don't allow profile name to be less than 2 characters

cmd/minikube/cmd/start.go

@@ -155,7 +155,7 @@ func runStart(cmd *cobra.Command, args []string) {
 
 	if !config.ProfileNameValid(ClusterFlagValue()) {
 		out.WarningT("Profile name '{{.name}}' is not valid", out.V{"name": ClusterFlagValue()})
-		exit.Message(reason.Usage, "Only alphanumeric and dashes '-' are permitted. Minimum 1 character, starting with alphanumeric.")
+		exit.Message(reason.Usage, "Only alphanumeric and dashes '-' are permitted. Minimum 2 characters, starting with alphanumeric.")
 	}
 
 	existing, err := config.Load(ClusterFlagValue())

pkg/minikube/config/profile.go

@@ -90,8 +90,8 @@ func ProfileNameValid(name string) bool {
 	const RestrictedNamePattern = `(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])`
 
 	var validName = regexp.MustCompile(`^` + RestrictedNamePattern + `$`)
-
-	return validName.MatchString(name)
+	// length needs to be more than 1 character because docker volume #9366
+	return validName.MatchString(name) && len(name) > 1
 }
 
 // ProfileNameInReservedKeywords checks if the profile is an internal keywords

pkg/minikube/config/profile_test.go

@@ -80,10 +80,11 @@ func TestProfileNameValid(t *testing.T) {
 		"pro-file1":           true,
 		"1st-profile":         true,
 		"1st-2nd-3rd-profile": true,
-		"n":                   true,
-		"1":                   true,
 		"12567":               true,
+		"111":                 true,
 
+		"1":                false,
+		"n":                false,
 		"pro file":         false,
 		"pro-file-":        false,
 		"-profile":         false,