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.

   * ...
   * Collection<V> values = multimap.get(key); // Needn't be in synchronized block
   * ...
   * synchronized (multimap) { // Synchronizing on multimap, not values!
   *   Iterator<V> i = values.iterator(); // Must be in synchronized block
   *   while (i.hasNext()) {
   *     foo(i.next());
   *   }
   * }
   * }
   *

   * ...
   * Collection<V> values = multimap.get(key); // Needn't be in synchronized block
   * ...
   * synchronized (multimap) { // Synchronizing on multimap, not values!
   *   Iterator<V> i = values.iterator(); // Must be in synchronized block
   *   while (i.hasNext()) {
   *     foo(i.next());
   *   }
   * }
   * }
   *

        * Supplemental Groups
        * FSGroup - a special supplemental group
        * SELinux options
     * If a pod defines an FSGroup, that Pod’s system (emptyDir, secret, configMap,
etc) volumes and block-device volumes will be owned by the FSGroup, and each
container in the pod will run with the FSGroup as a supplemental group
  * Volumes that support SELinux labelling are now automatically relabeled with the

  these are intended for use in documentation, so please make it clear what
  you have done, and only do this where the benefit clearly outweighs the
  decrease in consistency.
* Note that Javadoc and block comments i.e. `/* ... */` are not formatted,
  but line comments i.e `// ...` are.
* Negative boolean expressions must use the form `foo == false` instead of
  `!foo` for better readability of the code. This is enforced via

$body.hasClass(CLASS_NAME_CONTROL_SIDEBAR_OPEN) ||\n        $body.hasClass(CLASS_NAME_CONTROL_SIDEBAR_SLIDE)\n\n    if (shouldNotHideAll) {\n      $(SELECTOR_CONTROL_SIDEBAR).not(this._config.target).hide()\n      $(this._config.target).css('display', 'block')\n    } else {\n      $(SELECTOR_CONTROL_SIDEBAR).hide()\n    }\n\n    this._fixHeight()\n    this._fixScrollHeight()\n\n    $(window).resize(() => {\n      this._fixHeight()\n      this._fixScrollHeight()\n    })\n\n    $(window).scroll(() => {\n...

                    "Response not awaited. There's a high chance that the "
                    "application code is raising an exception and a dependency with yield "
                    "has a block with a bare except, or a block with except Exception, "
                    "and is not raising the exception again. Read more about it in the "

	erasureDisks := er.getDisks()
	ridx := rand.Intn(len(erasureDisks))

	z.serverPools[0].erasureDisksMu.Lock()
	er.getDisks = func() []StorageAPI {
		erasureDisks[ridx] = newNaughtyDisk(erasureDisks[ridx], nil, errFaultyDisk)
		return erasureDisks
	}
	z.serverPools[0].erasureDisksMu.Unlock()

	uploadIDs = append(uploadIDs, res.UploadID)

	// Create multipart parts.

zt({isVisible:Boolean(this._config.backdrop),isAnimated:this._isAnimated()})}_initializeFocusTrap(){return new Rt({trapElement:this._element})}_showElement(t){document.body.contains(this._element)||document.body.append(this._element),this._element.style.display="block",this._element.removeAttribute("aria-hidden"),this._element.setAttribute("aria-modal",!0),this._element.setAttribute("role","dialog"),this._element.scrollTop=0;const e=K.findOne(".modal-body",this._dialog);e&&(e.scrollTop=0),g(this._element),this....

- 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/kubern...