- Improved Federation Support
  - New command: `kubefed`
  - DaemonSets
  - Deployments
  - ConfigMaps
- Simplified Cluster Deployment
  - Improvements to `kubeadm`
  - HA Setup for Master
- Node Robustness and Extensibility
  - Windows Server Container support
  - CRI for pluggable container runtimes
  - `kubelet` API supports authentication and authorization

## Features

- Removed note that `hostAliases` are not supported on hostNetwork Pods from the PodSpec API. The feature has been supported since v1.8. ([#122422](https://github.com/kubernetes/kubernetes/pull/122422), [@neolit123](https://github.com/neolit123))

* Turned-off etcd listening on public ports as potentially insecure. Removed ([#35192](https://github.com/kubernetes/kubernetes/pull/35192), [@jszczepkowski](https://github.com/jszczepkowski))
    * experimental support for master replication.
* Add support for vSphere Cloud Provider when deploying via kubeup on vSphere. ([#31467](https://github.com/kubernetes/kubernetes/pull/31467), [@kerneltime](https://github.com/kerneltime))