* and CPU usage of the Kube controller manager.
* add  `kubectl replace --raw` and `kubectl delete --raw` to have parity with create and get ([#79724](https://github.com/kubernetes/kubernetes/pull/79724), [@deads2k](https://github.com/deads2k))

- vSphereVolume implements Raw Block Volume Support  ([#68761](https://github.com/kubernetes/kubernetes/pull/68761), [@fanzhangio](https://github.com/fanzhangio))

*   [alpha] Container Storage Interface
    *   New CSIVolumeSource enables Kubernetes to use external CSI drivers to provision, attach, and mount volumes.
*   [alpha] Raw block volumes
    *   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

obtained from concatenating a sequence of characters. There are two forms:
raw string literals and interpreted string literals.
</p>

<p>
Raw string literals are character sequences between back quotes, as in
<code>`foo`</code>.  Within the quotes, any character may appear except
back quote. The value of a raw string literal is the
string composed of the uninterpreted (implicitly UTF-8-encoded) characters

- For raw block CSI volumes on Kubernetes, kubelet was incorrectly calling CSI `NodeStageVolume` for every single "map" (i.e. raw block "mount") operation for a volume already attached to the node. This change modified that behavior to ensure it is only called once per volume per node. ([#112403](https://github.com/k...

#### Storage
- A node that uses a CSI raw block volume needs to be drained before kubelet can be upgraded to 1.17. ([#74026](https://github.com/kubernetes/kubernetes/pull/74026), [@mkimuram](https://github.com/mkimuram))

#### Windows

SIG Storage made a lot of progress in the 1.18 release.
In particular, the following storage features are moving to GA in Kubernetes 1.18:
- Raw Block Support: Allow volumes to be surfaced as block devices inside containers instead of just mounted filesystems.
- Volume Cloning: Duplicate a PersistentVolumeClaim and underlying storage volume using the Kubernetes API via CSI.

- For raw block CSI volumes on Kubernetes, kubelet was incorrectly calling CSI NodeStageVolume for every single "map" (i.e. raw block "mount") operation for a volume already attached to the node. This PR ensures it is only called once per volume per node. ([#112403](https://github.com/kubernetes/kubernetes/pull/112403),...

### Bug or Regression

- Allow deletion of pods that use raw block volumes on node reboot ([#122211](https://github.com/kubernetes/kubernetes/pull/122211), [@gnufied](https://github.com/gnufied)) [SIG Node and Storage]

- `Statefulset` respected `minReadySeconds`. ([#130909](https://github.com/kubernetes/kubernetes/pull/130909), [@Edwinhr716](https://github.com/Edwinhr716))
- `kubectl create|delete|get|replace --raw` commands now honored the server root paths specified in the kubeconfig file. ([#131165](https://github.com/kubernetes/kubernetes/pull/131165), [@liggitt](https://github.com/liggitt))

### Other (Cleanup or Flake)