cmd/strelaysrv: Add profiling support, default disabled

cmd/strelaysrv/main.go

@@ -81,6 +81,8 @@ var (
 	natLease   int
 	natRenewal int
 	natTimeout int
+
+	pprofEnabled bool
 )
 
 func main() {
@@ -105,6 +107,7 @@ func main() {
 	flag.IntVar(&natLease, "nat-lease", 60, "NAT lease length in minutes")
 	flag.IntVar(&natRenewal, "nat-renewal", 30, "NAT renewal frequency in minutes")
 	flag.IntVar(&natTimeout, "nat-timeout", 10, "NAT discovery timeout in seconds")
+	flag.BoolVar(&pprofEnabled, "pprof", false, "Enable the built in profiling on the status server")
 	flag.Parse()
 
 	if extAddress == "" {

cmd/strelaysrv/status.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"log"
 	"net/http"
+	"net/http/pprof"
 	"runtime"
 	"sync/atomic"
 	"time"
@@ -18,6 +19,9 @@ func statusService(addr string) {
 
 	handler := http.NewServeMux()
 	handler.HandleFunc("/status", getStatus)
+	if pprofEnabled {
+		handler.HandleFunc("/debug/pprof/", pprof.Index)
+	}
 
 	srv := http.Server{
 		Addr:        addr,