- Following metrics from kube-controller-manager are now marked as with the ALPHA stability level:
  `storage_count_attachable_volumes_in_use`
  `attachdetach_controller_total_volumes`
  `pv_collector_bound_pv_count`
  `pv_collector_unbound_pv_count`
  `pv_collector_bound_pvc_count`
  `pv_collector_unbound_pvc_count`
  ([#84896](https://github.com/kubernetes/kubernetes/pull/84896), [@RainbowMango](https://github.com/RainbowMango))

- Some apiserver metrics were changed, as follows.
  - `priority_level_seat_count_samples` is replaced with `priority_level_seat_utilization`, which samples every nanosecond rather than every millisecond; the old metric conveyed utilization despite its name.
  - `priority_level_seat_count_watermarks` is removed.

* Add `container_state` label to `running_container_count` kubelet metrics, to get count of containers based on their state(running/exited/created/unknown) ([#81573](https://github.com/kubernetes/kubernetes/pull/81573),...

        * `apiserver_request_count`
        * `apiserver_request_latencies`
        * `apiserver_request_latencies_summary`
        * `apiserver_dropped_requests`
        * `etcd_helper_cache_hit_count`
        * `etcd_helper_cache_miss_count`
        * `etcd_helper_cache_entry_count`
        * `etcd_request_cache_get_latencies_summary`

- Exposed CSI volume stats via kubelet volume metrics ([#76188](https://github.com/kubernetes/kubernetes/pull/76188), [@humblec](https://github.com/humblec))
- Added a new `storage_operation_status_count` metric for kube-controller-manager and kubelet to count success and error statues. ([#75750](https://github.com/kubernetes/kubernetes/pull/75750), [@msau42](https://github.com/msau42))

### Deprecated/changed metrics

* kube-apiserver: the default `--endpoint-reconciler-type` is now `lease`. The `master-count` endpoint reconciler type is deprecated and will be removed in 1.13. ([#63383](https://github.com/kubernetes/kubernetes/pull/63383), [@liggitt](https://github.com/liggitt))

### Bug or Regression

- Avoid systemd-logind loading configuration warning ([#97950](https://github.com/kubernetes/kubernetes/pull/97950), [@wzshiming](https://github.com/wzshiming)) [SIG Node]
- Count pod overhead against an entity's ResourceQuota ([#99600](https://github.com/kubernetes/kubernetes/pull/99600), [@gjkim42](https://github.com/gjkim42)) [SIG API Machinery and Node]

- This PR adds the following metrics for API Priority and Fairness.
  - **apiserver_flowcontrol_priority_level_seat_count_samples**: histograms of seats occupied by executing requests (both regular and final-delay phases included), broken down by priority_level; the observations are taken once per millisecond.

- Fix handing special characters in the volume path on Windows ([#99138](https://github.com/kubernetes/kubernetes/pull/99138), [@yujuhong](https://github.com/yujuhong)) [SIG Storage]

### Bug or Regression

- Count pod overhead against an entity's ResourceQuota ([#99600](https://github.com/kubernetes/kubernetes/pull/99600), [@gjkim42](https://github.com/gjkim42)) [SIG API Machinery and Node]

- Kube-apiserver: the `--master-count` flag and `--endpoint-reconciler-type=master-count` reconciler are deprecated in favor of the lease reconciler ([#108062](https://github.com/kubernetes/kubernetes/pull/108062), [@aojea](https://github.com/aojea))