### Bug or Regression

- Add `/sys/devices/virtual/powercap` to default masked paths. It avoids the potential security risk that the ability to read these files may offer a power-based sidechannel attack against any workloads running on the same kernel. ([#125970](https://github.com/kubernetes/kubernetes/pull/125970), [@carlory](https://github.com/carlory)) [SIG Node]

A security issue was discovered in Kubernetes that could allow  Windows workloads to run as `ContainerAdministrator` even when those workloads set the `runAsNonRoot` option to `true `.

This issue has been rated low and assigned CVE-2021-25749

**Am I vulnerable?**

All Kubernetes clusters with following versions, running Windows workloads with `runAsNonRoot` are impacted

**Affected Versions**:

alpha) for allocating dynamic resources to Pods.

  if and only if classic DRA was enabled in a cluster, remove all workloads (pods, app deployments, etc. ) which depend on classic DRA and make sure that all PodSchedulingContext resources are gone before upgrading. PodSchedulingContext resources cannot be removed through the apiserver after an upgrade and workloads would not work properly. ([#128003](https://github.com/kubernetes/kubernetes/pull/128003), [@pohly](https://github.com/pohly))...

    - [Deprecation warnings](#deprecation-warnings)
    - [Avoiding permanent beta](#avoiding-permanent-beta)
    - [Expanded CLI support for debugging workloads and nodes](#expanded-cli-support-for-debugging-workloads-and-nodes)
    - [Structured logging](#structured-logging)
    - [EndpointSlices are now enabled by default](#endpointslices-are-now-enabled-by-default)

## Changelog since v1.17.15

## Changes by Kind

### Feature

- Add a new flag to set priority for the kubelet on Windows nodes so that workloads cannot overwhelm the node there by disrupting kubelet process. ([#96159](https://github.com/kubernetes/kubernetes/pull/96159), [@ravisantoshgudimetla](https://github.com/ravisantoshgudimetla)) [SIG Node]

### Bug or Regression

alpha feature enables a node to surface multiple runtime options to support a variety of workload types.  Examples include native linux containers, and “sandboxed” containers that isolate the container from the host kernel.

The CustomCFSQuotaPeriod alpha feature enables node administrators to change the default period used to enforce CFS quota on a node.  This can improve performance for some workloads that experience latency while using CFS quota with the default measurement period.  Finally,...

## Known Issues

There are a number of known issues that have been found and are being worked on.
Please be aware of them as you test your workloads.

* PVC Volume not detached if pod deleted via namespace deletion ([29051](https://github.com/kubernetes/kubernetes/issues/29051))

複数の**コンテナ**があり、おそらくそれぞれが**単一のプロセス**を実行している場合（**Kubernetes**クラスタなど）、レプリケートされたワーカーコンテナを実行する**前に**、単一のコンテナで**事前のステップ**の作業を行う**別のコンテナ**を持ちたいと思うでしょう。

/// info

もしKubernetesを使用している場合, これはおそらく<a href="https://kubernetes.io/docs/concepts/workloads/pods/init-containers/" class="external-link" target="_blank">Init コンテナ</a>でしょう。

///

ユースケースが事前のステップを**並列で複数回**実行するのに問題がない場合（例：データベースの準備チェック）、メインプロセスを開始する前に、それらのステップを各コンテナに入れることが可能です。

### 単一コンテナ

 - [Action Required] CSI drivers that call IsLikelyNotMountPoint...

- Added a new alpha API: ClusterTrustBundle (`certificates.k8s.io/v1alpha1`).
  A ClusterTrustBundle may be used to distribute [X.509](https://www.itu.int/rec/T-REC-X.509) trust anchors to workloads within the cluster. ([#113218](https://github.com/kubernetes/kubernetes/pull/113218), [@ahmedtd](https://github.com/ahmedtd)) [SIG API Machinery, Auth and Testing]