- Kubeadm: Added support during the preflight check "CreateJob" of "kubeadm upgrade" to check if there are no nodes where a Pod can be scheduled. If there are none, show a warning and skip this preflight check. This can happen in single node clusters where the only node was drained. ([#124503](https://github.com/kubernetes/kubernetes/pull/124503), [@neolit123](https://github.com/neolit123))...

- Added authorization check support to the CEL expressions of ValidatingAdmissionPolicy via a `authorizer`

- Kubeadm: during the preflight check "CreateJob" of "kubeadm upgrade", check if there are no nodes where a Pod can schedule. If there are none, show a warning and skip this preflight check. This can happen in single node clusters where the only node was drained. ([#124570](https://github.com/kubernetes/kubernetes/pull/124570), [@neolit123](https://github.com/neolit123))...

- Removed `/livez` livezchecks for KMS v1 and v2 to ensure KMS health does not cause `kube-apiserver` restart. KMS health checks are still in place as a healthz and readiness checks. ([#120583](https://github.com/kubernetes/kubernetes/pull/120583), [@ritazh](https://github.com/ritazh))

- Bumped metrics-server to `v0.6.3`. ([#117120](https://github.com/kubernetes/kubernetes/pull/117120), [@dgrisonnet](https://github.com/dgrisonnet))

### Migration

Check out the [Pydantic migration guide](https://docs.pydantic.dev/2.0/migration/).