feat(go): add 100k ingest hardening baseline

go/vehicle-gateway/cmd/load-sim/main.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/loadsim"
+)
+
+func main() {
+	log.SetFlags(log.LstdFlags | log.Lmicroseconds)
+	flagCfg := loadsim.RegisterFlags(flag.CommandLine)
+	if err := flag.CommandLine.Parse(os.Args[1:]); err != nil {
+		log.Fatal(err)
+	}
+	cfg, err := flagCfg.Build()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+
+	log.Printf("load simulation started protocol=%s addr=%s connections=%d connect_rate=%d send_interval=%s duration=%s template=%s",
+		cfg.Protocol, cfg.Addr, cfg.Connections, cfg.ConnectRatePerSecond, cfg.SendInterval, cfg.Duration, cfg.Template)
+	stats, err := (loadsim.Runner{}).Run(ctx, cfg)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Print(formatStats(stats))
+}
+
+func formatStats(stats loadsim.Stats) string {
+	return fmt.Sprintf("connections_opened=%d connections_failed=%d frames_written=%d write_errors=%d",
+		stats.ConnectionsOpened,
+		stats.ConnectionsFailed,
+		stats.FramesWritten,
+		stats.WriteErrors,
+	)
+}