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 into the cert directory as a PEM file and symlinked to `kubelet-client-current.pem` so that the generated kubeconfig remains valid after rotation. ([#62152](https://github.com/kubernetes/kubernetes/pull/62152), [@smarterclayton](https://github.com/smarterclayton))...

      - [CLI Changes](#cli-changes)
      - [Scheduling](#scheduling-1)
      - [Storage](#storage)
    - [Cluster Federation](#cluster-federation)
      - [[alpha] Federated Jobs](#alpha-federated-jobs)
      - [[alpha] Federated Horizontal Pod Autoscaling (HPA)](#alpha-federated-horizontal-pod-autoscaling-hpa)
    - [Node Components](#node-components)
      - [Autoscaling and Metrics](#autoscaling-and-metrics)

#### client-go:

- Applyconfiguration-gen now generates extract functions for all subresources ([#132665](https://github.com/kubernetes/kubernetes/pull/132665), [@mrIncompetent](https://github.com/mrIncompetent)) [SIG API Machinery]

- Api: validation of a `PodSpec` now rejects invalid `ResourceClaim` and `ResourceClaimTemplate` names. For a pod, the name generated for the `ResourceClaim` when using a template also must be valid. ([#116576](https://github.com/kubernetes/kubernetes/pull/116576), [@pohly](https://github.com/pohly))

*   Code generation for CRD and User API server types is improved with the addition of two new scripts to k8s.io/code-generator: `generate-groups.sh` and `generate-internal-groups.sh`. ([#52186](https://github.com/kubernetes/kubernetes/pull/52186),[ @sttts](https://github.com/sttts))

- The names of ResourceClaims generated from ResourceClaimTemplate are now generated. The base name is still `<pod>-<claim name>`, but a random suffix will avoid name collisions. ([#117351](https://github.com/kubernetes/kubernetes/pull/117351), [@pohly](https://github.com/pohly)) [SIG API Machinery, Apps, Auth,...

controllers/#noderestriction). In authentication, we added alpha-level support for automounting improved service account tokens through projected volumes. We also enabled [audience validation in TokenReview](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.13/#tokenreview-v1-authentication-k8s-io) for the new tokens for improved scoping. Under audit logging, the new alpha-level "dynamic audit configuration" adds support for [dynamically registering webhooks to receive a stream of...

HTTPGetAction will no longer follow redirects to different hostnames from the original probe request. Instead, these non-local redirects will be treated as a Success (the documented behavior). In this case an event with reason "ProbeWarning" will be generated, indicating that the redirect was ignored. If you were previously relying on the redirect to run health checks against different endpoints, you will need to perform the healthcheck logic outside the Kubelet, for instance by proxying the external...

- Adds two kubemark flags, `--max-pods` and `--extended-resources`. ([#100267](https://github.com/kubernetes/kubernetes/pull/100267), [@Jeffwan](https://github.com/Jeffwan))
- An audit log entry will be generated when a `ValidatingAdmissionWebhook` is failing to open. ([#92739](https://github.com/kubernetes/kubernetes/pull/92739), [@cnphil](https://github.com/cnphil))
- Base images: Updated to
  - debian-base:buster-v1.6.0