A <code>nil</code> channel is never ready for communication.
</p>

<p>
A channel may be closed with the built-in function
<a href="#Close"><code>close</code></a>.
The multi-valued assignment form of the
<a href="#Receive_operator">receive operator</a>
reports whether a received value was sent before
the channel was closed.
</p>

<p>
A single channel may be used in

  // first client attaches to stdin, and then remains open and accepts data until the client disconnects,
  // at which time stdin is closed and remains closed until the container is restarted. If this
  // flag is false, a container processes that reads from stdin will never receive an EOF.
  // Default is false
  // +optional
  optional bool stdinOnce = 17;

- Apiserver add a new flag --goaway-chance which is the fraction of requests that will be closed gracefully(GOAWAY) to prevent HTTP/2 clients from getting stuck on a single apiserver. 
  After the connection closed(received GOAWAY), the client's other in-flight requests won't be affected, and the client will reconnect. 

- Azure: check the nil error before invoke err.Error() ([#96623](https://github.com/kubernetes/kubernetes/pull/96623), [@nilo19](https://github.com/nilo19)) [SIG Cloud Provider]

- The cloud config for Azure cloud provider can now be initialized from Kubernetes secret azure-cloud-provider in kube-system namespace
    - the secret is a serialized version of `azure.json` file with key cloud-config. And the secret name is azure-cloud-provider.

### Cloud Provider

- Fixed a bug that caused PV allocation on non-English vSphere installations to fail  ([#73115](https://github.com/kubernetes/kubernetes/pull/73115), [@alvaroaleman](https://github.com/alvaroaleman))

### Cluster Lifecycle

* vSphere cloud provider: Remove the dependency of login information on worker nodes for vsphere cloud provider. ([#43545](https://github.com/kubernetes/kubernetes/pull/43545), [@luomiao](https://github.com/luomiao))

[registry.k8s.io/conformance:v1.25.16](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/conformance) | [amd64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/conformance-amd64), [arm](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/conformance-arm), [arm64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/conformance-arm64), [ppc64le](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/conformance-ppc64le),...

- The in-tree cloud provider for vSphere has been deprecated and removed. Users are advised to utilize the external cloud provider and CSI driver available at https://github.com/kubernetes/cloud-provider-vsphere. ([#122937](https://github.com/kubernetes/kubernetes/pull/122937), [@dims]...

* Deprecate auto detecting cloud providers in kubelet. Auto detecting cloud providers go against the initiative for out-of-tree cloud providers as we'll now depend on cAdvisor integrations with cloud providers instead of the core repo. In the near future, `--cloud-provider` for kubelet will either be an empty string or `external`.  ([#51312](https://github.com/kubernetes/kubernetes/pull/51312),...