Add an image with profiling enabled.

Signed-off-by: Vitaliy Guschin <vitaliy.guschin@spirent.com>

.github/workflows/release.yml

@@ -40,6 +40,7 @@ jobs:
     uses: networkservicemesh/.github/.github/workflows/docker-release.yaml@main
     with:
       tag: ${{ needs.get-tag.outputs.tag }}
+      build_with_profiler: true
     secrets:
       token: ${{ secrets.GITHUB_TOKEN }}
 

Dockerfile

@@ -3,20 +3,24 @@ ENV GO111MODULE=on
 ENV CGO_ENABLED=0
 ENV GOBIN=/bin
 ARG BUILDARCH=amd64
+ARG ENABLE_PROFILER=false
 RUN go install github.com/go-delve/delve/cmd/dlv@v1.8.2
 RUN go install github.com/grpc-ecosystem/grpc-health-probe@v0.4.25
 ADD https://github.com/spiffe/spire/releases/download/v1.8.0/spire-1.8.0-linux-${BUILDARCH}-musl.tar.gz .
 RUN tar xzvf spire-1.8.0-linux-${BUILDARCH}-musl.tar.gz -C /bin --strip=2 spire-1.8.0/bin/spire-server spire-1.8.0/bin/spire-agent
 
-
 FROM go as build
 WORKDIR /build
 COPY go.mod go.sum ./
 COPY ./local ./local
 COPY ./internal/imports ./internal/imports
 RUN go build ./internal/imports
 COPY . .
-RUN go build -o /bin/nsmgr .
+RUN if [ "$ENABLE_PROFILER" = "true" ]; then \
+    go build -tags profiler -o /bin/nsmgr . ; \
+    else \
+    go build -o /bin/nsmgr . ; \
+    fi
 
 FROM build as test
 CMD go test -test.v ./...

README.md

@@ -38,6 +38,7 @@ 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_PROFILER_HTTP_PORT`             - Profiling server HTTP port providing data in the format expected by the pprof visualization tool. Profiler is running only on images with the "-pprof" tag suffix (default: "6060")
 
 # Testing
 

internal/config/config.go

@@ -37,4 +37,5 @@ 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"`
+	ProfilerHTTPPort            uint16        `default:"6060" desc:"Profiling server HTTP port providing data in the format expected by the pprof visualization tool. Profiler is running only on images with the '-pprof' tag suffix" split_words:"true"`
 }

internal/imports/imports_linux.go

@@ -55,6 +55,8 @@ import (
 	_ "google.golang.org/grpc/health/grpc_health_v1"
 	_ "google.golang.org/grpc/peer"
 	_ "net"
+	_ "net/http"
+	_ "net/http/pprof"
 	_ "net/url"
 	_ "os"
 	_ "os/signal"

main.go

@@ -2,6 +2,8 @@
 //
 // Copyright (c) 2021-2023 Doc.ai and/or its affiliates.
 //
+// Copyright (c) 2024 Pragmagic Inc. and/or its affiliates.
+//
 // SPDX-License-Identifier: Apache-2.0
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -75,6 +77,9 @@ func main() {
 	logrus.SetLevel(level)
 	log.EnableTracing(true)
 
+	// Start profiling server
+	startProfiler(ctx, cfg.ProfilerHTTPPort)
+
 	// Configure Open Telemetry
 	if opentelemetry.IsEnabled() {
 		collectorAddress := cfg.OpenTelemetryEndpoint

profiler_off.go

@@ -0,0 +1,7 @@
+//go:build !profiler
+
+package main
+
+import "context"
+
+func startProfiler(ctx context.Context, profilerHTTPPort uint16) {}

profiler_on.go

@@ -0,0 +1,31 @@
+//go:build profiler
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	_ "net/http/pprof" // #nosec
+	"time"
+
+	"github.com/networkservicemesh/sdk/pkg/tools/log"
+)
+
+func startProfiler(ctx context.Context, profilerHTTPPort uint16) {
+	go func() {
+		log.FromContext(ctx).Infof("Profiler is enabled. Starting HTTP server on %d", profilerHTTPPort)
+
+		address := fmt.Sprintf("localhost:%d", profilerHTTPPort)
+
+		server := &http.Server{
+			Addr:         address,
+			ReadTimeout:  10 * time.Second,
+			WriteTimeout: 10 * time.Second,
+		}
+
+		if err := server.ListenAndServe(); err != nil {
+			log.FromContext(ctx).Errorf("Failed to start profiler: %s", err.Error())
+		}
+	}()
+}