- NFS Drivers are now enabled to collect metrics, StatFS metrics provider is used to collect the metrics. (@brahmaroutu) ([#75805](https://github.com/kubernetes/kubernetes/pull/75805), [@brahmaroutu](https://github.com/brahmaroutu))

* Fix photon controller plugin to construct with correct PdID ([#37167](https://github.com/kubernetes/kubernetes/pull/37167), [@luomiao](https://github.com/luomiao))
* Collect logs for dead kubelets too ([#37671](https://github.com/kubernetes/kubernetes/pull/37671), [@mtaufen](https://github.com/mtaufen))

- Kubeadm: perform pre-flight validation on host/node name upon `kubeadm init` and `kubeadm join`,...

#### Garbage Collector
* The garbage collector now supports custom APIs added via Custom Resource Definitions
  or aggregated API servers. The garbage collector controller refreshes periodically.
  Therefore, expect a latency of about 30 seconds between when an API is added and when
  the garbage collector starts to manage it.


#### Monitoring/Prometheus

* fluentd-gcp addon: Fix a bug in the event-exporter, when repeated events were not sent to Stackdriver. ([#50511](https://github.com/kubernetes/kubernetes/pull/50511), [@crassirostris](https://github.com/crassirostris))
* Collect metrics from Heapster in Stackdriver mode. ([#50517](https://github.com/kubernetes/kubernetes/pull/50517), [@piosz](https://github.com/piosz))

- APIServerTracing now collects spans from etcd client calls, and propagates context to etcd. ([#103216](https://github.com/kubernetes/kubernetes/pull/103216), [@dashpole](https://github.com/dashpole)) [SIG API Machinery, Cloud Provider and Instrumentation]

* kube-apiserver: the OpenID Connect authenticator can now verify ID Tokens signed with JOSE algorithms other than RS256 through the --oidc-signing-algs flag. ([#58544](https://github.com/kubernetes/kubernetes/pull/58544), [@ericchiang](https://github.com/ericchiang))

* This fix prevents a GCE PD volume from being mounted if the udev device link is stale and tries to correct the link. ([#66832](https://github.com/kubernetes/kubernetes/pull/66832), [@msau42](https://github.com/msau42))

fields with incorrect case will no longer be valid. You must correct these files before upgrading.** When specifying keys in JSON resource definitions during direct API server communication, the keys are case-sensitive. A bug introduced in Kubernetes 1.8 caused the API server to accept a request with incorrect case and coerce it to correct case, but this behaviour has been fixed in 1.11 and the API server will once again be enforcing the correct case. It’s worth noting that during this time, the `kubectl`...

- New Azure instance types do now have correct max data disk count information. ([#94340](https://github.com/kubernetes/kubernetes/pull/94340), [@ialidzhikov](https://github.com/ialidzhikov)) [SIG Cloud Provider and Storage]

### Other (Cleanup or Flake)