add more constants

cmd/minikube/cmd/config/profile_list.go

@@ -25,6 +25,7 @@ import (
 
 	"k8s.io/minikube/pkg/minikube/bootstrapper/bsutil/kverify"
 	"k8s.io/minikube/pkg/minikube/config"
+	"k8s.io/minikube/pkg/minikube/constants"
 	"k8s.io/minikube/pkg/minikube/driver"
 	"k8s.io/minikube/pkg/minikube/exit"
 	"k8s.io/minikube/pkg/minikube/machine"
@@ -165,7 +166,7 @@ func profilesToTableData(profiles []*config.Profile) [][]string {
 		}
 
 		k8sVersion := p.Config.KubernetesConfig.KubernetesVersion
-		if k8sVersion == "v0.0.0" { // for --no-kubernetes flag
+		if k8sVersion == constants.NoKubernetesVersion { // for --no-kubernetes flag
 			k8sVersion = "N/A"
 		}
 		data = append(data, []string{p.Name, p.Config.Driver, p.Config.KubernetesConfig.ContainerRuntime, cp.IP, strconv.Itoa(cp.Port), k8sVersion, p.Status, strconv.Itoa(len(p.Config.Nodes))})

cmd/minikube/cmd/start.go

@@ -433,7 +433,7 @@ func displayEnviron(env []string) {
 }
 
 func showKubectlInfo(kcs *kubeconfig.Settings, k8sVersion string, machineName string) error {
-	if k8sVersion == "v0.0.0" {
+	if k8sVersion == constants.NoKubernetesVersion {
 		register.Reg.SetStep(register.Done)
 		out.Step(style.Ready, "Done! minikube is ready without Kubernetes!")
 		out.BoxedWithConfig(box.Config{Py: 1, Px: 4, Type: "Round", Color: "Green"}, style.Tip, "Things to try without Kubernetes ...", `- "minikube ssh" to SSH into minikube's node.

pkg/minikube/node/start.go

@@ -89,7 +89,7 @@ type Starter struct {
 // Start spins up a guest and starts the Kubernetes node.
 func Start(starter Starter, apiServer bool) (*kubeconfig.Settings, error) {
 	var kcs *kubeconfig.Settings
-	if starter.Node.KubernetesVersion == "v0.0.0" {
+	if starter.Node.KubernetesVersion == constants.NoKubernetesVersion { // do not bootstrap cluster if --no-kubernetes
 		return kcs, config.Write(viper.GetString(config.ProfileName), starter.Cfg)
 	}
 	// wait for preloaded tarball to finish downloading before configuring runtimes
@@ -294,7 +294,7 @@ func Provision(cc *config.ClusterConfig, n *config.Node, apiServer bool, delOnFa
 	if !apiServer {
 		startingPhrase = "Starting worker node"
 	}
-	if cc.KubernetesConfig.KubernetesVersion == "v0.0.0" {
+	if cc.KubernetesConfig.KubernetesVersion == constants.NoKubernetesVersion {
 		startingPhrase = "Starting minikube without Kubernetes"
 	}