`--bootstrap-kubeconfig` argument to Kubelet previously created the first bootstrap client credentials in the certificates directory as `kubelet-client.key` and `kubelet-client.crt`.  Subsequent certificates created by cert rotation were created in a combined PEM file that was atomically rotated as `kubelet-client-DATE.pem` in that directory, which meant clients relying on the `node.kubeconfig` generated by bootstrapping would never use a rotated cert.  The initial bootstrap certificate is now generated...

- Changed how KMS v2 encryption at rest can generate data encryption keys.

   * **NOTE:** Self-hosting will be the default way to host the control plane in the next release, v1.9

* [alpha] A new `phase` subcommand supports performing only subtasks of the full `kubeadm init` flow. Combined with fine-grained configuration, kubeadm is now more easily consumable by higher-level provisioning tools like kops or GKE. ([#356](https://github.com/kubernetes/enhancements/issues/356), [@luxas](https://github.com/luxas))

- CEL regex patterns in x-kubernetes-valiation rules are compiled when CRDs are created/updated if the pattern is provided as a string constant in the expression. Any regex compile errors are reported as a CRD create/update validation error. ([#108617](https://github.com/kubernetes/kubernetes/pull/108617), [@jpbetz](https://github.com/jpbetz))

We expect this implementation to progress from alpha to beta and GA in coming releases, so we’re eager to have you comment about your dual-stack experiences in [#k8s-dual-stack](https://kubernetes.slack.com/messages/k8s-dual-stack) or in [enhancements #563](https://features.k8s.io/563). 

### go1.15.5

A regression bug was found where guaranteed Pods with multiple containers do not work properly with set allocations for CPU, Memory, and Device manager. [The fix will be availability in coming releases](https://github.com/kubernetes/kubernetes/pull/103979).

### `CSIMigrationvSphere` feature gate has not migrated to new CRD APIs

* Reverted conversion of influx-db to Pet Set, it is now a Replication Controller. ([#30080](https://github.com/kubernetes/kubernetes/pull/30080), [@jszczepkowski](https://github.com/jszczepkowski))
* rbac validation: rules can't combine non-resource URLs and regular resources ([#29930](https://github.com/kubernetes/kubernetes/pull/29930), [@ericchiang](https://github.com/ericchiang))

- Cinder volume limit can now be configured from node too ([#74542](https://github.com/kubernetes/kubernetes/pull/74542), [@gnufied](https://github.com/gnufied))
- It is now possible to combine the `-f` and `-l` flags in `kubectl logs` ([#67573](https://github.com/kubernetes/kubernetes/pull/67573), [@m1kola](https://github.com/m1kola))

#### Rkt runtime Known Issues

- A detailed list of known issues can be found [here](https://github.com/kubernetes/kubernetes.github.io/blob/release-1.3/docs/getting-started-guides/rkt/notes.md)

*More Instructions coming soon*

## Provider-specific Notes

* AWS
  * Support for ap-northeast-2 region (Seoul)
  * Allow cross-region image pulling with ECR
  * More reliable kube-up/kube-down

- Fixed the issue where pod with ordinal number lower than the rolling partitioning number was being deleted. It was coming up with updated image. ([#120731](https://github.com/kubernetes/kubernetes/pull/120731), [@adilGhaffarDev](https://github.com/adilGhaffarDev))