- **Apps**
  - [stable] When replica sets cannot create pods, they will now report detail via the API about the underlying reason ([kubernetes/features#120](https://github.com/kubernetes/enhancements/issues/120))

- Introduction of the `DisruptionTarget` pod condition type. Its `reason` field indicates the reason for pod termination:
  - PreemptionByKubeScheduler (Pod preempted by kube-scheduler)
  - DeletionByTaintManager (Pod deleted by taint manager due to NoExecute taint)

	if !isRequestSignatureV4(r) {
		return auth.Credentials{}, ErrAccessDenied
	}

	s3Err := isReqAuthenticated(ctx, r, globalSite.Region(), serviceSTS)
	if s3Err != ErrNone {
		return auth.Credentials{}, s3Err
	}

	user, _, s3Err := getReqAccessKeyV4(r, globalSite.Region(), serviceSTS)
	if s3Err != ErrNone {
		return auth.Credentials{}, s3Err
	}

          <description>
            Whether to load Maven extensions (such as packaging and type handlers) from
            this plugin. For performance reasons, this should only be enabled when necessary. Note: While the type
            of this field is {@code String} for technical reasons, the semantic type is actually
            {@code Boolean}. Default value is {@code false}.
          </description>
        </field>
        <field>

element1\n * @argument {Element} element2\n * @returns {Element} common offset parent\n */\nexport default function findCommonOffsetParent(element1, element2) {\n  // This check is needed to avoid errors in case one of the elements isn't defined for any reason\n  if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {\n    return document.documentElement;\n  }\n\n  // Here we make sure to give as \"start\" the element that comes first in the DOM\n  const order =\n    element1.compareD...

- If scheduling fails on PreBind or Bind, scheduler will retry the failed pod immediately after backoff time, regardless of the reason for failing. In this case EventsToRegister (QHints) will not be taken into consideration before retry. ([#130189](https://github.com/kubernetes/kubernetes/pull/130189), [@ania-borowiec](https://github.com/ania-borowiec)) [SIG Scheduling]

- Reminder: The labels "failure-domain.beta.kubernetes.io/zone" and "failure-domain.beta.kubernetes.io/region" are deprecated in favor of "topology.kubernetes.io/zone" and "topology.kubernetes.io/region" respectively.  All users of the "failure-domain.beta..." labels should switch to the "topology..." equivalents. ([#96033](https://github.com/kubernetes/kubernetes/pull/96033), [@thockin](https://github.com/thockin))...

### Documentation

- Documented the reason field in CRI API to ensure it equals `OOMKilled` for the containers terminated by OOM killer ([#112977](https://github.com/kubernetes/kubernetes/pull/112977), [@mimowo](https://github.com/mimowo))

### Added metrics

- Added metrics `aggregator_openapi_v2_regeneration_count`, `aggregator_openapi_v2_regeneration_gauge` and `apiextension_openapi_v2_regeneration_count` counting the triggering APIService and CRDs and the reason (add, update, delete) when kube-apiserver regenerates the OpenAPI spec. ([#81786](https://github.com/kubernetes/kubernetes/pull/81786), [@sttts](https://github.com/sttts))

- Append the image pull error for the pods `status.containerStatuses[*].state.waiting.message` when
  in image pull back-off (`reason` is `ImagePullBackOff`) instead of the generic `Back-off pulling image…` message. ([#127918](https://github.com/kubernetes/kubernetes/pull/127918), [@saschagrunert](https://github.com/saschagrunert)) [SIG Node and Testing]