* Added block volume support to Cinder volume plugin. ([#64879](https://github.com/kubernetes/kubernetes/pull/64879), [@bertinatto](https://github.com/bertinatto))
* Provided API support for external CSI storage drivers to support block volumes. ([#64723](https://github.com/kubernetes/kubernetes/pull/64723), [@vladimirvivien](https://github.com/vladimirvivien))

  })
  @IgnoreJRERequirement // No more dangerous than wherever the caller got the Duration from
  private static long toNanosSaturated(Duration duration) {
    // Using a try/catch seems lazy, but the catch block will rarely get invoked (except for
    // durations longer than approximately +/- 292 years).
    try {
      return duration.toNanos();
    } catch (ArithmeticException tooBig) {

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.

			userDefined[minIOErasureUpgraded] = strconv.Itoa(parityOrig) + "->" + strconv.Itoa(parityDrives)
		}
	}

	dataDrives := len(onlineDisks) - parityDrives

	// we now know the number of blocks this object needs for data and parity.
	// establish the writeQuorum using this data
	writeQuorum := dataDrives
	if dataDrives == parityDrives {
		writeQuorum++
	}

	// Initialize parts metadata

through the use of the <code>Once</code> type.
Multiple threads can execute <code>once.Do(f)</code> for a particular <code>f</code>,
but only one will run <code>f()</code>, and the other calls block
until <code>f()</code> has returned.
</p>

<p class="rule">
The completion of a single call of <code>f()</code> from <code>once.Do(f)</code>
is synchronized before the return of any call of <code>once.Do(f)</code>.

pkg encoding/pem, func Decode([]uint8) (*Block, []uint8)
pkg encoding/pem, func Encode(io.Writer, *Block) error
pkg encoding/pem, func EncodeToMemory(*Block) []uint8
pkg encoding/pem, type Block struct
pkg encoding/pem, type Block struct, Bytes []uint8
pkg encoding/pem, type Block struct, Headers map[string]string
pkg encoding/pem, type Block struct, Type string
pkg encoding/xml, const Header ideal-string

([#63176](https://github.com/kubernetes/kubernetes/pull/63176), [@bswartz](https://github.com/bswartz))

- Switch to VM Update call in attach/detach disk operation, original CreateOrUpdate call may lead to orphaned VMs or blocked resources ([#81208](https://github.com/kubernetes/kubernetes/pull/81208), [@andyzhangx](https://github.com/andyzhangx))

   ([#123738](https://github.com/kubernetes/kubernetes/pull/123738), [@kannon92](https://github.com/kannon92))
- Promoted `AdmissionWebhookMatchConditions` to GA. The feature is now stable, and the feature gate is now locked to default.
   ([#123560](https://github.com/kubernetes/kubernetes/pull/123560), [@ivelichkovich](https://github.com/ivelichkovich))

1) Alpha for AWS ALB (Application Load Balancer) integration to Kubernetes Ingress resources.
2) Alpha for CSI specification 0.3 integration to AWS EBS (Elastic Block Store)