- The PodShareProcessNamespace feature to configure PID namespace sharing within a pod has been promoted to beta. ([#66507](https://github.com/kubernetes/kubernetes/pull/66507), [@verb](https://github.com/verb))

## API Changes

A Service `ClusterIP` can be assigned:

* dynamically, which means the cluster will automatically pick a free IP within the configured Service IP range.
* statically, which means the user will set one IP within the configured Service IP range.

Service `ClusterIP` are unique, hence, trying to create a Service with a `ClusterIP` that has already been allocated will return an error.

- Fixed detection of non-root image user ID.([#78261](https://github.com/kubernetes/kubernetes/pull/78261), [@tallclair](https://github.com/tallclair))
- Signal handling is now initialized within hyperkube commands that require it, such as apiserver and kubelet. ([#76659](https://github.com/kubernetes/kubernetes/pull/76659), [@S-Chan](https://github.com/S-Chan))

### Ephemeral Containers Graduate to Stable

  - Debian-base to v1.9.0
  - Debian-iptables to v1.6.7 (#106148, @cpanato) [SIG Release and Testing]

### Failing Test

- Fixes hostpath storage e2e tests within SELinux enabled env (#105788, @Elbehery) [SIG Testing]

### Bug or Regression

### Avoiding permanent beta

From Kubernetes 1.20 onwards, SIG Architecture will implement a new policy to transition all REST APIs out of beta within nine months. The idea behind the new policy is to avoid features staying in beta for a long time. Once a new API enters beta, it will have nine months to either:

 - reach GA, and deprecate the beta, or

  
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