- Persistent Volumes formatted with the btrfs filesystem will now automatically resize when expanded. ([#99361](https://github.com/kubernetes/kubernetes/pull/99361), [@Novex](https://github.com/Novex)) [SIG Storage]

  // More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#mount-options
  // +optional
  repeated string mountOptions = 7;

  // volumeMode defines if a volume is intended to be used with a formatted filesystem
  // or to remain in raw block state. Value of Filesystem is implied when not included in spec.
  // +optional
  optional string volumeMode = 8;

    <magic priority="50">
      <match value="sNaPpY" type="string" offset="0"/>
    </magic>
    <glob pattern="*.sz"/>
  </mime-type>

  <mime-type type="application/x-sfdu">
    <_comment>Standard Formatted Data Units (SFDUs) data</_comment>
    <sub-class-of type="text/plain"/>
    <glob pattern="*.sfdu"/>
  </mime-type>

  <mime-type type="application/x-spectrum-tzx">
    <_comment>TAP (ZX Spectrum)</_comment>

    * A sample cloud provider configure is: '{"vmType": "vmss", "useInstanceMetadata": true}'.
* Volumes specified in a pod but not used in it are no longer unnecessarily formatted, mounted and reported in `node.status.volumesInUse`. ([#81163](https://github.com/kubernetes/kubernetes/pull/81163), [@jsafrane](https://github.com/jsafrane))

- Kubeadm: fix badly formatted error message for small service CIDRs ([#90411](https://github.com/kubernetes/kubernetes/pull/90411), [@johscheuer](https://github.com/johscheuer)) [SIG Cluster Lifecycle]