- Added support to restore a volume from a volume snapshot data source.  ([#67087](https://github.com/kubernetes/kubernetes/pull/67087), [@xing-yang](https://github.com/xing-yang))

- Added reason to metric `attachdetach_controller_forced_detaches` in the attach detach controller. ([#119185](https://github.com/kubernetes/kubernetes/pull/119185), [@xing-yang](https://github.com/xing-yang))
- Added support for pod `hostNetwork` field selector ([#110477](https://github.com/kubernetes/kubernetes/pull/110477), [@halfcrazy](https://github.com/halfcrazy)) [SIG Apps and Node]

connection health check is enabled by default in all Kubernetes clients to fix persistently broken connections (https://github.com/kubernetes/client-go/issues/374). If needed, users can tune the feature via the HTTP2_READ_IDLE_TIMEOUT_SECONDS and HTTP2_PING_TIMEOUT_SECONDS environment variables. The feature is disabled if HTTP2_READ_IDLE_TIMEOUT_SECONDS is set to 0. ([#100376](https://github.com/kubernetes/kubernetes/pull/100376), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, CLI, Cloud...

* Enables VolumeSnapshotDataSource feature gate and promotes volume snapshot APIs to beta. ([#80058](https://github.com/kubernetes/kubernetes/pull/80058), [@xing-yang](https://github.com/xing-yang))
* Added appProtocol field to EndpointSlice Port ([#83815](https://github.com/kubernetes/kubernetes/pull/83815), [@howardjohn](https://github.com/howardjohn))

* Returns error if NodeGetInfo fails. ([#68979](https://github.com/kubernetes/kubernetes/pull/68979), [@xing-yang](https://github.com/xing-yang))
* Pod disruption budgets shouldn't be checked for terminal pods while evicting ([#68892](https://github.com/kubernetes/kubernetes/pull/68892), [@ravisantoshgudimetla](https://github.com/ravisantoshgudimetla))

- VolumeSnapshotDataSource moves to GA in 1.20 release ([#95282](https://github.com/kubernetes/kubernetes/pull/95282), [@xing-yang](https://github.com/xing-yang)) [SIG Apps]
- WinOverlay feature graduated to beta ([#94807](https://github.com/kubernetes/kubernetes/pull/94807), [@ksubrmnn](https://github.com/ksubrmnn)) [SIG Windows]

### Feature

- HTTP/2 connection health check is enabled by default in all Kubernetes clients. The feature should work out-of-the-box. If needed, users can tune the feature via the HTTP2_READ_IDLE_TIMEOUT_SECONDS and HTTP2_PING_TIMEOUT_SECONDS environment variables. The feature is disabled if HTTP2_READ_IDLE_TIMEOUT_SECONDS is set to 0. ([#96778](https://github.com/kubernetes/kubernetes/pull/96778), [@caesarxuchao](https://github.com/caesarxuchao)) [SIG API Machinery, CLI,...

* Fixes API compatibility issue with empty lists incorrectly returning a null `items` field instead of an empty array. ([#39834](https://github.com/kubernetes/kubernetes/pull/39834), [@liggitt](https://github.com/liggitt))
* Re-add /healthz/ping handler in genericapiserver ([#38603](https://github.com/kubernetes/kubernetes/pull/38603), [@sttts](https://github.com/sttts))

- '`NodeOutOfServiceVolumeDetach` is now beta.'
   ([#113511](https://github.com/kubernetes/kubernetes/pull/113511), [@xing-yang](https://github.com/xing-yang))
- '`RetroactiveDefaultStorageClass` feature is now beta.'
   ([#113329](https://github.com/kubernetes/kubernetes/pull/113329), [@RomanBednar](https://github.com/RomanBednar))