Add configuration for turning profiling on/off

Signed-off-by: Vladislav Byrgazov <vladislav.byrgazov@xored.com>

README.md

@@ -38,6 +38,8 @@ docker build .
 * `NSM_FORWARDER_NETWORK_SERVICE_NAME` - the default service name for forwarder discovering (default: "forwarder")
 * `NSM_OPEN_TELEMETRY_ENDPOINT`        - OpenTelemetry Collector Endpoint (default: "otel-collector.observability.svc.cluster.local:4317")
 * `NSM_METRICS_EXPORT_INTERVAL`        - interval between mertics exports (default: "10s")
+* `NSM_PPROF_ENABLED`                  - is pprof enabled (default: "false")
+* `NSM_PPROF_PORT`                     - pprof port (default: "6060")
 
 # Testing
 

internal/config/config.go

@@ -37,4 +37,6 @@ type Config struct {
 	ForwarderNetworkServiceName string        `default:"forwarder" desc:"the default service name for forwarder discovering" split_words:"true"`
 	OpenTelemetryEndpoint       string        `default:"otel-collector.observability.svc.cluster.local:4317" desc:"OpenTelemetry Collector Endpoint" split_words:"true"`
 	MetricsExportInterval       time.Duration `default:"10s" desc:"interval between mertics exports" split_words:"true"`
+	PprofEnabled                bool          `default:"false" desc:"is pprof enabled" split_words:"true"`
+	PprofPort                   string        `default:"6060" desc:"pprof port" split_words:"true"`
 }

main.go

@@ -1,7 +1,7 @@
-// Copyright (c) 2020-2023 Cisco and/or its affiliates.
-//
 // Copyright (c) 2021-2023 Doc.ai and/or its affiliates.
 //
+// Copyright (c) 2020-2024 Cisco and/or its affiliates.
+//
 // SPDX-License-Identifier: Apache-2.0
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -20,9 +20,12 @@ package main
 
 import (
 	"context"
+	"net/http"
+	"net/http/pprof"
 	"os"
 	"os/signal"
 	"syscall"
+	"time"
 
 	"github.com/kelseyhightower/envconfig"
 	"github.com/sirupsen/logrus"
@@ -88,6 +91,28 @@ func main() {
 		}()
 	}
 
+	// Configure pprof
+	if cfg.PprofEnabled {
+		log.FromContext(ctx).Infof("Profiler is enabled. Listening on %s", cfg.PprofPort)
+		mux := http.NewServeMux()
+		mux.HandleFunc("/debug/pprof/", pprof.Index)
+		mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
+		mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
+		mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
+		mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
+		server := &http.Server{
+			Addr:         "localhost:" + cfg.PprofPort,
+			Handler:      mux,
+			ReadTimeout:  10 * time.Second,
+			WriteTimeout: 10 * time.Second,
+		}
+		go func() {
+			if err = server.ListenAndServe(); err != nil {
+				log.FromContext(ctx).Errorf("Failed to start profiler: %s", err.Error())
+			}
+		}()
+	}
+
 	err = manager.RunNsmgr(ctx, cfg)
 	if err != nil {
 		log.FromContext(ctx).Fatalf("error executing rootCmd: %v", err)