- The kubelet now only collects cgroups metrics for the node, container runtime, kubelet, pods, and containers. ([#72787](https://github.com/kubernetes/kubernetes/pull/72787), [@dashpole](https://github.com/dashpole))

#### Storage

- Promoted the `AuthorizeWithSelectors` and `AuthorizeNodeWithSelectors` feature gates to stable and locked on. ([#132656](https://github.com/kubernetes/kubernetes/pull/132656), [@liggitt](htt...

- API Server tracing now includes the latency of authorization, priorityandfairness, impersonation, audit, and authentication filters. ([#113217](https://github.com/kubernetes/kubernetes/pull/113217), [@dashpole](https://github.com/dashpole))

* Fixes a bug in previous releases where a pod could be placed inside another pod's cgroup when specifying --cgroup-root ([#70678](https://github.com/kubernetes/kubernetes/pull/70678), [@dashpole](https://github.com/dashpole))

- Fix detection of image filesystem, disk metrics for devicemapper, detection of OOM Kills on 5.0+ linux kernels. ([#92919](https://github.com/kubernetes/kubernetes/pull/92919), [@dashpole](https://github.com/dashpole)) [SIG API Machinery, CLI, Cloud Provider, Cluster Lifecycle, Instrumentation and Node]

  - cAdvisor json endpoints have been deprecated since 1.15. ([#78504](https://github.com/kubernetes/kubernetes/pull/78504), [@dashpole](https://github.com/dashpole))

* Fix cadvisor_unsupported and the crossbuild ([#35817](https://github.com/kubernetes/kubernetes/pull/35817), [@luxas](https://github.com/luxas))

- `APIServerTracing` feature gate is now enabled by default. Tracing in the API
  Server is still disabled by default, and requires a config file to enable. ([#116144](https://github.com/kubernetes/kubernetes/pull/116144), [@dashpole](https://github.com/dashpole))
- `NodeResourceFit` and `NodeResourcesBalancedAllocation` implement the `PreScore`

- Respect the incoming trace context for authenticated requests to the kube-apiserver for APIServer tracing. ([#127053](https://github.com/kubernetes/kubernetes/pull/127053), [@dashpole](https://github.com/dashpole)) [SIG API Machinery, Architecture, Auth, CLI, Cloud Provider, Instrumentation, Network, Node and Testing]

  This is a partial revert of [#86282](https://github.com/kubernetes/kubernetes/pull/86282), which was added in 1.18.0, and initially removed the _total suffix ([#89540](https://github.com/kubernetes/kubernetes/pull/89540), [@dashpole](https://github.com/dashpole)) [SIG Instrumentation and Node]