* Resolves spurious rollouts of workload controllers when upgrading the API server due to incorrect defaulting of an alpha procMount field in pods ([#78882](https://github.com/kubernetes/kubernetes/pull/78882), [@liggitt](https://github.com/liggitt))

* kubeadm: clean up exited containers and network checkpoints ([#43836](https://github.com/kubernetes/kubernetes/pull/43836), [@yujuhong](https://github.com/yujuhong))

### kubeadm
* A new label and taint is used for marking the master. The label is `node-role.kubernetes.io/master=""` and the taint has the effect `NoSchedule`. Tolerate the `node-role.kubernetes.io/master="":NoSchedule` taint to schedule a workload on the master (a networking DaemonSet for example).
* The kubelet API is now secured, only cluster admins are allowed to access it.
* Insecure access to the API Server over `localhost:8080` is now disabled.

- Set CSIMigrationvSphere feature gates to beta.
  Users should enable CSIMigration + CSIMigrationvSphere features and install the vSphere CSI Driver (https://github.com/kubernetes-sigs/vsphere-csi-driver) to move workload from the in-tree vSphere plugin "kubernetes.io/vsphere-volume" to vSphere CSI Driver.
  

- Non-graceful node shutdown handling is enabled for stateful workload failovers ([#108486](https://github.com/kubernetes/kubernetes/pull/108486), [@sonasingh46](https://github.com/sonasingh46))