* kubeadm: added `--print-join-command` flag for `kubeadm token create`. ([#56185](https://github.com/kubernetes/kubernetes/pull/56185), [@mattmoyer](https://github.com/mattmoyer))
* Implement kubelet side file system resizing. Also implement GCE PD resizing ([#55815](https://github.com/kubernetes/kubernetes/pull/55815), [@gnufied](https://github.com/gnufied))

* implement proposal 34058: hostPath volume type ([#46597](https://github.com/kubernetes/kubernetes/pull/46597), [@dixudx](https://github.com/dixudx))
* HostAlias is now supported for both non-HostNetwork Pods and HostNetwork Pods. ([#50646](https://github.com/kubernetes/kubernetes/pull/50646), [@rickypai](https://github.com/rickypai))

  /** Creates a new byte array for buffering reads or writes. */
  static byte[] createBuffer() {
    return new byte[BUFFER_SIZE];
  }

  /**
   * There are three methods to implement {@link FileChannel#transferTo(long, long,
   * WritableByteChannel)}:
   *
   * <ol>
   *   <li>Use sendfile(2) or equivalent. Requires that both the input channel and the output

    implements Serializable {

  /**
   * Creates a new, empty multiset, sorted according to the elements' natural order. All elements
   * inserted into the multiset must implement the {@code Comparable} interface. Furthermore, all
   * such elements must be <i>mutually comparable</i>: {@code e1.compareTo(e2)} must not throw a

   * Instead, copy the list using {@link ImmutableList#copyOf(Collection)} (for example), then
   * serialize the copy. Other methods similar to this do not implement serialization at all for
   * this reason.
   *
   * <p><b>Java 8+ users:</b> many use cases for this method are better addressed by {@link

		{Association: "Orders", Type: clause.OpDelete},
		{Association: "Profiles", Type: clause.OpUpdate},
	}

	// In practice, each Association would be processed individually
	// since []clause.Association doesn't implement AssociationAssigner directly
	for i, assoc := range associations {
		assigns := assoc.AssociationAssignments()
		if len(assigns) != 1 {
			t.Errorf("Association %d should return one assignment, got %v", i, len(assigns))

* Flex volume plugin is updated to support attach/detach interfaces. It broke backward compatibility. Please update your drivers and implement the new callouts.  ([#41804](https://github.com/kubernetes/kubernetes/pull/41804), [@chakri-nelluri](https://github.com/chakri-nelluri))
* Implement the update feature for DaemonSet. ([#41116](https://github.com/kubernetes/kubernetes/pull/41116), [@lukaszo](https://github.com/lukaszo))

    implements Serializable {

  /**
   * Creates a new, empty multiset, sorted according to the elements' natural order. All elements
   * inserted into the multiset must implement the {@code Comparable} interface. Furthermore, all
   * such elements must be <i>mutually comparable</i>: {@code e1.compareTo(e2)} must not throw a

  Plugins **have to** implement a QueueingHint for Pod/Update event if the rejection from them could be resolved by updating unscheduled Pods themselves.
  Example: suppose you develop a custom plugin that denies Pods that have a `schedulable=false` label. 

        context.resetKeyRotationTracking();

        // Then
        assertFalse(context.needsKeyRotation(), "Should not need rotation after reset");
    }

    @Test
    @DisplayName("Should implement AutoCloseable and securely wipe keys on close")
    void testAutoCloseable() {
        // Given
        byte[] encKey = new byte[16];
        byte[] decKey = new byte[16];
        new SecureRandom().nextBytes(encKey);