You can read more in the official blog post [Kubernetes Release Cadence Change: Here’s What You Need To Know](https://blog.k8s.io/2021/07/20/new-kubernetes-release-cadence/).

- When updating a CRD, per-expression cost limit check are now skipped for `x-kubernetes-validations` rules of versions that are not mutated. ([#121460](https://github.com/kubernetes/kubernetes/pull/121460), [@jiahuif](https://github.com/jiahuif))

	for i := 1; i < len(s); i++ {
		if !reflect.DeepEqual(s[i], s[0]) {
			return errSRIAMConfigMismatch(peers[0].Name, peers[i].Name, s[0], s[i])
		}
	}

	return nil
}

// Netperf for site-replication net perf
func (c *SiteReplicationSys) Netperf(ctx context.Context, duration time.Duration) (results madmin.SiteNetPerfResult, err error) {
	infos, err := globalSiteReplicationSys.GetClusterInfo(ctx)
	if err != nil {

- Improved `kubectl` display of invalid request errors returned by the API server. ([#112150](https://gi...

  - Clone `kubernetes/kubernetes` in `update-vendor.sh` shallowly, instead of fetching all revisions
  - Speed up binpacking by reducing the number of PreFilter calls (call once per pod instead of #pods*#nodes times)
  - Speed up finding unneeded nodes by 5x+ in very large clusters by reducing the number of PreFilter calls
  - Expose `--max-nodes-total` as a metric

options to override the ones defined in [Defaults](#defaults)\n   * @return {Object} instance - The generated Popper.js instance\n   */\n  constructor(reference, popper, options = {}) {\n    // make update() debounced, so that it only runs at most once-per-tick\n    this.update = debounce(this.update.bind(this));\n\n    // with {} we create a new object with the options inside it\n    this.options = { ...Popper.Defaults, ...options };\n\n    // init state\n    this.state = {\n      isDestroyed: false,\n...

* azure: update disk lock logic per vm during attach/detach to allow concurrent updates for different nodes. ([#85115](https://github.com/kubernetes/kubernetes/pull/85115), [@aramase](https://github.com/aramase))

new Map())\n    }\n\n    const instanceMap = elementMap.get(element)\n\n    // make it clear we only want one instance per element\n    // can be removed later when multiple key/instances are fine to be used\n    if (!instanceMap.has(key) && instanceMap.size !== 0) {\n      // eslint-disable-next-line no-console\n      console.error(`Bootstrap doesn't allow more than one instance per element. Bound instance: ${Array.from(instanceMap.keys())[0]}.`)\n      return\n    }\n\n    instanceMap.set(key, instance)\n...

    /** The key of the message: OCaml */
    public static final String LABELS_facet_filetype_ocaml = "{labels.facet_filetype_ocaml}";

    /** The key of the message: Perl */
    public static final String LABELS_facet_filetype_perl = "{labels.facet_filetype_perl}";

    /** The key of the message: PHP */
    public static final String LABELS_facet_filetype_php = "{labels.facet_filetype_php}";

- Added a new command line argument `--interactive` to kubectl. The new command line argument lets a user confirm deletion requests per resource interactively. ([#114530](https://github.com/kubernetes/kubernetes/pull/114530), [@ardaguclu](https://github.com/ardaguclu)) [SIG CLI and Testing]
- Added a new feature gate, `SchedulerQueueingHints` (enabled by default).