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))...

#### client-go:

- Added the `applyconfiguration` generator to the code-generator script that generates server-side apply configuration and client APIs ([#114987](https://github.com/kubernetes/kubernetes/pull/114987), [@astefanutti](https://github.com/astefanutti))

      - [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)

- Projects which use k8s.io/code-generator and invoke `generate-groups` or `generate-internal-groups.sh` have a new, simpler script (`kube_codegen.sh`) they can use.  The old scripts are deprecated but remain intact. ([#117262](https://github.com/kubernetes/kubernetes/pull/117262), [@thockin](https://github.com/thockin))...

*   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))

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...

- Official binaries now include the golang generated build ID `buildid` instead of an empty string. ([#101411](https://github.com/kubernetes/kubernetes/pull/101411), [@saschagrunert](https://github.com/saschagrunert))
- Remove balanced attached node volumes feature. ([#102443](https://github.com/kubernetes/kubernetes/pull/102443), [@ravisantoshgudimetla](https://github.com/ravisantoshgudimetla))

    * The `generate-internal-groups.sh` script in k8s.io/code-generator will generate OpenAPI definitions by default in `pkg/generated/openapi`. Additional API group dependencies can be added via `OPENAPI_EXTRA_PACKAGES=<group>/<version> <group2>/<version2>...`.

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...