- Fix incorrectly report scope for request_duration_seconds and request_slo_duration_seconds metrics for POST custom resources API calls. ([#110009](https://github.com/kubernetes/kubernetes/pull/110009), [@azylinski](https://github.com/azylinski)) [SIG Instrumentation]

- OpenAPI spec and API reference now reflect dryRun query parameter for POST/PUT/PATCH operations ([#69359](https://github.com/kubernetes/kubernetes/pull/69359), [@roycaihw](https://github.com/roycaihw))

kubelet performing the TLS Bootstrap properly. Earlier, `kubeadm join` only did the discovery part and exited successfully without checking that the kubelet actually started properly and performed the TLS bootstrap correctly. Now, as kubeadm runs some post-join steps (for example, annotating the Node API object with the CRISocket), `kubeadm join` is now waiting for the kubelet to perform the TLS Bootstrap, and then uses that credential to perform further actions. This also improves the UX, as `kubeadm`...

### Dockershim deprecation

Docker as an underlying runtime is being deprecated. Docker-produced images will continue to work in your cluster with all runtimes, as they always have.
The Kubernetes community [has written a blog post about this in detail](https://blog.k8s.io/2020/12/02/dont-panic-kubernetes-and-docker/) with [a dedicated FAQ page for it](https://blog.k8s.io/2020/12/02/dockershim-faq/).

### External credential provider for client-go

- Implement the scheduling framework with `Reserve`, `Prebind`, `Permit`, `Post-bind`, `Queue sort` and `Unreserve` extension points.
([#77567](https://github.com/kubernetes/kubernetes/pull/77567), [@wgliang](https://github.com/wgliang))

*   The canonical pronunciation of kubectl is "cube control".
*   Added --raw to kubectl create to POST using the normal transport. ([#54245](https://github.com/kubernetes/kubernetes/pull/54245),[ @deads2k](https://github.com/deads2k))

- Take the context as the first argument of Schedule. ([#82119](https://github.com/kubernetes/kubernetes/pull/82119), [@wgliang](https://github.com/wgliang))
- Implement `post-filter` extension point for scheduling framework ([#78097](https://github.com/kubernetes/kubernetes/pull/78097), [@draveness](https://github.com/draveness))

* If CSINodeInfo and CSIMigration feature flags are active in the cluster, Kubelet will post NotReady until CSINode is initialized with basic volume plugin mechanism information for well-known drivers ([#74835](https://github.com/kubernetes/kubernetes/pull/74835), [@davidz627](https://github.com/davidz627))

- '`CSIMigrationvSphere` was upgraded to GA and locked to true. Do not upgrade to K8s
  1.26 if you need Windows, or XFS, or raw block support until vSphere CSI Driver
  adds support for them in a version post v2.7.x.'
   ([#113336](https://github.com/kubernetes/kubernetes/pull/113336), [@divyenpatel](https://github.com/divyenpatel))
- '`DelegateFSGroupToCSIDriver` feature is GA.'

- Kubeadm: ensure `image-pull-timeout` flag is respected during upgrade phase ([#90328](https://github.com/kubernetes/kubernetes/pull/90328), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]
- Kubeadm: fix a bug where post upgrade to 1.18.x, nodes cannot join the cluster due to missing RBAC ([#89537](https://github.com/kubernetes/kubernetes/pull/89537), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]