[overwrite of manual edits to GCP Health Checks](https://github.com/kubernetes/ingress/issues/842)
  managed by the GLBC Ingress Controller. This can cause the health checks to start failing,
  requiring you to reapply the manual edits.
  * This issue does not affect clusters that were already running Kubernetes v1.6.4 or higher.
  * This issue does not affect Health Checks that were left in the configuration

* kubeadm: fix "upgrade plan" not defaulting to a "stable" version if no version argument is passed ([#75900](https://github.com/kubernetes/kubernetes/pull/75900), [@neolit123](https://github.com/neolit123))

#### **Kubeadm**

- kubeadm no longer performs IPVS checks as part of its preflight checks ([#81791](https://github.com/kubernetes/kubernetes/pull/81791), [@yastij](https://github.com/yastij))

- Removed `/livez` livezchecks for KMS v1 and v2 to ensure KMS health does not cause `kube-apiserver` restart. KMS health checks are still in place as a healthz and readiness checks. ([#120583](https://github.com/kubernetes/kubernetes/pull/120583), [@ritazh](https://github.com/ritazh))

- Exposed the kube-scheduler "/livez" and "/readz" endpoints for health checks that are in compliance with https://kubernetes.io/docs/reference/using-api/health-checks/#api-endpoints-for-health. ([#118148](https://github.com/kubernetes/kubernetes/pull/118148), [@linxiulei](https://github.com/linxiulei)) [SIG API Machinery, Scheduling and Testing]

- It is now possible to use named ports in the `kubectl port-forward` command ([#69477](https://github.com/kubernetes/kubernetes/pull/69477), [@m1kola](https://github.com/m1kola))
- `kubectl wait` now supports condition value checks other than true using `--for condition=available=false` ([#69295](https://github.com/kubernetes/kubernetes/pull/69295), [@deads2k](https://github.com/deads2k))

* Use port 20256 for node-problem-detector in standalone mode. ([#49316](https://github.com/kubernetes/kubernetes/pull/49316), [@ajitak](https://github.com/ajitak))
* GCE Cloud Provider: New created LoadBalancer type Service will have health checks for nodes by default if all nodes have version >= v1.7.2. ([#49330](https://github.com/kubernetes/kubernetes/pull/49330), [@MrHohn](https://github.com/MrHohn))

* Change Azure ARM Rate limiting error message. ([#65292](https://github.com/kubernetes/kubernetes/pull/65292), [@wgliang](https://github.com/wgliang))
* AWS now checks for validity of ecryption key when creating encrypted volumes. Dynamic provisioning of encrypted volume may get slower due to these checks. ([#65223](https://github.com/kubernetes/kubernetes/pull/65223), [@jsafrane](https://github.com/jsafrane))

* `kubeadm init` and `kubeadm join` invocations on newly installed systems can encounter a `/var/lib/kubelet is not empty` message during pre-flight checks that prevents setup. If this is the only pre-flight failure, it can be safely ignored with `--skip-preflight-checks`.

For more information, see [#53356](https://issue.k8s.io/53356#issuecomment-333748618).