* Kubernetes server components using `kubeconfig` files no longer default to `http://localhost:8080`.  Administrators must specify a server value in their kubeconfig files. ([#30808](https://github.com/kubernetes/kubernetes/pull/30808), [@smarterclayton](https://github.com/smarterclayton))

### kube-proxy
* In 1.7, the kube-proxy component has been converted to use a configuration file. The old flags still work in 1.7, but they are being deprecated and will be removed in a future release. Cluster administrators are advised to switch to using the configuration file, but no action is strictly necessary in 1.7. ([#34727](https://github.com/kubernetes/kubernetes/pull/34727), [@ncdc](https://github.com/ncdc))

### Namespace

- Updating kubelet permissions check for Windows nodes to see if process is elevated instead of checking if process owner is in Administrators group ([#111079](https://github.com/kubernetes/kubernetes/pull/111079), [@marosset](https://github.com/marosset)) [SIG Node and Windows]

## Dependencies

### Added
_Nothing has changed._

- Kubeadm: make sure the etcd static pod startup probe uses /health?serializable=false while the liveness probe uses /health?serializable=true&exclude=NOSPACE. The NOSPACE exclusion would allow administrators to address space issues one member at a time. ([#110744](https://github.com/kubernetes/kubernetes/pull/110744), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

- A new set of alpha metrics are reported by the Kubernetes scheduler under the `/metrics/resources` endpoint that allow administrators to easily see the resource consumption (requests and limits for all resources on the pods) and compare it to actual pod usage or node capacity. ([#94866](https://github.com/kubernetes/kubernetes/pull/94866), [@smarterclayton](https://github.com/smarterclayton))...

- Updating kubelet permissions check for Windows nodes to see if process is elevated instead of checking if process owner is in Administrators group ([#108146](https://github.com/kubernetes/kubernetes/pull/108146), [@marosset](https://github.com/marosset))

* Allow remote admission controllers to be dynamically added and removed by administrators.  External admission controllers make an HTTP POST containing details of the requested action which the service can approve or reject. ([#46388](https://github.com/kubernetes/kubernetes/pull/46388), [@lavalamp](https://github.com/lavalamp))

- Added a "reason" field to the "image_garbage_collected_total" metric, allowing administrators to differentiate between images that were collected for reasons "age" vs "space".
   ([#123345](https://github.com/kubernetes/kubernetes/pull/123345), [@haircommander](https://github.com/haircommander))

  previous releases. When this happens, a `LifecycleHTTPFallback` event is recorded
  in the namespace of the pod and a `kubelet_lifecycle_handler_http_fallbacks_total`
  metric in the kubelet is incremented. Cluster administrators can opt out of the
  expanded lifecycle handler capabilities by setting
  `--feature-gates=ConsistentHTTPGetHandlers=false` in `kubelet`.'

that are visible to `kubectl` users and API consumers, and metrics visible to cluster administrators.
Requests to a deprecated API are returned with a warning containing a target removal release and any replacement API.