- Fixed admission metrics histogram bucket sizes to cover 25ms to ~2.5 seconds. ([#78608](https://github.com/kubernetes/kubernetes/pull/78608),...

- Use context to check client closed instead of http.CloseNotifier in processing watch request which will reduce 1 goroutine for each request if proto is HTTP/2.x . ([#85408](https://github.com/kubernetes/kubernetes/pull/85408), [@answer1991](https://github.com/answer1991))...

#### Storage

- Signatures on scale client methods have been modified to accept `context.Context` as a first argument. Signatures of Get, Update, and Patch methods have been updated to accept GetOptions, UpdateOptions and PatchOptions respectively. ([#88599](https://github.com/kubernetes/kubernetes/pull/88599), [@julianvmodesto](https://...

* PetSet has been renamed to StatefulSet.
  If you have existing PetSets, **you must perform extra migration steps** both
  before and after upgrading to convert them to StatefulSets. ([docs](http://kubernetes.io/docs/tasks/manage-stateful-set/upgrade-pet-set-to-stateful-set/)) ([#35663](https://github.com/kubernetes/kubernetes/pull/35663), [@janetkuo](https://github.com/janetkuo))

 * `%F0%9F%8D%A9`). This approach works for whitespace characters, control characters, non-ASCII
 * characters, and characters that already have another meaning in a particular context.
 *
 * Percent encoding is used in every URL component except for the hostname. But the set of
 * characters that need to be encoded is different for each component. For example, the path

- Fixed issue where `kubectl-convert` would fail when encountering resources that could not be converted to the specified api version. New behavior is to warn the user of the failed conversions and continue to convert the remaining resources. ([#117002](https://github.com/kubernetes/kubernetes/pull/117002), [@gxwilkerson33](https://github.com/gxwilkerson33))

- kubectl
  - The `kubectl convert` command is deprecated and will be removed in a future release ([#70820](https://github.com/kubernetes/kubernetes/pull/70820), [@seans3](https://github.com/seans3))

    assertThat(url.queryParameter("a")).isEqualTo("!$(),/:;?@[]\\^`{|}~")
  }

  /**
   * When callers parse a URL with query components that aren't encoded, we shouldn't convert them
   * into a canonical form because doing so could be semantically different.
   */
  @Test
  fun queryCharactersNotReencodedWhenParsed() {
    val url = parse("http://host/?a=!$(),/:;?@[]\\^`{|}~")

invalid node names. ([#58502](https://github.com/kubernetes/kubernetes/pull/58502), [@dixudx](https://github.com/dixudx))

* Authentication information for OpenStack cloud provider can now be specified as environment variables. When we convert the OpenStack cloud provider to run in an external process, we can now use the kubernetes Secrets capability to inject the OS_* variables. This way we can specify the cloud configuration as a configmap, and specify secrets for the userid/password...