// This field will be autopopulated at admission time by the RuntimeClass admission controller. If
  // the RuntimeClass admission controller is enabled, overhead must not be set in Pod create requests.
  // The RuntimeClass admission controller will reject Pod create requests which have the overhead already

- The RuntimeClass API has been added. This feature is in alpha, and the RuntimeClass feature gate must be enabled in order to use it. The RuntimeClass API resource defines different classes of runtimes that may be used to run containers in the cluster. Pods can select a RuntimeClass to use via the RuntimeClassName field. ([#67737](https://github.com/kubernetes/kubernetes/pull/67737), [@tallc...

- Changed CRI pod log directory from `/var/log/pods/UID` to `/var/log/pods/NAMESPACE_NAME_UID`. ([#74441](https://github.com/kubernetes/kubernetes/pull/74441), [@Random-Liu](https://github.com/Random-Liu))
- `RuntimeClass` has been promoted to beta, and is enabled by default. ([#75003](https://github.com/kubernetes/kubernetes/pull/75003), [@tallclair](https://github.com/tallclair))

### Alpha

- Added RuntimeClass restrictions and defaulting to PodSecurityPolicy. ([#73795](https://github.com/kubernetes/kubernetes/pull/73795), [@tallclair](https://github.com/tallclair))

    - [<code>TokenRequest</code> / <code>TokenRequestProjection</code> graduates to General Availability](#tokenrequest--tokenrequestprojection-graduates-to-general-availability)
    - [RuntimeClass feature graduates to General Availability.](#runtimeclass-feature-graduates-to-general-availability)
    - [Cloud Controller Manager now exclusively shipped by Cloud Provider](#cloud-controller-manager-now-exclusively-shipped-by-cloud-provider)

- Do not detach volume if mount in progress ([#71145](https://github.com/kubernetes/kubernetes/pull/71145), [@gnufied](https://github.com/gnufied))
- The runtimeHandler field on the RuntimeClass resource now accepts the empty string. ([#69550](https://github.com/kubernetes/kubernetes/pull/69550), [@tallclair](https://github.com/tallclair))

#### Other deprecations:
- The k8s.io/node-api component is no longer updated. Instead, use the RuntimeClass types located within k8s.io/api, and the generated clients located within k8s.io/client-go ([#87503](https://github.com/kubernetes/kubernetes/pull/87503), [@liggitt](https://github.com/liggitt)) [SIG Node and Release]

- The `node.k8s.io/v1alpha1` RuntimeClass API is no longer served. Use the `node.k8s.io/v1` API version, available since v1.20 ([#103061](https://github.com/kubernetes/kubernetes/pull/103061), [@SergeyKanzhelev](https://github.com/SergeyKanzhelev))

- The Pods and Pod controllers that are exempted from the PodSecurity admission process are now marked with the `pod-security.kubernetes.io/exempt: user/namespace/runtimeClass` annotation, based on what caused the exemption.
  
  The enforcement level that allowed or denied a Pod during PodSecurity admission is now marked by the `pod-security.kubernetes.io/enforce-policy` annotation.