* Fixed a bug in the CSI metrics that does not return not supported error when a CSI driver does not support metrics. ([#79851](https://github.com/kubernetes/kubernetes/pull/79851), [@jparklab](https://github.com/jparklab))
* Fix a bug in server printer that could cause kube-apiserver to panic. ([#79349](https://github.com/kubernetes/kubernetes/pull/79349), [@roycaihw](https://github.com/roycaihw))

			b.WriteString(KvSpaceSeparator)
			b.WriteString(ep.Name)
			b.WriteString(EnvSeparator)
			b.WriteString(ep.Value)
			b.WriteString(KvNewline)
		}
	}
}

// WriteTo writes the string representation of the configuration to the given
// builder. When off is true, adds a comment character before the config system
// output. It also ignores values when empty and deprecated.

Hier sind einige Beispiele, wann das sinnvoll sein könnte:

#### Eine einfache Anwendung

* remove iSCSI volume storage cleartext secrets in logs ([#81215](https://github.com/kubernetes/kubernetes/pull/81215), [@zouyee](https://github.com/zouyee))
* Fix a bug in server printer that could cause kube-apiserver to panic. ([#79349](https://github.com/kubernetes/kubernetes/pull/79349), [@roycaihw](https://github.com/roycaihw))

- The in-tree cloud provider for vSphere has been deprecated and removed. Users are advised to utilize the external cloud provider and CSI driver available at https://github.com/kubernetes/cloud-provider-vsphere. ([#122937](https://...

### Promoted CRD Validation Expression Language to Beta

 * entries may be counted in {@link Cache#size}, but will never be visible to read or write
 * operations.
 *
 * <p>Certain cache configurations will result in the accrual of periodic maintenance tasks which
 * will be performed during write operations, or during occasional read operations in the absence of
 * writes. The {@link Cache#cleanUp} method of the returned cache will also perform maintenance, but

* Fix a scalability issue where high rates of event writes degraded etcd performance. ([#64539](https://github.com/kubernetes/kubernetes/pull/64539), [@ccding](https://github.com/ccding))

    caused by looking up CA certificates. This is now fixed.


## Version 3.1.0

_2016-02-06_

 *  New: WebSockets now defer some writes. This should improve performance for
    some applications.
 *  New: Override `equals()` and `hashCode()` in our new cookie class. This
    class now defines equality by value rather than by reference.

- Fixed migration of in-tree vSphere volumes to the CSI driver. ([#122341](https://github.com/kubernetes/kubernetes/pull/122341), [@jsafrane](https://github.com/jsafrane)) [SIG Storage]