Function main

examples/features/csm_observability/client/main.go:51–88

()

)

func main() {
	flag.Parse()
	exporter, err := prometheus.New()
	if err != nil {
		log.Fatalf("Failed to start prometheus exporter: %v", err)
	}
	provider := metric.NewMeterProvider(metric.WithReader(exporter))
	go http.ListenAndServe(*prometheusEndpoint, promhttp.Handler())

	cleanup := csm.EnableObservability(context.Background(), opentelemetry.Options{MetricsOptions: opentelemetry.MetricsOptions{MeterProvider: provider}})
	defer cleanup()

	// Set up xds credentials that fall back to insecure as described in:
	// https://cloud.google.com/service-mesh/docs/service-routing/security-proxyless-setup#workloads_are_unable_to_communicate_in_the_security_setup.
	creds, err := xdscreds.NewClientCredentials(xdscreds.ClientOptions{FallbackCreds: insecure.NewCredentials()})
	if err != nil {
		log.Fatalf("Failed to create xDS credentials: %v", err)
	}
	cc, err := grpc.NewClient(*target, grpc.WithTransportCredentials(creds))
	if err != nil {
		log.Fatalf("Failed to start NewClient: %v", err)
	}
	defer cc.Close()
	c := pb.NewGreeterClient(cc)

	// Make an RPC every second. This should trigger telemetry to be emitted from
	// the client and the server.
	for {
		ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
		r, err := c.SayHello(ctx, &pb.HelloRequest{Name: *name})
		if err != nil {
			log.Fatalf("Could not greet: %v", err)
		}
		fmt.Println(r)
		time.Sleep(time.Second)
		cancel()
	}
}