Junwhan Ahn <******@****.***> 1690253399 -0700

// mechanism.
func (ctrl *PersistentVolumeController) unbindVolume(ctx context.Context, volume *v1.PersistentVolume) error {
	logger := klog.FromContext(ctx)
	logger.V(4).Info("Updating PersistentVolume: rolling back binding from claim", "PVC", klog.KRef(volume.Spec.ClaimRef.Namespace, volume.Spec.ClaimRef.Name), "volumeName", volume.Name)

	// Save the PV only when any modification is necessary.
	volumeClone := volume.DeepCopy()

- Revised the logic for DaemonSet rolling update to exclude nodes if scheduling constraints are not met.

          "rollingUpdate": {
            "allOf": [
              {
                "$ref": "#/components/schemas/io.k8s.api.apps.v1.RollingUpdateDaemonSet"
              }
            ],
            "description": "Rolling update config params. Present only if type = \"RollingUpdate\"."
          },
          "type": {
            "description": "Type of daemon set update. Can be \"RollingUpdate\" or \"OnDelete\". Default is RollingUpdate.",

#
# Args:
# $1 master env (kube-env of master; result of calling get-master-env)
# $2 env key to use
function get-env-val() {
  local match
  match=$( (echo "${1}" | grep -E "^${2}:") || echo '')
  if [[ -z "${match}" ]]; then
    echo ""
  fi
  echo "${match}" | cut -d : -f 2 | cut -d \' -f 2
}

# Load the master env by calling get-master-env, and extract important values

org.gradle.tooling.internal.provider.DefaultConnection...

- Revised the logic for DaemonSet rolling update to exclude nodes if scheduling constraints are not met.

// Multiple observed events may collapse to a single invocation of eventHandler().
//
// eventHandler() is invoked immediately after successful initialization of the filesystem watch,
// in case the path changed concurrent with calling WatchUntil().
func WatchUntil(ctx context.Context, pollInterval time.Duration, path string, eventHandler func(), errorHandler func(err error)) {
	if pollInterval <= 0 {
		panic(fmt.Errorf("pollInterval must be > 0"))
	}

- Revised the logic for DaemonSet rolling update to exclude nodes if scheduling constraints are not met.

	// Per https://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html#tag_16_357_03:
	//
	// - “If O_NONBLOCK is clear, an open() for reading-only shall block the
	//   calling thread until a thread opens the file for writing. An open() for
	//   writing-only shall block the calling thread until a thread opens the file
	//   for reading.”
	//
	// In order to unblock both open calls, we open the two ends of the FIFO