#### Storage

* [stable] Mount options

  * The ability to specify mount options for volumes is moved from beta to stable.

  * A new `MountOptions` field in the `PersistentVolume` spec is available to specify mount options. This field replaces an annotation.

  * A new `MountOptions` field in the `StorageClass` spec allows configuration of mount options for dynamically provisioned volumes.

- AzureFile and CephFS use the new Mount library that prevents logging of sensitive mount options. ([#88684](https://github.com/kubernetes/kubernetes/pull/88684), [@saad-ali](https://github.com/saad-ali)) [SIG Storage]

* fix race condition issue for smb mount on windows ([#75371](https://github.com/kubernetes/kubernetes/pull/75371), [@andyzhangx](https://github.com/andyzhangx))

- Following metrics from kube-controller-manager are now marked as with the ALPHA stability level:
  `storage_count_attachable_volumes_in_use`
  `attachdetach_controller_total_volumes`
  `pv_collector_bound_pv_count`
  `pv_collector_unbound_pv_count`
  `pv_collector_bound_pvc_count`
  `pv_collector_unbound_pvc_count`
  ([#84896](https://github.com/kubernetes/kubernetes/pull/84896), [@RainbowMango](https://github.com/RainbowMango))

- Etcd: Update to version 3.5.10 ([#121805](https://github.com/kubernetes/kubernetes/pull/121805), [@mzaian](https://github.com/mzaian)) [SIG API Machinery, Cloud Provider, Cluster Lifecycle, Etcd and Testing]
- Fix: Mount point may become local without calling NodePublishVolume after node rebooting. ([#119923](https://github.com/kubernetes/kubernetes/pull/119923), [@cvvz](https://github.com/cvvz)) [SIG Node and Storage]

MountPropagation feature is now beta. As a consequence, all volume mounts in containers are now `rslave` on Linux by default. To make this default work in all Linux environments the entire mount tree should be marked as shareable, e.g. via `mount --make-rshared /`. All Linux distributions that use systemd already have the root directory mounted as rshared and hence they need not do anything. In Linux environments without systemd we recommend running `mount --make-rshared /` during boot before docker is started,...

    *   Dynamic provisioning is not supported with this feature yet.
*   [alpha] Containerized mount utilities
    *   Allow mount utilities, used to mount volumes, to run inside a container instead of on the host.
*   Bug Fixes

* Fixes spurious 0-length API responses. ([#72856](https://github.com/kubernetes/kubernetes/pull/72856), [@liggitt](https://github.com/liggitt))

- Fixes a rare race condition handling requests that timeout ([#107460](https://github.com/kubernetes/kubernetes/pull/107460), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]
- Mount-utils: Detect potential stale file handle ([#107040](https://github.com/kubernetes/kubernetes/pull/107040), [@andyzhangx](https://github.com/andyzhangx)) [SIG Storage]

### Other (Cleanup or Flake)

* Allow mounts to run in parallel for non-attachable volumes ([#28939](https://github.com/kubernetes/kubernetes/pull/28939), [@saad-ali](https://github.com/saad-ali))
* add enhanced volume and mount logging for block devices ([#24797](https://github.com/kubernetes/kubernetes/pull/24797), [@screeley44](https://github.com/screeley44))