### Fluentd
* Migrated fluentd addon to daemon set ([#32088](https://github.com/kubernetes/kubernetes/pull/32088), [@piosz](https://github.com/piosz))

* set AdvancedAuditing feature gate to true by default ([#51943](https://github.com/kubernetes/kubernetes/pull/51943), [@CaoShuFeng](https://github.com/CaoShuFeng))
* Migrate the metrics/v1alpha1 API to metrics/v1beta1.  The HorizontalPodAutoscaler ([#51653](https://github.com/kubernetes/kubernetes/pull/51653), [@DirectXMan12](https://github.com/DirectXMan12))

- Fixed false-positive uncertain volume attachments, which led to unexpected detachment of CSI migrated volumes ([#101737](https://github.com/kubernetes/kubernetes/pull/101737), [@Jiawei0227](https://github.com/Jiawei0227)) [SIG Apps and Storage]

   *
   * <p>Historically, {@code Supplier} instances in this library have implemented this method to
   * recognize certain cases where distinct {@code Supplier} instances would in fact behave
   * identically. However, as code migrates to {@code java.util.function}, that behavior will
   * disappear. It is best not to depend on it.
   */
  @Override
  boolean equals(@Nullable Object object);

#### Renamed Functions

* **Headers.of()**: for symmetry with `listOf()`, `setOf()`, etc., we’ve replaced
  `Headers.of(String...)` with `headersOf(vararg String)`.

#### Extension Functions

We’ve migrated from static functions to extension functions where we think they fit.

| Java                                | Kotlin                          |
| :---------------------------------- | :------------------------------ |

    Preconditions.checkArgument(hitRate >= 0 && hitRate <= 1, "hitRate must be in the range [0,1]");

    enumType =
        Class.forName(EnumsBenchmark.class.getCanonicalName() + "$" + enumSize + "Enum")
            .asSubclass(Enum.class);

    Enum<?>[] allConstants = enumType.getEnumConstants();
    List<String> hits = new ArrayList<>();
    for (int i = 0; i < hitRate * 256 / 3; ++i) {

    * Please convert your `v1alpha1` configuration files to `v1alpha2` using the
    * `kubeadm config migrate` command of kubeadm v1.11.x

- Graduate JobTrackingWithFinalizers to stable.
  Jobs created before the feature was enabled are still tracked without finalizers.
  Users can choose to migrate jobs to tracking with finalizers by adding the annotation batch.kubernetes.io/job-tracking.

   * <p>Historically, {@code Equivalence} instances in this library have implemented this method to
   * recognize certain cases where distinct {@code Equivalence} instances would in fact behave
   * identically. However, as code migrates to {@code java.util.function}, that behavior will
   * disappear. It is best not to depend on it.
   */
  @Override
  public boolean equals(@Nullable Object object) {
    return super.equals(object);
  }

    }.also { expected ->
      when (expected) {
        is SSLException, is TlsFatalAlert -> {}
        else -> throw expected
      }
    }
  }

  // TODO(jwilson): tests below this marker need to be migrated to OkHttp's request/response API.
  @Test
  fun connectViaHttpsWithSSLFallback() {
    platform.assumeNotBouncyCastle()

    server.useHttps(handshakeCertificates.sslSocketFactory())