### [ChangeLog-1.4.X](docs/changelogs/ChangeLog-1.4.X.md)
### [ChangeLog-1.3.X](docs/changelogs/ChangeLog-1.3.X.md)
### [ChangeLog-1.2.X](docs/changelogs/ChangeLog-1.2.X.md)
### [ChangeLog-1.1.X](docs/changelogs/ChangeLog-1.1.X.md)

in a declaration, but it does not introduce a binding and thus is not declared.
In the package block, the identifier <code>init</code> may only be used for
<a href="#Package_initialization"><code>init</code> function</a> declarations,
and like the blank identifier it does not introduce a new binding.
</p>

<pre class="ebnf">

  // More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/
  // +optional
  optional string namespace = 2;

  // Name of the referent.
  // More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names
  // +optional
  optional string name = 3;

  // UID of the referent.

## Known Issues

### Summary API in kubelet doesn't have accelerator metrics
Currently, cadvisor_stats_provider provides AcceleratorStats but cri_stats_provider does not. As a result, when using cri_stats_provider, kubelet's Summary API does not have accelerator metrics. [#96873](https://github.com/kubernetes/kubernetes/pull/96873).

## Urgent Upgrade Notes 

## Changelog since v1.26.0

## Known Issues

### The PreEnqueue extension point doesn't work for Pods going to activeQ through backoffQ

In v1.26.0, we've found the bug that the PreEnqueue extension point doesn't work for Pods going to activeQ through backoffQ. 
It doesn't affect any of the vanilla Kubernetes behavior, but, may break custom PreEnqueue plugins.

[Extending the Kubernetes API with the aggregation layer](https://kubernetes.io/docs/concepts/api-extension/apiserver-aggregation/), [Configure the aggregation layer](https://kubernetes.io/docs/tasks/access-kubernetes-api/configure-aggregation-layer/), and [Setup an extension API server](https://kubernetes.io/docs/tasks/access-kubernetes-api/setup-extension-api-server/).

* [alpha] Adding admissionregistration API group which enables dynamic registration of initializers and external admission...

### Bug or Regression

- Fixed a bug in the CSI metrics that does not return not supported error when a CSI driver does not support metrics. ([#79851](https://github.com/kubernetes/kubernetes/pull/79851), [@jparklab](https://github.com/jparklab))

 
## Changes by Kind

### Deprecation

- #### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:
  
  <!--
  This section can be blank if this pull request does not require a release note.
  
  When adding links which point to resources within git repositories, like
  KEPs or supporting documentation, please reference a specific commit and avoid

* Various scheduling features have graduated to beta:
  * You can now use [multiple schedulers](https://kubernetes.io/docs/tutorials/clusters/multiple-schedulers/)
  * [Nodes](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#node-affinity-beta-feature) and [pods](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#inter-pod-affinity-and-anti-affinity-beta-feature) now support affinity and anti-affinity