- Kube-apiserver: Authorization webhooks now report the following metrics:
  - apiserver_authorization_webhook_evaluations_total
  - apiserver_authorization_webhook_duration_seconds
  - apiserver_authorization_webhook_evaluations_fail_open_total ([#123639](https://github.com/kubernetes/kubernetes/pull/123639), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Auth and Testing]

* The kube-apiserver [basic audit log](https://kubernetes.io/docs/admin/audit/) can be enabled in GCE by exporting the environment variable `ENABLE_APISERVER_BASIC_AUDIT=true` before running `cluster/kube-up.sh`. This will log to `/var/log/kube-apiserver-audit.log` and use the same `logrotate` settings as `/var/log/kube-apiserver.log`. ([#41211](https://github.com/kubernetes/kubernetes/pull/41211), [@enisoc](https://github.com/enisoc))...

    * If you are upgrading your Cluster Federation components from v1.3.x, please run this command to migrate the federation-apiserver-secret to federation-apiserver-kubeconfig serect;
    ```$ kubectl --namespace=federation get secret federation-apiserver-secret -o json | sed 's/federation-apiserver-secret/federation-apiserver-kubeconfig/g' | kubectl create -f -```
    * You might also want to delete the old secret using this command:

k8s.io/api v0.30.0/go.mod h1:OPlaYhoHs8EQ1ql0R/TsUgaRPhpKNxIMrKQfWUp8QSE=
k8s.io/apiextensions-apiserver v0.18.2/go.mod h1:q3faSnRGmYimiocj6cHQ1I3WpLqmDgJFlKL37fC4ZvY=
k8s.io/apiextensions-apiserver v0.18.4/go.mod h1:NYeyeYq4SIpFlPxSAB6jHPIdvu3hL0pc36wuRChybio=
k8s.io/apiextensions-apiserver v0.30.0 h1:jcZFKMqnICJfRxTgnC4E+Hpcq8UEhT8B2lhBcQ+6uAs=
k8s.io/apiextensions-apiserver v0.30.0/go.mod h1:N9ogQFGcrbWqAY9p2mUAL5mGxsLqwgtUce127VtRX5Y=