- Add a StorageVersionAPI feature gate that makes API server update storageversions before serving certain write requests. 
  This feature allows the storage migrator to manage storage migration for built-in resources. 

### SIG-instrumentation

No feature work, but a large refactoring of metrics-server as well as a number of bug fixes.

### SIG-node

SIG-node graduated the PodShareProcessNamespace feature from alpha to beta.  This feature allows a pod spec to request that all containers in a pod share a common process namespaces.

Two alpha features were also added in this release.

## Known Issues

### `TopologyAwareHints` feature falls back to default behavior

- The `VolumeSnapshotDataSource` feature gate that is GA since v1.20 is unconditionally enabled, and can no longer be specified via the `--feature-gates` argument. ([#101531](https://github.com/kubernetes/kubernetes/pull/101531), [@ialidzhikov](https://github.com/ialidzhikov)) [SIG Storage]

      - [kube-apiserver:](#kube-apiserver-2)
      - [kube-scheduler:](#kube-scheduler-1)
      - [kube-proxy:](#kube-proxy-1)
      - [Features graduated to beta:](#features-graduated-to-beta)
      - [Features graduated to GA:](#features-graduated-to-ga)
    - [Feature](#feature-5)
      - [Metrics:](#metrics)
    - [Other (Bug, Cleanup or Flake)](#other-bug-cleanup-or-flake-1)
  - [Dependencies](#dependencies-19)

- The `CSIMigrationAzureFile` feature gate (for the feature which graduated to GA in v1.26) is now unconditionally enabled and will be removed in v1.28. ([#114953](https://github.com/kubernetes/kubernetes/pull/114953), [@enj](https://github.com/enj))

/kubernetes/pull/60115), [@davidz627](https://github.com/davidz627))

* The LocalStorageCapacityIsolation feature is beta and enabled by default.  The LocalStorageCapacityIsolation feature added a new resource type ResourceEphemeralStorage "ephemeral-storage" so that this resource can be allocated, limited, and consumed as the same way as CPU/memory. All the features related to resource management (resource request/limit, quota, limitrange) are available for local ephemeral storage. This...

in order to bring it to GA in a future release, as well as developing the [Cluster API](https://github.com/kubernetes/kube-deploy/tree/master/cluster-api). For kubeadm, most new features, such as support for CoreDNS, IPv6 and Dynamic Kubelet Configuration, have gone in as alpha features. We expect to graduate these features to beta and beyond in the next release. The initial Cluster API spec and GCE sample implementation were developed from scratch during this cycle, and we look forward to stabilizing...

- Removed the `CronJobTimeZone` feature gate (the feature is stable and always enabled)
  - Removed the `JobMutableNodeSchedulingDirectives` feature gate (the feature is stable and always enabled)

- Features:

  - The following features are now GA, and the associated feature gates are deprecated and will be removed in v1.17:
    - `GCERegionalPersistentDisk` (since 1.15.0)
    - `CustomResourcePublishOpenAPI`
    - `CustomResourceSubresources`
    - `CustomResourceValidation`
    - `CustomResourceWebhookConversion`