* GCE: provide an option to disable docker's live-restore on COS/ubuntu ([#55260](https://github.com/kubernetes/kubernetes/pull/55260), [@yujuhong](https://github.com/yujuhong))
* Fix kube-proxy hang due to panic when requesting a closed healthcheck. ([#46450](https://github.com/kubernetes/kubernetes/pull/46450), [@MrHohn](https://github.com/MrHohn))

- client-go

### API Change

* Added --log-facility flag to enhance dnsmasq logging ([#32422](https://github.com/kubernetes/kubernetes/pull/32422), [@MrHohn](https://github.com/MrHohn))
* Split dns healthcheck into two different urls ([#32406](https://github.com/kubernetes/kubernetes/pull/32406), [@MrHohn](https://github.com/MrHohn))

  unsupported.' ([#119346](https://github.com/kubernetes/kubernetes/pull/119346), [@chendave](https://github.com/chendave))
- '`kubeadm`: removed `system:masters` organization from `etcd/healthcheck-client`
  certificate.' ([#119859](https://github.com/kubernetes/kubernetes/pull/119859), [@SataQiu](https://github.com/SataQiu))

* Fix panic in ControllerManager on GCE when it has a problem with creating external loadbalancer healthcheck ([#52646](https://github.com/kubernetes/kubernetes/pull/52646), [@gmarek](https://github.com/gmarek))

- Kube-apiserver: The timeout used when making health check calls to etcd can now be configured with `--etcd-healthcheck-timeout`. The default timeout is 2 seconds, matching the previous behavior. ([#93244](https://github.com/kubernetes/kubernetes/pull/93244), [@Sh4d1](https://github.com/Sh4d1)) [SIG API Machinery]

- Kubemark is now built as a portable, static binary. ([#106150](https://github.com/kubernetes/kubernetes/pull/106150), [@pohly](https://github.com/pohly)) [SIG Scalability and Testing]
- Migrate `cmd/proxy/{config, healthcheck, winkernel}` to structured logging ([#104944](https://github.com/kubernetes/kubernetes/pull/104944), [@jyz0309](https://github.com/jyz0309))

	healthClient := rest.NewClient(serverURL, globalInternodeTransport, newCachedAuthToken())
	healthClient.NoMetrics = true

	// Construct a new health function.
	restClient.HealthCheckFn = func() bool {
		ctx, cancel := context.WithTimeout(context.Background(), restClient.HealthCheckTimeout)
		defer cancel()
		respBody, err := healthClient.Call(ctx, peerRESTMethodHealth, nil, nil, -1)

		if client == nil {
			continue
		}
		wg.Add(1)
		go func(idx int, client *peerRESTClient) {
			defer wg.Done()
			nodesOnlineIndex[idx] = client.restClient.HealthCheckFn()
		}(idx, client)
	}
	wg.Wait()

	for _, online := range nodesOnlineIndex {
		if online {
			nodesOnline++
		} else {
			nodesOffline++
		}
	}
	return
}