- Kubeadm: remove the deprecated "kubeadm alpha kubelet config enable-dynamic" command. To continue using the feature please defer to the guide for "Dynamic Kubelet Configuration" at k8s.io. This change also removes the parent...

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or use cri-dockerd if you are relying on Docker Engine as your container runtime.
For more information about ensuring your cluster is ready for this removal, please
see [this guide](https://kubernetes.io/blog/2022/03/31/ready-for-dockershim-removal/).

### Beta APIs Off by Default

[New beta APIs will not be enabled in clusters by default](https://github.com/kubernetes/enhancements/issues/3136).

ion`, `CustomResourceDefinition`, `APIService`, `TokenReview`, `SubjectAccessReview`, `CertificateSigningRequest`, `Lease`, `Ingress`, and `IngressClass` APIs. For the full list check out [Deprecated API Migration Guide](https://kubernetes.io/docs/reference/using-api/deprecation-guide/#v1-22) and the blog post [Kubernetes API and Feature Removals In 1.22: Here’s What You Need To Know](https://blog.k8s.io/2021/07/14/upcoming-changes-in-kubernetes-1-22/).

### Kubernetes release cadence...

* kubeadm: add a preflight check that throws a warning if the cgroup driver for Docker on Linux is not "systemd" as per the k8s.io CRI installation guide. ([#73837](https://github.com/kubernetes/kubernetes/pull/73837), [@neolit123](https://github.com/neolit123))

## Urgent Upgrade Notes 

### (No, really, you MUST read this before you upgrade)

- Deprecated beta APIs scheduled for removal in `v1.26` are no longer served. See https://kubernetes.io/docs/reference/using-api/deprecation-guide/#v1-26 for more information. ([#111973](https://github.com/kubernetes/kubernetes/pull/111973), [@liggitt](https://github.com/liggitt))

- Kubeadm: deprecate the "kubeadm alpha kubelet config enable-dynamic" command. To continue using the feature please defer to the guide for "Dynamic Kubelet Configuration" at k8s.io. ([#92881](https://github.com/kubernetes/kubernetes/pull/92881), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

## External Dependencies

Continuous integration builds use Docker versions 1.11.2, 1.12.6, 1.13.1,
and 17.03.2. These versions were validated on Kubernetes 1.8. However,
consult an appropriate installation or upgrade guide before deciding what
versions of Docker to use.

- Docker 1.13.1 and 17.03.2

    - Shared PID namespace, live-restore, and overlay2 were validated.

    - **Known issues**

## Major themes

Kubernetes is developed by community members whose work is organized into
[Special Interest Groups](https://github.com/kubernetes/community/blob/master/sig-list.md), which provide the themes that guide their work. For the 1.9 release, these themes included:

### API Machinery

Extensibility. SIG API Machinery added a new class of admission control webhooks (mutating), and brought the admission control webhooks to beta.

1F9A5..1F9AA  ; valid                  ;      ; NV8    # 12.0 SLOTH..OYSTER
1F9AB..1F9AD  ; valid                  ;      ; NV8    # 13.0 BEAVER..SEAL
1F9AE..1F9AF  ; valid                  ;      ; NV8    # 12.0 GUIDE DOG..PROBING CANE
1F9B0..1F9B9  ; valid                  ;      ; NV8    # 11.0 EMOJI COMPONENT RED HAIR..SUPERVILLAIN
1F9BA..1F9BF  ; valid                  ;      ; NV8    # 12.0 SAFETY VEST..MECHANICAL LEG