*   Support for surfacing volumes as raw block devices added to Kubernetes storage system.
    *   Only Fibre Channel volume plugin supports exposes this functionality, in this release.
*   [alpha] Volume resizing
    *   Added file system resizing for the following volume plugins: GCE PD, Ceph RBD, AWS EBS, OpenStack Cinder
*   [alpha] Topology Aware Volume Scheduling

- A new /resize subresource was added to request pod resource resizing. Update your k8s client code to utilize the /resize subresource for Pod resizing operations. ([#128266](https://github.com/kubernetes/kubernetes/pull/128266), [@AnishShah](https://github.com/AnishShah)) [SIG API Machinery, Apps, Node and Testing]

New alpha features include:
* Online volume resizing will increase the filesystem size of a resized volume without requiring a Pod restart.

* Improved messages user gets during and after volume resizing is done, providing a clear message to the user explaining what to do when resizing is finished. ([#58415](https://github.com/kubernetes/kubernetes/pull/58415), [@gnufied](https://github.com/gnufied))

* [alpha] Volume resizing

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

  * For alpha, this feature increases only the size of the underlying volume. It does not support resizing the file system.

  * For alpha, volume resizing supports only Gluster volumes.

- Enabled completion for aliases defined in `kubectlrc`. ([#131586](https://github.com/kubernetes/kubernetes/pull/131586), [@ardaguclu](https://github.com/ardaguclu))

and enhances scheduling of pods that use CSI volumes with late binding.

[Volume expansion](https://github.com/kubernetes/enhancements/issues/284) adds support
for resizing existing persistent volumes.

### NonPreemptingPriority to Stable

This feature adds [a new option to PriorityClasses](https://github.com/kubernetes/enhancements/issues/902),

- In some cases, a Flex volume resize may leave a PVC with erroneous Resizing condition even after volume has been successfully expanded. Users may choose to delete the condition, but it is not required. ([#71470](https://github.com/kubernetes/kubernetes/issues/71470))

- In-Place Update of Pod Resources (alpha feature) - resizing of pod may race with other pod updates. ([#116826](https://github.com/kubernetes/kubernetes/issues/116826) [SIG Node])

### Other (Cleanup or Flake)

[enable migration of in-tree volume plugins](https://github.com/kubernetes/enhancements/issues/625) to the Container Storage Interface (CSI). SIG Storage worked on bringing CSI to feature parity with in-tree functionality, including functionality like resizing, inline volumes, and more. SIG Storage introduces new alpha functionality in CSI that doesn't exist in the Kubernetes Storage subsystem yet, like volume cloning.

Volume cloning enables users to specify another PVC as a "DataSource" when...