- Added apiserver_envelope_encryption_invalid_key_id_from_status_total to measure number of times an invalid keyID is returned by the Status RPC call. ([#115846](https://github.com/kubernetes/kubernetes/pull/115846), [@ritazh](https://github.com/ritazh)) [SIG API Machinery and Auth]

- Added `apiserver_envelope_encryption_dek_cache_filled` to measure number of records in data encryption key (DEK) cache. ([#119878](https://github.com/kubernetes/kubernetes/pull/119878), [@ritazh](https://github.com/ritazh))

    *  - `kubernetes` plugin adds metrics to measure kubernetes control plane latency.
    *  -  the `health` plugin now includes the `lameduck` option by default, which waits for a duration before shutting down.
* Kubeadm now includes CoreDNS version 1.6.5 ([#85108](https://github.com/kubernetes/kubernetes/pull/85108), [@rajansandeep](https://github.com/rajansandeep))
    *  - `kubernetes` plugin adds metrics to measure kubernetes control plane latency.

   ([#122571](https://github.com/kubernetes/kubernetes/pull/122571), [@p0lyn0mial](https://github.com/p0lyn0mial))
- Added the `apiserver_watch_cache_read_wait` metric to measure the watch cache impact on request latency.
   ([#123190](https://github.com/kubernetes/kubernetes/pull/123190), [@padlar](https://github.com/padlar))

*_admission_latencies_milliseconds metrics because they were reporting seconds rather than milliseconds. They were also subject to multiple naming guideline violations (units should be in base units and "duration" is the best practice labelling to measure the time a request takes). Please convert to use *_admission_duration_seconds and *_admission_duration_seconds_summary, as these now report the unit as described, and follow the instrumentation best practices. ([#75279](https://github.com/kuberne...

### Deploy a more secure control plane with kubeadm

A new alpha feature allows running the kubeadm control plane components as non-root users. This is a long requested security measure in kubeadm. To try it you must enable the kubeadm-specific `RootlessControlPlane` feature gate. When you deploy a cluster using this alpha feature, your control plane runs with lower privileges.

- API server's deprecated `--service-account-api-audiences` flag was removed.  Use `--api-audiences` instead. ([#108624](https://github.com/kubernetes/kubernetes/pull/108624), [@ialidzhikov](https://github.com/ialidzhikov))
- Ginkgo.Measure has been deprecated in Ginkgo V2, switch to use gomega/gmeasure instead ([#111065](https://github.com/kubernetes/kubernetes/pull/111065), [@chendave](https://github.com/chendave)) [SIG Autoscaling and Testing]

  or uncacheable. ([#117295](https://github.com/kubernetes/kubernetes/pull/117295), [@aojea](https://github.com/aojea))

- kube-controller-manager currently needs a writable `--cert-dir` (default is `/var/run/kubernetes`) for generating self-signed certificates, when no `--tls-cert-file` or `--tls-private-key-file`...

distinct arrays always represent distinct storage.
</p>
<p>
The array underlying a slice may extend past the end of the slice.
The <i>capacity</i> is a measure of that extent: it is the sum of
the length of the slice and the length of the array beyond the slice;
a slice of length up to that capacity can be created by