add CLI

signal/loadtest/README.md

@@ -17,6 +17,56 @@ Load testing tool for the NetBird signal server.
 
 ## Usage
 
+### Standalone Binary
+
+Build and run the load test as a standalone binary:
+
+```bash
+# Build the binary
+cd signal/loadtest/cmd/signal-loadtest
+go build -o signal-loadtest
+
+# Single message exchange
+./signal-loadtest \
+  -server http://localhost:10000 \
+  -pairs-per-sec 10 \
+  -total-pairs 100 \
+  -message-size 100
+
+# Continuous exchange for 30 seconds
+./signal-loadtest \
+  -server http://localhost:10000 \
+  -pairs-per-sec 10 \
+  -total-pairs 20 \
+  -message-size 200 \
+  -exchange-duration 30s \
+  -message-interval 200ms
+
+# Long-running test (10 minutes)
+./signal-loadtest \
+  -server http://localhost:10000 \
+  -pairs-per-sec 20 \
+  -total-pairs 50 \
+  -message-size 500 \
+  -exchange-duration 10m \
+  -message-interval 100ms \
+  -test-duration 15m \
+  -log-level debug
+
+# Show help
+./signal-loadtest -h
+```
+
+**Available Flags:**
+- `-server`: Signal server URL (default: `http://localhost:10000`)
+- `-pairs-per-sec`: Peer pairs created per second (default: 10)
+- `-total-pairs`: Total number of peer pairs (default: 100)
+- `-message-size`: Message size in bytes (default: 100)
+- `-test-duration`: Maximum test duration, 0 = unlimited (default: 0)
+- `-exchange-duration`: Continuous exchange duration per pair, 0 = single message (default: 0)
+- `-message-interval`: Interval between messages in continuous mode (default: 100ms)
+- `-log-level`: Log level: trace, debug, info, warn, error (default: info)
+
 ### Running Tests
 
 ```bash

signal/loadtest/cmd/signal-loadtest/integration_test.go

@@ -0,0 +1,128 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"os"
+	"os/exec"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	"go.opentelemetry.io/otel"
+	"google.golang.org/grpc"
+
+	"github.com/netbirdio/netbird/shared/signal/proto"
+	"github.com/netbirdio/netbird/signal/server"
+)
+
+func TestCLI_SingleMessage(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	grpcServer, serverAddr := startTestSignalServer(t, ctx)
+	defer grpcServer.Stop()
+
+	cmd := exec.Command("go", "run", "main.go",
+		"-server", serverAddr,
+		"-pairs-per-sec", "3",
+		"-total-pairs", "5",
+		"-message-size", "50",
+		"-log-level", "warn")
+
+	output, err := cmd.CombinedOutput()
+	require.NoError(t, err, "CLI should execute successfully")
+
+	outputStr := string(output)
+	require.Contains(t, outputStr, "Load Test Report")
+	require.Contains(t, outputStr, "Total Pairs Sent: 5")
+	require.Contains(t, outputStr, "Successful Exchanges: 5")
+	t.Logf("Output:\n%s", outputStr)
+}
+
+func TestCLI_ContinuousExchange(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skipping continuous exchange CLI test in short mode")
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	grpcServer, serverAddr := startTestSignalServer(t, ctx)
+	defer grpcServer.Stop()
+
+	cmd := exec.Command("go", "run", "main.go",
+		"-server", serverAddr,
+		"-pairs-per-sec", "2",
+		"-total-pairs", "3",
+		"-message-size", "100",
+		"-exchange-duration", "3s",
+		"-message-interval", "100ms",
+		"-log-level", "warn")
+
+	output, err := cmd.CombinedOutput()
+	require.NoError(t, err, "CLI should execute successfully")
+
+	outputStr := string(output)
+	require.Contains(t, outputStr, "Load Test Report")
+	require.Contains(t, outputStr, "Total Pairs Sent: 3")
+	require.Contains(t, outputStr, "Successful Exchanges: 3")
+	t.Logf("Output:\n%s", outputStr)
+}
+
+func TestCLI_InvalidConfig(t *testing.T) {
+	tests := []struct {
+		name string
+		args []string
+	}{
+		{
+			name: "negative pairs",
+			args: []string{"-pairs-per-sec", "-1"},
+		},
+		{
+			name: "zero total pairs",
+			args: []string{"-total-pairs", "0"},
+		},
+		{
+			name: "negative message size",
+			args: []string{"-message-size", "-100"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			args := append([]string{"run", "main.go"}, tt.args...)
+			cmd := exec.Command("go", args...)
+			output, err := cmd.CombinedOutput()
+			require.Error(t, err, "Should fail with invalid config")
+			require.Contains(t, string(output), "Configuration error")
+		})
+	}
+}
+
+func startTestSignalServer(t *testing.T, ctx context.Context) (*grpc.Server, string) {
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	require.NoError(t, err)
+
+	grpcServer := grpc.NewServer()
+
+	signalServer, err := server.NewServer(ctx, otel.Meter("cli-test"))
+	require.NoError(t, err)
+
+	proto.RegisterSignalExchangeServer(grpcServer, signalServer)
+
+	go func() {
+		if err := grpcServer.Serve(listener); err != nil {
+			t.Logf("Server stopped: %v", err)
+		}
+	}()
+
+	time.Sleep(100 * time.Millisecond)
+
+	return grpcServer, fmt.Sprintf("http://%s", listener.Addr().String())
+}
+
+func TestMain(m *testing.M) {
+	os.Exit(m.Run())
+}

signal/loadtest/cmd/signal-loadtest/main.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/signal/loadtest"
+)
+
+var (
+	serverURL        string
+	pairsPerSecond   int
+	totalPairs       int
+	messageSize      int
+	testDuration     time.Duration
+	exchangeDuration time.Duration
+	messageInterval  time.Duration
+	logLevel         string
+)
+
+func init() {
+	flag.StringVar(&serverURL, "server", "http://localhost:10000", "Signal server URL")
+	flag.IntVar(&pairsPerSecond, "pairs-per-sec", 10, "Number of peer pairs to create per second")
+	flag.IntVar(&totalPairs, "total-pairs", 100, "Total number of peer pairs to create")
+	flag.IntVar(&messageSize, "message-size", 100, "Size of test message in bytes")
+	flag.DurationVar(&testDuration, "test-duration", 0, "Maximum test duration (0 = unlimited)")
+	flag.DurationVar(&exchangeDuration, "exchange-duration", 0, "Duration for continuous message exchange per pair (0 = single message)")
+	flag.DurationVar(&messageInterval, "message-interval", 100*time.Millisecond, "Interval between messages in continuous mode")
+	flag.StringVar(&logLevel, "log-level", "info", "Log level (trace, debug, info, warn, error)")
+}
+
+func main() {
+	flag.Parse()
+
+	level, err := log.ParseLevel(logLevel)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Invalid log level: %v\n", err)
+		os.Exit(1)
+	}
+	log.SetLevel(level)
+
+	config := loadtest.LoadTestConfig{
+		ServerURL:        serverURL,
+		PairsPerSecond:   pairsPerSecond,
+		TotalPairs:       totalPairs,
+		MessageSize:      messageSize,
+		TestDuration:     testDuration,
+		ExchangeDuration: exchangeDuration,
+		MessageInterval:  messageInterval,
+	}
+
+	if err := validateConfig(config); err != nil {
+		fmt.Fprintf(os.Stderr, "Configuration error: %v\n", err)
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	log.Infof("Signal Load Test Configuration:")
+	log.Infof("  Server URL: %s", config.ServerURL)
+	log.Infof("  Pairs per second: %d", config.PairsPerSecond)
+	log.Infof("  Total pairs: %d", config.TotalPairs)
+	log.Infof("  Message size: %d bytes", config.MessageSize)
+	if config.TestDuration > 0 {
+		log.Infof("  Test duration: %v", config.TestDuration)
+	}
+	if config.ExchangeDuration > 0 {
+		log.Infof("  Exchange duration: %v", config.ExchangeDuration)
+		log.Infof("  Message interval: %v", config.MessageInterval)
+	} else {
+		log.Infof("  Mode: Single message exchange")
+	}
+	fmt.Println()
+
+	lt := loadtest.NewLoadTest(config)
+	if err := lt.Run(); err != nil {
+		log.Errorf("Load test failed: %v", err)
+		os.Exit(1)
+	}
+
+	metrics := lt.GetMetrics()
+	metrics.PrintReport()
+}
+
+func validateConfig(config loadtest.LoadTestConfig) error {
+	if config.ServerURL == "" {
+		return fmt.Errorf("server URL is required")
+	}
+	if config.PairsPerSecond <= 0 {
+		return fmt.Errorf("pairs-per-sec must be greater than 0")
+	}
+	if config.TotalPairs <= 0 {
+		return fmt.Errorf("total-pairs must be greater than 0")
+	}
+	if config.MessageSize <= 0 {
+		return fmt.Errorf("message-size must be greater than 0")
+	}
+	if config.MessageInterval <= 0 {
+		return fmt.Errorf("message-interval must be greater than 0")
+	}
+	return nil
+}

signal/loadtest/cmd/signal-loadtest/test.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -e
+
+echo "Building signal-loadtest binary..."
+go build -o signal-loadtest
+
+echo ""
+echo "=== Test 1: Single message exchange (5 pairs) ==="
+./signal-loadtest \
+  -server http://localhost:10000 \
+  -pairs-per-sec 5 \
+  -total-pairs 5 \
+  -message-size 50 \
+  -log-level info
+
+echo ""
+echo "=== Test 2: Continuous exchange (3 pairs, 5 seconds) ==="
+./signal-loadtest \
+  -server http://localhost:10000 \
+  -pairs-per-sec 3 \
+  -total-pairs 3 \
+  -message-size 100 \
+  -exchange-duration 5s \
+  -message-interval 200ms \
+  -log-level info
+
+echo ""
+echo "All tests completed!"