## Supported Versions

Information about supported Kubernetes versions can be found on the
[Kubernetes version and version skew support policy] page on the Kubernetes website.

## Reporting a Vulnerability

Instructions for reporting a vulnerability can be found on the
[Kubernetes Security and Disclosure Information] page.

* Marked scheduler's scheduling_duration_seconds Summary metric as deprecated ([#86586](https://github.com/kubernetes/kubernetes/pull/86586), [@xiaoanyunfei](https://github.com/xiaoanyunfei))
* Add instructions about how to bring up e2e test cluster ([#85836](https://github.com/kubernetes/kubernetes/pull/85836), [@YangLu1031](https://github.com/YangLu1031))

- The new `-gce-zones` flag on the `e2e.test` binary instructs tests that check for information about how the cluster interacts with the cloud to limit their queries to the provided zone list. If not specified, the current behavior of asking the cloud provider for all available zones in multi zone clusters is...

  - The deprecated `--etcd-quorum-read` flag has been removed. Quorum reads are...

#### Rkt runtime Known Issues

- A detailed list of known issues can be found [here](https://github.com/kubernetes/kubernetes.github.io/blob/release-1.3/docs/getting-started-guides/rkt/notes.md)

*More Instructions coming soon*

## Provider-specific Notes

* AWS
  * Support for ap-northeast-2 region (Seoul)
  * Allow cross-region image pulling with ECR
  * More reliable kube-up/kube-down

  * Plugins

      * Introduces the ability to extend kubectl by adding third-party plugins. Developer preview, please refer to the documentation for instructions about how to use it. ([#37499](https://github.com/kubernetes/kubernetes/pull/37499), [@fabianofranz](https://github.com/fabianofranz))

### Ephemeral Containers Graduate to Stable

  - `http_404_request_duration_ms` (the amount of time the server took to respond in ms)

  Also includes percentile groupings. The directory for the default 404 handler includes instructions on how to enable prometheus for monitoring and setting alerts.
  ([#79106](https://github.com/kubernetes/kubernetes/pull/79106), [@vbannai](https://github.com/vbannai))

### Instrumentation

- The `client.authentication.k8s.io/v1alpha1` ExecCredential has been removed. If you are using a client-go credential plugin that relies on the v1alpha1 API please contact the distributor of your plugin for instructions on how to migrate to the v1 API. ([#108616](https://github.com/kubernetes/kubernetes/pull/108616), [@margocrawf](https://github.com/margocrawf))

### Documentation

- Updated the instructions for deploying the sample app. ([#82785](https://github.com/kubernetes/kubernetes/pull/82785), [@ashish-billore](https://github.com/ashish-billore)) [SIG API Machinery]

### Failing Test