds The time(seconds) that the HPA controller takes to calculate one metric. The label 'action' should be either 'scale\_down', 'scale\_up', or 'none'. The label 'error' should be either 'spec', 'internal', or 'none'. The label 'metric\_type' corresponds to HPA.spec.metrics[\*].type * Stability Level:ALPHA * Type: Histogram * Labels:actionerrormetric\_type horizontal\_pod\_autoscaler\_controller\_metric\_computation\_total Number of metric computations. The label 'action' should be either 'scale\_down', 'scale\_up', or 'none'. Also, the label 'error' should be either 'spec', 'internal', or 'none'. The label 'metric\_type' corresponds to HPA.spec.metrics[\*].type * Stability Level:ALPHA * Type: Counter * Labels:actionerrormetric\_type horizontal\_pod\_autoscaler\_controller\_num\_horizontal\_pod\_autoscalers Current number of controlled HPA objects. * Stability Level:ALPHA * Type: Gauge horizontal\_pod\_autoscaler\_controller\_reconciliation\_duration\_seconds The time(seconds) that the HPA controller takes to reconcile once. The label 'action' should be either 'scale\_down', 'scale\_up', or 'none'. Also, the label 'error' should be either 'spec', 'internal', or 'none'. Note that if both spec and internal errors happen during a reconciliation, the first one to occur is reported in `error` label. * Stability Level:ALPHA * Type: Histogram * Labels:actionerror horizontal\_pod\_autoscaler\_controller\_reconciliations\_total Number of reconciliations of HPA controller. The label 'action' should be either 'scale\_down', 'scale\_up', or 'none'. Also, the label 'error' should be either 'spec', 'internal', or 'none'. Note that if both spec and internal errors happen during a reconciliation, the first one to occur is reported in `error` label. * Stability Level:ALPHA * Type: Counter * Labels:actionerror job\_controller\_job\_finished\_indexes\_total `The number of finished indexes. Possible values for the, status label are: "succeeded", "failed". Possible values for the, backoffLimit label are: "perIndex" and "global"` * Stability Level:ALPHA * Type: Counter * Labels:backoffLimitstatus job\_controller\_job\_pods\_creation\_total `The number of Pods created by the Job controller labelled with a reason for the Pod creation., This metric also distinguishes between Pods created using different PodReplacementPolicy settings., Possible values of the "reason" label are:, "new", "recreate\_terminating\_or\_failed", "recreate\_failed"., Possible values of the "status" label are:, "succeeded", "failed".` * Stability Level:ALPHA * Type: Counter * Labels:reasonstatus job\_controller\_jobs\_by\_external\_controller\_total The number of Jobs managed by an external controller * Stability Level:ALPHA * Type: Counter * Labels:controller\_name job\_controller\_pod\_failures\_handled\_by\_failure\_policy\_total `The number of failed Pods handled by failure policy with, respect to the failure policy action applied based on the matched, rule. Possible values of the action label correspond to the, possible values for the failure policy rule action, which are:, "FailJob", "Ignore" and "Count".` * Stability Level:ALPHA * Type: Counter * Labels:action job\_controller\_terminated\_pods\_tracking\_finalizer\_total `The number of terminated pods (phase=Failed|Succeeded), that have the finalizer batch.kubernetes.io/job-tracking, The event label can be "add" or "delete".` * Stability Level:ALPHA * Type: Counter * Labels:event kube\_apiserver\_clusterip\_allocator\_allocated\_ips Gauge measuring the number of allocated IPs for Services * Stability Level:ALPHA * Type: Gauge * Labels:cidr kube\_apiserver\_clusterip\_allocator\_allocation\_duration\_seconds Duration in seconds to allocate a Cluster IP by ServiceCIDR * Stability Level:ALPHA * Type: Histogram * Labels:cidr kube\_apiserver\_clusterip\_allocator\_allocation\_errors\_total Number of errors trying to allocate Cluster IPs * Stability Level:ALPHA * Type: Counter * Labels:cidrscope kube\_apiserver\_clusterip\_allocator\_allocation\_total Number of Cluster IPs allocations * Stability Level:ALPHA * Type: Counter * Labels:cidrscope kube\_apiserver\_clusterip\_allocator\_available\_ips Gauge measuring the number of available IPs for Services * Stability Level:ALPHA * Type: Gauge * Labels:cidr kube\_apiserver\_nodeport\_allocator\_allocated\_ports Gauge measuring the number of allocated NodePorts for Services * Stability Level:ALPHA * Type: Gauge kube\_apiserver\_nodeport\_allocator\_allocation\_errors\_total Number of errors trying to allocate NodePort * Stability Level:ALPHA * Type: Counter * Labels:scope kube\_apiserver\_nodeport\_allocator\_allocation\_total Number of NodePort allocations * Stability Level:ALPHA * Type: Counter * Labels:scope kube\_apiserver\_nodeport\_allocator\_available\_ports Gauge measuring the number of available NodePorts for Services * Stability Level:ALPHA * Type: Gauge kube\_apiserver\_pod\_logs\_backend\_tls\_failure\_total Total number of requests for pods/logs that failed due to kubelet server TLS verification * Stability
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.150468
Type: Counter * Labels:scope kube\_apiserver\_nodeport\_allocator\_allocation\_total Number of NodePort allocations * Stability Level:ALPHA * Type: Counter * Labels:scope kube\_apiserver\_nodeport\_allocator\_available\_ports Gauge measuring the number of available NodePorts for Services * Stability Level:ALPHA * Type: Gauge kube\_apiserver\_pod\_logs\_backend\_tls\_failure\_total Total number of requests for pods/logs that failed due to kubelet server TLS verification * Stability Level:ALPHA * Type: Counter kube\_apiserver\_pod\_logs\_insecure\_backend\_total Total number of requests for pods/logs sliced by usage type: enforce\_tls, skip\_tls\_allowed, skip\_tls\_denied * Stability Level:ALPHA * Type: Counter * Labels:usage kube\_apiserver\_pod\_logs\_pods\_logs\_backend\_tls\_failure\_total Total number of requests for pods/logs that failed due to kubelet server TLS verification * Stability Level:ALPHA * Type: Counter * Deprecated Versions:1.27.0 kube\_apiserver\_pod\_logs\_pods\_logs\_insecure\_backend\_total Total number of requests for pods/logs sliced by usage type: enforce\_tls, skip\_tls\_allowed, skip\_tls\_denied * Stability Level:ALPHA * Type: Counter * Labels:usage * Deprecated Versions:1.27.0 kubelet\_active\_pods The number of pods the kubelet considers active and which are being considered when admitting new pods. static is true if the pod is not from the apiserver. * Stability Level:ALPHA * Type: Gauge * Labels:static kubelet\_admission\_rejections\_total Cumulative number pod admission rejections by the Kubelet. * Stability Level:ALPHA * Type: Counter * Labels:reason kubelet\_certificate\_manager\_client\_expiration\_renew\_errors Counter of certificate renewal errors. * Stability Level:ALPHA * Type: Counter kubelet\_certificate\_manager\_client\_ttl\_seconds Gauge of the TTL (time-to-live) of the Kubelet's client certificate. The value is in seconds until certificate expiry (negative if already expired). If client certificate is invalid or unused, the value will be +INF. * Stability Level:ALPHA * Type: Gauge kubelet\_certificate\_manager\_server\_rotation\_seconds Histogram of the number of seconds the previous certificate lived before being rotated. * Stability Level:ALPHA * Type: Histogram kubelet\_certificate\_manager\_server\_ttl\_seconds Gauge of the shortest TTL (time-to-live) of the Kubelet's serving certificate. The value is in seconds until certificate expiry (negative if already expired). If serving certificate is invalid or unused, the value will be +INF. * Stability Level:ALPHA * Type: Gauge kubelet\_cgroup\_manager\_duration\_seconds Duration in seconds for cgroup manager operations. Broken down by method. * Stability Level:ALPHA * Type: Histogram * Labels:operation\_type kubelet\_cgroup\_version cgroup version on the hosts. * Stability Level:ALPHA * Type: Gauge kubelet\_container\_aligned\_compute\_resources\_count Cumulative number of aligned compute resources allocated to containers by alignment type. * Stability Level:ALPHA * Type: Counter * Labels:boundaryscope kubelet\_container\_aligned\_compute\_resources\_failure\_count Cumulative number of failures to allocate aligned compute resources to containers by alignment type. * Stability Level:ALPHA * Type: Counter * Labels:boundaryscope kubelet\_container\_log\_filesystem\_used\_bytes Bytes used by the container's logs on the filesystem. * Stability Level:ALPHA * Type: Custom * Labels:uidnamespacepodcontainer kubelet\_container\_requested\_resizes\_total Number of requested resizes, counted at the container level. Different resources on the same container are counted separately. The 'requirement' label refers to 'memory' or 'limits'; the 'operation' label can be one of 'add', 'remove', 'increase' or 'decrease'. * Stability Level:ALPHA * Type: Counter * Labels:operationrequirementresource kubelet\_containers\_per\_pod\_count The number of containers per pod. * Stability Level:ALPHA * Type: Histogram kubelet\_cpu\_manager\_allocation\_per\_numa Number of CPUs allocated per NUMA node * Stability Level:ALPHA * Type: Gauge * Labels:numa\_node kubelet\_cpu\_manager\_exclusive\_cpu\_allocation\_count The total number of CPUs exclusively allocated to containers running on this node * Stability Level:ALPHA * Type: Gauge kubelet\_cpu\_manager\_pinning\_errors\_total The number of cpu core allocations which required pinning failed. * Stability Level:ALPHA * Type: Counter kubelet\_cpu\_manager\_pinning\_requests\_total The number of cpu core allocations which required pinning. * Stability Level:ALPHA * Type: Counter kubelet\_cpu\_manager\_shared\_pool\_size\_millicores The size of the shared CPU pool for non-guaranteed QoS pods, in millicores. * Stability Level:ALPHA * Type: Gauge kubelet\_credential\_provider\_config\_info Information about the last applied credential provider configuration with hash as label * Stability Level:ALPHA * Type: Custom * Labels:hash kubelet\_credential\_provider\_plugin\_duration Duration of execution in seconds for credential provider plugin * Stability Level:ALPHA * Type: Histogram * Labels:plugin\_name kubelet\_credential\_provider\_plugin\_errors\_total Number of errors from credential provider plugin * Stability Level:ALPHA * Type: Counter * Labels:plugin\_name kubelet\_cri\_losing\_support the Kubernetes version that the currently running
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.226689
* Stability Level:ALPHA * Type: Custom * Labels:hash kubelet\_credential\_provider\_plugin\_duration Duration of execution in seconds for credential provider plugin * Stability Level:ALPHA * Type: Histogram * Labels:plugin\_name kubelet\_credential\_provider\_plugin\_errors\_total Number of errors from credential provider plugin * Stability Level:ALPHA * Type: Counter * Labels:plugin\_name kubelet\_cri\_losing\_support the Kubernetes version that the currently running CRI implementation will lose support on if not upgraded. * Stability Level:ALPHA * Type: Gauge * Labels:version kubelet\_desired\_pods The number of pods the kubelet is being instructed to run. static is true if the pod is not from the apiserver. * Stability Level:ALPHA * Type: Gauge * Labels:static kubelet\_device\_plugin\_alloc\_duration\_seconds Duration in seconds to serve a device plugin Allocation request. Broken down by resource name. * Stability Level:ALPHA * Type: Histogram * Labels:resource\_name kubelet\_device\_plugin\_registration\_total Cumulative number of device plugin registrations. Broken down by resource name. * Stability Level:ALPHA * Type: Counter * Labels:resource\_name kubelet\_evented\_pleg\_connection\_error\_count The number of errors encountered during the establishment of streaming connection with the CRI runtime. * Stability Level:ALPHA * Type: Counter kubelet\_evented\_pleg\_connection\_latency\_seconds The latency of streaming connection with the CRI runtime, measured in seconds. * Stability Level:ALPHA * Type: Histogram kubelet\_evented\_pleg\_connection\_success\_count The number of times a streaming client was obtained to receive CRI Events. * Stability Level:ALPHA * Type: Counter kubelet\_eviction\_stats\_age\_seconds Time between when stats are collected, and when pod is evicted based on those stats by eviction signal * Stability Level:ALPHA * Type: Histogram * Labels:eviction\_signal kubelet\_evictions Cumulative number of pod evictions by eviction signal * Stability Level:ALPHA * Type: Counter * Labels:eviction\_signal kubelet\_graceful\_shutdown\_end\_time\_seconds Last graceful shutdown end time since unix epoch in seconds * Stability Level:ALPHA * Type: Gauge kubelet\_graceful\_shutdown\_start\_time\_seconds Last graceful shutdown start time since unix epoch in seconds * Stability Level:ALPHA * Type: Gauge kubelet\_http\_inflight\_requests Number of the inflight http requests * Stability Level:ALPHA * Type: Gauge * Labels:long\_runningmethodpathserver\_type kubelet\_http\_requests\_duration\_seconds Duration in seconds to serve http requests * Stability Level:ALPHA * Type: Histogram * Labels:long\_runningmethodpathserver\_type kubelet\_http\_requests\_total Number of the http requests received since the server started * Stability Level:ALPHA * Type: Counter * Labels:long\_runningmethodpathserver\_type kubelet\_image\_garbage\_collected\_total Total number of images garbage collected by the kubelet, whether through disk usage or image age. * Stability Level:ALPHA * Type: Counter * Labels:reason kubelet\_image\_manager\_ensure\_image\_requests\_total Number of ensure-image requests processed by the kubelet. * Stability Level:ALPHA * Type: Counter * Labels:present\_locallypull\_policypull\_required kubelet\_image\_pull\_duration\_seconds Duration in seconds to pull an image. * Stability Level:ALPHA * Type: Histogram * Labels:image\_size\_in\_bytes kubelet\_imagemanager\_image\_mustpull\_checks\_total Counter for how many times kubelet checked whether credentials need to be re-verified to access an image * Stability Level:ALPHA * Type: Counter * Labels:result kubelet\_imagemanager\_inmemory\_pulledrecords\_usage\_percent The ImagePulledRecords in-memory cache usage in percent. * Stability Level:ALPHA * Type: Gauge kubelet\_imagemanager\_inmemory\_pullintents\_usage\_percent The ImagePullIntents in-memory cache usage in percent. * Stability Level:ALPHA * Type: Gauge kubelet\_imagemanager\_ondisk\_pulledrecords Number of ImagePulledRecords stored on disk. * Stability Level:ALPHA * Type: Gauge kubelet\_imagemanager\_ondisk\_pullintents Number of ImagePullIntents stored on disk. * Stability Level:ALPHA * Type: Gauge kubelet\_lifecycle\_handler\_http\_fallbacks\_total The number of times lifecycle handlers successfully fell back to http from https. * Stability Level:ALPHA * Type: Counter kubelet\_managed\_ephemeral\_containers Current number of ephemeral containers in pods managed by this kubelet. * Stability Level:ALPHA * Type: Gauge kubelet\_memory\_manager\_pinning\_errors\_total The number of memory pages allocations which required pinning that failed. * Stability Level:ALPHA * Type: Counter kubelet\_memory\_manager\_pinning\_requests\_total The number of memory pages allocations which required pinning. * Stability Level:ALPHA * Type: Counter kubelet\_mirror\_pods The number of mirror pods the kubelet will try to create (one per admitted static pod) * Stability Level:ALPHA * Type: Gauge kubelet\_node\_name The node's name. The count is always 1. * Stability Level:ALPHA * Type: Gauge * Labels:node kubelet\_node\_startup\_duration\_seconds Duration in seconds of node startup in total. * Stability Level:ALPHA * Type: Gauge kubelet\_node\_startup\_post\_registration\_duration\_seconds Duration in seconds
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.206134
try to create (one per admitted static pod) * Stability Level:ALPHA * Type: Gauge kubelet\_node\_name The node's name. The count is always 1. * Stability Level:ALPHA * Type: Gauge * Labels:node kubelet\_node\_startup\_duration\_seconds Duration in seconds of node startup in total. * Stability Level:ALPHA * Type: Gauge kubelet\_node\_startup\_post\_registration\_duration\_seconds Duration in seconds of node startup after registration. * Stability Level:ALPHA * Type: Gauge kubelet\_node\_startup\_pre\_kubelet\_duration\_seconds Duration in seconds of node startup before kubelet starts. * Stability Level:ALPHA * Type: Gauge kubelet\_node\_startup\_pre\_registration\_duration\_seconds Duration in seconds of node startup before registration. * Stability Level:ALPHA * Type: Gauge kubelet\_node\_startup\_registration\_duration\_seconds Duration in seconds of node startup during registration. * Stability Level:ALPHA * Type: Gauge kubelet\_orphan\_pod\_cleaned\_volumes The total number of orphaned Pods whose volumes were cleaned in the last periodic sweep. * Stability Level:ALPHA * Type: Gauge kubelet\_orphan\_pod\_cleaned\_volumes\_errors The number of orphaned Pods whose volumes failed to be cleaned in the last periodic sweep. * Stability Level:ALPHA * Type: Gauge kubelet\_orphaned\_runtime\_pods\_total Number of pods that have been detected in the container runtime without being already known to the pod worker. This typically indicates the kubelet was restarted while a pod was force deleted in the API or in the local configuration, which is unusual. * Stability Level:ALPHA * Type: Counter kubelet\_pleg\_discard\_events The number of discard events in PLEG. * Stability Level:ALPHA * Type: Counter kubelet\_pleg\_last\_seen\_seconds Timestamp in seconds when PLEG was last seen active. * Stability Level:ALPHA * Type: Gauge kubelet\_pleg\_relist\_duration\_seconds Duration in seconds for relisting pods in PLEG. * Stability Level:ALPHA * Type: Histogram kubelet\_pleg\_relist\_interval\_seconds Interval in seconds between relisting in PLEG. * Stability Level:ALPHA * Type: Histogram kubelet\_pod\_deferred\_accepted\_resizes\_total Cumulative number of resizes that were accepted after being deferred. * Stability Level:ALPHA * Type: Counter * Labels:retry\_trigger kubelet\_pod\_in\_progress\_resizes Number of in-progress resizes for pods. * Stability Level:ALPHA * Type: Gauge kubelet\_pod\_infeasible\_resizes\_total Number of infeasible resizes for pods. * Stability Level:ALPHA * Type: Counter * Labels:reason\_detail kubelet\_pod\_pending\_resizes Number of pending resizes for pods. * Stability Level:ALPHA * Type: Gauge * Labels:reason kubelet\_pod\_resize\_duration\_milliseconds Duration in milliseconds to actuate a pod resize * Stability Level:ALPHA * Type: Histogram * Labels:success kubelet\_pod\_resources\_endpoint\_errors\_get Number of requests to the PodResource Get endpoint which returned error. Broken down by server api version. * Stability Level:ALPHA * Type: Counter * Labels:server\_api\_version kubelet\_pod\_resources\_endpoint\_errors\_get\_allocatable Number of requests to the PodResource GetAllocatableResources endpoint which returned error. Broken down by server api version. * Stability Level:ALPHA * Type: Counter * Labels:server\_api\_version kubelet\_pod\_resources\_endpoint\_errors\_list Number of requests to the PodResource List endpoint which returned error. Broken down by server api version. * Stability Level:ALPHA * Type: Counter * Labels:server\_api\_version kubelet\_pod\_resources\_endpoint\_requests\_get Number of requests to the PodResource Get endpoint. Broken down by server api version. * Stability Level:ALPHA * Type: Counter * Labels:server\_api\_version kubelet\_pod\_resources\_endpoint\_requests\_get\_allocatable Number of requests to the PodResource GetAllocatableResources endpoint. Broken down by server api version. * Stability Level:ALPHA * Type: Counter * Labels:server\_api\_version kubelet\_pod\_resources\_endpoint\_requests\_list Number of requests to the PodResource List endpoint. Broken down by server api version. * Stability Level:ALPHA * Type: Counter * Labels:server\_api\_version kubelet\_pod\_resources\_endpoint\_requests\_total Cumulative number of requests to the PodResource endpoint. Broken down by server api version. * Stability Level:ALPHA * Type: Counter * Labels:server\_api\_version kubelet\_pod\_start\_duration\_seconds Duration in seconds from kubelet seeing a pod for the first time to the pod starting to run * Stability Level:ALPHA * Type: Histogram kubelet\_pod\_start\_sli\_duration\_seconds Duration in seconds to start a pod, excluding time to pull images and run init containers, measured from pod creation timestamp to when all its containers are reported as started and observed via watch * Stability Level:ALPHA * Type: Histogram kubelet\_pod\_start\_total\_duration\_seconds Duration in seconds to start a pod since creation, including time to pull images and run init containers, measured from pod creation timestamp
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.183115
init containers, measured from pod creation timestamp to when all its containers are reported as started and observed via watch * Stability Level:ALPHA * Type: Histogram kubelet\_pod\_start\_total\_duration\_seconds Duration in seconds to start a pod since creation, including time to pull images and run init containers, measured from pod creation timestamp to when all its containers are reported as started and observed via watch * Stability Level:ALPHA * Type: Histogram kubelet\_pod\_status\_sync\_duration\_seconds Duration in seconds to sync a pod status update. Measures time from detection of a change to pod status until the API is successfully updated for that pod, even if multiple intevening changes to pod status occur. * Stability Level:ALPHA * Type: Histogram kubelet\_pod\_worker\_duration\_seconds Duration in seconds to sync a single pod. Broken down by operation type: create, update, or sync * Stability Level:ALPHA * Type: Histogram * Labels:operation\_type kubelet\_pod\_worker\_start\_duration\_seconds Duration in seconds from kubelet seeing a pod to starting a worker. * Stability Level:ALPHA * Type: Histogram kubelet\_podcertificate\_states Gauge vector reporting the number of pod certificate projected volume sources, faceted by signer\_name and state. * Stability Level:ALPHA * Type: Custom * Labels:signer\_namestate kubelet\_preemptions Cumulative number of pod preemptions by preemption resource * Stability Level:ALPHA * Type: Counter * Labels:preemption\_signal kubelet\_restarted\_pods\_total Number of pods that have been restarted because they were deleted and recreated with the same UID while the kubelet was watching them (common for static pods, extremely uncommon for API pods) * Stability Level:ALPHA * Type: Counter * Labels:static kubelet\_run\_podsandbox\_duration\_seconds Duration in seconds of the run\_podsandbox operations. Broken down by RuntimeClass.Handler. * Stability Level:ALPHA * Type: Histogram * Labels:runtime\_handler kubelet\_run\_podsandbox\_errors\_total Cumulative number of the run\_podsandbox operation errors by RuntimeClass.Handler. * Stability Level:ALPHA * Type: Counter * Labels:runtime\_handler kubelet\_running\_containers Number of containers currently running * Stability Level:ALPHA * Type: Gauge * Labels:container\_state kubelet\_running\_pods Number of pods that have a running pod sandbox * Stability Level:ALPHA * Type: Gauge kubelet\_runtime\_operations\_duration\_seconds Duration in seconds of runtime operations. Broken down by operation type. * Stability Level:ALPHA * Type: Histogram * Labels:operation\_type kubelet\_runtime\_operations\_errors\_total Cumulative number of runtime operation errors by operation type. * Stability Level:ALPHA * Type: Counter * Labels:operation\_type kubelet\_runtime\_operations\_total Cumulative number of runtime operations by operation type. * Stability Level:ALPHA * Type: Counter * Labels:operation\_type kubelet\_server\_expiration\_renew\_errors Counter of certificate renewal errors. * Stability Level:ALPHA * Type: Counter kubelet\_sleep\_action\_terminated\_early\_total The number of times lifecycle sleep handler got terminated before it finishes * Stability Level:ALPHA * Type: Counter kubelet\_started\_containers\_errors\_total Cumulative number of errors when starting containers * Stability Level:ALPHA * Type: Counter * Labels:codecontainer\_type kubelet\_started\_containers\_total Cumulative number of containers started * Stability Level:ALPHA * Type: Counter * Labels:container\_type kubelet\_started\_host\_process\_containers\_errors\_total Cumulative number of errors when starting hostprocess containers. This metric will only be collected on Windows. * Stability Level:ALPHA * Type: Counter * Labels:codecontainer\_type kubelet\_started\_host\_process\_containers\_total Cumulative number of hostprocess containers started. This metric will only be collected on Windows. * Stability Level:ALPHA * Type: Counter * Labels:container\_type kubelet\_started\_pods\_errors\_total Cumulative number of errors when starting pods * Stability Level:ALPHA * Type: Counter kubelet\_started\_pods\_total Cumulative number of pods started * Stability Level:ALPHA * Type: Counter kubelet\_started\_user\_namespaced\_pods\_errors\_total Cumulative number of errors when starting pods with user namespaces. This metric will only be collected on Linux. * Stability Level:ALPHA * Type: Counter kubelet\_started\_user\_namespaced\_pods\_total Cumulative number of pods with user namespaces started. This metric will only be collected on Linux. * Stability Level:ALPHA * Type: Counter kubelet\_topology\_manager\_admission\_duration\_ms Duration in milliseconds to serve a pod admission request. * Stability Level:ALPHA * Type: Histogram kubelet\_topology\_manager\_admission\_errors\_total The number of admission request failures where resources could not be aligned. * Stability Level:ALPHA * Type: Counter kubelet\_topology\_manager\_admission\_requests\_total The number of admission requests where resources have to be aligned. * Stability Level:ALPHA * Type: Counter
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.262896
milliseconds to serve a pod admission request. * Stability Level:ALPHA * Type: Histogram kubelet\_topology\_manager\_admission\_errors\_total The number of admission request failures where resources could not be aligned. * Stability Level:ALPHA * Type: Counter kubelet\_topology\_manager\_admission\_requests\_total The number of admission requests where resources have to be aligned. * Stability Level:ALPHA * Type: Counter kubelet\_volume\_metric\_collection\_duration\_seconds Duration in seconds to calculate volume stats * Stability Level:ALPHA * Type: Histogram * Labels:metric\_source kubelet\_volume\_stats\_available\_bytes Number of available bytes in the volume * Stability Level:ALPHA * Type: Custom * Labels:namespacepersistentvolumeclaim kubelet\_volume\_stats\_capacity\_bytes Capacity in bytes of the volume * Stability Level:ALPHA * Type: Custom * Labels:namespacepersistentvolumeclaim kubelet\_volume\_stats\_health\_status\_abnormal Abnormal volume health status. The count is either 1 or 0. 1 indicates the volume is unhealthy, 0 indicates volume is healthy * Stability Level:ALPHA * Type: Custom * Labels:namespacepersistentvolumeclaim kubelet\_volume\_stats\_inodes Maximum number of inodes in the volume * Stability Level:ALPHA * Type: Custom * Labels:namespacepersistentvolumeclaim kubelet\_volume\_stats\_inodes\_free Number of free inodes in the volume * Stability Level:ALPHA * Type: Custom * Labels:namespacepersistentvolumeclaim kubelet\_volume\_stats\_inodes\_used Number of used inodes in the volume * Stability Level:ALPHA * Type: Custom * Labels:namespacepersistentvolumeclaim kubelet\_volume\_stats\_used\_bytes Number of used bytes in the volume * Stability Level:ALPHA * Type: Custom * Labels:namespacepersistentvolumeclaim kubelet\_working\_pods Number of pods the kubelet is actually running, broken down by lifecycle phase, whether the pod is desired, orphaned, or runtime only (also orphaned), and whether the pod is static. An orphaned pod has been removed from local configuration or force deleted in the API and consumes resources that are not otherwise visible. * Stability Level:ALPHA * Type: Gauge * Labels:configlifecyclestatic kubeproxy\_conntrack\_reconciler\_deleted\_entries\_total Cumulative conntrack flows deleted by conntrack reconciler * Stability Level:ALPHA * Type: Counter * Labels:ip\_family kubeproxy\_conntrack\_reconciler\_sync\_duration\_seconds ReconcileConntrackFlowsLatency latency in seconds * Stability Level:ALPHA * Type: Histogram * Labels:ip\_family kubeproxy\_iptables\_ct\_state\_invalid\_dropped\_packets\_total packets dropped by iptables to work around conntrack problems * Stability Level:ALPHA * Type: Custom kubeproxy\_iptables\_localhost\_nodeports\_accepted\_packets\_total Number of packets accepted on nodeports of loopback interface * Stability Level:ALPHA * Type: Custom kubeproxy\_network\_programming\_duration\_seconds In Cluster Network Programming Latency in seconds * Stability Level:ALPHA * Type: Histogram * Labels:ip\_family kubeproxy\_proxy\_healthz\_total Cumulative proxy healthz HTTP status * Stability Level:ALPHA * Type: Counter * Labels:code kubeproxy\_proxy\_livez\_total Cumulative proxy livez HTTP status * Stability Level:ALPHA * Type: Counter * Labels:code kubeproxy\_sync\_full\_proxy\_rules\_duration\_seconds SyncProxyRules latency in seconds for full resyncs * Stability Level:ALPHA * Type: Histogram * Labels:ip\_family kubeproxy\_sync\_partial\_proxy\_rules\_duration\_seconds SyncProxyRules latency in seconds for partial resyncs * Stability Level:ALPHA * Type: Histogram * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_duration\_seconds SyncProxyRules latency in seconds * Stability Level:ALPHA * Type: Histogram * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_endpoint\_changes\_pending Pending proxy rules Endpoint changes * Stability Level:ALPHA * Type: Gauge kubeproxy\_sync\_proxy\_rules\_endpoint\_changes\_total Cumulative proxy rules Endpoint changes * Stability Level:ALPHA * Type: Counter kubeproxy\_sync\_proxy\_rules\_iptables\_last Number of iptables rules written by kube-proxy in last sync * Stability Level:ALPHA * Type: Gauge * Labels:ip\_familytable kubeproxy\_sync\_proxy\_rules\_iptables\_partial\_restore\_failures\_total Cumulative proxy iptables partial restore failures * Stability Level:ALPHA * Type: Counter * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_iptables\_restore\_failures\_total Cumulative proxy iptables restore failures * Stability Level:ALPHA * Type: Counter * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_iptables\_total Total number of iptables rules owned by kube-proxy * Stability Level:ALPHA * Type: Gauge * Labels:ip\_familytable kubeproxy\_sync\_proxy\_rules\_last\_queued\_timestamp\_seconds The last time a sync of proxy rules was queued * Stability Level:ALPHA * Type: Gauge * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_last\_timestamp\_seconds The last time proxy rules were successfully synced * Stability Level:ALPHA * Type: Gauge * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_nftables\_cleanup\_failures\_total Cumulative proxy nftables cleanup failures * Stability Level:ALPHA * Type: Counter * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_nftables\_sync\_failures\_total Cumulative proxy nftables sync failures * Stability Level:ALPHA * Type: Counter * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_no\_local\_endpoints\_total Number of services with a Local traffic policy and no endpoints * Stability Level:ALPHA * Type: Gauge * Labels:ip\_familytraffic\_policy kubeproxy\_sync\_proxy\_rules\_service\_changes\_pending Pending proxy rules Service changes * Stability Level:ALPHA * Type: Gauge kubeproxy\_sync\_proxy\_rules\_service\_changes\_total Cumulative proxy rules Service changes * Stability Level:ALPHA * Type:
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.232541
Stability Level:ALPHA * Type: Counter * Labels:ip\_family kubeproxy\_sync\_proxy\_rules\_no\_local\_endpoints\_total Number of services with a Local traffic policy and no endpoints * Stability Level:ALPHA * Type: Gauge * Labels:ip\_familytraffic\_policy kubeproxy\_sync\_proxy\_rules\_service\_changes\_pending Pending proxy rules Service changes * Stability Level:ALPHA * Type: Gauge kubeproxy\_sync\_proxy\_rules\_service\_changes\_total Cumulative proxy rules Service changes * Stability Level:ALPHA * Type: Counter kubernetes\_build\_info A metric with a constant '1' value labeled by major, minor, git version, git commit, git tree state, build date, Go version, and compiler from which Kubernetes was built, and platform on which it is running. * Stability Level:ALPHA * Type: Gauge * Labels:build\_datecompilergit\_commitgit\_tree\_stategit\_versiongo\_versionmajorminorplatform leader\_election\_master\_status Gauge of if the reporting system is master of the relevant lease, 0 indicates backup, 1 indicates master. 'name' is the string used to identify the lease. Please make sure to group by name. * Stability Level:ALPHA * Type: Gauge * Labels:name leader\_election\_slowpath\_total Total number of slow path exercised in renewing leader leases. 'name' is the string used to identify the lease. Please make sure to group by name. * Stability Level:ALPHA * Type: Counter * Labels:name node\_authorizer\_graph\_actions\_duration\_seconds Histogram of duration of graph actions in node authorizer. * Stability Level:ALPHA * Type: Histogram * Labels:operation node\_collector\_unhealthy\_nodes\_in\_zone Gauge measuring number of not Ready Nodes per zones. * Stability Level:ALPHA * Type: Gauge * Labels:zone node\_collector\_update\_all\_nodes\_health\_duration\_seconds Duration in seconds for NodeController to update the health of all nodes. * Stability Level:ALPHA * Type: Histogram node\_collector\_update\_node\_health\_duration\_seconds Duration in seconds for NodeController to update the health of a single node. * Stability Level:ALPHA * Type: Histogram node\_collector\_zone\_health Gauge measuring percentage of healthy nodes per zone. * Stability Level:ALPHA * Type: Gauge * Labels:zone node\_collector\_zone\_size Gauge measuring number of registered Nodes per zones. * Stability Level:ALPHA * Type: Gauge * Labels:zone node\_controller\_cloud\_provider\_taint\_removal\_delay\_seconds Number of seconds after node creation when NodeController removed the cloud-provider taint of a single node. * Stability Level:ALPHA * Type: Histogram node\_controller\_initial\_node\_sync\_delay\_seconds Number of seconds after node creation when NodeController finished the initial synchronization of a single node. * Stability Level:ALPHA * Type: Histogram node\_ipam\_controller\_cidrset\_allocation\_tries\_per\_request Number of endpoints added on each Service sync * Stability Level:ALPHA * Type: Histogram * Labels:clusterCIDR node\_ipam\_controller\_cidrset\_cidrs\_allocations\_total Counter measuring total number of CIDR allocations. * Stability Level:ALPHA * Type: Counter * Labels:clusterCIDR node\_ipam\_controller\_cidrset\_cidrs\_releases\_total Counter measuring total number of CIDR releases. * Stability Level:ALPHA * Type: Counter * Labels:clusterCIDR node\_ipam\_controller\_cidrset\_usage\_cidrs Gauge measuring percentage of allocated CIDRs. * Stability Level:ALPHA * Type: Gauge * Labels:clusterCIDR node\_ipam\_controller\_cirdset\_max\_cidrs Maximum number of CIDRs that can be allocated. * Stability Level:ALPHA * Type: Gauge * Labels:clusterCIDR node\_swap\_usage\_bytes Current swap usage of the node in bytes. Reported only on non-windows systems * Stability Level:ALPHA * Type: Custom plugin\_manager\_total\_plugins Number of plugins in Plugin Manager * Stability Level:ALPHA * Type: Custom * Labels:socket\_pathstate pod\_gc\_collector\_force\_delete\_pod\_errors\_total Number of errors encountered when forcefully deleting the pods since the Pod GC Controller started. * Stability Level:ALPHA * Type: Counter * Labels:namespacereason pod\_gc\_collector\_force\_delete\_pods\_total Number of pods that are being forcefully deleted since the Pod GC Controller started. * Stability Level:ALPHA * Type: Counter * Labels:namespacereason pod\_security\_errors\_total Number of errors preventing normal evaluation. Non-fatal errors may result in the latest restricted profile being used for evaluation. * Stability Level:ALPHA * Type: Counter * Labels:fatalrequest\_operationresourcesubresource pod\_security\_evaluations\_total Number of policy evaluations that occurred, not counting ignored or exempt requests. * Stability Level:ALPHA * Type: Counter * Labels:decisionmodepolicy\_levelpolicy\_versionrequest\_operationresourcesubresource pod\_security\_exemptions\_total Number of exempt requests, not counting ignored or out of scope requests. * Stability Level:ALPHA * Type: Counter * Labels:request\_operationresourcesubresource pod\_swap\_usage\_bytes Current amount of the pod swap usage in bytes. Reported only on non-windows systems * Stability Level:ALPHA * Type: Custom * Labels:podnamespace prober\_probe\_duration\_seconds Duration in seconds for a probe response. * Stability Level:ALPHA * Type: Histogram *
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.197278
out of scope requests. * Stability Level:ALPHA * Type: Counter * Labels:request\_operationresourcesubresource pod\_swap\_usage\_bytes Current amount of the pod swap usage in bytes. Reported only on non-windows systems * Stability Level:ALPHA * Type: Custom * Labels:podnamespace prober\_probe\_duration\_seconds Duration in seconds for a probe response. * Stability Level:ALPHA * Type: Histogram * Labels:containernamespacepodprobe\_type pv\_collector\_bound\_pv\_count Gauge measuring number of persistent volume currently bound * Stability Level:ALPHA * Type: Custom * Labels:storage\_class pv\_collector\_bound\_pvc\_count Gauge measuring number of persistent volume claim currently bound * Stability Level:ALPHA * Type: Custom * Labels:namespacestorage\_classvolume\_attributes\_class pv\_collector\_total\_pv\_count Gauge measuring total number of persistent volumes * Stability Level:ALPHA * Type: Custom * Labels:plugin\_namevolume\_mode pv\_collector\_unbound\_pv\_count Gauge measuring number of persistent volume currently unbound * Stability Level:ALPHA * Type: Custom * Labels:storage\_class pv\_collector\_unbound\_pvc\_count Gauge measuring number of persistent volume claim currently unbound * Stability Level:ALPHA * Type: Custom * Labels:namespacestorage\_classvolume\_attributes\_class reconstruct\_volume\_operations\_errors\_total The number of volumes that failed reconstruction from the operating system during kubelet startup. * Stability Level:ALPHA * Type: Counter reconstruct\_volume\_operations\_total The number of volumes that were attempted to be reconstructed from the operating system during kubelet startup. This includes both successful and failed reconstruction. * Stability Level:ALPHA * Type: Counter replicaset\_controller\_sorting\_deletion\_age\_ratio The ratio of chosen deleted pod's ages to the current youngest pod's age (at the time). Should be <2. The intent of this metric is to measure the rough efficacy of the LogarithmicScaleDown feature gate's effect on the sorting (and deletion) of pods when a replicaset scales down. This only considers Ready pods when calculating and reporting. * Stability Level:ALPHA * Type: Histogram resourceclaim\_controller\_creates\_total Number of ResourceClaims creation requests, categorized by creation status and admin access * Stability Level:ALPHA * Type: Counter * Labels:admin\_accessstatus resourceclaim\_controller\_resource\_claims Number of ResourceClaims, categorized by allocation status, admin access, and source. Source can be 'resource\_claim\_template' (created from a template), 'extended\_resource' (extended resources), or empty (manually created by a user). * Stability Level:ALPHA * Type: Custom * Labels:allocatedadmin\_accesssource rest\_client\_dns\_resolution\_duration\_seconds DNS resolver latency in seconds. Broken down by host. * Stability Level:ALPHA * Type: Histogram * Labels:host rest\_client\_exec\_plugin\_call\_total Number of calls to an exec plugin, partitioned by the type of event encountered (no\_error, plugin\_execution\_error, plugin\_not\_found\_error, client\_internal\_error) and an optional exit code. The exit code will be set to 0 if and only if the plugin call was successful. * Stability Level:ALPHA * Type: Counter * Labels:call\_statuscode rest\_client\_exec\_plugin\_certificate\_rotation\_age Histogram of the number of seconds the last auth exec plugin client certificate lived before being rotated. If auth exec plugin client certificates are unused, histogram will contain no data. * Stability Level:ALPHA * Type: Histogram rest\_client\_exec\_plugin\_policy\_call\_total Number of comparisons of an exec plugin to the plugin policy and allowlist (if any), partitioned by whether or not the policy permits the plugin * Stability Level:ALPHA * Type: Counter * Labels:alloweddenied rest\_client\_exec\_plugin\_ttl\_seconds Gauge of the shortest TTL (time-to-live) of the client certificate(s) managed by the auth exec plugin. The value is in seconds until certificate expiry (negative if already expired). If auth exec plugins are unused or manage no TLS certificates, the value will be +INF. * Stability Level:ALPHA * Type: Gauge rest\_client\_rate\_limiter\_duration\_seconds Client side rate limiter latency in seconds. Broken down by verb, and host. * Stability Level:ALPHA * Type: Histogram * Labels:hostverb rest\_client\_request\_duration\_seconds Request latency in seconds. Broken down by verb, and host. * Stability Level:ALPHA * Type: Histogram * Labels:hostverb rest\_client\_request\_retries\_total Number of request retries, partitioned by status code, verb, and host. * Stability Level:ALPHA * Type: Counter * Labels:codehostverb rest\_client\_request\_size\_bytes Request size in bytes. Broken down by verb and host. * Stability Level:ALPHA * Type: Histogram * Labels:hostverb rest\_client\_requests\_total Number of HTTP requests, partitioned by status code, method, and host. * Stability Level:ALPHA * Type: Counter *
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.244878
code, verb, and host. * Stability Level:ALPHA * Type: Counter * Labels:codehostverb rest\_client\_request\_size\_bytes Request size in bytes. Broken down by verb and host. * Stability Level:ALPHA * Type: Histogram * Labels:hostverb rest\_client\_requests\_total Number of HTTP requests, partitioned by status code, method, and host. * Stability Level:ALPHA * Type: Counter * Labels:codehostmethod rest\_client\_response\_size\_bytes Response size in bytes. Broken down by verb and host. * Stability Level:ALPHA * Type: Histogram * Labels:hostverb rest\_client\_transport\_cache\_entries Number of transport entries in the internal cache. * Stability Level:ALPHA * Type: Gauge rest\_client\_transport\_create\_calls\_total Number of calls to get a new transport, partitioned by the result of the operation hit: obtained from the cache, miss: created and added to the cache, uncacheable: created and not cached * Stability Level:ALPHA * Type: Counter * Labels:result retroactive\_storageclass\_errors\_total Total number of failed retroactive StorageClass assignments to persistent volume claim * Stability Level:ALPHA * Type: Counter retroactive\_storageclass\_total Total number of retroactive StorageClass assignments to persistent volume claim * Stability Level:ALPHA * Type: Counter root\_ca\_cert\_publisher\_sync\_duration\_seconds Number of namespace syncs happened in root ca cert publisher. * Stability Level:ALPHA * Type: Histogram * Labels:code root\_ca\_cert\_publisher\_sync\_total Number of namespace syncs happened in root ca cert publisher. * Stability Level:ALPHA * Type: Counter * Labels:code running\_managed\_controllers Indicates where instances of a controller are currently running * Stability Level:ALPHA * Type: Gauge * Labels:managername scheduler\_async\_api\_call\_execution\_duration\_seconds Duration in seconds for executing API call in the async dispatcher. * Stability Level:ALPHA * Type: Histogram * Labels:call\_typeresult scheduler\_async\_api\_call\_execution\_total Total number of API calls executed by the async dispatcher. * Stability Level:ALPHA * Type: Counter * Labels:call\_typeresult scheduler\_batch\_attempts\_total Counts of results when we attempt to use batching. * Stability Level:ALPHA * Type: Counter * Labels:profileresult scheduler\_batch\_cache\_flushed\_total Counts of cache flushes by reason. * Stability Level:ALPHA * Type: Counter * Labels:profilereason scheduler\_cache\_size Number of nodes, pods, and assumed (bound) pods in the scheduler cache. * Stability Level:ALPHA * Type: Gauge * Labels:type scheduler\_event\_handling\_duration\_seconds Event handling latency in seconds. * Stability Level:ALPHA * Type: Histogram * Labels:event scheduler\_get\_node\_hint\_duration\_seconds Latency for getting a node hint. * Stability Level:ALPHA * Type: Histogram * Labels:hintedprofile scheduler\_goroutines Number of running goroutines split by the work they do such as binding. * Stability Level:ALPHA * Type: Gauge * Labels:operation scheduler\_inflight\_events Number of events currently tracked in the scheduling queue. * Stability Level:ALPHA * Type: Gauge * Labels:event scheduler\_pending\_async\_api\_calls Number of API calls currently pending in the async queue. * Stability Level:ALPHA * Type: Gauge * Labels:call\_type scheduler\_permit\_wait\_duration\_seconds Duration of waiting on permit. * Stability Level:ALPHA * Type: Histogram * Labels:result scheduler\_plugin\_evaluation\_total Number of attempts to schedule pods by each plugin and the extension point (available only in PreFilter, Filter, PreScore, and Score). * Stability Level:ALPHA * Type: Counter * Labels:extension\_pointpluginprofile scheduler\_plugin\_execution\_duration\_seconds Duration for running a plugin at a specific extension point. * Stability Level:ALPHA * Type: Histogram * Labels:extension\_pointpluginstatus scheduler\_preemption\_goroutines\_duration\_seconds Duration in seconds for running goroutines for the preemption. * Stability Level:ALPHA * Type: Histogram * Labels:result scheduler\_preemption\_goroutines\_execution\_total Number of preemption goroutines executed. * Stability Level:ALPHA * Type: Counter * Labels:result scheduler\_queueing\_hint\_execution\_duration\_seconds Duration for running a queueing hint function of a plugin. * Stability Level:ALPHA * Type: Histogram * Labels:eventhintplugin scheduler\_resourceclaim\_creates\_total Number of ResourceClaims creation requests within scheduler * Stability Level:ALPHA * Type: Counter * Labels:status scheduler\_scheduling\_algorithm\_duration\_seconds Scheduling algorithm latency in seconds * Stability Level:ALPHA * Type: Histogram scheduler\_store\_schedule\_results\_duration\_seconds Latency for getting a no. * Stability Level:ALPHA * Type: Histogram * Labels:profile scheduler\_unschedulable\_pods The number of unschedulable pods broken down by plugin name. A pod will increment the gauge for all plugins that caused it to not schedule and so this metric have meaning only when broken down by plugin. * Stability Level:ALPHA * Type: Gauge * Labels:pluginprofile
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.194053
Type: Histogram * Labels:profile scheduler\_unschedulable\_pods The number of unschedulable pods broken down by plugin name. A pod will increment the gauge for all plugins that caused it to not schedule and so this metric have meaning only when broken down by plugin. * Stability Level:ALPHA * Type: Gauge * Labels:pluginprofile scheduler\_volume\_binder\_cache\_requests\_total Total number for request volume binding cache * Stability Level:ALPHA * Type: Counter * Labels:operation scheduler\_volume\_scheduling\_stage\_error\_total Volume scheduling stage error count * Stability Level:ALPHA * Type: Counter * Labels:operation scrape\_error 1 if there was an error while getting container metrics, 0 otherwise * Stability Level:ALPHA * Type: Custom * Deprecated Versions:1.29.0 selinux\_warning\_controller\_selinux\_volume\_conflict Conflict between two Pods using the same volume * Stability Level:ALPHA * Type: Custom * Labels:propertypod1\_namespacepod1\_namepod1\_valuepod2\_namespacepod2\_namepod2\_value service\_controller\_loadbalancer\_sync\_total A metric counting the amount of times any load balancer has been configured, as an effect of service/node changes on the cluster * Stability Level:ALPHA * Type: Counter service\_controller\_nodesync\_error\_total A metric counting the amount of times any load balancer has been configured and errored, as an effect of node changes on the cluster * Stability Level:ALPHA * Type: Counter service\_controller\_nodesync\_latency\_seconds A metric measuring the latency for nodesync which updates loadbalancer hosts on cluster node updates. * Stability Level:ALPHA * Type: Histogram service\_controller\_update\_loadbalancer\_host\_latency\_seconds A metric measuring the latency for updating each load balancer hosts. * Stability Level:ALPHA * Type: Histogram serviceaccount\_invalid\_legacy\_auto\_token\_uses\_total Cumulative invalid auto-generated legacy tokens used * Stability Level:ALPHA * Type: Counter serviceaccount\_legacy\_auto\_token\_uses\_total Cumulative auto-generated legacy tokens used * Stability Level:ALPHA * Type: Counter serviceaccount\_legacy\_manual\_token\_uses\_total Cumulative manually created legacy tokens used * Stability Level:ALPHA * Type: Counter serviceaccount\_legacy\_tokens\_total Cumulative legacy service account tokens used * Stability Level:ALPHA * Type: Counter serviceaccount\_stale\_tokens\_total Cumulative stale projected service account tokens used * Stability Level:ALPHA * Type: Counter serviceaccount\_valid\_tokens\_total Cumulative valid projected service account tokens used * Stability Level:ALPHA * Type: Counter statefulset\_controller\_statefulset\_max\_unavailable Maximum number of unavailable pods allowed during StatefulSet rolling updates * Stability Level:ALPHA * Type: Gauge * Labels:pod\_management\_policystatefulset\_namestatefulset\_namespace statefulset\_controller\_statefulset\_unavailable\_replicas Current number of unavailable pods in StatefulSet * Stability Level:ALPHA * Type: Gauge * Labels:pod\_management\_policystatefulset\_namestatefulset\_namespace storage\_count\_attachable\_volumes\_in\_use Measure number of volumes in use * Stability Level:ALPHA * Type: Custom * Labels:nodevolume\_plugin storage\_operation\_duration\_seconds Storage operation duration * Stability Level:ALPHA * Type: Histogram * Labels:migratedoperation\_namestatusvolume\_plugin taint\_eviction\_controller\_pod\_deletion\_duration\_seconds Latency, in seconds, between the time when a taint effect has been activated for the Pod and its deletion via TaintEvictionController. * Stability Level:ALPHA * Type: Histogram taint\_eviction\_controller\_pod\_deletions\_total Total number of Pods deleted by TaintEvictionController since its start. * Stability Level:ALPHA * Type: Counter ttl\_after\_finished\_controller\_job\_deletion\_duration\_seconds The time it took to delete the job since it became eligible for deletion * Stability Level:ALPHA * Type: Histogram version\_info Provides the compatibility version info of the component. The component label is the name of the component, usually kube, but is relevant for aggregated-apiservers. * Stability Level:ALPHA * Type: Gauge * Labels:binarycomponentemulationmin\_compat volume\_manager\_selinux\_container\_errors\_total Number of errors when kubelet cannot compute SELinux context for a container. Kubelet can't start such a Pod then and it will retry, therefore value of this metric may not represent the actual nr. of containers. * Stability Level:ALPHA * Type: Gauge * Labels:access\_mode volume\_manager\_selinux\_container\_warnings\_total Number of errors when kubelet cannot compute SELinux context for a container that are ignored. They will become real errors when SELinuxMountReadWriteOncePod feature is expanded to all volume access modes. * Stability Level:ALPHA * Type: Gauge * Labels:access\_mode volume\_manager\_selinux\_pod\_context\_mismatch\_errors\_total Number of errors when a Pod defines different SELinux contexts for its containers that use the same volume. Kubelet can't start such a Pod then and it will retry, therefore value of this metric may not represent the actual nr. of Pods. * Stability Level:ALPHA * Type: Gauge * Labels:access\_mode volume\_manager\_selinux\_pod\_context\_mismatch\_warnings\_total Number of errors when a
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.200408
defines different SELinux contexts for its containers that use the same volume. Kubelet can't start such a Pod then and it will retry, therefore value of this metric may not represent the actual nr. of Pods. * Stability Level:ALPHA * Type: Gauge * Labels:access\_mode volume\_manager\_selinux\_pod\_context\_mismatch\_warnings\_total Number of errors when a Pod defines different SELinux contexts for its containers that use the same volume. They are not errors yet, but they will become real errors when SELinuxMountReadWriteOncePod feature is expanded to all volume access modes. * Stability Level:ALPHA * Type: Gauge * Labels:access\_mode volume\_manager\_selinux\_volume\_context\_mismatch\_errors\_total Number of errors when a Pod uses a volume that is already mounted with a different SELinux context than the Pod needs. Kubelet can't start such a Pod then and it will retry, therefore value of this metric may not represent the actual nr. of Pods. * Stability Level:ALPHA * Type: Gauge * Labels:access\_modevolume\_plugin volume\_manager\_selinux\_volume\_context\_mismatch\_warnings\_total Number of errors when a Pod uses a volume that is already mounted with a different SELinux context than the Pod needs. They are not errors yet, but they will become real errors when SELinuxMountReadWriteOncePod feature is expanded to all volume access modes. * Stability Level:ALPHA * Type: Gauge * Labels:access\_modevolume\_plugin volume\_manager\_selinux\_volumes\_admitted\_total Number of volumes whose SELinux context was fine and will be mounted with mount -o context option. * Stability Level:ALPHA * Type: Gauge * Labels:access\_modevolume\_plugin volume\_manager\_total\_volumes Number of volumes in Volume Manager * Stability Level:ALPHA * Type: Custom * Labels:plugin\_namestate volume\_operation\_total\_errors Total volume operation errors * Stability Level:ALPHA * Type: Counter * Labels:operation\_nameplugin\_name volume\_operation\_total\_seconds Storage operation end to end duration in seconds * Stability Level:ALPHA * Type: Histogram * Labels:operation\_nameplugin\_name watch\_cache\_capacity Total capacity of watch cache broken by resource type. * Stability Level:ALPHA * Type: Gauge * Labels:groupresource watch\_cache\_capacity\_decrease\_total Total number of watch cache capacity decrease events broken by resource type. * Stability Level:ALPHA * Type: Counter * Labels:groupresource watch\_cache\_capacity\_increase\_total Total number of watch cache capacity increase events broken by resource type. * Stability Level:ALPHA * Type: Counter * Labels:groupresource workqueue\_adds\_total Total number of adds handled by workqueue * Stability Level:ALPHA * Type: Counter * Labels:name workqueue\_depth Current depth of workqueue * Stability Level:ALPHA * Type: Gauge * Labels:name workqueue\_longest\_running\_processor\_seconds How many seconds has the longest running processor for workqueue been running. * Stability Level:ALPHA * Type: Gauge * Labels:name workqueue\_queue\_duration\_seconds How long in seconds an item stays in workqueue before being requested. * Stability Level:ALPHA * Type: Histogram * Labels:name workqueue\_retries\_total Total number of retries handled by workqueue * Stability Level:ALPHA * Type: Counter * Labels:name workqueue\_unfinished\_work\_seconds How many seconds of work has done that is in progress and hasn't been observed by work\_duration. Large values indicate stuck threads. One can deduce the number of stuck threads by observing the rate at which this increases. * Stability Level:ALPHA * Type: Gauge * Labels:name workqueue\_work\_duration\_seconds How long in seconds processing an item from workqueue takes. * Stability Level:ALPHA * Type: Histogram * Labels:name
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/metrics.md
main
kubernetes
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0.19006
{{< feature-state for\_k8s\_version="v1.34" state="beta" >}} As a beta feature, Kubernetes lets you configure the kubelet to collect Linux kernel [Pressure Stall Information](https://docs.kernel.org/accounting/psi.html) (PSI) for CPU, memory, and I/O usage. The information is collected at node, pod and container level. This feature is enabled by default by setting the `KubeletPSI` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/). PSI metrics are exposed through two different sources: - The kubelet's [Summary API](/docs/reference/config-api/kubelet-stats.v1alpha1/), which provides PSI data at the node, pod, and container level. - The `/metrics/cadvisor` endpoint on the kubelet, which exposes PSI metrics in the [Prometheus format](/docs/concepts/cluster-administration/system-metrics#psi-metrics). ### Requirements Pressure Stall Information requires the following on your Linux nodes: - The Linux kernel must be version \*\*4.20 or newer\*\*. - The kernel must be compiled with the `CONFIG\_PSI=y` option. Most modern distributions enable this by default. You can check your kernel's configuration by running `zgrep CONFIG\_PSI /proc/config.gz`. - Some Linux distributions may compile PSI into the kernel but disable it by default. If so, you need to enable it at boot time by adding the `psi=1` parameter to the kernel command line. - The node must be using [cgroup v2](/docs/concepts/architecture/cgroups). ## Understanding PSI Metrics Pressure Stall Information (PSI) metrics are provided for three resources: CPU, memory, and I/O. They are categorized into two main types of pressure: `some` and `full`. \* \*\*`some`\*\*: This value indicates that some tasks (one or more) are stalled on a resource. For example, if some tasks are waiting for I/O, this metric will increase. This can be an early indicator of resource contention. \* \*\*`full`\*\*: This value indicates that \*all\* non-idle tasks are stalled on a resource simultaneously. This signifies a more severe resource shortage, where the entire system is unable to make progress. Each pressure type provides four metrics: `avg10`, `avg60`, `avg300`, and `total`. The `avg` values represent the percentage of wall-clock time that tasks were stalled over 10-second, 60-second, and 5-minute moving averages. The `total` value is a cumulative counter in microseconds showing the total time tasks have been stalled. ## Example Scenarios You can use a simple Pod with a stress-testing tool to generate resource pressure and observe the PSI metrics. The following examples use the `agnhost` container image, which includes the `stress` tool. ### Generating CPU Pressure Create a Pod that generates CPU pressure using the `stress` utility. This workload will put a heavy load on one CPU core. Create a file named `cpu-pressure-pod.yaml`: ```yaml apiVersion: v1 kind: Pod metadata: name: cpu-pressure-pod spec: restartPolicy: Never containers: - name: cpu-stress image: registry.k8s.io/e2e-test-images/agnhost:2.47 args: - "stress" - "--cpus" - "1" resources: limits: cpu: "500m" requests: cpu: "500m" ``` Apply it to your cluster: `kubectl apply -f cpu-pressure-pod.yaml` #### Observing CPU Pressure After the Pod is running, you can observe the CPU pressure through either the Summary API or the Prometheus metrics endpoint. \*\*Using the Summary API:\*\* Watch the summary stats for your node. In a separate terminal, run: ```shell # Replace with the name of a node in your cluster kubectl get --raw "/api/v1/nodes//proxy/stats/summary" | jq '.pods[] | select(.podRef.name | contains("cpu-pressure-pod"))' ``` You will see the `some` PSI metrics for CPU increase in the summary API output. The `avg10` value for `some` pressure should rise above zero, indicating that tasks are spending time stalled on the CPU. \*\*Using the Prometheus metrics endpoint:\*\* Query the `/metrics/cadvisor` endpoint to see the `container\_pressure\_cpu\_waiting\_seconds\_total` metric. ```shell # Replace with the name of the node where the pod is running kubectl get --raw "/api/v1/nodes//proxy/metrics/cadvisor" | \ grep 'container\_pressure\_cpu\_waiting\_seconds\_total{container="cpu-stress"' ``` The output should show an increasing value, indicating that the container is spending time stalled waiting for CPU resources. #### Cleanup Clean up the Pod when
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/understand-psi-metrics.md
main
kubernetes
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0.19525
metric. ```shell # Replace with the name of the node where the pod is running kubectl get --raw "/api/v1/nodes//proxy/metrics/cadvisor" | \ grep 'container\_pressure\_cpu\_waiting\_seconds\_total{container="cpu-stress"' ``` The output should show an increasing value, indicating that the container is spending time stalled waiting for CPU resources. #### Cleanup Clean up the Pod when you are finished: ```shell kubectl delete pod cpu-pressure-pod ``` ### Generating Memory Pressure This example creates a Pod that continuously writes to files in the container's writable layer, causing the kernel's page cache to grow and forcing memory reclamation, which generates pressure. Create a file named `memory-pressure-pod.yaml`: ```yaml apiVersion: v1 kind: Pod metadata: name: memory-pressure-pod spec: restartPolicy: Never containers: - name: memory-stress image: registry.k8s.io/e2e-test-images/agnhost:2.47 command: ["/bin/sh", "-c"] args: - "i=0; while true; do dd if=/dev/zero of=testfile.$i bs=1M count=50 &>/dev/null; i=$(((i+1)%5)); sleep 0.1; done" resources: limits: memory: "200M" requests: memory: "200M" ``` Apply it to your cluster: `kubectl apply -f memory-pressure-pod.yaml` #### Observing Memory Pressure \*\*Using the Summary API:\*\* In the summary output, you will observe an increase in the `full` PSI metrics for memory, indicating that the system is under significant memory pressure. ```shell # Replace with the name of a node in your cluster kubectl get --raw "/api/v1/nodes//proxy/stats/summary" | jq '.pods[] | select(.podRef.name | contains("memory-pressure-pod"))' ``` \*\*Using the Prometheus metrics endpoint:\*\* Query the `/metrics/cadvisor` endpoint to see the `container\_pressure\_memory\_waiting\_seconds\_total` metric. ```shell # Replace with the name of the node where the pod is running kubectl get --raw "/api/v1/nodes//proxy/metrics/cadvisor" | \ grep 'container\_pressure\_memory\_waiting\_seconds\_total{container="memory-stress"' ``` In the output, you will observe an increasing value for the metric, indicating that the system is under significant memory pressure. #### Cleanup Clean up the Pod when you are finished: ```shell kubectl delete pod memory-pressure-pod ``` ### Generating I/O Pressure This Pod generates I/O pressure by repeatedly writing a file to disk and using `sync` to flush the data from memory, which creates I/O stalls. Create a file named `io-pressure-pod.yaml`: ```yaml apiVersion: v1 kind: Pod metadata: name: io-pressure-pod spec: restartPolicy: Never containers: - name: io-stress image: registry.k8s.io/e2e-test-images/agnhost:2.47 command: ["/bin/sh", "-c"] args: - "while true; do dd if=/dev/zero of=testfile bs=1M count=128 &>/dev/null; sync; rm testfile &>/dev/null; done" ``` Apply this to your cluster: `kubectl apply -f io-pressure-pod.yaml` #### Observing I/O Pressure \*\*Using the Summary API:\*\* You will see the `some` PSI metrics for I/O increase as the Pod continuously writes to disk. ```shell # Replace with the name of a node in your cluster kubectl get --raw "/api/v1/nodes//proxy/stats/summary" | jq '.pods[] | select(.podRef.name | contains("io-pressure-pod"))' ``` \*\*Using the Prometheus metrics endpoint:\*\* Query the `/metrics/cadvisor` endpoint to see the `container\_pressure\_io\_waiting\_seconds\_total` metric. ```shell # Replace with the name of the node where the pod is running kubectl get --raw "/api/v1/nodes//proxy/metrics/cadvisor" | \ grep 'container\_pressure\_io\_waiting\_seconds\_total{container="io-stress"' ``` You will see the metric's value increase as the Pod continuously writes to disk. #### Cleanup Clean up the Pod when you are finished: ```shell kubectl delete pod io-pressure-pod ``` ## {{% heading "whatsnext" %}} The task pages for [Troubleshooting Clusters](/docs/tasks/debug/debug-cluster/) discuss how to use a metrics pipeline that rely on these data.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/instrumentation/understand-psi-metrics.md
main
kubernetes
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0.204912
{{< caution >}} `kubeadm alpha` provides a preview of a set of features made available for gathering feedback from the community. Please try it out and give us feedback! {{< /caution >}} Currently there are no experimental commands under `kubeadm alpha`. ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join`
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-alpha.md
main
kubernetes
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0.117945
This command initializes a Kubernetes control plane node. {{< include "generated/kubeadm\_init/\_index.md" >}} ### Init workflow {#init-workflow} `kubeadm init` bootstraps a Kubernetes control plane node by executing the following steps: 1. Runs a series of pre-flight checks to validate the system state before making changes. Some checks only trigger warnings, others are considered errors and will exit kubeadm until the problem is corrected or the user specifies `--ignore-preflight-errors=`. 1. Generates a self-signed CA to set up identities for each component in the cluster. The user can provide their own CA cert and/or key by dropping it in the cert directory configured via `--cert-dir` (`/etc/kubernetes/pki` by default). The API server certs will have additional SAN entries for any `--apiserver-cert-extra-sans` arguments, lowercased if necessary. 1. Writes kubeconfig files in `/etc/kubernetes/` for the kubelet, the controller-manager, and the scheduler to connect to the API server, each with its own identity. Also additional kubeconfig files are written, for kubeadm as administrative entity (`admin.conf`) and for a super admin user that can bypass RBAC (`super-admin.conf`). 1. Generates static Pod manifests for the API server, controller-manager and scheduler. In case an external etcd is not provided, an additional static Pod manifest is generated for etcd. Static Pod manifests are written to `/etc/kubernetes/manifests`; the kubelet watches this directory for Pods to create on startup. Once control plane Pods are up and running, the `kubeadm init` sequence can continue. 1. Apply labels and taints to the control plane node so that no additional workloads will run there. 1. Generates the token that additional nodes can use to register themselves with a control plane in the future. Optionally, the user can provide a token via `--token`, as described in the [kubeadm token](/docs/reference/setup-tools/kubeadm/kubeadm-token/) documents. 1. Makes all the necessary configurations for allowing node joining with the [Bootstrap Tokens](/docs/reference/access-authn-authz/bootstrap-tokens/) and [TLS Bootstrap](/docs/reference/access-authn-authz/kubelet-tls-bootstrapping/) mechanism: - Write a ConfigMap for making available all the information required for joining, and set up related RBAC access rules. - Let Bootstrap Tokens access the CSR signing API. - Configure auto-approval for new CSR requests. See [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) for additional information. 1. Installs a DNS server (CoreDNS) and the kube-proxy addon components via the API server. In Kubernetes version 1.11 and later CoreDNS is the default DNS server. Please note that although the DNS server is deployed, it will not be scheduled until CNI is installed. {{< warning >}} kube-dns usage with kubeadm is deprecated as of v1.18 and is removed in v1.21. {{< /warning >}} ### Using init phases with kubeadm {#init-phases} kubeadm allows you to create a control plane node in phases using the `kubeadm init phase` command. To view the ordered list of phases and sub-phases you can call `kubeadm init --help`. The list will be located at the top of the help screen and each phase will have a description next to it. Note that by calling `kubeadm init` all of the phases and sub-phases will be executed in this exact order. Some phases have unique flags, so if you want to have a look at the list of available options add `--help`, for example: ```shell sudo kubeadm init phase control-plane controller-manager --help ``` You can also use `--help` to see the list of sub-phases for a certain parent phase: ```shell sudo kubeadm init phase control-plane --help ``` `kubeadm init` also exposes a flag called `--skip-phases` that can be used to skip certain phases. The flag accepts a list of phase names and the names can be taken from the above ordered list. An example: ```shell sudo kubeadm init phase control-plane all --config=configfile.yaml sudo kubeadm init phase etcd local --config=configfile.yaml # you can now
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-init.md
main
kubernetes
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0.110095
called `--skip-phases` that can be used to skip certain phases. The flag accepts a list of phase names and the names can be taken from the above ordered list. An example: ```shell sudo kubeadm init phase control-plane all --config=configfile.yaml sudo kubeadm init phase etcd local --config=configfile.yaml # you can now modify the control plane and etcd manifest files sudo kubeadm init --skip-phases=control-plane,etcd --config=configfile.yaml ``` What this example would do is write the manifest files for the control plane and etcd in `/etc/kubernetes/manifests` based on the configuration in `configfile.yaml`. This allows you to modify the files and then skip these phases using `--skip-phases`. By calling the last command you will create a control plane node with the custom manifest files. {{< feature-state for\_k8s\_version="v1.22" state="beta" >}} Alternatively, you can use the `skipPhases` field under `InitConfiguration`. ### Using kubeadm init with a configuration file {#config-file} {{< caution >}} The configuration file is still considered beta and may change in future versions. {{< /caution >}} It's possible to configure `kubeadm init` with a configuration file instead of command line flags, and some more advanced features may only be available as configuration file options. This file is passed using the `--config` flag and it must contain a `ClusterConfiguration` structure and optionally more structures separated by `---\n`. Mixing `--config` with others flags may not be allowed in some cases. The default configuration can be printed out using the [kubeadm config print](/docs/reference/setup-tools/kubeadm/kubeadm-config/) command. If your configuration is not using the latest version it is \*\*recommended\*\* that you migrate using the [kubeadm config migrate](/docs/reference/setup-tools/kubeadm/kubeadm-config/) command. For more information on the fields and usage of the configuration you can navigate to our [API reference page](/docs/reference/config-api/kubeadm-config.v1beta4/). ### Using kubeadm init with feature gates {#feature-gates} kubeadm supports a set of feature gates that are unique to kubeadm and can only be applied during cluster creation with `kubeadm init`. These features can control the behavior of the cluster. Feature gates are removed after a feature graduates to GA. To pass a feature gate you can either use the `--feature-gates` flag for `kubeadm init`, or you can add items into the `featureGates` field when you pass a [configuration file](/docs/reference/config-api/kubeadm-config.v1beta4/#kubeadm-k8s-io-v1beta4-ClusterConfiguration) using `--config`. Passing [feature gates for core Kubernetes components](/docs/reference/command-line-tools-reference/feature-gates) directly to kubeadm is not supported. Instead, it is possible to pass them by [Customizing components with the kubeadm API](/docs/setup/production-environment/tools/kubeadm/control-plane-flags/). List of feature gates: {{< table caption="kubeadm feature gates" >}} Feature | Default | Alpha | Beta | GA :-------|:--------|:------|:-----|:---- `ControlPlaneKubeletLocalMode` | `true` | 1.31 | 1.33 | - `NodeLocalCRISocket` | `true` | 1.32 | 1.34 | - {{< /table >}} {{< note >}} Once a feature gate goes GA its value becomes locked to `true` by default. {{< /note >}} Feature gate descriptions: `ControlPlaneKubeletLocalMode` : With this feature gate enabled, when joining a new control plane node, kubeadm will configure the kubelet to connect to the local kube-apiserver. This ensures that there will not be a violation of the version skew policy during rolling upgrades. `NodeLocalCRISocket` : With this feature gate enabled, kubeadm will read/write the CRI socket for each node from/to the file `/var/lib/kubelet/instance-config.yaml` instead of reading/writing it from/to the annotation `kubeadm.alpha.kubernetes.io/cri-socket` on the Node object. The new file is applied as an instance configuration patch, before any other user managed patches are applied when the `--patches` flag is used. It contains a single field `containerRuntimeEndpoint` from the [KubeletConfiguration file format](/docs/reference/config-api/kubelet-config.v1beta1/). If the feature gate is enabled during upgrade, but the file `/var/lib/kubelet/instance-config.yaml` does not exist yet, kubeadm will attempt to read the CRI socket value from the file `/var/lib/kubelet/kubeadm-flags.env`. List of deprecated feature gates: {{< table caption="kubeadm deprecated feature gates" >}} Feature
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-init.md
main
kubernetes
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0.042352
single field `containerRuntimeEndpoint` from the [KubeletConfiguration file format](/docs/reference/config-api/kubelet-config.v1beta1/). If the feature gate is enabled during upgrade, but the file `/var/lib/kubelet/instance-config.yaml` does not exist yet, kubeadm will attempt to read the CRI socket value from the file `/var/lib/kubelet/kubeadm-flags.env`. List of deprecated feature gates: {{< table caption="kubeadm deprecated feature gates" >}} Feature | Default | Alpha | Beta | GA | Deprecated :-------|:--------|:------|:-----|:---|:---------- `PublicKeysECDSA` | `false` | 1.19 | - | - | 1.31 `RootlessControlPlane` | `false` | 1.22 | - | - | 1.31 {{< /table >}} Feature gate descriptions: `PublicKeysECDSA` : Can be used to create a cluster that uses ECDSA certificates instead of the default RSA algorithm. Renewal of existing ECDSA certificates is also supported using `kubeadm certs renew`, but you cannot switch between the RSA and ECDSA algorithms on the fly or during upgrades. Kubernetes versions before v1.31 had a bug where keys in generated kubeconfig files were set use RSA, even when you had enabled the `PublicKeysECDSA` feature gate. This feature gate is deprecated in favor of the `encryptionAlgorithm` functionality available in kubeadm v1beta4. `RootlessControlPlane` : Setting this flag configures the kubeadm deployed control plane component static Pod containers for `kube-apiserver`, `kube-controller-manager`, `kube-scheduler` and `etcd` to run as non-root users. If the flag is not set, those components run as root. You can change the value of this feature gate before you upgrade to a newer version of Kubernetes. List of removed feature gates: {{< table caption="kubeadm removed feature gates" >}} Feature | Alpha | Beta | GA | Removed :-------|:------|:-----|:---|:------- `EtcdLearnerMode` | 1.27 | 1.29 | 1.32 | 1.33 `IPv6DualStack` | 1.16 | 1.21 | 1.23 | 1.24 `UnversionedKubeletConfigMap` | 1.22 | 1.23 | 1.25 | 1.26 `UpgradeAddonsBeforeControlPlane` | 1.28 | - | - | 1.31 `WaitForAllControlPlaneComponents` | 1.30 | 1.33 | 1.34 | 1.35 {{< /table >}} Feature gate descriptions: `EtcdLearnerMode` : When joining a new control plane node, a new etcd member will be created as a learner and promoted to a voting member only after the etcd data are fully aligned. `IPv6DualStack` : This flag helps to configure components dual stack when the feature is in progress. For more details on Kubernetes dual-stack support see [Dual-stack support with kubeadm](/docs/setup/production-environment/tools/kubeadm/dual-stack-support/). `UnversionedKubeletConfigMap` : This flag controls the name of the {{< glossary\_tooltip text="ConfigMap" term\_id="configmap" >}} where kubeadm stores kubelet configuration data. With this flag not specified or set to `true`, the ConfigMap is named `kubelet-config`. If you set this flag to `false`, the name of the ConfigMap includes the major and minor version for Kubernetes (for example: `kubelet-config-{{< skew currentVersion >}}`). Kubeadm ensures that RBAC rules for reading and writing that ConfigMap are appropriate for the value you set. When kubeadm writes this ConfigMap (during `kubeadm init` or `kubeadm upgrade apply`), kubeadm respects the value of `UnversionedKubeletConfigMap`. When reading that ConfigMap (during `kubeadm join`, `kubeadm reset`, `kubeadm upgrade`...), kubeadm attempts to use unversioned ConfigMap name first. If that does not succeed, kubeadm falls back to using the legacy (versioned) name for that ConfigMap. `UpgradeAddonsBeforeControlPlane` : This feature gate has been removed. It was introduced in v1.28 as a deprecated feature and then removed in v1.31. For documentation on older versions, please switch to the corresponding website version. `WaitForAllControlPlaneComponents` : With this feature gate enabled, kubeadm will wait for all control plane components (kube-apiserver, kube-controller-manager, kube-scheduler) on a control plane node to report status 200 on their `/livez` or `/healthz` endpoints. These checks are performed on `https://ADDRESS:PORT/ENDPOINT`. - `PORT` is taken from `--secure-port` of a component. - `ADDRESS` is `--advertise-address` for kube-apiserver and `--bind-address` for the kube-controller-manager and kube-scheduler. - `ENDPOINT` is only `/healthz` for kube-controller-manager
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-init.md
main
kubernetes
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0.060237
on a control plane node to report status 200 on their `/livez` or `/healthz` endpoints. These checks are performed on `https://ADDRESS:PORT/ENDPOINT`. - `PORT` is taken from `--secure-port` of a component. - `ADDRESS` is `--advertise-address` for kube-apiserver and `--bind-address` for the kube-controller-manager and kube-scheduler. - `ENDPOINT` is only `/healthz` for kube-controller-manager until it supports `/livez` as well. If you specify custom `ADDRESS` or `PORT` in the kubeadm configuration they will be respected. Without the feature gate enabled, kubeadm will only wait for the kube-apiserver on a control plane node to become ready. The wait process starts right after the kubelet on the host is started by kubeadm. You are advised to enable this feature gate in case you wish to observe a ready state from all control plane components during the `kubeadm init` or `kubeadm join` command execution. ### Adding kube-proxy parameters {#kube-proxy} For information about kube-proxy parameters in the kubeadm configuration see: - [kube-proxy reference](/docs/reference/config-api/kube-proxy-config.v1alpha1/) For information about enabling IPVS mode with kubeadm see: - [IPVS](https://github.com/kubernetes/kubernetes/blob/master/pkg/proxy/ipvs/README.md) ### Passing custom flags to control plane components {#control-plane-flags} For information about passing flags to control plane components see: - [control-plane-flags](/docs/setup/production-environment/tools/kubeadm/control-plane-flags/) ### Running kubeadm without an Internet connection {#without-internet-connection} For running kubeadm without an Internet connection you have to pre-pull the required control plane images. You can list and pull the images using the `kubeadm config images` sub-command: ```shell kubeadm config images list kubeadm config images pull ``` You can pass `--config` to the above commands with a [kubeadm configuration file](#config-file) to control the `kubernetesVersion` and `imageRepository` fields. All default `registry.k8s.io` images that kubeadm requires support multiple architectures. ### Using custom images {#custom-images} By default, kubeadm pulls images from `registry.k8s.io`. If the requested Kubernetes version is a CI label (such as `ci/latest`) `gcr.io/k8s-staging-ci-images` is used. You can override this behavior by using [kubeadm with a configuration file](#config-file). Allowed customization are: \* To provide `kubernetesVersion` which affects the version of the images. \* To provide an alternative `imageRepository` to be used instead of `registry.k8s.io`. \* To provide a specific `imageRepository` and `imageTag` for etcd or CoreDNS. Image paths between the default `registry.k8s.io` and a custom repository specified using `imageRepository` may differ for backwards compatibility reasons. For example, one image might have a subpath at `registry.k8s.io/subpath/image`, but be defaulted to `my.customrepository.io/image` when using a custom repository. To ensure you push the images to your custom repository in paths that kubeadm can consume, you must: \* Pull images from the defaults paths at `registry.k8s.io` using `kubeadm config images {list|pull}`. \* Push images to the paths from `kubeadm config images list --config=config.yaml`, where `config.yaml` contains the custom `imageRepository`, and/or `imageTag` for etcd and CoreDNS. \* Pass the same `config.yaml` to `kubeadm init`. #### Custom sandbox (pause) images {#custom-pause-image} To set a custom image for these you need to configure this in your {{< glossary\_tooltip text="container runtime" term\_id="container-runtime" >}} to use the image. Consult the documentation for your container runtime to find out how to change this setting; for selected container runtimes, you can also find advice within the [Container Runtimes](/docs/setup/production-environment/container-runtimes/) topic. ### Uploading control plane certificates to the cluster By adding the flag `--upload-certs` to `kubeadm init` you can temporary upload the control plane certificates to a Secret in the cluster. Please note that this Secret will expire automatically after 2 hours. The certificates are encrypted using a 32byte key that can be specified using `--certificate-key`. The same key can be used to download the certificates when additional control plane nodes are joining, by passing `--control-plane` and `--certificate-key` to `kubeadm join`. The following phase command can be used to re-upload the certificates after expiration: ```shell kubeadm init phase
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-init.md
main
kubernetes
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0.052042
32byte key that can be specified using `--certificate-key`. The same key can be used to download the certificates when additional control plane nodes are joining, by passing `--control-plane` and `--certificate-key` to `kubeadm join`. The following phase command can be used to re-upload the certificates after expiration: ```shell kubeadm init phase upload-certs --upload-certs --config=SOME\_YAML\_FILE ``` {{< note >}} A predefined `certificateKey` can be provided in `InitConfiguration` when passing the [configuration file](/docs/reference/config-api/kubeadm-config.v1beta4/) with `--config`. {{< /note >}} If a predefined certificate key is not passed to `kubeadm init` and `kubeadm init phase upload-certs` a new key will be generated automatically. The following command can be used to generate a new key on demand: ```shell kubeadm certs certificate-key ``` ### Certificate management with kubeadm For detailed information on certificate management with kubeadm see [Certificate Management with kubeadm](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/). The document includes information about using external CA, custom certificates and certificate renewal. ### Managing the kubeadm drop-in file for the kubelet {#kubelet-drop-in} The `kubeadm` package ships with a configuration file for running the `kubelet` by `systemd`. Note that the kubeadm CLI never touches this drop-in file. This drop-in file is part of the kubeadm DEB/RPM package. For further information, see [Managing the kubeadm drop-in file for systemd](/docs/setup/production-environment/tools/kubeadm/kubelet-integration/#the-kubelet-drop-in-file-for-systemd). ### Use kubeadm with CRI runtimes By default, kubeadm attempts to detect your container runtime. For more details on this detection, see the [kubeadm CRI installation guide](/docs/setup/production-environment/tools/kubeadm/install-kubeadm/#installing-runtime). ### Setting the node name By default, kubeadm assigns a node name based on a machine's host address. You can override this setting with the `--node-name` flag. The flag passes the appropriate [`--hostname-override`](/docs/reference/command-line-tools-reference/kubelet/#options) value to the kubelet. Be aware that overriding the hostname can [interfere with cloud providers](https://github.com/kubernetes/website/pull/8873). ### Automating kubeadm Rather than copying the token you obtained from `kubeadm init` to each node, as in the [basic kubeadm tutorial](/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/), you can parallelize the token distribution for easier automation. To implement this automation, you must know the IP address that the control plane node will have after it is started, or use a DNS name or an address of a load balancer. 1. Generate a token. This token must have the form `<6 character string>.<16 character string>`. More formally, it must match the regex: `[a-z0-9]{6}\.[a-z0-9]{16}`. kubeadm can generate a token for you: ```shell kubeadm token generate ``` 1. Start both the control plane node and the worker nodes concurrently with this token. As they come up they should find each other and form the cluster. The same `--token` argument can be used on both `kubeadm init` and `kubeadm join`. 1. Similar can be done for `--certificate-key` when joining additional control plane nodes. The key can be generated using: ```shell kubeadm certs certificate-key ``` Once the cluster is up, you can use the `/etc/kubernetes/admin.conf` file from a control plane node to talk to the cluster with administrator credentials or [Generating kubeconfig files for additional users](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs#kubeconfig-additional-users). Note that this style of bootstrap has some relaxed security guarantees because it does not allow the root CA hash to be validated with `--discovery-token-ca-cert-hash` (since it's not generated when the nodes are provisioned). For details, see the [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/). ## {{% heading "whatsnext" %}} \* [kubeadm init phase](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/) to understand more about `kubeadm init` phases \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to bootstrap a Kubernetes worker node and join it to the cluster \* [kubeadm upgrade](/docs/reference/setup-tools/kubeadm/kubeadm-upgrade/) to upgrade a Kubernetes cluster to a newer version \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join`
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-init.md
main
kubernetes
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0.039502
Kubernetes cluster to a newer version \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join`
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-init.md
main
kubernetes
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0.084338
{{< feature-state for\_k8s\_version="v1.10" state="stable" >}} `kubeadm init` and `kubeadm join` together provide a nice user experience for creating a bare Kubernetes cluster from scratch, that aligns with the best-practices. However, it might not be obvious \_how\_ kubeadm does that. This document provides additional details on what happens under the hood, with the aim of sharing knowledge on the best practices for a Kubernetes cluster. ## Core design principles The cluster that `kubeadm init` and `kubeadm join` set up should be: - \*\*Secure\*\*: It should adopt latest best-practices like: - enforcing RBAC - using the Node Authorizer - using secure communication between the control plane components - using secure communication between the API server and the kubelets - lock-down the kubelet API - locking down access to the API for system components like the kube-proxy and CoreDNS - locking down what a Bootstrap Token can access - \*\*User-friendly\*\*: The user should not have to run anything more than a couple of commands: - `kubeadm init` - `export KUBECONFIG=/etc/kubernetes/admin.conf` - `kubectl apply -f ` - `kubeadm join --token :` - \*\*Extendable\*\*: - It should \_not\_ favor any particular network provider. Configuring the cluster network is out-of-scope - It should provide the possibility to use a config file for customizing various parameters ## Constants and well-known values and paths In order to reduce complexity and to simplify development of higher level tools that build on top of kubeadm, it uses a limited set of constant values for well-known paths and file names. The Kubernetes directory `/etc/kubernetes` is a constant in the application, since it is clearly the given path in a majority of cases, and the most intuitive location; other constant paths and file names are: - `/etc/kubernetes/manifests` as the path where the kubelet should look for static Pod manifests. Names of static Pod manifests are: - `etcd.yaml` - `kube-apiserver.yaml` - `kube-controller-manager.yaml` - `kube-scheduler.yaml` - `/etc/kubernetes/` as the path where kubeconfig files with identities for control plane components are stored. Names of kubeconfig files are: - `kubelet.conf` (`bootstrap-kubelet.conf` during TLS bootstrap) - `controller-manager.conf` - `scheduler.conf` - `admin.conf` for the cluster admin and kubeadm itself - `super-admin.conf` for the cluster super-admin that can bypass RBAC - Names of certificates and key files: - `ca.crt`, `ca.key` for the Kubernetes certificate authority - `apiserver.crt`, `apiserver.key` for the API server certificate - `apiserver-kubelet-client.crt`, `apiserver-kubelet-client.key` for the client certificate used by the API server to connect to the kubelets securely - `sa.pub`, `sa.key` for the key used by the controller manager when signing ServiceAccount - `front-proxy-ca.crt`, `front-proxy-ca.key` for the front proxy certificate authority - `front-proxy-client.crt`, `front-proxy-client.key` for the front proxy client ## The kubeadm configuration file format Most kubeadm commands support a `--config` flag which allows passing a configuration file from disk. The configuration file format follows the common Kubernetes API `apiVersion` / `kind` scheme, but is considered a component configuration format. Several Kubernetes components, such as the kubelet, also support file-based configuration. Different kubeadm subcommands require a different `kind` of configuration file. For example, `InitConfiguration` for `kubeadm init`, `JoinConfiguration` for `kubeadm join`, `UpgradeConfiguration` for `kubeadm upgrade` and `ResetConfiguration` for `kubeadm reset`. The command `kubeadm config migrate` can be used to migrate an older format configuration file to a newer (current) configuration format. The kubeadm tool only supports migrating from deprecated configuration formats to the current format. See the [kubeadm configuration reference](/docs/reference/config-api/kubeadm-config.v1beta4/) page for more details. ## kubeadm init workflow internal design The `kubeadm init` consists of a sequence of atomic work tasks to perform, as described in the `kubeadm init` [internal workflow](/docs/reference/setup-tools/kubeadm/kubeadm-init/#init-workflow). The [`kubeadm init phase`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/) command allows users to invoke each task individually, and ultimately offers
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.199564
the [kubeadm configuration reference](/docs/reference/config-api/kubeadm-config.v1beta4/) page for more details. ## kubeadm init workflow internal design The `kubeadm init` consists of a sequence of atomic work tasks to perform, as described in the `kubeadm init` [internal workflow](/docs/reference/setup-tools/kubeadm/kubeadm-init/#init-workflow). The [`kubeadm init phase`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/) command allows users to invoke each task individually, and ultimately offers a reusable and composable API/toolbox that can be used by other Kubernetes bootstrap tools, by any IT automation tool or by an advanced user for creating custom clusters. ### Preflight checks Kubeadm executes a set of preflight checks before starting the init, with the aim to verify preconditions and avoid common cluster startup problems. The user can skip specific preflight checks or all of them with the `--ignore-preflight-errors` option. - [Warning] if the Kubernetes version to use (specified with the `--kubernetes-version` flag) is at least one minor version higher than the kubeadm CLI version. - Kubernetes system requirements: - if running on linux: - [Error] if Kernel is older than the minimum required version - [Error] if required cgroups subsystem aren't set up - [Error] if the CRI endpoint does not answer - [Error] if user is not root - [Error] if the machine hostname is not a valid DNS subdomain - [Warning] if the host name cannot be reached via network lookup - [Error] if kubelet version is lower that the minimum kubelet version supported by kubeadm (current minor -1) - [Error] if kubelet version is at least one minor higher than the required controlplane version (unsupported version skew) - [Warning] if kubelet service does not exist or if it is disabled - [Warning] if firewalld is active - [Error] if API server bindPort or ports 10250/10251/10252 are used - [Error] if `/etc/kubernetes/manifest` folder already exists and it is not empty - [Error] if swap is on - [Error] if `ip`, `iptables`, `mount`, `nsenter` commands are not present in the command path - [Warning] if `ethtool`, `tc`, `touch` commands are not present in the command path - [Warning] if extra arg flags for API server, controller manager, scheduler contains some invalid options - [Warning] if connection to https://API.AdvertiseAddress:API.BindPort goes through proxy - [Warning] if connection to services subnet goes through proxy (only first address checked) - [Warning] if connection to Pods subnet goes through proxy (only first address checked) - If external etcd is provided: - [Error] if etcd version is older than the minimum required version - [Error] if etcd certificates or keys are specified, but not provided - If external etcd is NOT provided (and thus local etcd will be installed): - [Error] if ports 2379 is used - [Error] if Etcd.DataDir folder already exists and it is not empty - If authorization mode is ABAC: - [Error] if abac\_policy.json does not exist - If authorization mode is WebHook - [Error] if webhook\_authz.conf does not exist {{< note >}} Preflight checks can be invoked individually with the [`kubeadm init phase preflight`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-preflight) command. {{< /note >}} ### Generate the necessary certificates Kubeadm generates certificate and private key pairs for different purposes: - A self signed certificate authority for the Kubernetes cluster saved into `ca.crt` file and `ca.key` private key file - A serving certificate for the API server, generated using `ca.crt` as the CA, and saved into `apiserver.crt` file with its private key `apiserver.key`. This certificate should contain the following alternative names: - The Kubernetes service's internal clusterIP (the first address in the services CIDR, e.g. `10.96.0.1` if service subnet is `10.96.0.0/12`) - Kubernetes DNS names, e.g. `kubernetes.default.svc.cluster.local` if `--service-dns-domain` flag value is `cluster.local`, plus default DNS names `kubernetes.default.svc`, `kubernetes.default`, `kubernetes` - The node-name - The `--apiserver-advertise-address` -
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.219209
the following alternative names: - The Kubernetes service's internal clusterIP (the first address in the services CIDR, e.g. `10.96.0.1` if service subnet is `10.96.0.0/12`) - Kubernetes DNS names, e.g. `kubernetes.default.svc.cluster.local` if `--service-dns-domain` flag value is `cluster.local`, plus default DNS names `kubernetes.default.svc`, `kubernetes.default`, `kubernetes` - The node-name - The `--apiserver-advertise-address` - Additional alternative names specified by the user - A client certificate for the API server to connect to the kubelets securely, generated using `ca.crt` as the CA and saved into `apiserver-kubelet-client.crt` file with its private key `apiserver-kubelet-client.key`. This certificate should be in the `system:masters` organization - A private key for signing ServiceAccount Tokens saved into `sa.key` file along with its public key `sa.pub` - A certificate authority for the front proxy saved into `front-proxy-ca.crt` file with its key `front-proxy-ca.key` - A client certificate for the front proxy client, generated using `front-proxy-ca.crt` as the CA and saved into `front-proxy-client.crt` file with its private key`front-proxy-client.key` Certificates are stored by default in `/etc/kubernetes/pki`, but this directory is configurable using the `--cert-dir` flag. Please note that: 1. If a given certificate and private key pair both exist, and their content is evaluated to be compliant with the above specs, the existing files will be used and the generation phase for the given certificate will be skipped. This means the user can, for example, copy an existing CA to `/etc/kubernetes/pki/ca.{crt,key}`, and then kubeadm will use those files for signing the rest of the certs. See also [using custom certificates](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs#custom-certificates) 1. For the CA, it is possible to provide the `ca.crt` file but not the `ca.key` file. If all other certificates and kubeconfig files are already in place, kubeadm recognizes this condition and activates the ExternalCA, which also implies the `csrsigner` controller in controller-manager won't be started 1. If kubeadm is running in [external CA mode](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs#external-ca-mode); all the certificates must be provided by the user, because kubeadm cannot generate them by itself 1. In case kubeadm is executed in the `--dry-run` mode, certificate files are written in a temporary folder 1. Certificate generation can be invoked individually with the [`kubeadm init phase certs all`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-certs) command ### Generate kubeconfig files for control plane components Kubeadm generates kubeconfig files with identities for control plane components: - A kubeconfig file for the kubelet to use during TLS bootstrap - `/etc/kubernetes/bootstrap-kubelet.conf`. Inside this file, there is a bootstrap-token or embedded client certificates for authenticating this node with the cluster. This client certificate should: - Be in the `system:nodes` organization, as required by the [Node Authorization](/docs/reference/access-authn-authz/node/) module - Have the Common Name (CN) `system:node:` - A kubeconfig file for controller-manager, `/etc/kubernetes/controller-manager.conf`; inside this file is embedded a client certificate with controller-manager identity. This client certificate should have the CN `system:kube-controller-manager`, as defined by default [RBAC core components roles](/docs/reference/access-authn-authz/rbac/#core-component-roles) - A kubeconfig file for scheduler, `/etc/kubernetes/scheduler.conf`; inside this file is embedded a client certificate with scheduler identity. This client certificate should have the CN `system:kube-scheduler`, as defined by default [RBAC core components roles](/docs/reference/access-authn-authz/rbac/#core-component-roles) Additionally, a kubeconfig file for kubeadm as an administrative entity is generated and stored in `/etc/kubernetes/admin.conf`. This file includes a certificate with `Subject: O = kubeadm:cluster-admins, CN = kubernetes-admin`. `kubeadm:cluster-admins` is a group managed by kubeadm. It is bound to the `cluster-admin` ClusterRole during `kubeadm init`, by using the `super-admin.conf` file, which does not require RBAC. This `admin.conf` file must remain on control plane nodes and should not be shared with additional users. During `kubeadm init` another kubeconfig file is generated and stored in `/etc/kubernetes/super-admin.conf`. This file includes a certificate with `Subject: O = system:masters, CN = kubernetes-super-admin`. `system:masters` is a superuser group that bypasses RBAC and makes `super-admin.conf`
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.151189
must remain on control plane nodes and should not be shared with additional users. During `kubeadm init` another kubeconfig file is generated and stored in `/etc/kubernetes/super-admin.conf`. This file includes a certificate with `Subject: O = system:masters, CN = kubernetes-super-admin`. `system:masters` is a superuser group that bypasses RBAC and makes `super-admin.conf` useful in case of an emergency where a cluster is locked due to RBAC misconfiguration. The `super-admin.conf` file must be stored in a safe location and should not be shared with additional users. See [RBAC user facing role bindings](/docs/reference/access-authn-authz/rbac/#user-facing-roles) for additional information on RBAC and built-in ClusterRoles and groups. You can run [`kubeadm kubeconfig user`](/docs/reference/setup-tools/kubeadm/kubeadm-kubeconfig/#cmd-kubeconfig-user) to generate kubeconfig files for additional users. {{< caution >}} The generated configuration files include an embedded authentication key, and you should treat them as confidential. {{< /caution >}} Also note that: 1. `ca.crt` certificate is embedded in all the kubeconfig files. 1. If a given kubeconfig file exists, and its content is evaluated as compliant with the above specs, the existing file will be used and the generation phase for the given kubeconfig will be skipped 1. If kubeadm is running in [ExternalCA mode](/docs/reference/setup-tools/kubeadm/kubeadm-init/#external-ca-mode), all the required kubeconfig must be provided by the user as well, because kubeadm cannot generate any of them by itself 1. In case kubeadm is executed in the `--dry-run` mode, kubeconfig files are written in a temporary folder 1. Generation of kubeconfig files can be invoked individually with the [`kubeadm init phase kubeconfig all`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-kubeconfig) command ### Generate static Pod manifests for control plane components Kubeadm writes static Pod manifest files for control plane components to `/etc/kubernetes/manifests`. The kubelet watches this directory for Pods to be created on startup. Static Pod manifests share a set of common properties: - All static Pods are deployed on `kube-system` namespace - All static Pods get `tier:control-plane` and `component:{component-name}` labels - All static Pods use the `system-node-critical` priority class - `hostNetwork: true` is set on all static Pods to allow control plane startup before a network is configured; as a consequence: \* The `address` that the controller-manager and the scheduler use to refer to the API server is `127.0.0.1` \* If the etcd server is set up locally, the `etcd-server` address will be set to `127.0.0.1:2379` - Leader election is enabled for both the controller-manager and the scheduler - Controller-manager and the scheduler will reference kubeconfig files with their respective, unique identities - All static Pods get any extra flags or patches that you specify, as described in [passing custom arguments to control plane components](/docs/setup/production-environment/tools/kubeadm/control-plane-flags/) - All static Pods get any extra Volumes specified by the user (Host path) Please note that: 1. All images will be pulled from registry.k8s.io by default. See [using custom images](/docs/reference/setup-tools/kubeadm/kubeadm-init/#custom-images) for customizing the image repository 1. In case kubeadm is executed in the `--dry-run` mode, static Pod files are written in a temporary folder 1. Static Pod manifest generation for control plane components can be invoked individually with the [`kubeadm init phase control-plane all`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-control-plane) command #### API server The static Pod manifest for the API server is affected by the following parameters provided by the users: - The `apiserver-advertise-address` and `apiserver-bind-port` to bind to; if not provided, those values default to the IP address of the default network interface on the machine and port 6443 - The `service-cluster-ip-range` to use for services - If an external etcd server is specified, the `etcd-servers` address and related TLS settings (`etcd-cafile`, `etcd-certfile`, `etcd-keyfile`); if an external etcd server is not provided, a local etcd will be used (via host network) - If a cloud provider is specified, the corresponding `--cloud-provider` parameter
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.094201
to use for services - If an external etcd server is specified, the `etcd-servers` address and related TLS settings (`etcd-cafile`, `etcd-certfile`, `etcd-keyfile`); if an external etcd server is not provided, a local etcd will be used (via host network) - If a cloud provider is specified, the corresponding `--cloud-provider` parameter is configured together with the `--cloud-config` path if such file exists (this is experimental, alpha and will be removed in a future version) Other API server flags that are set unconditionally are: - `--insecure-port=0` to avoid insecure connections to the api server - `--enable-bootstrap-token-auth=true` to enable the `BootstrapTokenAuthenticator` authentication module. See [TLS Bootstrapping](/docs/reference/access-authn-authz/kubelet-tls-bootstrapping/) for more details - `--allow-privileged` to `true` (required e.g. by kube proxy) - `--requestheader-client-ca-file` to `front-proxy-ca.crt` - `--enable-admission-plugins` to: - [`NamespaceLifecycle`](/docs/reference/access-authn-authz/admission-controllers/#namespacelifecycle) e.g. to avoid deletion of system reserved namespaces - [`LimitRanger`](/docs/reference/access-authn-authz/admission-controllers/#limitranger) and [`ResourceQuota`](/docs/reference/access-authn-authz/admission-controllers/#resourcequota) to enforce limits on namespaces - [`ServiceAccount`](/docs/reference/access-authn-authz/admission-controllers/#serviceaccount) to enforce service account automation - [`PersistentVolumeLabel`](/docs/reference/access-authn-authz/admission-controllers/#persistentvolumelabel) attaches region or zone labels to PersistentVolumes as defined by the cloud provider (This admission controller is deprecated and will be removed in a future version. It is not deployed by kubeadm by default with v1.9 onwards when not explicitly opting into using `gce` or `aws` as cloud providers) - [`DefaultStorageClass`](/docs/reference/access-authn-authz/admission-controllers/#defaultstorageclass) to enforce default storage class on `PersistentVolumeClaim` objects - [`DefaultTolerationSeconds`](/docs/reference/access-authn-authz/admission-controllers/#defaulttolerationseconds) - [`NodeRestriction`](/docs/reference/access-authn-authz/admission-controllers/#noderestriction) to limit what a kubelet can modify (e.g. only pods on this node) - `--kubelet-preferred-address-types` to `InternalIP,ExternalIP,Hostname;` this makes `kubectl logs` and other API server-kubelet communication work in environments where the hostnames of the nodes aren't resolvable - Flags for using certificates generated in previous steps: - `--client-ca-file` to `ca.crt` - `--tls-cert-file` to `apiserver.crt` - `--tls-private-key-file` to `apiserver.key` - `--kubelet-client-certificate` to `apiserver-kubelet-client.crt` - `--kubelet-client-key` to `apiserver-kubelet-client.key` - `--service-account-key-file` to `sa.pub` - `--requestheader-client-ca-file` to `front-proxy-ca.crt` - `--proxy-client-cert-file` to `front-proxy-client.crt` - `--proxy-client-key-file` to `front-proxy-client.key` - Other flags for securing the front proxy ([API Aggregation](/docs/concepts/extend-kubernetes/api-extension/apiserver-aggregation/)) communications: - `--requestheader-username-headers=X-Remote-User` - `--requestheader-group-headers=X-Remote-Group` - `--requestheader-extra-headers-prefix=X-Remote-Extra-` - `--requestheader-allowed-names=front-proxy-client` #### Controller manager The static Pod manifest for the controller manager is affected by following parameters provided by the users: - If kubeadm is invoked specifying a `--pod-network-cidr`, the subnet manager feature required for some CNI network plugins is enabled by setting: - `--allocate-node-cidrs=true` - `--cluster-cidr` and `--node-cidr-mask-size` flags according to the given CIDR Other flags that are set unconditionally are: - `--controllers` enabling all the default controllers plus `BootstrapSigner` and `TokenCleaner` controllers for TLS bootstrap. See [TLS Bootstrapping](/docs/reference/access-authn-authz/kubelet-tls-bootstrapping/) for more details. - `--use-service-account-credentials` to `true` - Flags for using certificates generated in previous steps: - `--root-ca-file` to `ca.crt` - `--cluster-signing-cert-file` to `ca.crt`, if External CA mode is disabled, otherwise to `""` - `--cluster-signing-key-file` to `ca.key`, if External CA mode is disabled, otherwise to `""` - `--service-account-private-key-file` to `sa.key` #### Scheduler The static Pod manifest for the scheduler is not affected by parameters provided by the user. ### Generate static Pod manifest for local etcd If you specified an external etcd, this step will be skipped, otherwise kubeadm generates a static Pod manifest file for creating a local etcd instance running in a Pod with following attributes: - listen on `localhost:2379` and use `HostNetwork=true` - make a `hostPath` mount out from the `dataDir` to the host's filesystem - Any extra flags specified by the user Please note that: 1. The etcd container image will be pulled from `registry.gcr.io` by default. See [using custom images](/docs/reference/setup-tools/kubeadm/kubeadm-init/#custom-images) for customizing the image repository. 1. If you run kubeadm in `--dry-run` mode, the etcd static Pod manifest is written into a temporary folder. 1. You can directly invoke static Pod manifest generation for local etcd, using the [`kubeadm init phase etcd local`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-etcd) command. ### Wait for the control plane to come
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.018075
the image repository. 1. If you run kubeadm in `--dry-run` mode, the etcd static Pod manifest is written into a temporary folder. 1. You can directly invoke static Pod manifest generation for local etcd, using the [`kubeadm init phase etcd local`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-etcd) command. ### Wait for the control plane to come up On control plane nodes, kubeadm waits up to 4 minutes for the control plane components and the kubelet to be available. It does that by performing a health check on the respective component `/healthz` or `/livez` endpoints. After the control plane is up, kubeadm completes the tasks described in following paragraphs. ### Save the kubeadm ClusterConfiguration in a ConfigMap for later reference kubeadm saves the configuration passed to `kubeadm init` in a ConfigMap named `kubeadm-config` under `kube-system` namespace. This will ensure that kubeadm actions executed in future (e.g `kubeadm upgrade`) will be able to determine the actual/current cluster state and make new decisions based on that data. Please note that: 1. Before saving the ClusterConfiguration, sensitive information like the token is stripped from the configuration 1. Upload of control plane node configuration can be invoked individually with the command [`kubeadm init phase upload-config`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-upload-config). ### Mark the node as control-plane As soon as the control plane is available, kubeadm executes the following actions: - Labels the node as control-plane with `node-role.kubernetes.io/control-plane=""` - Taints the node with `node-role.kubernetes.io/control-plane:NoSchedule` Please note that the phase to mark the control-plane phase can be invoked individually with the [`kubeadm init phase mark-control-plane`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-mark-control-plane) command. ### Configure TLS-Bootstrapping for node joining Kubeadm uses [Authenticating with Bootstrap Tokens](/docs/reference/access-authn-authz/bootstrap-tokens/) for joining new nodes to an existing cluster; for more details see also [design proposal](https://git.k8s.io/design-proposals-archive/cluster-lifecycle/bootstrap-discovery.md). `kubeadm init` ensures that everything is properly configured for this process, and this includes following steps as well as setting API server and controller flags as already described in previous paragraphs. {{< note >}} TLS bootstrapping for nodes can be configured with the command [`kubeadm init phase bootstrap-token`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-bootstrap-token), executing all the configuration steps described in following paragraphs; alternatively, each step can be invoked individually. {{< /note >}} #### Create a bootstrap token `kubeadm init` creates a first bootstrap token, either generated automatically or provided by the user with the `--token` flag; as documented in bootstrap token specification, token should be saved as a secret with name `bootstrap-token-` under `kube-system` namespace. Please note that: 1. The default token created by `kubeadm init` will be used to validate temporary user during TLS bootstrap process; those users will be member of `system:bootstrappers:kubeadm:default-node-token` group 1. The token has a limited validity, default 24 hours (the interval may be changed with the `—token-ttl` flag) 1. Additional tokens can be created with the [`kubeadm token`](/docs/reference/setup-tools/kubeadm/kubeadm-token/) command, that provide other useful functions for token management as well. #### Allow joining nodes to call CSR API Kubeadm ensures that users in `system:bootstrappers:kubeadm:default-node-token` group are able to access the certificate signing API. This is implemented by creating a ClusterRoleBinding named `kubeadm:kubelet-bootstrap` between the group above and the default RBAC role `system:node-bootstrapper`. #### Set up auto approval for new bootstrap tokens Kubeadm ensures that the Bootstrap Token will get its CSR request automatically approved by the csrapprover controller. This is implemented by creating ClusterRoleBinding named `kubeadm:node-autoapprove-bootstrap` between the `system:bootstrappers:kubeadm:default-node-token` group and the default role `system:certificates.k8s.io:certificatesigningrequests:nodeclient`. The role `system:certificates.k8s.io:certificatesigningrequests:nodeclient` should be created as well, granting POST permission to `/apis/certificates.k8s.io/certificatesigningrequests/nodeclient`. #### Set up nodes certificate rotation with auto approval Kubeadm ensures that certificate rotation is enabled for nodes, and that a new certificate request for nodes will get its CSR request automatically approved by the csrapprover controller. This is implemented by creating ClusterRoleBinding named `kubeadm:node-autoapprove-certificate-rotation` between the
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.095877
permission to `/apis/certificates.k8s.io/certificatesigningrequests/nodeclient`. #### Set up nodes certificate rotation with auto approval Kubeadm ensures that certificate rotation is enabled for nodes, and that a new certificate request for nodes will get its CSR request automatically approved by the csrapprover controller. This is implemented by creating ClusterRoleBinding named `kubeadm:node-autoapprove-certificate-rotation` between the `system:nodes` group and the default role `system:certificates.k8s.io:certificatesigningrequests:selfnodeclient`. #### Create the public cluster-info ConfigMap This phase creates the `cluster-info` ConfigMap in the `kube-public` namespace. Additionally, it creates a Role and a RoleBinding granting access to the ConfigMap for unauthenticated users (i.e. users in RBAC group `system:unauthenticated`). {{< note >}} The access to the `cluster-info` ConfigMap \_is not\_ rate-limited. This may or may not be a problem if you expose your cluster's API server to the internet; worst-case scenario here is a DoS attack where an attacker uses all the in-flight requests the kube-apiserver can handle to serve the `cluster-info` ConfigMap. {{< /note >}} ### Install addons Kubeadm installs the internal DNS server and the kube-proxy addon components via the API server. {{< note >}} This phase can be invoked individually with the command [`kubeadm init phase addon all`](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-addon). {{< /note >}} #### proxy A ServiceAccount for `kube-proxy` is created in the `kube-system` namespace; then kube-proxy is deployed as a DaemonSet: - The credentials (`ca.crt` and `token`) to the control plane come from the ServiceAccount - The location (URL) of the API server comes from a ConfigMap - The `kube-proxy` ServiceAccount is bound to the privileges in the `system:node-proxier` ClusterRole #### DNS - The CoreDNS service is named `kube-dns` for compatibility reasons with the legacy `kube-dns` addon. - A ServiceAccount for CoreDNS is created in the `kube-system` namespace. - The `coredns` ServiceAccount is bound to the privileges in the `system:coredns` ClusterRole In Kubernetes version 1.21, support for using `kube-dns` with kubeadm was removed. You can use CoreDNS with kubeadm even when the related Service is named `kube-dns`. ## kubeadm join phases internal design Similarly to `kubeadm init`, also `kubeadm join` internal workflow consists of a sequence of atomic work tasks to perform. This is split into discovery (having the Node trust the Kubernetes API Server) and TLS bootstrap (having the Kubernetes API Server trust the Node). see [Authenticating with Bootstrap Tokens](/docs/reference/access-authn-authz/bootstrap-tokens/) or the corresponding [design proposal](https://git.k8s.io/design-proposals-archive/cluster-lifecycle/bootstrap-discovery.md). ### Preflight checks `kubeadm` executes a set of preflight checks before starting the join, with the aim to verify preconditions and avoid common cluster startup problems. Also note that: 1. `kubeadm join` preflight checks are basically a subset of `kubeadm init` preflight checks 1. If you are joining a Windows node, Linux specific controls are skipped. 1. In any case the user can skip specific preflight checks (or eventually all preflight checks) with the `--ignore-preflight-errors` option. ### Discovery cluster-info There are 2 main schemes for discovery. The first is to use a shared token along with the IP address of the API server. The second is to provide a file (that is a subset of the standard kubeconfig file). #### Shared token discovery If `kubeadm join` is invoked with `--discovery-token`, token discovery is used; in this case the node basically retrieves the cluster CA certificates from the `cluster-info` ConfigMap in the `kube-public` namespace. In order to prevent "man in the middle" attacks, several steps are taken: - First, the CA certificate is retrieved via insecure connection (this is possible because `kubeadm init` is granted access to `cluster-info` users for `system:unauthenticated`) - Then the CA certificate goes through following validation steps: - Basic validation: using the token ID against a JWT signature - Pub key validation: using provided `--discovery-token-ca-cert-hash`. This value is available in the output of
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.11735
(this is possible because `kubeadm init` is granted access to `cluster-info` users for `system:unauthenticated`) - Then the CA certificate goes through following validation steps: - Basic validation: using the token ID against a JWT signature - Pub key validation: using provided `--discovery-token-ca-cert-hash`. This value is available in the output of `kubeadm init` or can be calculated using standard tools (the hash is calculated over the bytes of the Subject Public Key Info (SPKI) object as in RFC7469). The `--discovery-token-ca-cert-hash flag` may be repeated multiple times to allow more than one public key. - As an additional validation, the CA certificate is retrieved via secure connection and then compared with the CA retrieved initially {{< note >}} You can skip CA validation by passing the `--discovery-token-unsafe-skip-ca-verification` flag on the command line. This weakens the kubeadm security model since others can potentially impersonate the Kubernetes API server. {{< /note >}} #### File/https discovery If `kubeadm join` is invoked with `--discovery-file`, file discovery is used; this file can be a local file or downloaded via an HTTPS URL; in case of HTTPS, the host installed CA bundle is used to verify the connection. With file discovery, the cluster CA certificate is provided into the file itself; in fact, the discovery file is a kubeconfig file with only `server` and `certificate-authority-data` attributes set, as described in the [`kubeadm join`](/docs/reference/setup-tools/kubeadm/kubeadm-join/#file-or-https-based-discovery) reference doc; when the connection with the cluster is established, kubeadm tries to access the `cluster-info` ConfigMap, and if available, uses it. ## TLS Bootstrap Once the cluster info is known, the file `bootstrap-kubelet.conf` is written, thus allowing kubelet to do TLS Bootstrapping. The TLS bootstrap mechanism uses the shared token to temporarily authenticate with the Kubernetes API server to submit a certificate signing request (CSR) for a locally created key pair. The request is then automatically approved and the operation completes saving `ca.crt` file and `kubelet.conf` file to be used by the kubelet for joining the cluster, while `bootstrap-kubelet.conf` is deleted. {{< note >}} - The temporary authentication is validated against the token saved during the `kubeadm init` process (or with additional tokens created with `kubeadm token` command) - The temporary authentication resolves to a user member of `system:bootstrappers:kubeadm:default-node-token` group which was granted access to the CSR api during the `kubeadm init` process - The automatic CSR approval is managed by the csrapprover controller, according to the configuration present in the `kubeadm init` process {{< /note >}} ## kubeadm upgrade workflow internal design `kubeadm upgrade` has sub-commands for handling the upgrade of the Kubernetes cluster created by kubeadm. You must run `kubeadm upgrade apply` on a control plane node (you can choose which one); this starts the upgrade process. You then run `kubeadm upgrade node` on all remaining nodes (both worker nodes and control plane nodes). Both `kubeadm upgrade apply` and `kubeadm upgrade node` have a `phase` subcommand which provides access to the internal phases of the upgrade process. See [`kubeadm upgrade phase`](/docs/reference/setup-tools/kubeadm/kubeadm-upgrade-phase/) for more details. Additional utility upgrade commands are `kubeadm upgrade plan` and `kubeadm upgrade diff`. All upgrade sub-commands support passing a configuration file. ### kubeadm upgrade plan You can optionally run `kubeadm upgrade plan` before you run `kubeadm upgrade apply`. The `plan` subcommand checks which versions are available to upgrade to and validates whether your current cluster is upgradeable. ### kubeadm upgrade diff This shows what differences would be applied to existing static pod manifests for control plane nodes. A more verbose way to do the same thing is running `kubeadm upgrade apply --dry-run` or `kubeadm upgrade node --dry-run`. ### kubeadm upgrade apply `kubeadm upgrade apply` prepares the cluster for the
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.051377
upgrade diff This shows what differences would be applied to existing static pod manifests for control plane nodes. A more verbose way to do the same thing is running `kubeadm upgrade apply --dry-run` or `kubeadm upgrade node --dry-run`. ### kubeadm upgrade apply `kubeadm upgrade apply` prepares the cluster for the upgrade of all nodes, and also upgrades the control plane node where it's run. The steps it performs are: - Runs preflight checks similarly to `kubeadm init` and `kubeadm join`, ensuring container images are downloaded and the cluster is in a good state to be upgraded. - Upgrades the control plane manifest files on disk in `/etc/kubernetes/manifests` and waits for the kubelet to restart the components if the files have changed. - Uploads the updated kubeadm and kubelet configurations to the cluster in the `kubeadm-config` and the `kubelet-config` ConfigMaps (both in the `kube-system` namespace). - Writes updated kubelet configuration for this node in `/var/lib/kubelet/config.yaml`, and read the node's `/var/lib/kubelet/instance-config.yaml` file and patch fields like `containerRuntimeEndpoint` from this instance configuration into `/var/lib/kubelet/config.yaml`. - Configures bootstrap token and the `cluster-info` ConfigMap for RBAC rules. This is the same as in the `kubeadm init` stage and ensures that the cluster continues to support nodes joining with bootstrap tokens. - Upgrades the kube-proxy and CoreDNS addons conditionally if all existing kube-apiservers in the cluster have already been upgraded to the target version. - Performs any post-upgrade tasks, such as, cleaning up deprecated features which are release specific. ### kubeadm upgrade node `kubeadm upgrade node` upgrades a single control plane or worker node after the cluster upgrade has started (by running `kubeadm upgrade apply`). The command detects if the node is a control plane node by checking if the file `/etc/kubernetes/manifests/kube-apiserver.yaml` exists. On finding that file, the kubeadm tool infers that there is a running kube-apiserver Pod on this node. - Runs preflight checks similarly to `kubeadm upgrade apply`. - For control plane nodes, upgrades the control plane manifest files on disk in `/etc/kubernetes/manifests` and waits for the kubelet to restart the components if the files have changed. - Writes updated kubelet configuration for this node in `/var/lib/kubelet/config.yaml`, and read the node's `/var/lib/kubelet/instance-config.yaml` file and patch fields like `containerRuntimeEndpoint` from this instance configuration into `/var/lib/kubelet/config.yaml`. - (For control plane nodes) upgrades the kube-proxy and CoreDNS {{< glossary\_tooltip text="addons" term\_id="addons" >}} conditionally, provided that all existing API servers in the cluster have already been upgraded to the target version. - Performs any post-upgrade tasks, such as cleaning up deprecated features which are release specific. ## kubeadm reset workflow internal design You can use the `kubeadm reset` subcommand on a node where kubeadm commands previously executed. This subcommand performs a \*\*best-effort\*\* cleanup of the node. If certain actions fail you must intervene and perform manual cleanup. The command supports phases. See [`kubeadm reset phase`](/docs/reference/setup-tools/kubeadm/kubeadm-reset-phase/) for more details. The command supports a configuration file. Additionally: - IPVS, iptables and nftables rules are \*\*not\*\* cleaned up. - CNI (network plugin) configuration is \*\*not\*\* cleaned up. - `.kube/` in the user's home directory is \*\*not\*\* cleaned up. The command has the following stages: - Runs preflight checks on the node to determine if its healthy. - For control plane nodes, removes any local etcd member data. - Stops the kubelet. - Stops running containers. - Unmounts any mounted directories in `/var/lib/kubelet`. - Deletes any files and directories managed by kubeadm in `/var/lib/kubelet` and `/etc/kubernetes`.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.110543
`/var/lib/kubelet`. - Deletes any files and directories managed by kubeadm in `/var/lib/kubelet` and `/etc/kubernetes`.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/implementation-details.md
main
kubernetes
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0.11961
`kubeadm upgrade` is a user-friendly command that wraps complex upgrading logic behind one command, with support for both planning an upgrade and actually performing it. ## kubeadm upgrade guidance The steps for performing an upgrade using kubeadm are outlined in [this document](/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade/). For older versions of kubeadm, please refer to older documentation sets of the Kubernetes website. You can use `kubeadm upgrade diff` to see the changes that would be applied to static pod manifests. In Kubernetes v1.15.0 and later, `kubeadm upgrade apply` and `kubeadm upgrade node` will also automatically renew the kubeadm managed certificates on this node, including those stored in kubeconfig files. To opt-out, it is possible to pass the flag `--certificate-renewal=false`. For more details about certificate renewal see the [certificate management documentation](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs). {{< note >}} The commands `kubeadm upgrade apply` and `kubeadm upgrade plan` have a legacy `--config` flag which makes it possible to reconfigure the cluster, while performing planning or upgrade of that particular control-plane node. Please be aware that the upgrade workflow was not designed for this scenario and there are reports of unexpected results. {{}} ## kubeadm upgrade plan {#cmd-upgrade-plan} {{< include "generated/kubeadm\_upgrade/kubeadm\_upgrade\_plan.md" >}} ## kubeadm upgrade apply {#cmd-upgrade-apply} {{< include "generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply.md" >}} ## kubeadm upgrade diff {#cmd-upgrade-diff} {{< include "generated/kubeadm\_upgrade/kubeadm\_upgrade\_diff.md" >}} ## kubeadm upgrade node {#cmd-upgrade-node} {{< include "generated/kubeadm\_upgrade/kubeadm\_upgrade\_node.md" >}} ## {{% heading "whatsnext" %}} \* [kubeadm config](/docs/reference/setup-tools/kubeadm/kubeadm-config/) if you initialized your cluster using kubeadm v1.7.x or lower, to configure your cluster for `kubeadm upgrade`
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-upgrade.md
main
kubernetes
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0.093467
`kubeadm init phase` enables you to invoke atomic steps of the bootstrap process. Hence, you can let kubeadm do some of the work and you can fill in the gaps if you wish to apply customization. `kubeadm init phase` is consistent with the [kubeadm init workflow](/docs/reference/setup-tools/kubeadm/kubeadm-init/#init-workflow), and behind the scene both use the same code. ## kubeadm init phase preflight {#cmd-phase-preflight} Using this command you can execute preflight checks on a control-plane node. {{< tabs name="tab-preflight" >}} {{< tab name="preflight" include="generated/kubeadm\_init/kubeadm\_init\_phase\_preflight.md" />}} {{< /tabs >}} ## kubeadm init phase kubelet-start {#cmd-phase-kubelet-start} This phase will write the kubelet configuration file and environment file and then start the kubelet. {{< tabs name="tab-kubelet-start" >}} {{< tab name="kubelet-start" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubelet-start.md" />}} {{< /tabs >}} ## kubeadm init phase certs {#cmd-phase-certs} Can be used to create all required certificates by kubeadm. {{< tabs name="tab-certs" >}} {{< tab name="certs" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs.md" />}} {{< tab name="all" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_all.md" />}} {{< tab name="ca" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_ca.md" />}} {{< tab name="apiserver" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_apiserver.md" />}} {{< tab name="apiserver-kubelet-client" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_apiserver-kubelet-client.md" />}} {{< tab name="front-proxy-ca" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_front-proxy-ca.md" />}} {{< tab name="front-proxy-client" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_front-proxy-client.md" />}} {{< tab name="etcd-ca" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_etcd-ca.md" />}} {{< tab name="etcd-server" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_etcd-server.md" />}} {{< tab name="etcd-peer" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_etcd-peer.md" />}} {{< tab name="healthcheck-client" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_etcd-healthcheck-client.md" />}} {{< tab name="apiserver-etcd-client" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_apiserver-etcd-client.md" />}} {{< tab name="sa" include="generated/kubeadm\_init/kubeadm\_init\_phase\_certs\_sa.md" />}} {{< /tabs >}} ## kubeadm init phase kubeconfig {#cmd-phase-kubeconfig} You can create all required kubeconfig files by calling the `all` subcommand or call them individually. {{< tabs name="tab-kubeconfig" >}} {{< tab name="kubeconfig" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubeconfig.md" />}} {{< tab name="all" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubeconfig\_all.md" />}} {{< tab name="admin" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubeconfig\_admin.md" />}} {{< tab name="kubelet" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubeconfig\_kubelet.md" />}} {{< tab name="controller-manager" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubeconfig\_controller-manager.md" />}} {{< tab name="scheduler" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubeconfig\_scheduler.md" />}} {{< tab name="super-admin" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubeconfig\_super-admin.md" />}} {{< /tabs >}} ## kubeadm init phase control-plane {#cmd-phase-control-plane} Using this phase you can create all required static Pod files for the control plane components. {{< tabs name="tab-control-plane" >}} {{< tab name="control-plane" include="generated/kubeadm\_init/kubeadm\_init\_phase\_control-plane.md" />}} {{< tab name="all" include="generated/kubeadm\_init/kubeadm\_init\_phase\_control-plane\_all.md" />}} {{< tab name="apiserver" include="generated/kubeadm\_init/kubeadm\_init\_phase\_control-plane\_apiserver.md" />}} {{< tab name="controller-manager" include="generated/kubeadm\_init/kubeadm\_init\_phase\_control-plane\_controller-manager.md" />}} {{< tab name="scheduler" include="generated/kubeadm\_init/kubeadm\_init\_phase\_control-plane\_scheduler.md" />}} {{< /tabs >}} ## kubeadm init phase etcd {#cmd-phase-etcd} Use the following phase to create a local etcd instance based on a static Pod file. {{< tabs name="tab-etcd" >}} {{< tab name="etcd" include="generated/kubeadm\_init/kubeadm\_init\_phase\_etcd.md" />}} {{< tab name="local" include="generated/kubeadm\_init/kubeadm\_init\_phase\_etcd\_local.md" />}} {{< /tabs >}} ## kubeadm init phase upload-config {#cmd-phase-upload-config} You can use this command to upload the kubeadm configuration to your cluster. Alternatively, you can use [kubeadm config](/docs/reference/setup-tools/kubeadm/kubeadm-config/). {{< tabs name="upload-config" >}} {{< tab name="upload-config" include="generated/kubeadm\_init/kubeadm\_init\_phase\_upload-config.md" />}} {{< tab name="all" include="generated/kubeadm\_init/kubeadm\_init\_phase\_upload-config\_all.md" />}} {{< tab name="kubeadm" include="generated/kubeadm\_init/kubeadm\_init\_phase\_upload-config\_kubeadm.md" />}} {{< tab name="kubelet" include="generated/kubeadm\_init/kubeadm\_init\_phase\_upload-config\_kubelet.md" />}} {{< /tabs >}} ## kubeadm init phase upload-certs {#cmd-phase-upload-certs} Use the following phase to upload control-plane certificates to the cluster. By default the certs and encryption key expire after two hours. {{< tabs name="tab-upload-certs" >}} {{< tab name="upload-certs" include="generated/kubeadm\_init/kubeadm\_init\_phase\_upload-certs.md" />}} {{< /tabs >}} ## kubeadm init phase mark-control-plane {#cmd-phase-mark-control-plane} Use the following phase to label and taint the node as a control plane node. {{< tabs name="tab-mark-control-plane" >}} {{< tab name="mark-control-plane" include="generated/kubeadm\_init/kubeadm\_init\_phase\_mark-control-plane.md" />}} {{< /tabs >}} ## kubeadm init phase bootstrap-token {#cmd-phase-bootstrap-token} Use the following phase to configure bootstrap tokens. {{< tabs name="tab-bootstrap-token" >}} {{< tab name="bootstrap-token" include="generated/kubeadm\_init/kubeadm\_init\_phase\_bootstrap-token.md" />}} {{< /tabs >}} ## kubeadm init phase kubelet-finalize {#cmd-phase-kubelet-finalize-all} Use the following phase to update settings relevant to the kubelet after TLS bootstrap. You can use the `all` subcommand to run all `kubelet-finalize` phases. {{< tabs name="tab-kubelet-finalize" >}} {{< tab name="kubelet-finalize" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubelet-finalize.md" />}} {{< tab name="kubelet-finalize-all" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubelet-finalize\_all.md" />}} {{< tab name="kubelet-finalize-enable-client-cert-rotation" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubelet-finalize\_enable-client-cert-rotation.md" />}} {{< /tabs >}} ## kubeadm init phase addon {#cmd-phase-addon} You can install all the available addons with the `all` subcommand, or install them selectively. {{< tabs name="tab-addon" >}} {{< tab name="addon" include="generated/kubeadm\_init/kubeadm\_init\_phase\_addon.md" />}} {{< tab
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-init-phase.md
main
kubernetes
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0.080421
{{< tab name="kubelet-finalize" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubelet-finalize.md" />}} {{< tab name="kubelet-finalize-all" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubelet-finalize\_all.md" />}} {{< tab name="kubelet-finalize-enable-client-cert-rotation" include="generated/kubeadm\_init/kubeadm\_init\_phase\_kubelet-finalize\_enable-client-cert-rotation.md" />}} {{< /tabs >}} ## kubeadm init phase addon {#cmd-phase-addon} You can install all the available addons with the `all` subcommand, or install them selectively. {{< tabs name="tab-addon" >}} {{< tab name="addon" include="generated/kubeadm\_init/kubeadm\_init\_phase\_addon.md" />}} {{< tab name="all" include="generated/kubeadm\_init/kubeadm\_init\_phase\_addon\_all.md" />}} {{< tab name="coredns" include="generated/kubeadm\_init/kubeadm\_init\_phase\_addon\_coredns.md" />}} {{< tab name="kube-proxy" include="generated/kubeadm\_init/kubeadm\_init\_phase\_addon\_kube-proxy.md" />}} {{< /tabs >}} For more details on each field in the `v1beta4` configuration you can navigate to our [API reference pages.](/docs/reference/config-api/kubeadm-config.v1beta4/) ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join` \* [kubeadm alpha](/docs/reference/setup-tools/kubeadm/kubeadm-alpha/) to try experimental functionality
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-init-phase.md
main
kubernetes
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0.019795
`kubeadm join phase` enables you to invoke atomic steps of the join process. Hence, you can let kubeadm do some of the work and you can fill in the gaps if you wish to apply customization. `kubeadm join phase` is consistent with the [kubeadm join workflow](/docs/reference/setup-tools/kubeadm/kubeadm-join/#join-workflow), and behind the scene both use the same code. ## kubeadm join phase {#cmd-join-phase} {{< tabs name="tab-phase" >}} {{< tab name="phase" include="generated/kubeadm\_join/kubeadm\_join\_phase.md" />}} {{< /tabs >}} ## kubeadm join phase preflight {#cmd-join-phase-preflight} Using this phase you can execute preflight checks on a joining node. {{< tabs name="tab-preflight" >}} {{< tab name="preflight" include="generated/kubeadm\_join/kubeadm\_join\_phase\_preflight.md" />}} {{< /tabs >}} ## kubeadm join phase control-plane-prepare {#cmd-join-phase-control-plane-prepare} Using this phase you can prepare a node for serving a control-plane. {{< tabs name="tab-control-plane-prepare" >}} {{< tab name="control-plane-prepare" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-prepare.md" />}} {{< tab name="all" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-prepare\_all.md" />}} {{< tab name="download-certs" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-prepare\_download-certs.md" />}} {{< tab name="certs" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-prepare\_certs.md" />}} {{< tab name="kubeconfig" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-prepare\_kubeconfig.md" />}} {{< tab name="control-plane" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-prepare\_control-plane.md" />}} {{< /tabs >}} ## kubeadm join phase kubelet-start {#cmd-join-phase-kubelet-start} Using this phase you can write the kubelet settings, certificates and (re)start the kubelet. {{< tabs name="tab-kubelet-start" >}} {{< tab name="kubelet-start" include="generated/kubeadm\_join/kubeadm\_join\_phase\_kubelet-start.md" />}} {{< /tabs >}} ## kubeadm join phase control-plane-join {#cmd-join-phase-control-plane-join} Using this phase you can join a node as a control-plane instance. {{< tabs name="tab-control-plane-join" >}} {{< tab name="control-plane-join" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-join.md" />}} {{< tab name="all" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-join\_all.md" />}} {{< tab name="etcd" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-join\_etcd.md" />}} {{< tab name="mark-control-plane" include="generated/kubeadm\_join/kubeadm\_join\_phase\_control-plane-join\_mark-control-plane.md" />}} {{< /tabs >}} ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join` \* [kubeadm alpha](/docs/reference/setup-tools/kubeadm/kubeadm-alpha/) to try experimental functionality
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-join-phase.md
main
kubernetes
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0.075411
Bootstrap tokens are used for establishing bidirectional trust between a node joining the cluster and a control-plane node, as described in [authenticating with bootstrap tokens](/docs/reference/access-authn-authz/bootstrap-tokens/). `kubeadm init` creates an initial token with a 24-hour TTL. The following commands allow you to manage such a token and also to create and manage new ones. ## kubeadm token create {#cmd-token-create} {{< include "generated/kubeadm\_token/kubeadm\_token\_create.md" >}} ## kubeadm token delete {#cmd-token-delete} {{< include "generated/kubeadm\_token/kubeadm\_token\_delete.md" >}} ## kubeadm token generate {#cmd-token-generate} {{< include "generated/kubeadm\_token/kubeadm\_token\_generate.md" >}} ## kubeadm token list {#cmd-token-list} {{< include "generated/kubeadm\_token/kubeadm\_token\_list.md" >}} ## {{% heading "whatsnext" %}} \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to bootstrap a Kubernetes worker node and join it to the cluster
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-token.md
main
kubernetes
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0.176744
`kubeadm reset phase` enables you to invoke atomic steps of the node reset process. Hence, you can let kubeadm do some of the work and you can fill in the gaps if you wish to apply customization. `kubeadm reset phase` is consistent with the [kubeadm reset workflow](/docs/reference/setup-tools/kubeadm/kubeadm-reset/#reset-workflow), and behind the scene both use the same code. ## kubeadm reset phase {#cmd-reset-phase} {{< tabs name="tab-phase" >}} {{< tab name="phase" include="generated/kubeadm\_reset/kubeadm\_reset\_phase.md" />}} {{< /tabs >}} ## kubeadm reset phase preflight {#cmd-reset-phase-preflight} Using this phase you can execute preflight checks on a node that is being reset. {{< tabs name="tab-preflight" >}} {{< tab name="preflight" include="generated/kubeadm\_reset/kubeadm\_reset\_phase\_preflight.md" />}} {{< /tabs >}} ## kubeadm reset phase remove-etcd-member {#cmd-reset-phase-remove-etcd-member} Using this phase you can remove this control-plane node's etcd member from the etcd cluster. {{< tabs name="tab-remove-etcd-member" >}} {{< tab name="remove-etcd-member" include="generated/kubeadm\_reset/kubeadm\_reset\_phase\_remove-etcd-member.md" />}} {{< /tabs >}} ## kubeadm reset phase cleanup-node {#cmd-reset-phase-cleanup-node} Using this phase you can perform cleanup on this node. {{< tabs name="tab-cleanup-node" >}} {{< tab name="cleanup-node" include="generated/kubeadm\_reset/kubeadm\_reset\_phase\_cleanup-node.md" />}} {{< /tabs >}} ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join` \* [kubeadm alpha](/docs/reference/setup-tools/kubeadm/kubeadm-alpha/) to try experimental functionality
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-reset-phase.md
main
kubernetes
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0.105432
## kubeadm upgrade apply phase {#cmd-apply-phase} Using the phases of `kubeadm upgrade apply`, you can choose to execute the separate steps of the initial upgrade of a control plane node. {{< tabs name="tab-apply-phase" >}} {{< tab name="phase" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply\_phase.md" />}} {{< tab name="preflight" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply\_phase\_preflight.md" />}} {{< tab name="control-plane" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply\_phase\_control-plane.md" />}} {{< tab name="upload-config" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply\_phase\_upload-config.md" />}} {{< tab name="kubelet-config" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply\_phase\_kubelet-config.md" />}} {{< tab name="bootstrap-token" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply\_phase\_bootstrap-token.md" />}} {{< tab name="addon" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply\_phase\_addon.md" />}} {{< tab name="post-upgrade" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_apply\_phase\_post-upgrade.md" />}} {{< /tabs >}} ## kubeadm upgrade node phase {#cmd-node-phase} Using the phases of `kubeadm upgrade node` you can choose to execute the separate steps of the upgrade of secondary control-plane or worker nodes. {{< tabs name="tab-upgrade-phase" >}} {{< tab name="phase" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_node\_phase.md" />}} {{< tab name="preflight" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_node\_phase\_preflight.md" />}} {{< tab name="control-plane" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_node\_phase\_control-plane.md" />}} {{< tab name="kubelet-config" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_node\_phase\_kubelet-config.md" />}} {{< tab name="addon" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_node\_phase\_addon.md" />}} {{< tab name="post-upgrade" include="generated/kubeadm\_upgrade/kubeadm\_upgrade\_node\_phase\_post-upgrade.md" />}} {{< /tabs >}} ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join` \* [kubeadm upgrade](/docs/reference/setup-tools/kubeadm/kubeadm-upgrade/) to upgrade a kubeadm node \* [kubeadm alpha](/docs/reference/setup-tools/kubeadm/kubeadm-alpha/) to try experimental functionality
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-upgrade-phase.md
main
kubernetes
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This command initializes a new Kubernetes node and joins it to the existing cluster. {{< include "generated/kubeadm\_join/\_index.md" >}} ### The join workflow {#join-workflow} `kubeadm join` bootstraps a Kubernetes worker node or a control-plane node and adds it to the cluster. This action consists of the following steps for worker nodes: 1. kubeadm downloads necessary cluster information from the API server. By default, it uses the bootstrap token and the CA key hash to verify the authenticity of that data. The root CA can also be discovered directly via a file or URL. 1. Once the cluster information is known, kubelet can start the TLS bootstrapping process. The TLS bootstrap uses the shared token to temporarily authenticate with the Kubernetes API server to submit a certificate signing request (CSR); by default the control plane signs this CSR request automatically. 1. Finally, kubeadm configures the local kubelet to connect to the API server with the definitive identity assigned to the node. For control-plane nodes additional steps are performed: 1. Downloading certificates shared among control-plane nodes from the cluster (if explicitly requested by the user). 1. Generating control-plane component manifests, certificates and kubeconfig. 1. Adding new local etcd member. ### Using join phases with kubeadm {#join-phases} Kubeadm allows you join a node to the cluster in phases using `kubeadm join phase`. To view the ordered list of phases and sub-phases you can call `kubeadm join --help`. The list will be located at the top of the help screen and each phase will have a description next to it. Note that by calling `kubeadm join` all of the phases and sub-phases will be executed in this exact order. Some phases have unique flags, so if you want to have a look at the list of available options add `--help`, for example: ```shell kubeadm join phase kubelet-start --help ``` Similar to the [kubeadm init phase](/docs/reference/setup-tools/kubeadm/kubeadm-init/#init-phases) command, `kubeadm join phase` allows you to skip a list of phases using the `--skip-phases` flag. For example: ```shell sudo kubeadm join --skip-phases=preflight --config=config.yaml ``` {{< feature-state for\_k8s\_version="v1.22" state="beta" >}} Alternatively, you can use the `skipPhases` field in `JoinConfiguration`. ### Discovering what cluster CA to trust The kubeadm discovery has several options, each with security tradeoffs. The right method for your environment depends on how you provision nodes and the security expectations you have about your network and node lifecycles. #### Token-based discovery with CA pinning This is the default mode in kubeadm. In this mode, kubeadm downloads the cluster configuration (including root CA) and validates it using the token as well as validating that the root CA public key matches the provided hash and that the API server certificate is valid under the root CA. The CA key hash has the format `sha256:`. By default, the hash value is printed at the end of the `kubeadm init` command or in the output from the `kubeadm token create --print-join-command` command. It is in a standard format (see [RFC7469](https://tools.ietf.org/html/rfc7469#section-2.4)) and can also be calculated by 3rd party tools or provisioning systems. For example, using the OpenSSL CLI: ```shell openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.\* //' ``` \*\*Example `kubeadm join` commands:\*\* For worker nodes: ```shell kubeadm join --discovery-token abcdef.1234567890abcdef --discovery-token-ca-cert-hash sha256:1234..cdef 1.2.3.4:6443 ``` For control-plane nodes: ```shell kubeadm join --discovery-token abcdef.1234567890abcdef --discovery-token-ca-cert-hash sha256:1234..cdef --control-plane 1.2.3.4:6443 ``` You can also call `join` for a control-plane node with `--certificate-key` to copy certificates to this node, if the `kubeadm init` command was called with `--upload-certs`. \*\*Advantages:\*\* - Allows bootstrapping nodes to securely discover a root of trust for the control-plane node
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-join.md
main
kubernetes
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0.161163
join --discovery-token abcdef.1234567890abcdef --discovery-token-ca-cert-hash sha256:1234..cdef --control-plane 1.2.3.4:6443 ``` You can also call `join` for a control-plane node with `--certificate-key` to copy certificates to this node, if the `kubeadm init` command was called with `--upload-certs`. \*\*Advantages:\*\* - Allows bootstrapping nodes to securely discover a root of trust for the control-plane node even if other worker nodes or the network are compromised. - Convenient to execute manually since all of the information required fits into a single `kubeadm join` command. \*\*Disadvantages:\*\* - The CA hash is not normally known until the control-plane node has been provisioned, which can make it more difficult to build automated provisioning tools that use kubeadm. By generating your CA in beforehand, you may workaround this limitation. #### Token-based discovery without CA pinning This mode relies only on the symmetric token to sign (HMAC-SHA256) the discovery information that establishes the root of trust for the control-plane. To use the mode the joining nodes must skip the hash validation of the CA public key, using `--discovery-token-unsafe-skip-ca-verification`. You should consider using one of the other modes if possible. \*\*Example `kubeadm join` command:\*\* ```shell kubeadm join --token abcdef.1234567890abcdef --discovery-token-unsafe-skip-ca-verification 1.2.3.4:6443 ``` \*\*Advantages:\*\* - Still protects against many network-level attacks. - The token can be generated ahead of time and shared with the control-plane node and worker nodes, which can then bootstrap in parallel without coordination. This allows it to be used in many provisioning scenarios. \*\*Disadvantages:\*\* - If an attacker is able to steal a bootstrap token via some vulnerability, they can use that token (along with network-level access) to impersonate the control-plane node to other bootstrapping nodes. This may or may not be an appropriate tradeoff in your environment. #### File or HTTPS-based discovery This provides an out-of-band way to establish a root of trust between the control-plane node and bootstrapping nodes. Consider using this mode if you are building automated provisioning using kubeadm. The format of the discovery file is a regular Kubernetes [kubeconfig](/docs/tasks/access-application-cluster/configure-access-multiple-clusters/) file. In case the discovery file does not contain credentials, the TLS discovery token will be used. \*\*Example `kubeadm join` commands:\*\* - `kubeadm join --discovery-file path/to/file.conf` (local file) - `kubeadm join --discovery-file https://url/file.conf` (remote HTTPS URL) \*\*Advantages:\*\* - Allows bootstrapping nodes to securely discover a root of trust for the control-plane node even if the network or other worker nodes are compromised. \*\*Disadvantages:\*\* - Requires that you have some way to carry the discovery information from the control-plane node to the bootstrapping nodes. If the discovery file contains credentials you must keep it secret and transfer it over a secure channel. This might be possible with your cloud provider or provisioning tool. #### Use of custom kubelet credentials with `kubeadm join` To allow `kubeadm join` to use predefined kubelet credentials and skip client TLS bootstrap and CSR approval for a new node: 1. From a working control plane node in the cluster that has `/etc/kubernetes/pki/ca.key` execute `kubeadm kubeconfig user --org system:nodes --client-name system:node:$NODE > kubelet.conf`. `$NODE` must be set to the name of the new node. 2. Modify the resulted `kubelet.conf` manually to adjust the cluster name and the server endpoint, or run `kubeadm kubeconfig user --config` (it accepts `InitConfiguration`). If your cluster does not have the `ca.key` file, you must sign the embedded certificates in the `kubelet.conf` externally. For additional information, see [PKI certificates and requirements](/docs/setup/best-practices/certificates/) and [Certificate Management with kubeadm](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/#external-ca-mode). 1. Copy the resulting `kubelet.conf` to `/etc/kubernetes/kubelet.conf` on the new node. 2. Execute `kubeadm join` with the flag `--ignore-preflight-errors=FileAvailable--etc-kubernetes-kubelet.conf` on the new node. ### Securing your installation even more {#securing-more} The defaults for kubeadm may not work for everyone. This section documents how
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-join.md
main
kubernetes
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0.09529
and requirements](/docs/setup/best-practices/certificates/) and [Certificate Management with kubeadm](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/#external-ca-mode). 1. Copy the resulting `kubelet.conf` to `/etc/kubernetes/kubelet.conf` on the new node. 2. Execute `kubeadm join` with the flag `--ignore-preflight-errors=FileAvailable--etc-kubernetes-kubelet.conf` on the new node. ### Securing your installation even more {#securing-more} The defaults for kubeadm may not work for everyone. This section documents how to tighten up a kubeadm installation at the cost of some usability. #### Turning off auto-approval of node client certificates By default, there is a CSR auto-approver enabled that basically approves any client certificate request for a kubelet when a Bootstrap Token was used when authenticating. If you don't want the cluster to automatically approve kubelet client certs, you can turn it off by executing this command: ```shell kubectl delete clusterrolebinding kubeadm:node-autoapprove-bootstrap ``` After that, `kubeadm join` will block until the admin has manually approved the CSR in flight: 1. Using `kubectl get csr`, you can see that the original CSR is in the Pending state. ```shell kubectl get csr ``` The output is similar to this: ``` NAME AGE REQUESTOR CONDITION node-csr-c69HXe7aYcqkS1bKmH4faEnHAWxn6i2bHZ2mD04jZyQ 18s system:bootstrap:878f07 Pending ``` 2. `kubectl certificate approve` allows the admin to approve CSR.This action tells a certificate signing controller to issue a certificate to the requestor with the attributes requested in the CSR. ```shell kubectl certificate approve node-csr-c69HXe7aYcqkS1bKmH4faEnHAWxn6i2bHZ2mD04jZyQ ``` The output is similar to this: ``` certificatesigningrequest "node-csr-c69HXe7aYcqkS1bKmH4faEnHAWxn6i2bHZ2mD04jZyQ" approved ``` 3. This would change the CSR resource to Active state. ```shell kubectl get csr ``` The output is similar to this: ``` NAME AGE REQUESTOR CONDITION node-csr-c69HXe7aYcqkS1bKmH4faEnHAWxn6i2bHZ2mD04jZyQ 1m system:bootstrap:878f07 Approved,Issued ``` This forces the workflow that `kubeadm join` will only succeed if `kubectl certificate approve` has been run. #### Turning off public access to the `cluster-info` ConfigMap In order to achieve the joining flow using the token as the only piece of validation information, a ConfigMap with some data needed for validation of the control-plane node's identity is exposed publicly by default. While there is no private data in this ConfigMap, some users might wish to turn it off regardless. Doing so will disable the ability to use the `--discovery-token` flag of the `kubeadm join` flow. Here are the steps to do so: \* Fetch the `cluster-info` file from the API Server: ```shell kubectl -n kube-public get cm cluster-info -o jsonpath='{.data.kubeconfig}' | tee cluster-info.yaml ``` The output is similar to this: ```yaml apiVersion: v1 kind: Config clusters: - cluster: certificate-authority-data: server: https://: name: "" contexts: [] current-context: "" preferences: {} users: [] ``` \* Use the `cluster-info.yaml` file as an argument to `kubeadm join --discovery-file`. \* Turn off public access to the `cluster-info` ConfigMap: ```shell kubectl -n kube-public delete rolebinding kubeadm:bootstrap-signer-clusterinfo ``` These commands should be run after `kubeadm init` but before `kubeadm join`. ### Using kubeadm join with a configuration file {#config-file} {{< caution >}} The config file is still considered beta and may change in future versions. {{< /caution >}} It's possible to configure `kubeadm join` with a configuration file instead of command line flags, and some more advanced features may only be available as configuration file options. This file is passed using the `--config` flag and it must contain a `JoinConfiguration` structure. Mixing `--config` with others flags may not be allowed in some cases. The default configuration can be printed out using the [kubeadm config print](/docs/reference/setup-tools/kubeadm/kubeadm-config/#cmd-config-print) command. If your configuration is not using the latest version it is \*\*recommended\*\* that you migrate using the [kubeadm config migrate](/docs/reference/setup-tools/kubeadm/kubeadm-config/#cmd-config-migrate) command. For more information on the fields and usage of the configuration you can navigate to our [API reference](/docs/reference/config-api/kubeadm-config.v1beta4/). ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node. \* [kubeadm token](/docs/reference/setup-tools/kubeadm/kubeadm-token/)
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-join.md
main
kubernetes
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0.039471
the latest version it is \*\*recommended\*\* that you migrate using the [kubeadm config migrate](/docs/reference/setup-tools/kubeadm/kubeadm-config/#cmd-config-migrate) command. For more information on the fields and usage of the configuration you can navigate to our [API reference](/docs/reference/config-api/kubeadm-config.v1beta4/). ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node. \* [kubeadm token](/docs/reference/setup-tools/kubeadm/kubeadm-token/) to manage tokens for `kubeadm join`. \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join`.
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-join.md
main
kubernetes
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0.088069
`kubeadm kubeconfig` provides utilities for managing kubeconfig files. For examples on how to use `kubeadm kubeconfig user` see [Generating kubeconfig files for additional users](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs#kubeconfig-additional-users). ## kubeadm kubeconfig {#cmd-kubeconfig} {{< tabs name="tab-kubeconfig" >}} {{< tab name="overview" include="generated/kubeadm\_kubeconfig/\_index.md" />}} {{< /tabs >}} ## kubeadm kubeconfig user {#cmd-kubeconfig-user} This command can be used to output a kubeconfig file for an additional user. {{< tabs name="tab-kubeconfig-user" >}} {{< tab name="user" include="generated/kubeadm\_kubeconfig/kubeadm\_kubeconfig\_user.md" />}} {{< /tabs >}}
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-kubeconfig.md
main
kubernetes
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0.070759
`kubeadm certs` provides utilities for managing certificates. For more details on how these commands can be used, see [Certificate Management with kubeadm](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/). ## kubeadm certs {#cmd-certs} A collection of operations for operating Kubernetes certificates. {{< tabs name="tab-certs" >}} {{< tab name="overview" include="generated/kubeadm\_certs/\_index.md" />}} {{< /tabs >}} ## kubeadm certs renew {#cmd-certs-renew} You can renew all Kubernetes certificates using the `all` subcommand or renew them selectively. For more details see [Manual certificate renewal](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/#manual-certificate-renewal). {{< tabs name="tab-certs-renew" >}} {{< tab name="renew" include="generated/kubeadm\_certs/kubeadm\_certs\_renew.md" />}} {{< tab name="all" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_all.md" />}} {{< tab name="admin.conf" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_admin.conf.md" />}} {{< tab name="apiserver-etcd-client" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_apiserver-etcd-client.md" />}} {{< tab name="apiserver-kubelet-client" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_apiserver-kubelet-client.md" />}} {{< tab name="apiserver" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_apiserver.md" />}} {{< tab name="controller-manager.conf" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_controller-manager.conf.md" />}} {{< tab name="etcd-healthcheck-client" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_etcd-healthcheck-client.md" />}} {{< tab name="etcd-peer" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_etcd-peer.md" />}} {{< tab name="etcd-server" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_etcd-server.md" />}} {{< tab name="front-proxy-client" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_front-proxy-client.md" />}} {{< tab name="scheduler.conf" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_scheduler.conf.md" />}} {{< tab name="super-admin.conf" include="generated/kubeadm\_certs/kubeadm\_certs\_renew\_super-admin.conf.md" />}} {{< /tabs >}} ## kubeadm certs certificate-key {#cmd-certs-certificate-key} This command can be used to generate a new control-plane certificate key. The key can be passed as `--certificate-key` to [`kubeadm init`](/docs/reference/setup-tools/kubeadm/kubeadm-init) and [`kubeadm join`](/docs/reference/setup-tools/kubeadm/kubeadm-join) to enable the automatic copy of certificates when joining additional control-plane nodes. {{< tabs name="tab-certs-certificate-key" >}} {{< tab name="certificate-key" include="generated/kubeadm\_certs/kubeadm\_certs\_certificate-key.md" />}} {{< /tabs >}} ## kubeadm certs check-expiration {#cmd-certs-check-expiration} This command checks expiration for the certificates in the local PKI managed by kubeadm. For more details see [Check certificate expiration](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/#check-certificate-expiration). {{< tabs name="tab-certs-check-expiration" >}} {{< tab name="check-expiration" include="generated/kubeadm\_certs/kubeadm\_certs\_check-expiration.md" />}} {{< /tabs >}} ## kubeadm certs generate-csr {#cmd-certs-generate-csr} This command can be used to generate keys and CSRs for all control-plane certificates and kubeconfig files. The user can then sign the CSRs with a CA of their choice. To read more information on how to use the command see [Signing certificate signing requests (CSR) generated by kubeadm](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs#signing-csr). {{< tabs name="tab-certs-generate-csr" >}} {{< tab name="generate-csr" include="generated/kubeadm\_certs/kubeadm\_certs\_generate-csr.md" />}} {{< /tabs >}} ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join`
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-certs.md
main
kubernetes
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0.070735
During `kubeadm init`, kubeadm uploads the `ClusterConfiguration` object to your cluster in a ConfigMap called `kubeadm-config` in the `kube-system` namespace. This configuration is then read during `kubeadm join`, `kubeadm reset` and `kubeadm upgrade`. You can use `kubeadm config print` to print the default static configuration that kubeadm uses for `kubeadm init` and `kubeadm join`. {{< note >}} The output of the command is meant to serve as an example. You must manually edit the output of this command to adapt to your setup. Remove the fields that you are not certain about and kubeadm will try to default them on runtime by examining the host. {{< /note >}} For more information on `init` and `join` navigate to [Using kubeadm init with a configuration file](/docs/reference/setup-tools/kubeadm/kubeadm-init/#config-file) or [Using kubeadm join with a configuration file](/docs/reference/setup-tools/kubeadm/kubeadm-join/#config-file). For more information on using the kubeadm configuration API navigate to [Customizing components with the kubeadm API](/docs/setup/production-environment/tools/kubeadm/control-plane-flags). You can use `kubeadm config migrate` to convert your old configuration files that contain a deprecated API version to a newer, supported API version. `kubeadm config validate` can be used for validating a configuration file. `kubeadm config images list` and `kubeadm config images pull` can be used to list and pull the images that kubeadm requires. ## kubeadm config print {#cmd-config-print} {{< include "generated/kubeadm\_config/kubeadm\_config\_print.md" >}} ## kubeadm config print init-defaults {#cmd-config-print-init-defaults} {{< include "generated/kubeadm\_config/kubeadm\_config\_print\_init-defaults.md" >}} ## kubeadm config print join-defaults {#cmd-config-print-join-defaults} {{< include "generated/kubeadm\_config/kubeadm\_config\_print\_join-defaults.md" >}} ## kubeadm config migrate {#cmd-config-migrate} {{< include "generated/kubeadm\_config/kubeadm\_config\_migrate.md" >}} ## kubeadm config validate {#cmd-config-validate} {{< include "generated/kubeadm\_config/kubeadm\_config\_validate.md" >}} ## kubeadm config images list {#cmd-config-images-list} {{< include "generated/kubeadm\_config/kubeadm\_config\_images\_list.md" >}} ## kubeadm config images pull {#cmd-config-images-pull} {{< include "generated/kubeadm\_config/kubeadm\_config\_images\_pull.md" >}} ## {{% heading "whatsnext" %}} \* [kubeadm upgrade](/docs/reference/setup-tools/kubeadm/kubeadm-upgrade/) to upgrade a Kubernetes cluster to a newer version
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-config.md
main
kubernetes
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0.109973
Performs a best effort revert of changes made by `kubeadm init` or `kubeadm join`. {{< include "generated/kubeadm\_reset/\_index.md" >}} ### Reset workflow {#reset-workflow} `kubeadm reset` is responsible for cleaning up a node local file system from files that were created using the `kubeadm init` or `kubeadm join` commands. For control-plane nodes `reset` also removes the local stacked etcd member of this node from the etcd cluster. `kubeadm reset phase` can be used to execute the separate phases of the above workflow. To skip a list of phases you can use the `--skip-phases` flag, which works in a similar way to the `kubeadm join` and `kubeadm init` phase runners. `kubeadm reset` also supports the `--config` flag for passing a [`ResetConfiguration` structure](/docs/reference/config-api/kubeadm-config.v1beta4/). ### Cleanup of external etcd members `kubeadm reset` will not delete any etcd data if external etcd is used. This means that if you run `kubeadm init` again using the same etcd endpoints, you will see state from previous clusters. To wipe etcd data it is recommended you use a client like etcdctl, such as: ```bash etcdctl del "" --prefix ``` See the [etcd documentation](https://github.com/coreos/etcd/tree/master/etcdctl) for more information. ### Cleanup of CNI configuration CNI plugins use the directory `/etc/cni/net.d` to store their configuration. The `kubeadm reset` command does not cleanup that directory. Leaving the configuration of a CNI plugin on a host can be problematic if the same host is later used as a new Kubernetes node and a different CNI plugin happens to be deployed in that cluster. It can result in a configuration conflict between CNI plugins. To cleanup the directory, backup its contents if needed and then execute the following command: ```bash sudo rm -rf /etc/cni/net.d ``` ### Cleanup of network traffic rules The `kubeadm reset` command does not clean any iptables, nftables or IPVS rules applied to the host by kube-proxy. A control loop in kube-proxy ensures that the rules on each node host are synchronized. For additional details please see [Virtual IPs and Service Proxies](/docs/reference/networking/virtual-ips/). Leaving the rules without cleanup should not cause any issues if the host is later reused as a Kubernetes node or if it will serve a different purpose. If you wish to perform this cleanup, you can use the same kube-proxy container which was used in your cluster and the `--cleanup` flag of the `kube-proxy` binary: ```bash docker run --privileged --rm registry.k8s.io/kube-proxy:v{{< skew currentPatchVersion >}} sh -c "kube-proxy --cleanup && echo DONE" ``` The output of the above command should print `DONE` at the end. Instead of Docker, you can use your preferred container runtime to start the container. ### Cleanup of $HOME/.kube The `$HOME/.kube` directory typically contains configuration files and kubectl cache. While not cleaning the contents of `$HOME/.kube/cache` is not an issue, there is one important file in the directory. That is `$HOME/.kube/config` and it is used by kubectl to authenticate to the Kubernetes API server. After `kubeadm init` finishes, the user is instructed to copy the `/etc/kubernetes/admin.conf` file to the `$HOME/.kube/config` location and grant the current user access to it. The `kubeadm reset` command does not clean any of the contents of the `$HOME/.kube` directory. Leaving the `$HOME/.kube/config` file without deleting it, can be problematic depending on who will have access to this host after `kubeadm reset` was called. If the same cluster continues to exist, it is highly recommended to delete the file, as the admin credentials stored in it will continue to be valid. To cleanup the directory, examine its contents, perform backup if needed and execute the following command: ```bash rm -rf $HOME/.kube ``` ### Graceful kube-apiserver shutdown If you have your `kube-apiserver` configured with
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-reset.md
main
kubernetes
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0.085973
highly recommended to delete the file, as the admin credentials stored in it will continue to be valid. To cleanup the directory, examine its contents, perform backup if needed and execute the following command: ```bash rm -rf $HOME/.kube ``` ### Graceful kube-apiserver shutdown If you have your `kube-apiserver` configured with the `--shutdown-delay-duration` flag, you can run the following commands to attempt a graceful shutdown for the running API server Pod, before you run `kubeadm reset`: ```bash yq eval -i '.spec.containers[0].command = []' /etc/kubernetes/manifests/kube-apiserver.yaml timeout 60 sh -c 'while pgrep kube-apiserver >/dev/null; do sleep 1; done' || true ``` ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to bootstrap a Kubernetes worker node and join it to the cluster
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/kubeadm-reset.md
main
kubernetes
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0.051012
Kubeadm is a tool built to provide `kubeadm init` and `kubeadm join` as best-practice "fast paths" for creating Kubernetes clusters. kubeadm performs the actions necessary to get a minimum viable cluster up and running. By design, it cares only about bootstrapping, not about provisioning machines. Likewise, installing various nice-to-have addons, like the Kubernetes Dashboard, monitoring solutions, and cloud-specific addons, is not in scope. Instead, we expect higher-level and more tailored tooling to be built on top of kubeadm, and ideally, using kubeadm as the basis of all deployments will make it easier to create conformant clusters. ## How to install To install kubeadm, see the [installation guide](/docs/setup/production-environment/tools/kubeadm/install-kubeadm). ## {{% heading "whatsnext" %}} \* [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init) to bootstrap a Kubernetes control-plane node \* [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join) to bootstrap a Kubernetes worker node and join it to the cluster \* [kubeadm upgrade](/docs/reference/setup-tools/kubeadm/kubeadm-upgrade) to upgrade a Kubernetes cluster to a newer version \* [kubeadm config](/docs/reference/setup-tools/kubeadm/kubeadm-config) if you initialized your cluster using kubeadm v1.7.x or lower, to configure your cluster for `kubeadm upgrade` \* [kubeadm token](/docs/reference/setup-tools/kubeadm/kubeadm-token) to manage tokens for `kubeadm join` \* [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset) to revert any changes made to this host by `kubeadm init` or `kubeadm join` \* [kubeadm certs](/docs/reference/setup-tools/kubeadm/kubeadm-certs) to manage Kubernetes certificates \* [kubeadm kubeconfig](/docs/reference/setup-tools/kubeadm/kubeadm-kubeconfig) to manage kubeconfig files \* [kubeadm version](/docs/reference/setup-tools/kubeadm/kubeadm-version) to print the kubeadm version \* [kubeadm alpha](/docs/reference/setup-tools/kubeadm/kubeadm-alpha) to preview a set of features made available for gathering feedback from the community
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/_index.md
main
kubernetes
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0.146318
kubeadm: easily bootstrap a secure Kubernetes cluster ### Synopsis ┌──────────────────────────────────────────────────────────┐ │ KUBEADM │ │ Easily bootstrap a secure Kubernetes cluster │ │ │ │ Please give us feedback at: │ │ https://github.com/kubernetes/kubeadm/issues │ └──────────────────────────────────────────────────────────┘ Example usage: Create a two-machine cluster with one control-plane node (which controls the cluster), and one worker node (where your workloads, like Pods and Deployments run). ┌──────────────────────────────────────────────────────────┐ │ On the first machine: │ ├──────────────────────────────────────────────────────────┤ │ control-plane# kubeadm init │ └──────────────────────────────────────────────────────────┘ ┌──────────────────────────────────────────────────────────┐ │ On the second machine: │ ├──────────────────────────────────────────────────────────┤ │ worker# kubeadm join <arguments-returned-from-init> │ └──────────────────────────────────────────────────────────┘ You can then repeat the second step on as many other machines as you like. ### Options | -h, --help | | | --- | --- | | | help for kubeadm | | --rootfs string | | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm.md
main
kubernetes
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0.133135
### Synopsis Output a kubeconfig file for an additional user. ``` kubeadm kubeconfig user [flags] ``` ### Examples ``` # Output a kubeconfig file for an additional user named foo kubeadm kubeconfig user --client-name=foo # Output a kubeconfig file for an additional user named foo using a kubeadm config file bar kubeadm kubeconfig user --client-name=foo --config=bar ``` ### Options | --client-name string | | | --- | --- | | | The name of user. It will be used as the CN if client certificates are created | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for user | | --org strings | | | | The organizations of the client certificate. It will be used as the O if client certificates are created | | --token string | | | | The token that should be used as the authentication mechanism for this kubeconfig, instead of client certificates | | --validity-period duration Default: 8760h0m0s | | | | The validity period of the client certificate. It is an offset from the current time. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_kubeconfig/kubeadm_kubeconfig_user.md
main
kubernetes
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0.065286
### Synopsis Renew the certificate embedded in the kubeconfig file for the super-admin. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew super-admin.conf [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for super-admin.conf | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_super-admin.conf.md
main
kubernetes
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0.010625
Generate keys and certificate signing requests ### Synopsis Generates keys and certificate signing requests (CSRs) for all the certificates required to run the control plane. This command also generates partial kubeconfig files with private key data in the "users > user > client-key-data" field, and for each kubeconfig file an accompanying ".csr" file is created. This command is designed for use in [Kubeadm External CA Mode](https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/#external-ca-mode). It generates CSRs which you can then submit to your external certificate authority for signing. The PEM encoded signed certificates should then be saved alongside the key files, using ".crt" as the file extension, or in the case of kubeconfig files, the PEM encoded signed certificate should be base64 encoded and added to the kubeconfig file in the "users > user > client-certificate-data" field. ``` kubeadm certs generate-csr [flags] ``` ### Examples ``` # The following command will generate keys and CSRs for all control-plane certificates and kubeconfig files: kubeadm certs generate-csr --kubeconfig-dir /tmp/etc-k8s --cert-dir /tmp/etc-k8s/pki ``` ### Options | --cert-dir string | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for generate-csr | | --kubeconfig-dir string Default: "/etc/kubernetes" | | | | The path where to save the kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_generate-csr.md
main
kubernetes
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0.063148
### Synopsis Renew the certificate for etcd nodes to communicate with each other. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew etcd-peer [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for etcd-peer | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_etcd-peer.md
main
kubernetes
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0.009108
### Synopsis Renew the certificate for liveness probes to healthcheck etcd. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew etcd-healthcheck-client [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for etcd-healthcheck-client | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_etcd-healthcheck-client.md
main
kubernetes
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0.007587
### Synopsis Renew the certificate for serving etcd. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew etcd-server [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for etcd-server | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_etcd-server.md
main
kubernetes
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0.004542
### Synopsis Renew the certificate for serving the Kubernetes API. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew apiserver [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for apiserver | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_apiserver.md
main
kubernetes
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0.045494
### Synopsis Renew the certificate embedded in the kubeconfig file for the admin to use and for kubeadm itself. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew admin.conf [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for admin.conf | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_admin.conf.md
main
kubernetes
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0.02385
Check certificates expiration for a Kubernetes cluster ### Synopsis Checks expiration for the certificates in the local PKI managed by kubeadm. ``` kubeadm certs check-expiration [flags] ``` ### Options | --allow-missing-template-keys Default: true | | | --- | --- | | | If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats. | | --cert-dir string Default: "/etc/kubernetes/pki" | | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for check-expiration | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | | -o, --output string Default: "text" | | | | Output format. One of: text|json|yaml|kyaml|go-template|go-template-file|template|templatefile|jsonpath|jsonpath-as-json|jsonpath-file. | | --show-managed-fields | | | | If true, keep the managedFields when printing objects in JSON or YAML format. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_check-expiration.md
main
kubernetes
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0.058746
### Synopsis Renew the certificate embedded in the kubeconfig file for the controller manager to use. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew controller-manager.conf [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for controller-manager.conf | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_controller-manager.conf.md
main
kubernetes
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0.018029
### Synopsis Renew the certificate the apiserver uses to access etcd. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew apiserver-etcd-client [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for apiserver-etcd-client | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_apiserver-etcd-client.md
main
kubernetes
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0.01933
### Synopsis Renew the certificate embedded in the kubeconfig file for the scheduler manager to use. Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them. Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request. After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere. ``` kubeadm certs renew scheduler.conf [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for scheduler.conf | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_scheduler.conf.md
main
kubernetes
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0.030342
Renew all available certificates ### Synopsis Renew all known certificates necessary to run the control plane. Renewals are run unconditionally, regardless of expiration date. Renewals can also be run individually for more control. ``` kubeadm certs renew all [flags] ``` ### Options | --cert-dir string Default: "/etc/kubernetes/pki" | | | --- | --- | | | The path where to save the certificates | | --config string | | | | Path to a kubeadm configuration file. | | -h, --help | | | | help for all | | --kubeconfig string Default: "/etc/kubernetes/admin.conf" | | | | The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | ### Options inherited from parent commands | --rootfs string | | | --- | --- | | | The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. |
https://github.com/kubernetes/website/blob/main//content/en/docs/reference/setup-tools/kubeadm/generated/kubeadm_certs/kubeadm_certs_renew_all.md
main
kubernetes
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