In-tree bug fixes and improvements included:
- Fix load balancer status without VIP.
- Fix filtering of server status.
- Fix resizing PVC of Cinder volume.
- Disable load balancer configuration if it is not defined in cloud config.
- Add support for node shutdown taint.

The external provider includes all of the above with the additional fixes and features:
- Fix bug to prevent allocation of existing floating IP.

* [stable] Upgrade cAdvisor to v0.27.1 with the enhancement for node monitoring. [[@dashpole](https://github.com/dashpole)]

  * Fix journalctl leak
  * Fix container memory rss
  * Fix incorrect CPU usage with 4.7 kernel
  * OOM parser uses kmsg
  * Add hugepages support
  * Add CRI-O support

  ......
- Azure: fix a bug that kube-controller-manager would panic if wrong Azure VMSS name is configured ([#94306](https://github.com/kubernetes/kubernetes/pull/94306), [@knight42](https://github.com/knight42)) [SIG Cloud Provider]
- Fix a concurrent map writes error in kubelet ([#93773](https://github.com/kubernetes/kubernetes/pull/93773), [@knight42](https://github.com/knight42)) [SIG Node]

- Fix detach azure disk issue when vm not exist ([#95177](https://github.com/kubernetes/kubernetes/pull/95177), [@andyzhangx](https://github.com/andyzhangx)) [SIG Cloud Provider]
- Fix etcd_object_counts metric reported by kube-apiserver ([#94817](https://github.com/kubernetes/kubernetes/pull/94817), [@tkashem](https://github.com/tkashem)) [SIG API Machinery]

- Fix performance regression in scheduler caused by frequent metric lookup on critical code path. ([#117594](https://github.com/kubernetes/kubernetes/pull/117594), [@tosi3k](https://github.com/tosi3k)) [SIG Scheduling]
- Fix restricted debug profile. ([#117543](https://github.com/kubernetes/kubernetes/pull/117543), [@mochizuki875](https://github.com/mochizuki875)) [SIG CLI and Testing]

* Rework Kubelet set `/etc/hosts` behavior to fix conformance testability ([#61613](https://github.com/kubernetes/kubernetes/pull/61613), [@dims](https://github.com/dims))
* Fix `RunAsGroup` which doesn't work since 1.10. ([#65926](https://github.com/kubernetes/kubernetes/pull/65926), [@Random-Liu](https://github.com/Random-Liu))

### Other notable changes

* kubelet: fix hangs in updating Node status after network interruptions/changes between the kubelet and API server ([#63492](https://github.com/kubernetes/kubernetes/pull/63492), [@liggitt](https://github.com/liggitt))
* fix mount unmount failure for a Windows pod ([#63272](https://github.com/kubernetes/kubernetes/pull/63272), [@andyzhangx](https://github.com/andyzhangx))

- Fix a bug that `--disabled-metrics` doesn't function well. (#106391, @Huang-Wei) [SIG API Machinery, Cluster Lifecycle and Instrumentation]
- Fix a panic in kubectl when creating secrets with an improper output type (#106354, @lauchokyip) [SIG CLI]
- Fix concurrent map access causing panics when logging timed-out API calls. (#106113, @marseel) [SIG API Machinery]

    * Fix kubernetes-master charm starting services before TLS certs are saved

    * Fix kubernetes-worker charm failures in LXD

    * Fix stop hook failure on kubernetes-worker charm

    * Fix handling of juju kubernetes-worker.restart-needed state

    * Fix nagios checks in charms

* Fix logrotate config on GCI ([#29139](https://github.com/kubernetes/kubernetes/pull/29139), [@adityakali](https://github.com/adityakali))
* Do not query the metadata server to find out if running on GCE.  Retry metadata server query for gcr if running on gce. ([#28871](https://github.com/kubernetes/kubernetes/pull/28871), [@vishh](https://github.com/vishh))