* [fluentd-gcp addon] Bump prometheus-to-sd to v0.5.0 to pick up security fixes.
    * [metatada-proxy addon] Bump prometheus-to-sd v0.5.0 to pick up security fixes.
* Node-Problem-Detector configuration is now decoupled from the Kubernetes release on GKE/GCE. ([#73288](https://github.com/kubernetes/kubernetes/pull/73288), [@wangzhen127](https://github.com/wangzhen127))

### Apps

- Users can now specify a DataSource/Kind of type `PersistentVolumeClaim` in their PVC spec.  This can then be detected by the external csi-provisioner and plugins if capable. ([#76913](https://github.com/kubernetes/kubernetes/pull/76913), [@j-griffith](https://github.com/j-griffith))

- On compatible systems, a mounter's Unmount implementation is changed to not return an error when the specified target can be detected as not a mount point. On Linux, the behavior of detecting a mount point depends on `umount` command is validated when the mounter is created. Additionally, mount point checks will be skipped in CleanupMountPoint/CleanupMountWithForce if the mounter's...

- Kube-proxy, will restart in case it detects that the Node assigned pod.Spec.PodCIDRs have changed ([#113258](https://github.com/kubernetes/kubernetes/pull/113258), [@code-elinka](https://github.com/code-elinka)) [SIG Network]

	xlVersionMajor = 1

	// Non breaking changes.
	// Bumping this is informational, but should be done
	// if any change is made to the data stored, bumping this
	// will allow to detect the exact version later.
	xlVersionMinor = 3
)

func init() {
	binary.LittleEndian.PutUint16(xlVersionCurrent[0:2], xlVersionMajor)
	binary.LittleEndian.PutUint16(xlVersionCurrent[2:4], xlVersionMinor)
}

* Stop kubelet logging a warning to override hostname if there's no change detected. ([#71560](https://github.com/kubernetes/kubernetes/pull/71560), [@KashifSaadat](https://github.com/KashifSaadat))

	if rcfg != nil {
		for _, rule := range rcfg.Rules {
			if rule.Status != sreplication.Status(replication.Disabled) {
				tgt, isValidARN := arnTgtMap[rule.Destination.ARN] // detect stale ARN in replication config
				_, epFound := epDeplIDMap[tgt.URL().String()]      // detect end point change at site level
				if !isValidARN || !epFound {
					replMismatch = true
					break
				}
			}
		}
	}

Promoted the `ServerSideFieldValidation` feature gate to beta (on by default). This allows optionally triggering schema validation on the API server that errors when unknown fields are detected. This allows the removal of client-side validation from kubectl while maintaining the same core functionality of erroring out on requests that contain unknown or invalid fields.


###  Introduced KMS v2

  1. If you experienced problems with Services not syncing to iptables correctly, you can disable the feature by passing `--feature-gates=MinimizeIPTablesRestore=false` to kube-proxy (and file a bug if this fixes it). (This might also be detected by seeing the value of kube-proxy's `sync_proxy_rules_iptables_partial_restore_failures_total` metric rising.)

    * Logging Agent Improvements
    * Bump logging agent version to 0.2-1.5.33-1-k8s-1.
    * Appropriately set log severity for k8s_container.
    * Fix detect exceptions plugin to analyze message field instead of log field.
    * Fix detect exceptions plugin to analyze streams based on local resource id.
    * Disable the metadata agent for monitored resource construction in logging.