- kubeadm now deletes the bootstrap-kubelet.conf file after TLS bootstrap
  User relying on bootstrap-kubelet.conf should switch to kubelet.conf that contains node credentials ([#80676](https://github.com/kubernetes/kubernetes/pull/80676), [@fabriziopandini](https://github.com/fabriziopandini))

  * Automatically install updates on boot & reboot
  * Use optimized image based on Jessie by default
  * Add support for Ubuntu Wily
  * Master is configured with automatic restart-on-failure, via CloudWatch
  * Bootstrap reworked to be more similar to GCE; better supports reboots/restarts
  * Use an elastic IP for the master by default
  * Experimental support for node spot instances (set NODE\_SPOT\_PRICE=0.05)

#### GCE

		return shouldTrace(entry, traceOpts)
	}, &wg)
	if err != nil {
		return grid.NewRemoteErr(err)
	}

	// Publish bootstrap events that have already occurred before client could subscribe.
	if traceOpts.TraceTypes().Contains(madmin.TraceBootstrap) {
		go globalBootstrapTracer.Publish(ctx, globalTrace)
	}

* Fix a typo in prometheus-to-sd configuration, that drops some stackdriver metrics. ([#56473](https://github.com/kubernetes/kubernetes/pull/56473), [@loburm](https://github.com/loburm))
* Update jquery and bootstrap dependencies ([#56447](https://github.com/kubernetes/kubernetes/pull/56447), [@dashpole](https://github.com/dashpole))



# v1.7.11

		return shouldTrace(entry, traceOpts)
	}, nil)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	// Publish bootstrap events that have already occurred before client could subscribe.
	if traceOpts.TraceTypes().Contains(madmin.TraceBootstrap) {
		go globalBootstrapTracer.Publish(ctx, globalTrace)
	}

	for _, peer := range peers {

- Fixes a panic in kube-controller-manager cleaning up bootstrap tokens ([#82887](https://github.com/kubernetes/kubernetes/pull/82887), [@tedyu](https://github.com/tedyu))

* Renamed the API server flag `--experimental-bootstrap-token-auth` to `--enable-bootstrap-token-auth`. The old value is accepted with a warning in 1.8 and will be removed in 1.9. ([#51198](https://github.com/kubernetes/kubernetes/pull/51198), [@mattmoyer](https://github.com/mattmoyer))

- `cluster-bootstrap`: improved the security of the functions responsible for generation and validation of bootstrap tokens. ([#120400](https://github.com/kubernetes/kubernetes/pull/120400), [@neolit123](https://github.com/neolit123))

- Added...

- The deprecated `--experimental-bootstrap-kubeconfig` flag has been removed.
  This can be set via `--bootstrap-kubeconfig`. ([#103172](https://github.com/kubernetes/kubernetes/pull/103172), [@niulechuan](https://github.com/niulechuan))

### API Change