// RuntimeClass.
message Scheduling {
  // 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.
  // +optional
  // +mapType=atomic

}

// Scheduling specifies the scheduling constraints for nodes supporting a
// RuntimeClass.
message Scheduling {
  // 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

// RuntimeClass.
message Scheduling {
  // 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.
  // +optional
  // +mapType=atomic

  repeated string allowedProcMountTypes = 21;

  // runtimeClass is the strategy that will dictate the allowable RuntimeClasses for a pod.
  // If this field is omitted, the pod's runtimeClassName field is unrestricted.
  // Enforcement of this field depends on the RuntimeClass feature gate being enabled.
  // +optional
  optional RuntimeClassStrategyOptions runtimeClass = 24;
}

  // 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

- 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))

- 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.