fix: fix incomplete cleanup in tunnel.json and zombie process in functional test

pkg/minikube/tunnel/registry.go

@@ -87,7 +87,10 @@ func (r *persistentRegistry) Register(tunnel *ID) (rerr error) {
 
 	alreadyExists := false
 	for i, t := range tunnels {
-		if t.Route.Equal(tunnel.Route) {
+		// it is allowed for multiple minikube clusters to have multiple tunnels simultaneously
+		// it is possible that an old tunnel from an old profile has duplicated route information
+		// so we need to check both machine name and route information
+		if tunnel.MachineName == t.MachineName && t.Route.Equal(tunnel.Route) {
 			isRunning, err := checkIfRunning(t.Pid)
 			if err != nil {
 				return fmt.Errorf("error checking whether conflicting tunnel (%v) is running: %s", t, err)

test/integration/functional_test.go

@@ -79,7 +79,7 @@ func TestFunctional(t *testing.T) {
 
 // TestFunctionalNewestKubernetes are functionality run functional tests using NewestKubernetesVersion
 func TestFunctionalNewestKubernetes(t *testing.T) {
-	if strings.Contains(*startArgs, "--kubernetes-version") {
+	if strings.Contains(*startArgs, "--kubernetes-version") || constants.NewestKubernetesVersion == constants.DefaultKubernetesVersion {
 		t.Skip()
 	}
 	k8sVersionString := constants.NewestKubernetesVersion
@@ -91,7 +91,7 @@ func TestFunctionalNewestKubernetes(t *testing.T) {
 
 func testFunctional(t *testing.T, k8sVersion string) {
 	profile := UniqueProfileName("functional")
-	ctx := context.WithValue(context.Background(), "k8sVersion", k8sVersion)
+	ctx := context.WithValue(context.Background(), ContextKey("k8sVersion"), k8sVersion)
 	ctx, cancel := context.WithTimeout(ctx, Minutes(40))
 	defer func() {
 		if !*cleanup {

test/integration/functional_test_tunnel_test.go

@@ -432,4 +432,9 @@ func validateTunnelDelete(_ context.Context, t *testing.T, _ string) {
 	checkRoutePassword(t)
 	// Stop tunnel
 	tunnelSession.Stop(t)
+	// prevent the child process from becoming a defunct zombie process
+	if err := tunnelSession.cmd.Wait(); err != nil {
+		t.Logf("failed to stop process: %v", err)
+		return
+	}
 }

test/integration/main_test.go

@@ -119,9 +119,11 @@ func StartArgs() []string {
 	return strings.Split(*startArgs, " ")
 }
 
+type ContextKey string
+
 func StartArgsWithContext(ctx context.Context) []string {
 	res := strings.Split(*startArgs, " ")
-	value := ctx.Value("k8sVersion")
+	value := ctx.Value(ContextKey("k8sVersion"))
 	if value != nil && value != "" {
 		res = append(res, fmt.Sprintf("--kubernetes-version=%s", value))
 	}