- CRDs: For structural schemas, non-nullable null map fields will now be dropped and defaulted if a default is available. null items in the list will continue being preserved, and fail validation if not nullable. ([#95423](https://github.com/kubernetes/kubernetes/pull/95423), [@apelisse](https://github.com/apelisse)) [SIG API Machinery]

a single one that can proceed is chosen via a uniform pseudo-random selection.
Otherwise, if there is a default case, that case is chosen.
If there is no default case, the "select" statement blocks until
at least one of the communications can proceed.
</li>

<li>
Unless the selected case is the default case, the respective communication
operation is executed.
</li>

<li>

				return true
			case !strings.HasPrefix(string(table.Chains[i].Name), "KUBE-") && strings.HasPrefix(string(table.Chains[j].Name), "KUBE-"):
				// non-KUBE-* goes after KUBE-*
				return false
			default:
				// We have two KUBE-* chains or two non-KUBE-* chains; either
				// way they sort alphabetically
				return table.Chains[i].Name < table.Chains[j].Name
			}
		})
	}

- Graduated ServerSideFieldValidation to `beta`. Schema validation is performed server-side and requests will receive warnings for any invalid/unknown fields by default. ([#110178](https://github.com/kubernetes/kubernetes/pull/110178),...

#### CustomResourceDefinition Defaulting

CustomResourceDefinitions also have new support for defaulting, with defaults specified using the `default` keyword in the OpenAPI validation schema. Defaults are set for unspecified fields in an object sent to the API, and when reading from etcd.

Defaulting will be available as alpha in Kubernetes 1.15 and requires structural schemas.

    // {sub} the subdiagonal alignment. "LEFT" means rows will be padded to the
    // left, "RIGHT" means rows will be padded ot the right.  The default is
    // "RIGHT_LEFT".
    StringRef align = op->getAttrOfType<StringAttr>("align").getValue();
    enum Alignment { kLeft, kRight };

    // default is RIGHT_LEFT
    Alignment superdiagonal_align = kRight;
    Alignment subdiagonal_align = kLeft;

	out.Type = core.LimitType(in.Type)
	out.Max = *(*core.ResourceList)(unsafe.Pointer(&in.Max))
	out.Min = *(*core.ResourceList)(unsafe.Pointer(&in.Min))
	out.Default = *(*core.ResourceList)(unsafe.Pointer(&in.Default))
	out.DefaultRequest = *(*core.ResourceList)(unsafe.Pointer(&in.DefaultRequest))
	out.MaxLimitRequestRatio = *(*core.ResourceList)(unsafe.Pointer(&in.MaxLimitRequestRatio))
	return nil
}

    <sub-class-of type="application/dita+xml"/>
    <_comment>DITA Topic</_comment>
    <root-XML localName="topic"/>
    <root-XML localName="topic" namespaceURI="http://docs.oasis-open.org/namespace"/>
    <!-- Topic is the default, Task and Concept are specialisations -->
    <glob pattern="*.dita"/>
  </mime-type>
  <mime-type type="application/dita+xml;format=task">
    <sub-class-of type="application/dita+xml"/>

- [kubelet] Change default `cpuCFSQuotaPeriod` value with enabled `cpuCFSQuotaPeriod` flag from 100ms to 100µs to match the Linux CFS and k8s defaults. `cpuCFSQuotaPeriod` of 100ms now requires `customCPUCFSQuotaPeriod` flag to be set to work. ([#111520](https://github.com/kubernetes/kubernetes/pull/111520), [@paskal](https://github.com/paskal))...

see [this guide](https://kubernetes.io/blog/2022/03/31/ready-for-dockershim-removal/).

### Beta APIs Off by Default

[New beta APIs will not be enabled in clusters by default](https://github.com/kubernetes/enhancements/issues/3136).
Existing beta APIs and new versions of existing beta APIs, will continue to be enabled by default.

### Signing Release Artifacts