Allow user to override node name

Signed-off-by: Zhongcheng Lao <Zhongcheng.Lao@microsoft.com>

cmd/minikube/cmd/start.go

@@ -95,6 +95,7 @@ const (
 	keepContext           = "keep-context"
 	createMount           = "mount"
 	featureGates          = "feature-gates"
+	nodeName              = "node-name"
 	apiServerName         = "apiserver-name"
 	apiServerPort         = "apiserver-port"
 	dnsDomain             = "dns-domain"
@@ -193,6 +194,7 @@ func initKubernetesFlags() {
 	startCmd.Flags().String(apiServerName, constants.APIServerName, "The apiserver name which is used in the generated certificate for kubernetes.  This can be used if you want to make the apiserver available from outside the machine")
 	startCmd.Flags().StringArrayVar(&apiServerNames, "apiserver-names", nil, "A set of apiserver names which are used in the generated certificate for kubernetes.  This can be used if you want to make the apiserver available from outside the machine")
 	startCmd.Flags().IPSliceVar(&apiServerIPs, "apiserver-ips", nil, "A set of apiserver IP Addresses which are used in the generated certificate for kubernetes.  This can be used if you want to make the apiserver available from outside the machine")
+	startCmd.Flags().String(nodeName, constants.DefaultNodeName, "The node name")
 }
 
 // initDriverFlags inits the commandline flags for vm drivers
@@ -921,7 +923,7 @@ func generateCfgFromFlags(cmd *cobra.Command, k8sVersion string, drvName string)
 		KubernetesConfig: cfg.KubernetesConfig{
 			KubernetesVersion:      k8sVersion,
 			NodePort:               viper.GetInt(apiServerPort),
-			NodeName:               constants.DefaultNodeName,
+			NodeName:               viper.GetString(nodeName),
 			APIServerName:          viper.GetString(apiServerName),
 			APIServerNames:         apiServerNames,
 			APIServerIPs:           apiServerIPs,

pkg/minikube/bootstrapper/bsutil/kubelet.go

@@ -50,6 +50,9 @@ func NewKubeletConfig(k8s config.KubernetesConfig, r cruntime.Manager) ([]byte,
 	if _, ok := extraOpts["node-ip"]; !ok {
 		extraOpts["node-ip"] = k8s.NodeIP
 	}
+	if k8s.NodeName != "" {
+		extraOpts["hostname-override"] = k8s.NodeName
+	}
 
 	pauseImage := images.Pause(k8s.ImageRepository)
 	if _, ok := extraOpts["pod-infra-container-image"]; !ok && k8s.ImageRepository != "" && pauseImage != "" && k8s.ContainerRuntime != remoteContainerRuntime {