Make metrics endpoint configurable

apiary.toml

@@ -35,6 +35,9 @@ ThrottleSpeed = 10240.0
 # Must be either "DEBUG", "INFO", "WARN", "ERROR", "FATAL", "NONE"
 # Default: "INFO"
 LogLevel = "INFO"
+# Enable metrics endpoint
+# Default: false
+MetricsEnable = false
 # Enable access logging
 # Default: true
 AccessLogEnable = true

config/config.go

@@ -34,6 +34,7 @@ type HoneypotConfig struct {
 type FrontendConfig struct {
 	ListenAddr             string                 `toml:"ListenAddr"`
 	LogLevel               string                 `toml:"LogLevel"`
+	MetricsEnable          bool                   `toml:"MetricsEnable"`
 	AccessLogEnable        bool                   `toml:"AccessLogEnable"`
 	AccessLogIgnoreMetrics bool                   `toml:"AccessLogIgnoreMetrics"`
 	Autocert               FrontendAutocertConfig `toml:"Autocert"`

web/server.go

@@ -86,10 +86,12 @@ func NewServer(cfg config.FrontendConfig, hs *ssh.HoneypotServer, store store.Lo
 	r.Use(middleware.RealIP)
 	r.Use(middleware.RequestID)
 	r.Use(s.LoggingMiddleware)
-	r.Use(NewMetricsMiddleware())
 	r.Use(middleware.SetHeader("Server", fmt.Sprintf("apiary/%s", apiary.FullVersion())))
 
-	r.Handle("/metrics", promhttp.Handler())
+	if cfg.MetricsEnable {
+		r.Use(NewMetricsMiddleware())
+		r.Handle("/metrics", promhttp.Handler())
+	}
 	r.Route("/", func(r chi.Router) {
 		r.Get("/*", s.IndexHandler("web/vue-frontend/dist"))
 		r.Get("/stream", s.HandlerAttemptStream)