* Add a NodeCondition "NetworkUnavailable" to prevent scheduling onto a node until the routes have been created  ([#26415](https://github.com/kubernetes/kubernetes/pull/26415), [@wojtek-t](https://github.com/wojtek-t))
* Add garbage collector into kube-controller-manager ([#26341](https://github.com/kubernetes/kubernetes/pull/26341), [@caesarxuchao](https://github.com/caesarxuchao))

 *
 * <p>If {@link #weakKeys weakKeys}, {@link #weakValues weakValues}, or {@link #softValues
 * softValues} are requested, it is possible for a key or value present in the cache to be reclaimed
 * by the garbage collector. Entries with reclaimed keys or values may be removed from the cache on
 * each cache modification, on occasional cache accesses, or on calls to {@link Cache#cleanUp}; such

* The garbage collector now supports CustomResourceDefinitions and APIServices. ([#65918](https://github.com/kubernetes/kubernetes/pull/65918), [@nikhita](https://github.com/nikhita))

      - [GCE](#gce)
      - [GKE](#gke)
      - [vSphere](#vsphere)
    - [Federation](#federation-2)
      - [kubefed](#kubefed)
      - [Other Notable Changes](#other-notable-changes-13)
    - [Garbage Collector](#garbage-collector)
    - [kubeadm](#kubeadm-2)
    - [kubectl](#kubectl-1)
      - [New Commands](#new-commands)
      - [Create subcommands](#create-subcommands)

 *
 * <p>If {@link #weakKeys weakKeys}, {@link #weakValues weakValues}, or {@link #softValues
 * softValues} are requested, it is possible for a key or value present in the cache to be reclaimed
 * by the garbage collector. Entries with reclaimed keys or values may be removed from the cache on
 * each cache modification, on occasional cache accesses, or on calls to {@link Cache#cleanUp}; such

* fix data loss issue if using existing azure disk with partitions in disk mount  ([#63270](https://github.com/kubernetes/kubernetes/pull/63270), [@andyzhangx](https://github.com/andyzhangx))
* The garbage collector now supports CustomResourceDefinitions and APIServices. ([#65916](https://github.com/kubernetes/kubernetes/pull/65916), [@xmudrii](https://github.com/xmudrii))

    void testNewInstance() {
        ProblemCollector collector1 = ProblemCollectorFactory.newInstance(null);

        Problem problem = new DefaultProblem("MESSAGE1", null, null, -1, -1, null);
        ProblemCollector collector2 = ProblemCollectorFactory.newInstance(Collections.singletonList(problem));

        assertNotSame(collector1, collector2);
        assertEquals(0, collector1.getProblems().size());

		for _, erObj := range z.sets {
			resultIndex++
			wg.Add(1)
			go func(i int, erObj *erasureObjects) {
				updates := make(chan dataUsageCache, 1)
				defer xioutil.SafeClose(updates)
				// Start update collector.
				go func() {
					defer wg.Done()
					for info := range updates {
						mu.Lock()
						results[i] = info
						mu.Unlock()
					}
				}()
				// Start scanner. Blocks until done.

* Finalizers are now honored on custom resources, and on other resources even when garbage collection is disabled via the apiserver flag `--enable-garbage-collector=false` ([#51469](https://github.com/kubernetes/kubernetes/pull/51469), [@ironcladlou](https://github.com/ironcladlou))

- Fixed a regression in default configurations, which enabled PodDisruptionConditions by default,