beta, adding alpha support for a new CSI driver registry as well as for topology, and adding a number of alpha features to support the use of CSI for “local ephemeral volumes” (that is, volumes that exist for the lifecycle of a pod and contain some injected information, like a token or secret).

With Kubernetes v1.12, SIG Storage also introduced alpha support for [volume snapshotting](https://github.com/kubernetes/enhancements/issues/177). This feature introduces the ability to create/delete...

  - Clients should reload the token from disk periodically (once per minute is recommended) to ensure they continue to use a valid token. `k8s.io/client-go` version v11.0.0+ and v0.15.0+ reload tokens automatically.

    * Update debian-iptables image for CVEs.
    * Change chain name to IP-MASQ to be compatible with the pre-injected masquerade rules.

- Kubeadm: add support for dry running `kubeadm...

    * - Update debian-iptables image for CVEs.
    * - Change chain name to IP-MASQ to be compatible with the
    * pre-injected masquerade rules.
* Fix VMWare VM freezing bug by reverting [#51066](https://github.com/kubernetes/kubernetes/pull/51066) ([#67825](https://github.com/kubernetes/kubernetes/pull/67825), [@nikopen](https://github.com/nikopen))

* Fix a bug with binding mount directories and files using flexVolumes ([#49118](https://github.com/kubernetes/kubernetes/pull/49118), [@adelton](https://github.com/adelton))
* PodPreset is not injected if conflict occurs while applying PodPresets to a Pod. ([#47864](https://github.com/kubernetes/kubernetes/pull/47864), [@droot](https://github.com/droot))

    * - Update debian-iptables image for CVEs.
    * - Change chain name to IP-MASQ to be compatible with the
    * pre-injected masquerade rules.

  which the scheduler might miss some updates for the Pods rejected by NodeUnschedulable plugin and put the Pods in the queue for a longer time than needed. ([#127427](https://github.com/kubernetes/kubernetes/pull/127427), [@sanposhiho](https://github.com/sanposhiho)) [SIG Scheduling]
- Fixes the bug in PodTopologySpread that only happens with QHint enabled, 

Kube-apiserver: the `--encryption-provider-config` file is now loaded with strict deserialization, which fails if the config file contains duplicate or unknown fields. This protects against accidentally running with config files that are malformed, mis-indented, or have typos in field names, and getting unexpected behavior. When `--encryption-provider-config-automatic-reload` is used, new encryption config files that contain typos after the kube-apiserver is running are treated as invalid and the last valid...

- Kube-scheduler now retries scheduling Pods rejected by the PodTopologySpread plugin when related Pods are created, deleted, updated,...