- [Changelog since v1.22.1](#changelog-since-v1221)
  - [Important Security Information](#important-security-information-2)
    - [CVE-2021-25741: Symlink Exchange Can Allow Host Filesystem Access](#cve-2021-25741-symlink-exchange-can-allow-host-filesystem-access)
  - [Changes by Kind](#changes-by-kind-14)
    - [Feature](#feature-7)
    - [Bug or Regression](#bug-or-regression-14)
  - [Dependencies](#dependencies-15)

*   Added pod-level local ephemeral storage metric to the Summary API. Pod-level ephemeral storage reports the total filesystem usage for the containers and emptyDir volumes in the measured Pod. ([#55447](https://github.com/kubernetes/kubernetes/pull/55447),[ @jingxu97](https://github.com/jingxu97))

#### **Hardware Accelerators**

* Rename ScheduledJobs to CronJobs. ([#36021](https://github.com/kubernetes/kubernetes/pull/36021), [@soltysh](https://github.com/soltysh))
* Read the federation controller manager kubeconfig from a filesystem path ([#30601](https://github.com/kubernetes/kubernetes/pull/30601), [@madhusudancs](https://github.com/madhusudancs))

  - More information [here](https://vishh.github.io/docs/user-guide/gpus/).
* A pod’s Quality of Service Class is now available in its Status.
* Upgrade cAdvisor library to v0.25.0. Notable changes include,
  - Container filesystem usage tracking disabled for device mapper due to excessive
    IOPS.
  - Ignore `.mount` cgroups, fixing disappearing stats.
* A new field `terminationMessagePolicy` has been added to containers that allows

    </magic>
    <glob pattern="a_*.txt"/>
  </mime-type>

  <mime-type type="application/x-iso9660-image">
    <acronym>ISO</acronym>
    <_comment>ISO 9660 CD-ROM filesystem data</_comment>
    <magic priority="50">
      <match value="CD001" type="string" offset="32769"/>
      <match value="CD001" type="string" offset="34817"/>
      <match value="CD001" type="string" offset="36865"/>

ConfigMap rendering [issue](https://github.com/kubernetes/kubernetes/issues/112081) was found in the 1.25.0 release. When ConfigMaps get updated within the API, they do not get rendered to the resulting pod's filesystem by the Kubelet. The feature has been [reverted to alpha](https://github.com/kubernetes/kubernetes/pull/112078) in the 1.25.1 release.

## Urgent Upgrade Notes

### (No, really, you MUST read this before you upgrade)

pkg net/http, type File interface, Seek(int64, int) (int64, error)
pkg net/http, type File interface, Stat() (os.FileInfo, error)
pkg net/http, type FileSystem interface { Open }
pkg net/http, type FileSystem interface, Open(string) (File, error)
pkg net/http, type Flusher interface { Flush }
pkg net/http, type Flusher interface, Flush()
pkg net/http, type Handler interface { ServeHTTP }

pkg io/fs, var ErrNotExist error
pkg io/fs, var ErrPermission error
pkg io/fs, var SkipDir error
pkg log, func Default() *Logger
pkg net, var ErrClosed error
pkg net/http, func FS(fs.FS) FileSystem
pkg net/http, type Transport struct, GetProxyConnectHeader func(context.Context, *url.URL, string) (Header, error)
pkg os, const ModeAppend fs.FileMode
pkg os, const ModeCharDevice fs.FileMode

has now graduated to Beta.
This allows the kubelet to dynamically retrieve credentials for a container image registry
using exec plugins, rather than storing credentials on the node's filesystem.

### Contextual Logging in Alpha

Kubernetes 1.24 has introduced [contextual logging](https://github.com/kubernetes/enhancements/issues/3077)