The `DeclarativeValidationTakeover` feature gate remains disabled by default.  While disabled, validation errors produced by hand written validation are always return to the caller.  To switch to declarative validation is primary source of errors for migrated fields, enable this feature gate. ([#130728](https://github.com/kubernetes/kubernetes/pull/130728),...

- Fixed a bug in the JSON frame reader that could cause it to retain a reference to the underlying array of the byte slice passed to read. ([#123620](https://github.com/kubernetes/kubernetes/pull/123620), [@benluddy](https://github.com/benluddy))

access to the Endpoints API. For new Kubernetes 1.22 clusters, the `edit` and `admin` roles will no longer include that access in newly created Kubernetes 1.22 clusters. This will have no affect on existing clusters upgrading to Kubernetes 1.22. To retain write access to Endpoints in the aggregated `edit` and `admin` roles for newly created 1.22 clusters, refer to https://github.com/kubernetes/website/pull/29025. ([#103704](https://github.com/kubernetes/kubernetes/pull/103704), [@robscott](https:/...

alpha `optionalOldSelf` API field in CustomResourceDefinition validation rules, which should only be allowed to be set when the CRDValidationRatcheting feature gate is enabled. Existing CustomResourceDefinition objects which have the field set will retain it on update, but new CustomResourceDefinition objects will not be permitted to set the field while the CRDValidationRatcheting feature gate is disabled. ([#122343](https://github.com/kubernetes/kubernetes/pull/122343), [@jpbetz](https://github.com/jpbetz))...

- [alpha: kubectl apply --prune --applyset] Enabled certain custom resources (CRs) to be used as `ApplySet` parent objects. To enable this for a given CR, apply the label `applyset.kubernetes.io/is-parent-type: true` to the CustomResourceDefinition (CRD) that defines it. ([#116353](https://github.com/kubernetes/kubernetes/pull/116353), [@KnVerey](https://github.com/KnVerey))
- `Kubelet` no longer creates certain legacy iptables rules by default.

- kube-apiserver: a new `--requestheader-uid-headers` flag allows configuring request header authentication to obtain the authenticating user's UID from the specified headers. The suggested value for the...

- `Kubectl set resources` will no longer return an error if passed an empty change for a resource. `kubectl set subject` will no longer return an error if passed an empty change for a resource. ([#85490](https://github.com/kubernetes/kubernetes/pull/85490), [@sallyom](https://github.com/sallyom)) [SIG CLI]

- Fixed a startup probe race condition that caused main containers to remain stuck in "Initializing" state when sidecar containers with startup probes had failed initially but succeeded on restart in pods with `restartPolicy=Never`. ([#133072](https://github.com/kubernetes/kubernetes/pull/133072), [@AadiDev005](https://gi...

a,t,s={};for(t in e)h(e,t)&&(a=N(t))&&(s[a]=e[t]);return s}var R={};function C(e,a){R[e]=a}function I(e){return e%4==0&&e%100!=0||e%400==0}function U(e){return e<0?Math.ceil(e)||0:Math.floor(e)}function G(e){var a=+e,t=0;return 0!=a&&isFinite(a)&&(t=U(a)),t}function V(a,t){return function(e){return null!=e?(K(this,a,e),M.updateOffset(this,t),this):B(this,a)}}function B(e,a){return e.isValid()?e._d["get"+(e._isUTC?"UTC":"")+a]():NaN}function K(e,a,t){e.isValid()&&!isNaN(t)&&("FullYear"===a&&I(e.year())&&1===e....

- metrics-server remains unchanged at v0.3.1 since Kubernetes 1.12 ([#68746](https://github.com/kubernetes/kubernetes/pull/68746))
- GLBC remains unchanged at v1.2.3 since Kubernetes 1.12 ([#66793](https://github.com/kubernetes/kubernetes/pull/66793))
- Ingress-gce remains unchanged at v1.2.3 since Kubernetes 1.12 ([#66793](https://github.com/kubernetes/kubernetes/pull/66793))