add validations --image-repository inputs

cmd/minikube/cmd/start.go

@@ -1088,6 +1088,10 @@ func validateFlags(cmd *cobra.Command, drvName string) {
 		validateListenAddress(viper.GetString(listenAddress))
 	}
 
+	if cmd.Flags().Changed(imageRepository) {
+		viper.Set(imageRepository, validateImageRepository(viper.GetString(imageRepository)))
+	}
+
 	if cmd.Flags().Changed(containerRuntime) {
 		runtime := strings.ToLower(viper.GetString(containerRuntime))
 
@@ -1208,6 +1212,30 @@ func validateRegistryMirror() {
 	}
 }
 
+// This function validates if the --image-repository
+// args match the format of registry.cn-hangzhou.aliyuncs.com/google_containers
+func validateImageRepository(imagRepo string) (vaildImageRepo string) {
+
+	if strings.ToLower(imagRepo) == "auto" {
+		vaildImageRepo = "auto"
+	}
+	URL, err := url.Parse(imagRepo)
+	if err != nil {
+		klog.Errorln("Error Parsing URL: ", err)
+	}
+	// tips when imagRepo ended with a trailing /.
+	if strings.HasSuffix(imagRepo, "/") {
+		out.Infof("The --image-repository flag your provided ended with a trailing / that could cause conflict in kuberentes, removed automatically")
+	}
+	// tips when imageRepo started with scheme.
+	if URL.Scheme != "" {
+		out.Infof("The --image-repository flag your provided contains Scheme: {{.scheme}}, it will be as a domian, removed automatically", out.V{"scheme": URL.Scheme})
+	}
+
+	vaildImageRepo = URL.Hostname() + strings.TrimSuffix(URL.Path, "/")
+	return
+}
+
 // This function validates if the --listen-address
 // match the format 0.0.0.0
 func validateListenAddress(listenAddr string) {

cmd/minikube/cmd/start_test.go

@@ -311,3 +311,46 @@ func TestBaseImageFlagDriverCombo(t *testing.T) {
 		})
 	}
 }
+
+func TestValidateImageRepository(t *testing.T) {
+	var tests = []struct {
+		imageRepository      string
+		vaildImageRepository string
+	}{
+		{
+			imageRepository:      "auto",
+			vaildImageRepository: "auto",
+		},
+		{
+			imageRepository:      "http://registry.test.com/google_containers/",
+			vaildImageRepository: "registry.test.com/google_containers",
+		},
+		{
+			imageRepository:      "https://registry.test.com/google_containers/",
+			vaildImageRepository: "registry.test.com/google_containers",
+		},
+		{
+			imageRepository:      "registry.test.com/google_containers/",
+			vaildImageRepository: "registry.test.com/google_containers",
+		},
+		{
+			imageRepository:      "http://registry.test.com/google_containers",
+			vaildImageRepository: "registry.test.com/google_containers",
+		},
+		{
+			imageRepository:      "https://registry.test.com/google_containers",
+			vaildImageRepository: "registry.test.com/google_containers",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.imageRepository, func(t *testing.T) {
+			vaildImageRepository := validateImageRepository(test.imageRepository)
+			if vaildImageRepository != test.vaildImageRepository {
+				t.Errorf("validateImageRepository(imageRepo=%v): got %v, expected %v",
+					test.imageRepository, vaildImageRepository, test.vaildImageRepository)
+			}
+		})
+	}
+
+}