log.FindScope("default").SetOutputLevel(log.DebugLevel)
	log.Debug("debug log")
	log.Info("info log")
	log.Warn("warn log")
	log.Error("error log")
	// This will error because stdout cannot sync, but the UDS part should sync
	// Ideally we would fail if the UDS part fails but the error library makes it kind of tricky
	_ = log.Sync()

	// Restore os stdout.
	os.Stdout = stdout
	assert.NoError(t, log.Configure(loggingOptions))

}

func (s *NetServer) Start(ctx context.Context) {
	log.Debug("starting ztunnel server")
	go s.ztunnelServer.Run(ctx)
}

func (s *NetServer) Stop() {
	log.Debug("removing host iptables rules")
	s.iptablesConfigurator.DeleteHostRules()

	log.Debug("destroying host ipset")
	s.hostsideProbeIPSet.Flush()
	if err := s.hostsideProbeIPSet.DestroySet(); err != nil {
		log.Warnf("could not destroy host ipset on shutdown")
	}

	log := log.WithLabels("ns", pod.Namespace, "name", pod.Name)
	err := s.netServer.RemovePodFromMesh(ctx, pod)
	if err != nil {
		log.Errorf("failed to remove pod from mesh: %v", err)
		return err
	}
	log.Debug("removing annotation from pod")
	err = util.AnnotateUnenrollPod(s.kubeClient, &pod.ObjectMeta)
	if err != nil {
		log.Errorf("failed to annotate pod unenrollment: %v", err)
	}

		return fmt.Errorf("get netns: %v", err)
	}
	log = log.WithLabels("netns", netns)

	if err := redirectRunningPod(pod, netns); err != nil {
		log.Errorf("failed to setup redirection: %v", err)
		m.With(resultLabel.Value(resultFail)).Increment()
		return err
	}
	c.repairedPods[key] = pod.UID
	log.Infof("pod repaired")
	m.With(resultLabel.Value(resultSuccess)).Increment()
	return nil

	"github.com/spf13/cobra"
	"github.com/spf13/pflag"
)

var helpFlags = map[string]bool{
	"log_as_json":          true,
	"log_stacktrace_level": true,
	"log_target":           true,
	"log_caller":           true,
	"log_output_level":     true,
	// istioctl also inherits support for log_rotate, log_rotate_max_age, log_rotate_max_backups,
	// log_rotate_max_size, but these are rarely appropriate for a user-facing CLI so we ignore them
}

				Type:      unix.RTN_LOCAL,
				Table:     RouteTableInbound,
				LinkIndex: loopbackLink.Attrs().Index,
			},
		}

		for _, route := range netlinkRoutes {
			log.Debugf("Iterating netlink route : %+v", route)
			if err := f(route); err != nil {
				log.Errorf("Failed to add netlink route : %+v", route)
				return fmt.Errorf("failed to add route: %v", err)
			}
		}
	}
	return nil

	// Some config can be passed in a kubeconfig file
	kubeconfig := conf.Kubernetes.Kubeconfig

	config, err := kube.DefaultRestConfig(kubeconfig, "")
	if err != nil {
		log.Errorf("Failed setting up kubernetes client with kubeconfig %s", kubeconfig)
		return nil, err
	}

	log.Debugf("istio-cni set up kubernetes client with kubeconfig %s", kubeconfig)

	// Create the client
	return kubernetes.NewForConfig(config)
}

	LoggingOptions = defaultLogOptions()

	// scope is for dev logging.  Warning: log levels are not set by --log_output_level until command is Run().
	Scope = log.RegisterScope("cli", "istioctl")
)

func defaultLogOptions() *log.Options {
	o := log.DefaultOptions()
	// Default to warning for everything; we usually don't want logs in istioctl
	o.SetDefaultOutputLevel("all", log.WarnLevel)
	// These scopes are too noisy even at warning level

}

func Execute(cmd string, args ...string) error {
	log.Debugf("Running command: %s %s", cmd, strings.Join(args, " "))
	externalCommand := exec.Command(cmd, args...)
	stdout := &bytes.Buffer{}
	stderr := &bytes.Buffer{}
	externalCommand.Stdout = stdout
	externalCommand.Stderr = stderr

	err := externalCommand.Run()

	if len(stdout.String()) != 0 {
		log.Debugf("Command output: \n%v", stdout.String())
	}

				if err := file.AtomicCopy(filepath.Join("testdata", c.invalidConfigFilename), tempDir, c.cniConfigFilename); err != nil {
					t.Fatal(err)
				}
			}

			t.Log("Expecting an invalid configuration log:")
			err := in.sleepWatchInstall(ctx, sets.String{})
			if err != nil {
				t.Fatalf("error should be nil due to invalid config, got: %v", err)
			}
			assert.Equal(t, isReady.Load(), false)