feat: load configuration from Environment variables

Signed-off-by: Roland.Ma <rolandma@yunify.com>

pkg/apiserver/config/config.go

@@ -141,6 +141,11 @@ func TryLoadFromDisk() (*Config, error) {
 	// Load from current working directory, only used for debugging
 	viper.AddConfigPath(".")
 
+	// Load from Environment variables
+	viper.SetEnvPrefix("kubesphere")
+	viper.AutomaticEnv()
+	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+
 	if err := viper.ReadInConfig(); err != nil {
 		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
 			return nil, err

pkg/apiserver/config/config_test.go

@@ -85,7 +85,7 @@ func newTestConfig() (*Config, error) {
 		RedisOptions: &cache.Options{
 			Host:     "localhost",
 			Port:     6379,
-			Password: "P@88w0rd",
+			Password: "KUBESPHERE_REDIS_PASSWORD",
 			DB:       0,
 		},
 		S3Options: &s3.Options{
@@ -216,6 +216,9 @@ func TestGet(t *testing.T) {
 	saveTestConfig(t, conf)
 	defer cleanTestConfig(t)
 
+	conf.RedisOptions.Password = "P@88w0rd"
+	os.Setenv("KUBESPHERE_REDIS_PASSWORD", "P@88w0rd")
+
 	conf2, err := TryLoadFromDisk()
 	if err != nil {
 		t.Fatal(err)