clusterCfg: kubeadmapi.ClusterConfiguration{},
			expected: kubeletConfig{
				config: kubeletconfig.KubeletConfiguration{
					FeatureGates:  map[string]bool{},
					StaticPodPath: kubeadmapiv1.DefaultManifestsDir,
					ClusterDNS:    []string{kubeadmapiv1.DefaultClusterDNSIP},
					Authentication: kubeletconfig.KubeletAuthentication{
						X509: kubeletconfig.KubeletX509Authentication{
							ClientCAFile: constants.CACertName,
						},

	}

	clusterDNS := ""
	dnsIP, err := constants.GetDNSIP(cfg.Networking.ServiceSubnet)
	if err != nil {
		clusterDNS = kubeadmapiv1.DefaultClusterDNSIP
	} else {
		clusterDNS = dnsIP.String()
	}

	if kc.config.ClusterDNS == nil {
		kc.config.ClusterDNS = []string{clusterDNS}
	} else if len(kc.config.ClusterDNS) != 1 || kc.config.ClusterDNS[0] != clusterDNS {

port: 8080
readOnlyPort: 10255
systemReserved:
  memory: 2Gi
clusterDNS:
  - 192.168.1.1
  - 192.168.1.5
  - 192.168.1.8
`,
			overwrittenConfigFields: map[string]interface{}{
				"Port":         int32(8080),
				"ReadOnlyPort": int32(10255),
				"SystemReserved": map[string]string{
					"memory": "2Gi",
				},
				"ClusterDNS": []string{"192.168.1.1", "192.168.1.5", "192.168.1.8"},
			},

	RegistryBurst:			s.RegistryBurst,
	MinimumGCAge:			s.MinimumGCAge,
	MaxPerPodContainerCount:	s.MaxPerPodContainerCount,
	MaxContainerCount:		s.MaxContainerCount,
	ClusterDomain:			s.ClusterDomain,
	ClusterDNS:			s.ClusterDNS,
	Runonce:			s.RunOnce,
	Port:				s.Port,
	ReadOnlyPort:			s.ReadOnlyPort,
	CadvisorInterface:		cadvisorInterface,
	EnableServer:			s.EnableServer,
	EnableDebuggingHandlers:	s.EnableDebuggingHandlers,

    MaxPerPodContainerCount:        s.MaxPerPodContainerCount,
    MaxContainerCount:              s.MaxContainerCount,
    ClusterDomain:                  s.ClusterDomain,
    ClusterDNS:                     s.ClusterDNS,
    Runonce:                        s.RunOnce,
    Port:                           s.Port,
    ReadOnlyPort:                   s.ReadOnlyPort,
    CadvisorInterface:              cadvisorInterface,

Design details [here](https://github.com/kubernetes/enhancements/blob/master/keps/sig-network/1024-nodelocal-cache-dns/README.md)

This feature is graduating to GA in release 1.18(Beta in release 1.15).

	c.SyncFrequency.Duration = 10 * time.Second
	c.EvictionPressureTransitionPeriod.Duration = 5 * time.Minute
	c.MaxPods = int32(opt.MaxPods)
	c.PodsPerCore = int32(opt.PodsPerCore)
	c.ClusterDNS = []string{}
	c.ImageGCHighThresholdPercent = 90
	c.ImageGCLowThresholdPercent = 80
	c.ProviderID = fmt.Sprintf("kubemark://%v", opt.NodeName)
	c.VolumeStatsAggPeriod.Duration = time.Minute
	c.CgroupRoot = ""