- Fixed a bug where Kubernetes would apply a default StorageClass to a PersistentVolumeClaim,
  even when the deprecated annotation `volume.beta.kubernetes.io/storage-class` was set. ([#116089](https://github.com/kubernetes/kubernetes/pull/116089), [@cvvz](https://github.com/cvvz)) [SIG Apps and Storage]

- `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.
  

### Storage

* Alpha volume provisioning is removed and default storage class should be used instead. ([#44090](https://github.com/kubernetes/kubernetes/pull/44090), [@NickrenREN](https://github.com/NickrenREN))

### Alpha

- You can now create a non-preempting Pod priority (NonPreemptingPriority). If set on a class, the pod will continue to be prioritized above queued pods of a lesser class, but will not preempt running pods. ([#74614](https://github.com/kubernetes/kubernetes/pull/74614), [@denkensk](https://github.com/denkensk))

- Fixed a bug where Kubernetes would apply a default StorageClass to a PersistentVolumeClaim,
  even when the deprecated annotation `volume.beta.kubernetes.io/storage-class` was set. ([#116089](https://github.com/kubernetes/kubernetes/pull/116089), [@cvvz](https://github.com/cvvz)) [SIG Apps and Storage]

- Show a warning when `volume.beta.kubernetes.io/storage-class` annotation is used in pv or pvc ([#117036](https://github.com/kubernetes/kubernetes/pull/117036), [@haoruan](https://github.com/haoruan)) [SIG Storage]

- Add fish shell completion to kubectl. ([#92989](https://github.com/kubernetes/kubernetes/pull/92989), [@WLun001](https://github.com/WLun001))
- Add mechanism to load simple sniffer class into fluentd-elasticsearch image ([#92853](https://github.com/kubernetes/kubernetes/pull/92853), [@cosmo0920](https://github.com/cosmo0920))
- Add support for Portworx plugin to csi-translation-lib. Alpha release
  

- Scheduler ComponentConfig fields are now pointers ([#83619](https://githu...

* Remove CSIPersistentVolume feature gates ([#79309](https://github.com/kubernetes/kubernetes/pull/79309), [@draveness](https://github.com/draveness))
* Init container resource requests now impact pod QoS class ([#75223](https://github.com/kubernetes/kubernetes/pull/75223), [@sjenning](https://github.com/sjenning))

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

 - Azure blob disk feature(`kind`: `Shared`, `Dedicated`) has been deprecated, you should use `kind`: `Managed` in `kubernetes.io/azure-disk` storage class. ([#92905](https://github.com/kubernetes/kubernetes/pull/92905), [@andyzhangx](https://github.com/andyzhangx)) [SIG Cloud Provider and Storage]