- New metrics are introduced related to Ensure Secret Pulled Images KEP:
      - kubelet_imagemanager_ondisk_pullintents - the number of pull intent records currently kept on disk
      - kubelet_imagemanager_ondisk_pulledrecords - the number of image pulled records currently kept on disk

- kubeadm: Control plane images (etcd, kube-apiserver, kube-proxy, etc.) no longer use arch suffixes. Arch suffixes are kept for kube-dns only. ([#66960](https://github.com/kubernetes/kubernetes/pull/66960),
[@rosti](https://github.com/rosti)) Courtesy of SIG Cluster Lifecycle, SIG Release, and SIG Testing

- kubeadm has graduated `kubeadm alpha phase` commands to `kubeadm init phase`. This means that the phases of creating a control-plane node are now tightly integrated as part of the `init` command. Alpha features, not yet ready for GA are still kept under `kubeadm alpha` and we appreciate feedback on them.
- `kubeadm init` and `kubeadm init phase` now have a `--image-repository` flag, improving support for environments with limited access to official kubernetes repository.

- Enabled use of pods with volumes and...

### API Change

- #### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:
  
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  ```
  
  #### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:
  
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### Feature

- **Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.**:
  
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kubernetes/enhancements: [#116](https://github.com/kubernetes/enhancements/issues/116) [[kep](https://github.com/kubernetes/enhancements/blob/master/keps/sig-windows/116-windows-node-support/README.md)]

Updated Plugin Mechanism for kubectl is Graduating to Stable ([#579](https://github.com/kubernetes/enhancements/issues/579))

 
## Changes by Kind

### Deprecation

- #### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:
  
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### Default Container Annotation

Pod with multiple containers can use `kubectl.kubernetes.io/default-container` annotation to have a container preselected for kubectl commands. More can be read in [KEP-2227](https://github.com/kubernetes/enhancements/blob/master/keps/sig-cli/2227-kubectl-default-container/README.md).

### Immutable Secrets and ConfigMaps