Chapter 9. MachineHealthCheck [machine.openshift.io/v1beta1] Description MachineHealthCheck is the Schema for the machinehealthchecks API Compatibility level 2: Stable within a major release for a minimum of 9 months or 3 minor releases (whichever is longer). Type object 9.1. Specification Property Type Description apiVersion string APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources kind string Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds metadata ObjectMeta Standard object's metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata spec object Specification of machine health check policy status object Most recently observed status of MachineHealthCheck resource 9.1.1. .spec Description Specification of machine health check policy Type object Property Type Description maxUnhealthy integer-or-string Any farther remediation is only allowed if at most "MaxUnhealthy" machines selected by "selector" are not healthy. Expects either a postive integer value or a percentage value. Percentage values must be positive whole numbers and are capped at 100%. Both 0 and 0% are valid and will block all remediation. nodeStartupTimeout string Machines older than this duration without a node will be considered to have failed and will be remediated. To prevent Machines without Nodes from being removed, disable startup checks by setting this value explicitly to "0". Expects an unsigned duration string of decimal numbers each with optional fraction and a unit suffix, eg "300ms", "1.5h" or "2h45m". Valid time units are "ns", "us" (or "ms"), "ms", "s", "m", "h". remediationTemplate object RemediationTemplate is a reference to a remediation template provided by an infrastructure provider. This field is completely optional, when filled, the MachineHealthCheck controller creates a new object from the template referenced and hands off remediation of the machine to a controller that lives outside of Machine API Operator. selector object Label selector to match machines whose health will be exercised. Note: An empty selector will match all machines. unhealthyConditions array UnhealthyConditions contains a list of the conditions that determine whether a node is considered unhealthy. The conditions are combined in a logical OR, i.e. if any of the conditions is met, the node is unhealthy. unhealthyConditions[] object UnhealthyCondition represents a Node condition type and value with a timeout specified as a duration. When the named condition has been in the given status for at least the timeout value, a node is considered unhealthy. 9.1.2. .spec.remediationTemplate Description RemediationTemplate is a reference to a remediation template provided by an infrastructure provider. This field is completely optional, when filled, the MachineHealthCheck controller creates a new object from the template referenced and hands off remediation of the machine to a controller that lives outside of Machine API Operator. Type object Property Type Description apiVersion string API version of the referent. fieldPath string If referring to a piece of an object instead of an entire object, this string should contain a valid JSON/Go field access statement, such as desiredState.manifest.containers[2]. For example, if the object reference is to a container within a pod, this would take on a value like: "spec.containers{name}" (where "name" refers to the name of the container that triggered the event) or if no container name is specified "spec.containers[2]" (container with index 2 in this pod). This syntax is chosen only to have some well-defined way of referencing a part of an object. TODO: this design is not final and this field is subject to change in the future. kind string Kind of the referent. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds name string Name of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names namespace string Namespace of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/ resourceVersion string Specific resourceVersion to which this reference is made, if any. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#concurrency-control-and-consistency uid string UID of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#uids 9.1.3. .spec.selector Description Label selector to match machines whose health will be exercised. Note: An empty selector will match all machines. Type object Property Type Description matchExpressions array matchExpressions is a list of label selector requirements. The requirements are ANDed. matchExpressions[] object A label selector requirement is a selector that contains values, a key, and an operator that relates the key and values. matchLabels object (string) matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels map is equivalent to an element of matchExpressions, whose key field is "key", the operator is "In", and the values array contains only "value". The requirements are ANDed. 9.1.4. .spec.selector.matchExpressions Description matchExpressions is a list of label selector requirements. The requirements are ANDed. Type array 9.1.5. .spec.selector.matchExpressions[] Description A label selector requirement is a selector that contains values, a key, and an operator that relates the key and values. Type object Required key operator Property Type Description key string key is the label key that the selector applies to. operator string operator represents a key's relationship to a set of values. Valid operators are In, NotIn, Exists and DoesNotExist. values array (string) values is an array of string values. If the operator is In or NotIn, the values array must be non-empty. If the operator is Exists or DoesNotExist, the values array must be empty. This array is replaced during a strategic merge patch. 9.1.6. .spec.unhealthyConditions Description UnhealthyConditions contains a list of the conditions that determine whether a node is considered unhealthy. The conditions are combined in a logical OR, i.e. if any of the conditions is met, the node is unhealthy. Type array 9.1.7. .spec.unhealthyConditions[] Description UnhealthyCondition represents a Node condition type and value with a timeout specified as a duration. When the named condition has been in the given status for at least the timeout value, a node is considered unhealthy. Type object Property Type Description status string timeout string Expects an unsigned duration string of decimal numbers each with optional fraction and a unit suffix, eg "300ms", "1.5h" or "2h45m". Valid time units are "ns", "us" (or "ms"), "ms", "s", "m", "h". type string 9.1.8. .status Description Most recently observed status of MachineHealthCheck resource Type object Property Type Description conditions array Conditions defines the current state of the MachineHealthCheck conditions[] object Condition defines an observation of a Machine API resource operational state. currentHealthy integer total number of machines counted by this machine health check expectedMachines integer total number of machines counted by this machine health check remediationsAllowed integer RemediationsAllowed is the number of further remediations allowed by this machine health check before maxUnhealthy short circuiting will be applied 9.1.9. .status.conditions Description Conditions defines the current state of the MachineHealthCheck Type array 9.1.10. .status.conditions[] Description Condition defines an observation of a Machine API resource operational state. Type object Property Type Description lastTransitionTime string Last time the condition transitioned from one status to another. This should be when the underlying condition changed. If that is not known, then using the time when the API field changed is acceptable. message string A human readable message indicating details about the transition. This field may be empty. reason string The reason for the condition's last transition in CamelCase. The specific API may choose whether or not this field is considered a guaranteed API. This field may not be empty. severity string Severity provides an explicit classification of Reason code, so the users or machines can immediately understand the current situation and act accordingly. The Severity field MUST be set only when Status=False. status string Status of the condition, one of True, False, Unknown. type string Type of condition in CamelCase or in foo.example.com/CamelCase. Many .condition.type values are consistent across resources like Available, but because arbitrary conditions can be useful (see .node.status.conditions), the ability to deconflict is important. 9.2. API endpoints The following API endpoints are available: /apis/machine.openshift.io/v1beta1/machinehealthchecks GET : list objects of kind MachineHealthCheck /apis/machine.openshift.io/v1beta1/namespaces/{namespace}/machinehealthchecks DELETE : delete collection of MachineHealthCheck GET : list objects of kind MachineHealthCheck POST : create a MachineHealthCheck /apis/machine.openshift.io/v1beta1/namespaces/{namespace}/machinehealthchecks/{name} DELETE : delete a MachineHealthCheck GET : read the specified MachineHealthCheck PATCH : partially update the specified MachineHealthCheck PUT : replace the specified MachineHealthCheck /apis/machine.openshift.io/v1beta1/namespaces/{namespace}/machinehealthchecks/{name}/status GET : read status of the specified MachineHealthCheck PATCH : partially update status of the specified MachineHealthCheck PUT : replace status of the specified MachineHealthCheck 9.2.1. /apis/machine.openshift.io/v1beta1/machinehealthchecks HTTP method GET Description list objects of kind MachineHealthCheck Table 9.1. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheckList schema 401 - Unauthorized Empty 9.2.2. /apis/machine.openshift.io/v1beta1/namespaces/{namespace}/machinehealthchecks HTTP method DELETE Description delete collection of MachineHealthCheck Table 9.2. HTTP responses HTTP code Reponse body 200 - OK Status schema 401 - Unauthorized Empty HTTP method GET Description list objects of kind MachineHealthCheck Table 9.3. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheckList schema 401 - Unauthorized Empty HTTP method POST Description create a MachineHealthCheck Table 9.4. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 9.5. Body parameters Parameter Type Description body MachineHealthCheck schema Table 9.6. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheck schema 201 - Created MachineHealthCheck schema 202 - Accepted MachineHealthCheck schema 401 - Unauthorized Empty 9.2.3. /apis/machine.openshift.io/v1beta1/namespaces/{namespace}/machinehealthchecks/{name} Table 9.7. Global path parameters Parameter Type Description name string name of the MachineHealthCheck HTTP method DELETE Description delete a MachineHealthCheck Table 9.8. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed Table 9.9. HTTP responses HTTP code Reponse body 200 - OK Status schema 202 - Accepted Status schema 401 - Unauthorized Empty HTTP method GET Description read the specified MachineHealthCheck Table 9.10. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheck schema 401 - Unauthorized Empty HTTP method PATCH Description partially update the specified MachineHealthCheck Table 9.11. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 9.12. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheck schema 401 - Unauthorized Empty HTTP method PUT Description replace the specified MachineHealthCheck Table 9.13. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 9.14. Body parameters Parameter Type Description body MachineHealthCheck schema Table 9.15. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheck schema 201 - Created MachineHealthCheck schema 401 - Unauthorized Empty 9.2.4. /apis/machine.openshift.io/v1beta1/namespaces/{namespace}/machinehealthchecks/{name}/status Table 9.16. Global path parameters Parameter Type Description name string name of the MachineHealthCheck HTTP method GET Description read status of the specified MachineHealthCheck Table 9.17. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheck schema 401 - Unauthorized Empty HTTP method PATCH Description partially update status of the specified MachineHealthCheck Table 9.18. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 9.19. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheck schema 401 - Unauthorized Empty HTTP method PUT Description replace status of the specified MachineHealthCheck Table 9.20. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 9.21. Body parameters Parameter Type Description body MachineHealthCheck schema Table 9.22. HTTP responses HTTP code Reponse body 200 - OK MachineHealthCheck schema 201 - Created MachineHealthCheck schema 401 - Unauthorized Empty

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