commit
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@ -9,7 +9,7 @@ weight: 20
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<!-- overview -->
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{{< feature-state for_k8s_version="v1.14" state="beta" >}}
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{{< feature-state for_k8s_version="v1.20" state="stable" >}}
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This page describes the RuntimeClass resource and runtime selection mechanism.
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@ -66,7 +66,7 @@ The RuntimeClass resource currently only has 2 significant fields: the RuntimeCl
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(`metadata.name`) and the handler (`handler`). The object definition looks like this:
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```yaml
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apiVersion: node.k8s.io/v1beta1 # RuntimeClass is defined in the node.k8s.io API group
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apiVersion: node.k8s.io/v1 # RuntimeClass is defined in the node.k8s.io API group
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kind: RuntimeClass
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metadata:
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name: myclass # The name the RuntimeClass will be referenced by
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@ -186,4 +186,3 @@ are accounted for in Kubernetes.
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- Read about the [Pod Overhead](/docs/concepts/scheduling-eviction/pod-overhead/) concept
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- [PodOverhead Feature Design](https://github.com/kubernetes/enhancements/blob/master/keps/sig-node/20190226-pod-overhead.md)
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@ -48,7 +48,7 @@ that uses around 120MiB per Pod for the virtual machine and the guest OS:
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```yaml
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---
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kind: RuntimeClass
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apiVersion: node.k8s.io/v1beta1
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apiVersion: node.k8s.io/v1
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metadata:
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name: kata-fc
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handler: kata-fc
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@ -725,10 +725,15 @@ See the [resourceQuota design doc](https://git.k8s.io/community/contributors/des
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### RuntimeClass {#runtimeclass}
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{{< feature-state for_k8s_version="v1.16" state="alpha" >}}
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{{< feature-state for_k8s_version="v1.20" state="stable" >}}
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For [RuntimeClass](/docs/concepts/containers/runtime-class/) definitions which describe an overhead associated with running a pod,
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this admission controller will set the pod.Spec.Overhead field accordingly.
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If you enable the `PodOverhead` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/), and define a RuntimeClass with [Pod overhead](/docs/concepts/scheduling-eviction/pod-overhead/) configured, this admission controller checks incoming
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Pods. When enabled, this admission controller rejects any Pod create requests that have the overhead already set.
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For Pods that have a RuntimeClass is configured and selected in their `.spec`, this admission controller sets `.spec.overhead` in the Pod based on the value defined in the corresponding RuntimeClass.
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{{< note >}}
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The `.spec.overhead` field for Pod and the `.overhead` field for RuntimeClass are both in beta. If you do not enable the `PodOverhead` feature gate, all Pods are treated as if `.spec.overhead` is unset.
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{{< /note >}}
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See also [Pod Overhead](/docs/concepts/scheduling-eviction/pod-overhead/)
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for more information.
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@ -128,7 +128,8 @@ different Kubernetes components.
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| `NonPreemptingPriority` | `true` | Beta | 1.19 | |
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| `PodDisruptionBudget` | `false` | Alpha | 1.3 | 1.4 |
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| `PodDisruptionBudget` | `true` | Beta | 1.5 | |
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| `PodOverhead` | `false` | Alpha | 1.16 | - |
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| `PodOverhead` | `false` | Alpha | 1.16 | 1.17 |
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| `PodOverhead` | `true` | Beta | 1.18 | |
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| `ProcMountType` | `false` | Alpha | 1.12 | |
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| `QOSReserved` | `false` | Alpha | 1.11 | |
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| `RemainingItemCount` | `false` | Alpha | 1.15 | |
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@ -137,8 +138,6 @@ different Kubernetes components.
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| `RotateKubeletServerCertificate` | `false` | Alpha | 1.7 | 1.11 |
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| `RotateKubeletServerCertificate` | `true` | Beta | 1.12 | |
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| `RunAsGroup` | `true` | Beta | 1.14 | |
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| `RuntimeClass` | `false` | Alpha | 1.12 | 1.13 |
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| `RuntimeClass` | `true` | Beta | 1.14 | |
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| `ServiceAppProtocol` | `false` | Alpha | 1.18 | 1.18 |
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| `ServiceAppProtocol` | `true` | Beta | 1.19 | |
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| `ServerSideApply` | `false` | Alpha | 1.14 | 1.15 |
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@ -272,6 +271,9 @@ different Kubernetes components.
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| `ResourceQuotaScopeSelectors` | `true` | GA | 1.17 | - |
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| `RotateKubeletClientCertificate` | `true` | Beta | 1.8 | 1.18 |
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| `RotateKubeletClientCertificate` | `true` | GA | 1.19 | - |
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| `RuntimeClass` | `false` | Alpha | 1.12 | 1.13 |
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| `RuntimeClass` | `true` | Beta | 1.14 | 1.19 |
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| `RuntimeClass` | `true` | GA | 1.20 | - |
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| `ScheduleDaemonSetPods` | `false` | Alpha | 1.11 | 1.11 |
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| `ScheduleDaemonSetPods` | `true` | Beta | 1.12 | 1.16 |
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| `ScheduleDaemonSetPods` | `true` | GA | 1.17 | - |
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@ -177,7 +177,7 @@ This label reflects the Windows major, minor, and build number that need to matc
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1. Save this file to `runtimeClasses.yml`. It includes the appropriate `nodeSelector` for the Windows OS, architecture, and version.
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```yaml
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apiVersion: node.k8s.io/v1beta1
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apiVersion: node.k8s.io/v1
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kind: RuntimeClass
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metadata:
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name: windows-2019
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Reference in New Issue