add option to start http server for profiling

cli/flags.go

@@ -139,6 +139,18 @@ var (
 			EnvVars: []string{"CONFIG_FILE"},
 		},
 
+		&cli.BoolFlag{
+			Name:    "enable-profiling",
+			Usage:   "enables the go http profiling endpoints",
+			EnvVars: []string{"ENABLE_PROFILING"},
+		},
+		&cli.StringFlag{
+			Name:    "profiling-address",
+			Usage:   "specify ip address and port the profiling server should listen on",
+			EnvVars: []string{"PROFILING_ADDRESS"},
+			Value:   "localhost:9999",
+		},
+
 		// ############################
 		// ### ACME Client Settings ###
 		// ############################

server/profiling.go

@@ -0,0 +1,18 @@
+package server
+
+import (
+	"log"
+	"net/http"
+	_ "net/http/pprof"
+)
+
+func StartProfilingServer(listeningAddress string) {
+	server := &http.Server{
+		Addr:    listeningAddress,
+		Handler: http.DefaultServeMux,
+	}
+
+	go func() {
+		log.Fatal(server.ListenAndServe())
+	}()
+}

server/startup.go

@@ -3,7 +3,6 @@ package server
 import (
 	"context"
 	"crypto/tls"
-	"encoding/json"
 	"fmt"
 	"net"
 	"net/http"
@@ -43,9 +42,6 @@ func Serve(ctx *cli.Context) error {
 	}
 	log.Logger = zerolog.New(zerolog.ConsoleWriter{Out: os.Stderr}).With().Timestamp().Logger().Level(logLevel)
 
-	foo, _ := json.Marshal(cfg)
-	log.Trace().RawJSON("config", foo).Msg("starting server with config")
-
 	listeningSSLAddress := fmt.Sprintf("%s:%d", cfg.Server.Host, cfg.Server.Port)
 	listeningHTTPAddress := fmt.Sprintf("%s:%d", cfg.Server.Host, cfg.Server.HttpPort)
 
@@ -133,6 +129,10 @@ func Serve(ctx *cli.Context) error {
 		}()
 	}
 
+	if ctx.IsSet("enable-profiling") {
+		StartProfilingServer(ctx.String("profiling-address"))
+	}
+
 	// Create ssl handler based on settings
 	sslHandler := handler.Handler(cfg.Server, giteaClient, dnsLookupCache, canonicalDomainCache, redirectsCache)