add metrics to config.

internal/config/server.go

@@ -8,12 +8,13 @@ import (
 )
 
 type Server struct {
-	Cert   string
+	Cert    string
-	Key    string
+	Key     string
-	Bind   string
+	Bind    string
-	Static string
+	Static  string
-	PProf  bool
+	PProf   bool
-	CORS   []string
+	Metrics bool
+	CORS    []string
 }
 
 func (Server) Init(cmd *cobra.Command) error {
@@ -42,6 +43,11 @@ func (Server) Init(cmd *cobra.Command) error {
 		return err
 	}
 
+	cmd.PersistentFlags().Bool("server.metrics", true, "enable prometheus metrics available at /metrics")
+	if err := viper.BindPFlag("server.metrics", cmd.PersistentFlags().Lookup("server.metrics")); err != nil {
+		return err
+	}
+
 	cmd.PersistentFlags().StringSlice("server.cors", []string{"*"}, "list of allowed origins for CORS")
 	if err := viper.BindPFlag("server.cors", cmd.PersistentFlags().Lookup("server.cors")); err != nil {
 		return err
@@ -56,6 +62,7 @@ func (s *Server) Set() {
 	s.Bind = viper.GetString("server.bind")
 	s.Static = viper.GetString("server.static")
 	s.PProf = viper.GetBool("server.pprof")
+	s.Metrics = viper.GetBool("server.metrics")
 
 	s.CORS = viper.GetStringSlice("server.cors")
 	in, _ := utils.ArrayIn("*", s.CORS)

internal/http/manager.go

@@ -47,10 +47,12 @@ func New(WebSocketManager types.WebSocketManager, ApiManager types.ApiManager, c
 		return err
 	})
 
-	router.Get("/metrics", func(w http.ResponseWriter, r *http.Request) error {
+	if config.Metrics {
-		promhttp.Handler().ServeHTTP(w, r)
+		router.Get("/metrics", func(w http.ResponseWriter, r *http.Request) error {
-		return nil
+			promhttp.Handler().ServeHTTP(w, r)
-	})
+			return nil
+		})
+	}
 
 	if config.Static != "" {
 		fs := http.FileServer(http.Dir(config.Static))