// K8s rolling update strategy
	//
	// Deprecated: Marked as deprecated in pkg/apis/istio/v1alpha1/values_types.proto.
	RollingMaxSurge *IntOrString `protobuf:"bytes,21,opt,name=rollingMaxSurge,proto3" json:"rollingMaxSurge,omitempty"`
	// The number of pods that can be unavailable during a rolling update (see
	// `strategy.rollingUpdate.maxUnavailable` here:

- `kube-apiserver` updated:

([#87077](https://github.com/kubernetes/kubernetes/pull/87077), [@soltysh](https://github.com/soltysh)) [SIG Architecture, CLI and Testing]
- The deprecated command `kubectl rolling-update` has been removed ([#88057](https://github.com/kubernetes/kubernetes/pull/88057), [@julianvmodesto](https://github.com/julianvmodesto)) [SIG Architecture, CLI and Testing]

#### client-go:

### DaemonSet
* **[beta]** Introduce the rolling update feature for DaemonSet. See [Performing a Rolling Update on a DaemonSet](https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set/).

### Deployment

* [stable] Expose storage usage metrics

  * The available capacity of a given Persistent Volume (PV) is available by calling the Kubernetes metrics API.

* [stable] Volume plugin metrics

  * Success and latency metrics for all Kubernetes calls are available by calling the Kubernetes metrics API. You can request volume operations, including mount, unmount, attach, detach, provision, and delete.

- Created a new `kubectl rollout restart` command that does a rolling restart of a deployment. ([#76062](https://github.com/kubernetes/kubernetes/pull/76062), [@apelisse](https://github.com/apelisse))

- CoreDNS adds readinessProbe which prevents loadbalancing to unready pods, and also allows rolling updates to work as expected. ([#74137](https://github.com/kubernetes/kubernetes/pull/74137), [@rajansandeep](https://github.com/rajansandeep))

  For more information, see [#56348](https://github.com/kubernetes/kubernetes/issues/56348).

*   API server times out after performing a rolling update of the etcd cluster. This issue will be fixed in a future release.

  For more information, see [#47131](https://github.com/kubernetes/kubernetes/issues/47131)

- Revised the logic for DaemonSet rolling update to exclude nodes if scheduling constraints are not met.

* Fixes an issue with APIService auto-registration affecting rolling HA apiserver restarts that add or remove API groups being served. ([#51921](https://github.com/kubernetes/kubernetes/pull/51921), [@liggitt](https://github.com/liggitt))