- Kube-scheduler deprecated all non-csi volumelimit plugins and removed those from defaults plugins. 
  - AzureDiskLimits
  - CinderLimits
  - EBSLimits
  - GCEPDLimits
  
  The NodeVolumeLimits plugin can handle the same functionality as the above plugins since the above volume types are migrated to CSI.

- Fixed a bug which the scheduler didn't correctly tell plugins Node deletion.

   ([#122341](https://github.com/kubernetes/kubernetes/pull/122341), [@jsafrane](https://github.com/jsafrane))
- Fixed a regression since `1.24` in the scheduling framework when overriding MultiPoint plugins (e.g. default plugins). The incorrect loop logic might have led to a plugin being loaded multiple times, consequently preventing any Pod from being scheduled, which was unexpected.

Improvements in Windows Server version 1803 also bring new storage functionality to Kubernetes v1.11, including:

* Volume mounts for ConfigMap and Secret
* Flexvolume plugins for SMB and iSCSI storage are also available out-of-tree at [Microsoft/K8s-Storage-Plugins](https://github.com/Microsoft/K8s-Storage-Plugins)

## Known Issues

### External credential providers

Kubernetes client [credential plugins](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#client-go-credential-plugins) have been in beta since 1.11, a few eons ago. With the release of Kubernetes 1.22, this feature set graduates to stable. The GA feature set includes improved support for plugins that provide interactive login flows.

### SIG Openstack

- Migrate `pkg/scheduler/framework/plugins/interpodaffinity/filtering.go`,`pkg/scheduler/framework/plugins/podtopologyspread/filtering.go`, `pkg/scheduler/framework/plugins/volumezone/volume_zone.go` to structured logging (#105931, @mengjiao-liu) [SIG Instrumentation and Scheduling]

- Fixed a regression since 1.24 in the scheduling framework when overriding MultiPoint plugins (e.g. default plugins).

- Fixes a problem with 63-second or 1-second connection delays with some VXLAN-based
  network plugins which was first widely noticed in 1.16 (though some users saw it
  earlier than that, possibly only with specific network plugins). If you were previously
  using ethtool to disable checksum offload on your primary network interface, you should

  * Plugins

      * Introduces the ability to extend kubectl by adding third-party plugins. Developer preview, please refer to the documentation for instructions about how to use it. ([#37499](https://github.com/kubernetes/kubernetes/pull/37499), [@fabianofranz](https://github.com/fabianofranz))