- The PodSecurityPolicy API is deprecated in 1.21, and will no longer be served starting in 1.25. ([#97171](https://github.com/kubernetes/kubernetes/pull/97171), [@deads2k](https://github.com/deads2k)) [SIG Auth and CLI]

  The `flowcontrol.apiserver.k8s.io/v1beta3` APIs are deprecated and will no longer be served in v1.32. All existing objects are available via the `v1` APIs. Transition clients and manifests to use the `v1` APIs before upgrading to `v1.32`. ([#121089](https://github.com/kubernetes/kubernetes/pull/121089), [@tkashem](https://github.com/tkashem))...

//	anonReq   - unsigned *http.Request to invoke the handler's response for anonymous requests.
//	policyFunc    - function to return bucketPolicy statement which would permit the anonymous request to be served.
//
// The test works in 2 steps, here is the description of the steps.
//
//	STEP 1: Call the handler with the unsigned HTTP request (anonReq), assert for the `ErrAccessDenied` error response.

    assertThat(server.takeRequest().sequenceNumber).isEqualTo(1)
  }

  @Test
  fun streamDiscardingIsTimely() {
    // This response takes at least a full second to serve: 10,000 bytes served 100 bytes at a time.
    server.enqueue(
      MockResponse.Builder()
        .body(Buffer().write(ByteArray(10000)))
        .throttleBody(100, 10, TimeUnit.MILLISECONDS)
        .build(),
    )

- All resources within the `rbac.authorization.k8s.io/v1alpha1` and `rbac.authorization.k8s.io/v1beta1` API groups are deprecated in favor of `rbac.authorization.k8s.io/v1`, and will no longer be served in v1.20. ([#84758](https://github.com/kubernetes/kubernetes/pull/84758), [@liggitt](https://github.com/liggitt))

- The kube-apiserver's Prometheus metrics have been extended with some that describe the costs of handling LIST requests.  They are as follows.
  - *apiserver_cache_list_total*: Counter of LIST requests served from watch cache, broken down by resource_prefix and index_name

  },
  ```
  is a map of domain to list of nameservers for the domain. This is used
  to inject private DNS domains into the kube-dns namespace. In the above
  example, any DNS requests for *.acme.local will be served by the
  nameserver 1.2.3.4.
  ```
  "upstreamNameservers": ["8.8.8.8", "8.8.4.4"]
  ```
  is a list of upstreamNameservers to use, overriding the configuration
  specified in /etc/resolv.conf.

          "vres&cisab,lautriv,??ial.sppa,?s&codeh...

          "vres&cisab,lautriv,??ial.sppa,?s&codeh...

### API Machinery

#### kube-apiserver
* Fixed an issue with `APIService` auto-registration. This issue affected rolling restarts of HA API servers that added or removed API groups being served.([#51921](https://github.com/kubernetes/kubernetes/pull/51921))