* **WARNING:** A [known issue](https://github.com/kubernetes/kubernetes/issues/43815)
    in v1.6.0 causes `kubeadm init` to hang. Please use v1.6.1, which fixes the issue.
  * All communication is now over TLS
  * Authorization plugins can be installed by kubeadm, including the new default of RBAC
  * The bootstrap token system now allows token management and expiration

### SIG Windows development tools

### SIG CLI

    - `apiserver_flowcontrol_demand_seats_high_watermark`: High watermark, over last adjustment period, of demand_seats
    - `apiserver_flowcontrol_demand_seats_average`: Time-weighted average, over last adjustment period, of demand_seats
    - `apiserver_flowcontrol_demand_seats_stdev`: Time-weighted standard deviation, over last adjustment period, of demand_seats

### Bug or Regression

- Added jitter factor to lease controller that better smears load on kube-apiserver over time. ([#101652](https://github.com/kubernetes/kubernetes/pull/101652), [@marseel](https://github.com/marseel)) [SIG API Machinery and Scalability]

- A new `kubelet_preemptions` metric is reported from Kubelets to track the number of preemptions occurring over time, and which resource is triggering those preemptions. ([#84120](https://github.com/kubernetes/kubernetes/pull/84120), [@smarterclayton](https://github.com/smarterclayton))

forwarded to kubelet static pods to control pull policy for etcd and control plane images. This option allows for precise image pull policy specification for master nodes and thus for more tight control over images. It is useful in CI environments and in environments, where the user has total control over master VM templates (thus, the master VM templates can be preloaded with the required Docker images for the control plane services). ([#58960](https://github.com/kubernetes/kubernetes/pull/58960), [...

- RemoteCommand feature gates for kubectl exec, cp, and attach over WebSockets are now enabled by default (Beta):
  - Server-side feature gate: `TranslateStreamCloseWebsocketRequests`
  - Client-side (kubectl) feature gate: `KUBECTL_REMOTE_COMMAND_WEBSOCKETS`

- Fixed a bug that a pod's .status.nominatedNodeName is not cleared properly, and thus over-occupied system resources. ([#107109](https://github.com/kubernetes/kubernetes/pull/107109), [@Huang-Wei](https://github.com/Huang-Wei)) [SIG Scheduling and Testing]

- Fix kube-apiserver not to create default/kubernetes service endpoints before it reports readiness via the /healthz and therefore is ready to serve requests. Also early during startup old endpoints are remove which might be left over from a previously crashed kube-apiserver. ([#74668](https://github.com/kubernetes/kubernetes/pull/74668), [@sttts](https://github.com/sttts))