Chapter 5. RuntimeClass [node.k8s.io/v1] Description RuntimeClass defines a class of container runtime supported in the cluster. The RuntimeClass is used to determine which container runtime is used to run all containers in a pod. RuntimeClasses are manually defined by a user or cluster provisioner, and referenced in the PodSpec. The Kubelet is responsible for resolving the RuntimeClassName reference before running the pod. For more details, see https://kubernetes.io/docs/concepts/containers/runtime-class/ Type object Required handler 5.1. 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 handler string handler specifies the underlying runtime and configuration that the CRI implementation will use to handle pods of this class. The possible values are specific to the node & CRI configuration. It is assumed that all handlers are available on every node, and handlers of the same name are equivalent on every node. For example, a handler called "runc" might specify that the runc OCI runtime (using native Linux containers) will be used to run the containers in a pod. The Handler must be lowercase, conform to the DNS Label (RFC 1123) requirements, and is immutable. 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 More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata overhead object Overhead structure represents the resource overhead associated with running a pod. scheduling object Scheduling specifies the scheduling constraints for nodes supporting a RuntimeClass. 5.1.1. .overhead Description Overhead structure represents the resource overhead associated with running a pod. Type object Property Type Description podFixed object (Quantity) podFixed represents the fixed resource overhead associated with running a pod. 5.1.2. .scheduling Description Scheduling specifies the scheduling constraints for nodes supporting a RuntimeClass. Type object Property Type Description nodeSelector object (string) nodeSelector lists labels that must be present on nodes that support this RuntimeClass. Pods using this RuntimeClass can only be scheduled to a node matched by this selector. The RuntimeClass nodeSelector is merged with a pod's existing nodeSelector. Any conflicts will cause the pod to be rejected in admission. tolerations array (Toleration) tolerations are appended (excluding duplicates) to pods running with this RuntimeClass during admission, effectively unioning the set of nodes tolerated by the pod and the RuntimeClass. 5.2. API endpoints The following API endpoints are available: /apis/node.k8s.io/v1/runtimeclasses DELETE : delete collection of RuntimeClass GET : list or watch objects of kind RuntimeClass POST : create a RuntimeClass /apis/node.k8s.io/v1/watch/runtimeclasses GET : watch individual changes to a list of RuntimeClass. deprecated: use the 'watch' parameter with a list operation instead. /apis/node.k8s.io/v1/runtimeclasses/{name} DELETE : delete a RuntimeClass GET : read the specified RuntimeClass PATCH : partially update the specified RuntimeClass PUT : replace the specified RuntimeClass /apis/node.k8s.io/v1/watch/runtimeclasses/{name} GET : watch changes to an object of kind RuntimeClass. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter. 5.2.1. /apis/node.k8s.io/v1/runtimeclasses HTTP method DELETE Description delete collection of RuntimeClass Table 5.1. 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 5.2. HTTP responses HTTP code Reponse body 200 - OK Status schema 401 - Unauthorized Empty HTTP method GET Description list or watch objects of kind RuntimeClass Table 5.3. HTTP responses HTTP code Reponse body 200 - OK RuntimeClassList schema 401 - Unauthorized Empty HTTP method POST Description create a RuntimeClass Table 5.4. 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 5.5. Body parameters Parameter Type Description body RuntimeClass schema Table 5.6. HTTP responses HTTP code Reponse body 200 - OK RuntimeClass schema 201 - Created RuntimeClass schema 202 - Accepted RuntimeClass schema 401 - Unauthorized Empty 5.2.2. /apis/node.k8s.io/v1/watch/runtimeclasses HTTP method GET Description watch individual changes to a list of RuntimeClass. deprecated: use the 'watch' parameter with a list operation instead. Table 5.7. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 5.2.3. /apis/node.k8s.io/v1/runtimeclasses/{name} Table 5.8. Global path parameters Parameter Type Description name string name of the RuntimeClass HTTP method DELETE Description delete a RuntimeClass Table 5.9. 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 5.10. HTTP responses HTTP code Reponse body 200 - OK Status schema 202 - Accepted Status schema 401 - Unauthorized Empty HTTP method GET Description read the specified RuntimeClass Table 5.11. HTTP responses HTTP code Reponse body 200 - OK RuntimeClass schema 401 - Unauthorized Empty HTTP method PATCH Description partially update the specified RuntimeClass Table 5.12. 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 5.13. HTTP responses HTTP code Reponse body 200 - OK RuntimeClass schema 201 - Created RuntimeClass schema 401 - Unauthorized Empty HTTP method PUT Description replace the specified RuntimeClass Table 5.14. 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 5.15. Body parameters Parameter Type Description body RuntimeClass schema Table 5.16. HTTP responses HTTP code Reponse body 200 - OK RuntimeClass schema 201 - Created RuntimeClass schema 401 - Unauthorized Empty 5.2.4. /apis/node.k8s.io/v1/watch/runtimeclasses/{name} Table 5.17. Global path parameters Parameter Type Description name string name of the RuntimeClass HTTP method GET Description watch changes to an object of kind RuntimeClass. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter. Table 5.18. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty

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