need to update to the new API version. ([#58973](https://github.com/kubernetes/kubernetes/pull/58973), [@verb](https://github.com/verb))

* The default Flexvolume plugin directory for COS images on GCE has changed to `/home/kubernetes/flexvolume`, rather than `/etc/srv/kubernetes/kubelet-plugins/volume/exec`. Existing Flexvolume installations in clusters using COS images must be moved to the new directory, and installation processes must be updated with the new path. ([#58171](https://g...

* Fixed a bug in strategic merge patch that caused kubectl apply to error out under some conditions ([#50862](https://github.com/kubernetes/kubernetes/pull/50862), [@guoshimin](https://github.com/guoshimin))
* It is now posible to use flexVolumes to bind mount directories and files. ([#50596](https://github.com/kubernetes/kubernetes/pull/50596), [@adelton](https://github.com/adelton))

* Dynamic Flexvolume plugin discovery. Flexvolume plugins can now be discovered on the fly rather than only at system initialization time. ([#50031](https://github.com/kubernetes/kubernetes/pull/50031), [@verult](https://github.com/verult))

  // +optional
  optional FlockerVolumeSource flocker = 11;

  // flexVolume represents a generic volume resource that is
  // provisioned/attached using an exec based plugin.
  // +optional
  optional FlexPersistentVolumeSource flexVolume = 12;

  // azureFile represents an Azure File Service mount on the host and bind mount to the pod.
  // +optional

* Dynamic Flexvolume plugin discovery. Flexvolume plugins can now be discovered on the fly rather than only at system initialization time. ([#50031](https://github.com/kubernetes/kubernetes/pull/50031), [@verult](https://github.com/verult))

## What's New (Major Themes)

### Deprecation of FlexVolume

FlexVolume is deprecated. Out-of-tree CSI driver is the recommended way to write volume drivers in Kubernetes.
See [this doc](https://github.com/kubernetes/community/blob/master/sig-storage/volume-plugin-faq.md#kubernetes-volume-plugin-faq-for-storage-vendors) for more information.
Maintainers of FlexVolume drivers should implement a CSI driver and move users of FlexVolume to CSI.

* Local persistent volumes and fstype for Azure disk

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

- Port 31337 will be used by fluentd ([#68051](https://github.com/kubernetes/kubernetes/pull/68051), [@Szetty](https://github.com/Szetty))
- Fix flexvolume in containarized kubelets ([#65549](https://github.com/kubernetes/kubernetes/pull/65549), [@gnufied](https://github.com/gnufied))

- Metric names for CSI and flexvolume drivers will include the driver name as well as the CSI plugin name. ([#96474](https://github.com/kubernetes/kubernetes/pull/96474), [@mattcary](https://github.com/mattcary)) [SIG Instrumentation and Storage]

- Change plugin name in fsgroupapplymetrics of csi and flexvolume to distinguish different driver ([#95892](https://github.com/kubernetes/kubernetes/pull/95892), [@JornShen](https://github.com/JornShen)) [SIG Instrumentation, Storage and Testing]