* The previous version, <code>apiVersion: extensions/v1beta1</code>, is still supported.  Even if you roll back to 1.1, the objects created using
the new apiVersion will still be accessible, using the old version.   You can
continue to use your existing JSON and YAML files until you are ready to switch
to <code>batch/v1</code>.  We may remove support for Jobs with  <code>apiVersion: extensions/v1beta1 </code>in 1.3 or 1.4.

    - `apps/v1beta1=true`
    - `apps/v1beta2=true`
    - `extensions/v1beta1/daemonsets=true,extensions/v1beta1/deployments=true,extensions/v1beta1/replicasets=true,extensions/v1beta1/networkpolicies=true,extensions/v1beta1/podsecuritypolicies=true`

* For Deployment, ReplicaSet, and DaemonSet, selectors are now immutable when updating via the new `apps/v1beta2` API. For backward compatibility, selectors can still be changed when updating via `apps/v1beta1` or `extensions/v1beta1`. ([#50719](https://github.com/kubernetes/kubernetes/pull/50719), [@crimsonfaith91](https://github.com/crimsonfaith91))

  - PodSecurityPolicy resources will no longer be served from `extensions/v1beta1` in v1.16. Migrate to the `policy/v1beta1` API, available since v1.10. Existing persisted data can be retrieved via the `policy/v1beta1` API.

  - When registering with a 1.17+ API server, a CustomResourceDefinition conversion webhook can now request that only `v1` ConversionReview requests be sent to them. Previously, conversion webhooks were required to support receiving `v1beta1` ConversionReview requests as well for compatibility with API servers <= 1.15. ([#8...

* Introduce apps/v1beta1.Deployments resource with modified defaults compared to extensions/v1beta1.Deployments. ([#39683](https://github.com/kubernetes/kubernetes/pull/39683), [@soltysh](https://github.com/soltysh))
* Introduce new generator for apps/v1beta1 deployments ([#42362](https://github.com/kubernetes/kubernetes/pull/42362), [@soltysh](https://github.com/soltysh))

* For Deployment, ReplicaSet, and DaemonSet, selectors are now immutable when updating via the new `apps/v1beta2` API. For backward compatibility, selectors can still be changed when updating via `apps/v1beta1` or `extensions/v1beta1`. ([#50719](https://github.com/kubernetes/kubernetes/pull/50719), [@crimsonfaith91](https://github.com/crimsonfaith91))

  - All resources under `apps/v1beta1` and `apps/v1beta2` - use `apps/v1` instead
  - `daemonsets`, `deployments`, `replicasets` resources under `extensions/v1beta1` - use `apps/v1` instead
  - `networkpolicies` resources under `extensions/v1beta1` - use `networking.k8s.io/v1` instead

- The audit.k8s.io api group has been upgraded from v1beta1 to v1. ([#65891](https://github.com/kubernetes/kubernetes/pull/65891), [@CaoShuFeng](https://github.com/CaoShuFeng)) Courtesy of SIG API Machinery

  - PodSecurityPolicy resources will no longer be served from `extensions/v1beta1` in v1.16. Migrate to the `policy/v1beta1` API, available since v1.10. Existing persisted data can be retrieved via the `policy/v1beta1` API.