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RuntimeClass

RuntimeClass defines a class of container runtime supported in the cluster.

apiVersion: node.k8s.io/v1

import "k8s.io/api/node/v1"

RuntimeClass

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/

  • apiVersion: node.k8s.io/v1

  • kind: RuntimeClass

  • metadata (ObjectMeta)

    More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata

  • handler (string), required

    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.

  • overhead (Overhead)

    Overhead represents the resource overhead associated with running a pod for a given RuntimeClass. For more details, see https://kubernetes.io/docs/concepts/scheduling-eviction/pod-overhead/ This field is in beta starting v1.18 and is only honored by servers that enable the PodOverhead feature.

    Overhead structure represents the resource overhead associated with running a pod.

    • overhead.podFixed (map[string]Quantity)

      PodFixed represents the fixed resource overhead associated with running a pod.

  • scheduling (Scheduling)

    Scheduling holds the scheduling constraints to ensure that pods running with this RuntimeClass are scheduled to nodes that support it. If scheduling is nil, this RuntimeClass is assumed to be supported by all nodes.

    Scheduling specifies the scheduling constraints for nodes supporting a RuntimeClass.

    • scheduling.nodeSelector (map[string]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.

    • scheduling.tolerations ([]Toleration)

      Atomic: will be replaced during a merge

      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.

      The pod this Toleration is attached to tolerates any taint that matches the triple <key,value,effect> using the matching operator .

      • scheduling.tolerations.key (string)

        Key is the taint key that the toleration applies to. Empty means match all taint keys. If the key is empty, operator must be Exists; this combination means to match all values and all keys.

      • scheduling.tolerations.operator (string)

        Operator represents a key's relationship to the value. Valid operators are Exists and Equal. Defaults to Equal. Exists is equivalent to wildcard for value, so that a pod can tolerate all taints of a particular category.

        Possible enum values:

        • "Equal"
        • "Exists"

      • scheduling.tolerations.value (string)

        Value is the taint value the toleration matches to. If the operator is Exists, the value should be empty, otherwise just a regular string.

      • scheduling.tolerations.effect (string)

        Effect indicates the taint effect to match. Empty means match all taint effects. When specified, allowed values are NoSchedule, PreferNoSchedule and NoExecute.

        Possible enum values:

        • "NoExecute" Evict any already-running pods that do not tolerate the taint. Currently enforced by NodeController.
        • "NoSchedule" Do not allow new pods to schedule onto the node unless they tolerate the taint, but allow all pods submitted to Kubelet without going through the scheduler to start, and allow all already-running pods to continue running. Enforced by the scheduler.
        • "PreferNoSchedule" Like TaintEffectNoSchedule, but the scheduler tries not to schedule new pods onto the node, rather than prohibiting new pods from scheduling onto the node entirely. Enforced by the scheduler.

      • scheduling.tolerations.tolerationSeconds (int64)

        TolerationSeconds represents the period of time the toleration (which must be of effect NoExecute, otherwise this field is ignored) tolerates the taint. By default, it is not set, which means tolerate the taint forever (do not evict). Zero and negative values will be treated as 0 (evict immediately) by the system.

RuntimeClassList

RuntimeClassList is a list of RuntimeClass objects.

Operations

get read the specified RuntimeClass

HTTP Request

GET /apis/node.k8s.io/v1/runtimeclasses/{name}

Parameters

  • name (in path): string, required

    name of the RuntimeClass

  • pretty (in query): string

    pretty

Response

200 (RuntimeClass): OK

401: Unauthorized

list list or watch objects of kind RuntimeClass

HTTP Request

GET /apis/node.k8s.io/v1/runtimeclasses

Parameters

Response

200 (RuntimeClassList): OK

401: Unauthorized

create create a RuntimeClass

HTTP Request

POST /apis/node.k8s.io/v1/runtimeclasses

Parameters

Response

200 (RuntimeClass): OK

201 (RuntimeClass): Created

202 (RuntimeClass): Accepted

401: Unauthorized

update replace the specified RuntimeClass

HTTP Request

PUT /apis/node.k8s.io/v1/runtimeclasses/{name}

Parameters

Response

200 (RuntimeClass): OK

201 (RuntimeClass): Created

401: Unauthorized

patch partially update the specified RuntimeClass

HTTP Request

PATCH /apis/node.k8s.io/v1/runtimeclasses/{name}

Parameters

  • name (in path): string, required

    name of the RuntimeClass

  • body: Patch, required

  • dryRun (in query): string

    dryRun

  • fieldManager (in query): string

    fieldManager

  • fieldValidation (in query): string

    fieldValidation

  • force (in query): boolean

    force

  • pretty (in query): string

    pretty

Response

200 (RuntimeClass): OK

201 (RuntimeClass): Created

401: Unauthorized

delete delete a RuntimeClass

HTTP Request

DELETE /apis/node.k8s.io/v1/runtimeclasses/{name}

Parameters

Response

200 (Status): OK

202 (Status): Accepted

401: Unauthorized

deletecollection delete collection of RuntimeClass

HTTP Request

DELETE /apis/node.k8s.io/v1/runtimeclasses

Parameters

Response

200 (Status): OK

401: Unauthorized

Last modified December 08, 2021 at 9:34 AM PST: Reference docs for kubernetes 1.23 (02445930e5)