- `diskformat` storage class parameter for in-tree vSphere volume plugin is deprecated as of v1.21 release. Please consider updating storageclass and remove `diskformat` parameter. vSphere CSI Driver does not support diskformat storageclass parameter.
  
  vSphere releases less than 67u3 are deprecated as of v1.21. Please consider upgrading vSphere to 67u3 or above. vSphere CSI Driver requires minimum vSphere 67u3.

* [stable] You can now specify the World Wide Identifier (WWID) for the volume identifier in the Fibre Channel volume plugin.

* [beta] Reclaim policy in StorageClass

  * You can now configure the reclaim policy in StorageClass, instead of defaulting to `delete` for dynamically provisioned volumes.

* [alpha] Volume resizing

  * You can now increase the size of a volume by calling the Kubernetes API.

* fix formatAndMount func issue on Windows ([#63248](https://github.com/kubernetes/kubernetes/pull/63248), [@andyzhangx](https://github.com/andyzhangx))
* Fixes an issue where Portworx PVCs remain in pending state when created using a StorageClass with empty parameters ([#64895](https://github.com/kubernetes/kubernetes/pull/64895), [@harsh-px](https://github.com/harsh-px))

    * [fluentd-gcp addon] Bump prometheus-to-sd to v0.5.0 to pick up security fixes.
    * [metatada-proxy addon] Bump prometheus-to-sd v0.5.0 to pick up security fixes.
* Fixed parsing of fsType in AWS StorageClass parameters ([#75944](https://github.com/kubernetes/kubernetes/pull/75944), [@jsafrane](https://github.com/jsafrane))

  much later). ([#122815](https://github.com/kubernetes/kubernetes/pull/122815), [@wedaly](https://github.com/wedaly)) [SIG Network]
- If a pvc has an empty storageClassName, persistentvolume controller won't try to assign a default StorageClass ([#122704](https://github.com/kubernetes/kubernetes/pull/122704), [@carlory](https://github.com/carlory)) [SIG Apps and Storage]

* Reload systemd config files before starting kubelet. ([#65702](https://github.com/kubernetes/kubernetes/pull/65702), [@mborsz](https://github.com/mborsz))
* Fixes an issue where Portworx PVCs remain in pending state when created using a StorageClass with empty parameters ([#64895](https://github.com/kubernetes/kubernetes/pull/64895), [@harsh-px](https://github.com/harsh-px))

* PodSecurityPolicy now supports restricting hostPath volume mounts to be readOnly and under specific path prefixes ([#58647](https://github.com/kubernetes/kubernetes/pull/58647), [@jhorwit2](https://github.com/jhorwit2))
* Added StorageClass API to restrict topologies of dynamically provisioned volumes. ([#63233](https://github.com/kubernetes/kubernetes/pull/63233), [@lichuqiang](https://github.com/lichuqiang))

- Fixed provisioning of Cinder volumes migrated to CSI when StorageClass with AllowedTopologies was used. ([#98311](https://github.com/kubernetes/kubernetes/pull/98311), [@jsafrane](https://github.com/jsafrane)) [SIG Storage]

* Fixes a NPD bug on GCI, so that it disables glog writing to files for log-counter ([#76211](https://github.com/kubernetes/kubernetes/pull/76211), [@wangzhen127](https://github.com/wangzhen127))
* Fixed parsing of fsType in AWS StorageClass parameters ([#75943](https://github.com/kubernetes/kubernetes/pull/75943), [@jsafrane](https://github.com/jsafrane))

## Changelog since v1.17.13

## Changes by Kind

### Bug or Regression

- An issues preventing volume expand controller to annotate the PVC with `volume.kubernetes.io/storage-resizer` when the PVC StorageClass is already updated to the out-of-tree provisioner is now fixed. ([#94489](https://github.com/kubernetes/kubernetes/pull/94489), [@ialidzhikov](https://github.com/ialidzhikov)) [SIG API Machinery, Apps and Storage]