* change azure disk host cache to ReadOnly by default ([#72229](https://github.com/kubernetes/kubernetes/pull/72229), [@andyzhangx](https://github.com/andyzhangx))
* Fixes issue with cleaning up stale NFS subpath mounts ([#71804](https://github.com/kubernetes/kubernetes/pull/71804), [@msau42](https://github.com/msau42))

- Updates docs and guidance on cloud provider InstancesV2 and Zones interface for external cloud providers:
  - removes experimental warning for InstancesV2
  - document that implementation of InstancesV2 will disable calls to Zones

  - apiserver_flowcontrol_latest_s: S(the request last dispatched) = R(when that request starts executing in the virtual world)
  - apiserver_flowcontrol_next_s_bounds: min and max next S among non-empty queues

- Fix: Route controller should update routes with NodeIP changed ([#116361](https://github.com/kubernetes/kubernetes/pull/116361), [@lzhecheng](https://github.com/lzhecheng)) [SIG Cloud Provider]

### Bug or Regression

- Consider only plugin directory and not entire kubelet root when cleaning up mounts ([#112921](https://github.com/kubernetes/kubernetes/pull/112921), [@mattcary](https://github.com/mattcary)) [SIG Storage]

- Fix route conflicted operations when updating multiple routes together ([#88209](https://github.com/kubernetes/kubernetes/pull/88209), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]

* bootstrap: Start hostNetwork pods even if network plugin not ready ([#33347](https://github.com/kubernetes/kubernetes/pull/33347), [@justinsb](https://github.com/justinsb))
* Factor out post-init swagger and OpenAPI routes ([#32590](https://github.com/kubernetes/kubernetes/pull/32590), [@sttts](https://github.com/sttts))

### CVE-2021-25741: Symlink Exchange Can Allow Host Filesystem Access

A security issue was discovered in Kubernetes where a user may be able to
create a container with subpath volume mounts to access files &
directories outside of the volume, including on the host filesystem.

**Affected Versions**:
  - kubelet v1.22.0 - v1.22.1
  - kubelet v1.21.0 - v1.21.4
  - kubelet v1.20.0 - v1.20.10

- Fix: Route controller should update routes with NodeIP changed ([#116360](https://github.com/kubernetes/kubernetes/pull/116360), [@lzhecheng](https://github.com/lzhecheng)) [SIG Cloud Provider]

* vSphere kube-up: Wait for cbr0 configuration to complete before setting up routes. ([#35232](https://github.com/kubernetes/kubernetes/pull/35232), [@kerneltime](https://github.com/kerneltime))