- Kubeadm: removed the integrated support for flex-volumes in kubeadm. Users were advised to migrate away from flex-volumes as recommended by SIG Storage, since 1.22. If kubeadm users wish to continue using the feature, they would need a custom image for the KCM that is not based on distroless, pass the KCM flag `--flex-volume-plugin-dir` and mount the...

- Fixed admission metrics in seconds. ([#72343](https://github.com/kubernetes/kubernetes/pull/72343), [@danielqsj](https://github.com/danielqsj))
- When a watch is closed by an HTTP2 load balancer and we are told to go away, skip printing the message to stderr by default.
- Spedup kubectl by >10 when calling out to kube-apiserver for discovery information. ([#73345](https://github.com/kubernetes/kubernetes/pull/73345), [@sttts](https://github.com/sttts))

...

* kubectl: This client version requires the `apps/v1` APIs, so it will not work against a cluster version older than v1.9.0. Note that kubectl only guarantees compatibility with clusters that are +/-1 minor version away. ([#61419](https://github.com/kubernetes/kubernetes/pull/61419), [@enisoc](https://github.com/enisoc))

- [KCCM - service controller]: enabled connection draining for terminating pods upon node downscale by the cluster autoscaler. This is done by not reacting to the taint used by the cluster autoscaler to indicate that the node is going away soon, thus keeping the node referenced by the load balancer until the VM has been completely deleted. ([#115204](https://github.com/kubernetes/kubernetes/pull/115204), [@alexanderConstantinescu](https://github.com/alexanderConstantinescu))

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- Kubeadm: apply `second stage` of the plan to migrate kubeadm away from the usage of the word `master` in labels and taints. For new clusters, the label `node-role.kubernetes.io/master` will no longer be added to control plane nodes, only the label `node-role.kubernetes.io/control-plane` will be added. For clusters...

## Thanks to our Contributors

This release contains contributions from many people at Google, as well as:

Abdullah Alrasheed, Achal Shah, Ad-530, ADiegoCAlonso, Aditya Yogi, Ag Ramesh,
akindyakov, Andy Kernahan, Anya Petrova, Aurelien Geron, Ben, Ben Barsdell,
Bhavani-Subramanian, braincodercn, Brett Koonce, Brian Nemsick, Brian Zier,
Bryan Heden, candy.dc, cclauss, Clayne Robison, ctiijima, Dalmo Cirne, David

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See [CVE-2021-32677](https://github.com/tiangolo/fastapi/security/advisories/GHSA-8h2j-cgx8-6xv7) for more details....