e.workLock.Lock()
	defer e.workLock.Unlock()

	ns := a.attributes.GetNamespace()
	// this Add can trigger a Get BEFORE the work is added to a list, but this is ok because the getWork routine
	// waits the worklock before retrieving the work to do, so the writes in this method will be observed
	e.queue.Add(ns)

	if e.inProgress.Has(ns) {
		e.dirtyWork[ns] = append(e.dirtyWork[ns], a)
		return
	}

  // operation (because it implements the CSI ControllerPublishVolume()
  // method), and that the Kubernetes attach detach controller should call
  // the attach volume interface which checks the volumeattachment status
  // and waits until the volume is attached before proceeding to mounting.
  // The CSI external-attacher coordinates with CSI volume driver and updates
  // the volumeattachment status when the attach operation is complete.

  // operation (because it implements the CSI ControllerPublishVolume()
  // method), and that the Kubernetes attach detach controller should call
  // the attach volume interface which checks the volumeattachment status
  // and waits until the volume is attached before proceeding to mounting.
  // The CSI external-attacher coordinates with CSI volume driver and updates
  // the volumeattachment status when the attach operation is complete.

	// /readyz must return an error, but we need to give it some time
	err := wait.PollImmediate(100*time.Millisecond, wait.ForeverTestTimeout, func() (done bool, err error) {
		resultGot := doer.Do(newClient(true), func(httptrace.GotConnInfo) {}, "/readyz", time.Second)
		// wait until we have a non 200 response
		if resultGot.response != nil && resultGot.response.StatusCode == http.StatusOK {

			log.Infof("fail to write debug response: %v", err)
			return
		}
	}
}

// initDebugInterface() listens on localhost:${PORT} for path /debug/...
// forwards the paths to Istiod as xDS requests
// waits for response from Istiod, sends it as JSON
func (p *XdsProxy) initDebugInterface(port int) error {
	p.tapResponseChannel = make(chan *discovery.DiscoveryResponse)

	tapGrpcHandler, err := NewTapGrpcHandler(p)

		}

		// Backoff parameters tuned to retry over 140 seconds. Will fail and restart the Kubelet
		// after max retry steps.
		initBackoff := wait.Backoff{
			Steps:    6,
			Duration: 15 * time.Millisecond,
			Factor:   6.0,
			Jitter:   0.1,
		}
		err = wait.ExponentialBackoff(initBackoff, func() (bool, error) {
			klog.V(4).Infof("Initializing migrated drivers on CSINode")

	// operation (because it implements the CSI ControllerPublishVolume()
	// method), and that the Kubernetes attach detach controller should call
	// the attach volume interface which checks the volumeattachment status
	// and waits until the volume is attached before proceeding to mounting.
	// The CSI external-attacher coordinates with CSI volume driver and updates
	// the volumeattachment status when the attach operation is complete.

	// operation (because it implements the CSI ControllerPublishVolume()
	// method), and that the Kubernetes attach detach controller should call
	// the attach volume interface which checks the volumeattachment status
	// and waits until the volume is attached before proceeding to mounting.
	// The CSI external-attacher coordinates with CSI volume driver and updates
	// the volumeattachment status when the attach operation is complete.

	}()

	// wait for all in-flight non-long running requests to finish
	nonLongRunningRequestDrainedCh := make(chan struct{})
	go func() {
		defer close(nonLongRunningRequestDrainedCh)
		defer klog.V(1).Info("[graceful-termination] in-flight non long-running request(s) have drained")

		// wait for the delayed stopCh before closing the handler chain (it rejects everything after Wait has been called).

	// operation (because it implements the CSI ControllerPublishVolume()
	// method), and that the Kubernetes attach detach controller should call
	// the attach volume interface which checks the volumeattachment status
	// and waits until the volume is attached before proceeding to mounting.
	// The CSI external-attacher coordinates with CSI volume driver and updates
	// the volumeattachment status when the attach operation is complete.