fix docker driver

cmd/minikube/cmd/start.go

@@ -357,18 +357,19 @@ func runStart(cmd *cobra.Command, args []string) {
 	if numNodes > 1 {
 		if driver.BareMetal(driverName) {
 			out.T(out.Meh, "The none driver is not compatible with multi-node clusters.")
-		}
-		for i := 1; i < numNodes; i++ {
-			nodeName := fmt.Sprintf("m%02d", i+1)
-			n := config.Node{
-				Name:              nodeName,
-				Worker:            true,
-				ControlPlane:      false,
-				KubernetesVersion: cc.KubernetesConfig.KubernetesVersion,
-			}
-			err := node.Add(&cc, n)
-			if err != nil {
-				exit.WithError("adding node", err)
+		} else {
+			for i := 1; i < numNodes; i++ {
+				nodeName := fmt.Sprintf("m%02d", i+1)
+				n := config.Node{
+					Name:              nodeName,
+					Worker:            true,
+					ControlPlane:      false,
+					KubernetesVersion: cc.KubernetesConfig.KubernetesVersion,
+				}
+				err := node.Add(&cc, n)
+				if err != nil {
+					exit.WithError("adding node", err)
+				}
 			}
 		}
 	}

pkg/minikube/driver/driver.go

@@ -236,3 +236,11 @@ func MachineName(cc config.ClusterConfig, n config.Node) string {
 	}
 	return fmt.Sprintf("%s-%s", cc.Name, n.Name)
 }
+
+// ClusterNameFromMachine retrieves the cluster name embedded in the machine name
+func ClusterNameFromMachine(name string) string {
+	if strings.Contains(name, "-") {
+		return strings.Split(name, "-")[0]
+	}
+	return name
+}

pkg/provision/provision.go

@@ -39,6 +39,7 @@ import (
 	"k8s.io/minikube/pkg/minikube/assets"
 	"k8s.io/minikube/pkg/minikube/command"
 	"k8s.io/minikube/pkg/minikube/config"
+	"k8s.io/minikube/pkg/minikube/driver"
 	"k8s.io/minikube/pkg/minikube/sshutil"
 )
 
@@ -195,7 +196,7 @@ func setRemoteAuthOptions(p provision.Provisioner) auth.Options {
 }
 
 func setContainerRuntimeOptions(name string, p miniProvisioner) error {
-	cluster := strings.Split(name, "-")[0]
+	cluster := driver.ClusterNameFromMachine(name)
 	c, err := config.Load(cluster)
 	if err != nil {
 		return errors.Wrap(err, "getting cluster config")