- Kubenet: added HostPort IPv6 support.  HostPortManager: operates only with one IP family, failing if receives port mapping entries with different IP families.  HostPortSyncer: operates only with one IP family, skipping portmap entries with different IP families ([#80854](https://github.com/kubernetes/kubernetes/pull/80854), [@aojea](https://github.com/aojea))

  Kubeadm now seamlessly migrates the CoreDNS Configuration when upgrading CoreDNS. ([#78033](https://github.com/kubernetes/kubernetes/pull/78033), [@rajansandeep](https://github.com/rajansandeep))

  - The replacement is running a cloud-specific controller-manager (often referred to as `cloud-controller-manager`) with the `PersistentVolumeLabel` controller enabled. This new controller loop operates as the `PersistentVolumeLabel` admission controller did in previous versions.

    *  - vSphere cloud provider (VCP) uses OS hostname and not vSphere Inventory VM Name.
    *    That means, now  VCP can handle cases where user changes VM inventory name.
    * - VCP can handle cases where VM migrates to other ESXi cluster or datacenter or vCenter.
    * The only requirement is the shared storage. VCP needs shared storage on all Node VMs.

* kubeadm: add optional self-hosted deployment for apiserver, controller-manager and scheduler. ([#40075](https://github.com/kubernetes/kubernetes/pull/40075), [@pires](https://github.com/pires))
* kubelet tears down pod volumes on pod termination rather than pod deletion ([#37228](https://github.com/kubernetes/kubernetes/pull/37228), [@sjenning](https://github.com/sjenning))

- Fixed the occasional double-counting of the `job_finished_total` metric. ([#112948](https://github.com/kubernetes/kubernetes/pull/112948), [@mimowo](https://github.com/mimowo))

    } else if (align == "LEFT_LEFT") {
      superdiagonal_align = kLeft;
      subdiagonal_align = kLeft;
    } else {
      return failure();  // unsupported alignment
    }

    // MatrixDiagPart operates on a matrix of shape [I, J, ..., L, M, N], and
    // will extract the diagonal(s) out of [M, N], for all [I, J, ..., L].
    if (!input_type || !input_type.hasStaticShape()) return failure();

- Faster mount detection for linux kernel 5.10+ using openat2 speeding up pod churn rates. On Kernel versions less 5.10, it will fallback to using the original way of detecting mount points i.e by parsing /proc/mounts. ([#109217](https://github.com/kubernetes/kubernetes/pull/109217), [@manugupt1](https://github.com/manugupt1))

	add := func(pkg, fn string, b intrinsicBuilder, archs ...*sys.Arch) {
		for _, a := range archs {
			intrinsics[intrinsicKey{a, pkg, fn}] = b
		}
	}
	// addF does the same as add but operates on architecture families.
	addF := func(pkg, fn string, b intrinsicBuilder, archFamilies ...sys.ArchFamily) {
		m := 0
		for _, f := range archFamilies {
			if f >= 32 {
				panic("too many architecture families")

* Pass cluster_location argument to Heapster ([#65176](https://github.com/kubernetes/kubernetes/pull/65176), [@kawych](https://github.com/kawych))
* Fix a scalability issue where high rates of event writes degraded etcd performance. ([#64539](https://github.com/kubernetes/kubernetes/pull/64539), [@ccding](https://github.com/ccding))