c.PersistentFlags().StringVar(&serverArgs.ServerOptions.HTTPSAddr, "httpsAddr", ":15017",
		"Injection and validation service HTTPS address")
	c.PersistentFlags().StringVar(&serverArgs.ServerOptions.GRPCAddr, "grpcAddr", ":15010",
		"Discovery service gRPC address")
	c.PersistentFlags().StringVar(&serverArgs.ServerOptions.SecureGRPCAddr, "secureGRPCAddr", ":15012",
		"Discovery service secured gRPC address")

				p.Namespace = "istio-system"
				p.ServerOptions = DiscoveryServerOptions{
					// Dynamically assign all ports.
					HTTPAddr:       ":0",
					MonitoringAddr: ":0",
					GRPCAddr:       ":0",
					SecureGRPCAddr: ":0",
					TLSOptions:     *c.tlsOptions,
				}
				p.RegistryOptions = RegistryOptions{
					FileDir: configDir,
				}

				p.ShutdownDuration = 1 * time.Millisecond

	if err := s.httpServer.Serve(listener); err != nil {
		log.Fatalf("Failed to start HTTP server: %v", err)
	}
}

func (s *ExtAuthzServer) run(httpAddr, grpcAddr string) {
	var wg sync.WaitGroup
	wg.Add(2)
	go s.startHTTP(httpAddr, &wg)
	go s.startGRPC(grpcAddr, &wg)
	wg.Wait()
}

func (s *ExtAuthzServer) stop() {
	s.grpcServer.Stop()
	log.Printf("GRPC server stopped")

	// terminate TLS instead.
	HTTPSAddr string

	// The listening address for gRPC. If the port in the address is empty or "0" (as in "127.0.0.1:" or "[::1]:0")
	// a port number is automatically chosen.
	GRPCAddr string

	// The listening address for the monitoring port. If the port in the address is empty or "0" (as in "127.0.0.1:" or "[::1]:0")
	// a port number is automatically chosen.
	MonitoringAddr string

// initServers initializes http and grpc servers
func (s *Server) initServers(args *PilotArgs) {
	s.initGrpcServer(args.KeepaliveOptions)
	multiplexGRPC := false
	if args.ServerOptions.GRPCAddr != "" {
		s.grpcAddress = args.ServerOptions.GRPCAddr
	} else {
		// This happens only if the GRPC port (15010) is disabled. We will multiplex
		// it on the HTTP port. Does not impact the HTTPS gRPC or HTTPS.