// unallocated port or a port out of the range is a no-op and
// returns no error.
func (r *PortAllocator) Release(port int) error {
	ok, offset := r.contains(port)
	if !ok {
		klog.Warningf("port is not in the range when release it. port: %v", port)
		return nil
	}

	err := r.alloc.Release(offset)
	if err == nil {
		// update metrics
		r.metrics.setAllocated(r.Used())

	mountOptions := util.MountOptionFromSpec(spec, options...)
	err = dm.mounter.FormatAndMount(devicePath, deviceMountPath, fstype, mountOptions)
	if err != nil {
		if rmErr := os.Remove(deviceMountPath); rmErr != nil {
			klog.Warningf("local: failed to remove %s: %v", deviceMountPath, rmErr)
		}
		return fmt.Errorf("local: failed to mount device %s at %s (fstype: %s), error %w", devicePath, deviceMountPath, fstype, err)
	}

	switch {
	case errors.IsNotFound(err):
		// ignore, authConfigMap is nil now
		return nil
	case errors.IsForbidden(err):
		klog.Warningf("Unable to get configmap/%s in %s.  Usually fixed by "+
			"'kubectl create rolebinding -n %s ROLEBINDING_NAME --role=%s --serviceaccount=YOUR_NS:YOUR_SA'",

	}
	// If the current API Server location on disk doesn't match the expected API server, show a warning
	if currentConfig.Clusters[currentCluster].Server != config.Clusters[expectedCluster].Server {
		klog.Warningf("a kubeconfig file %q exists already but has an unexpected API Server URL: expected: %s, got: %s",

			}
			// If the mount path could not be found, don't fail the unmount, but instead log a warning and proceed,
			// using the value from deviceToDetach.DeviceMountPath, so that the device can be marked as unmounted
			deviceMountPath = deviceToDetach.DeviceMountPath
			klog.Warningf(deviceToDetach.GenerateMsgDetailed(fmt.Sprintf(

	allErrs = append(allErrs, componentconfigs.Validate(c)...)
	for _, certError := range ValidateCertValidity(c) {
		klog.Warningf("WARNING: %s", certError.Error())
	}
	return allErrs
}

// ValidateAPIServer validates a APIServer object and collects all encountered errors
func ValidateAPIServer(a *kubeadm.APIServer, fldPath *field.Path) field.ErrorList {

	if addr == nil {
		warnings = append(warnings, errors.Errorf("hostname \"%s\" could not be reached", hc.nodeName))
	}
	if err != nil {
		warnings = append(warnings, errors.Wrapf(err, "hostname \"%s\"", hc.nodeName))
	}
	return warnings, errorList
}

// HTTPProxyCheck checks if https connection to specific host is going
// to be done directly or over proxy. If proxy detected, it will return warning.
type HTTPProxyCheck struct {

			// Errors in Corefile Migration is verified during preflight checks. This part will be executed when a user has chosen
			// to ignore preflight check errors.
			canMigrateCorefile = false
			klog.Warningf("the CoreDNS Configuration was not migrated: %v. The existing CoreDNS Corefile configuration has been retained.", err)

		sizes, err := ParseWatchCacheSizes(f.Options.WatchCacheSizes)
		if err != nil {
			return generic.RESTOptions{}, err
		}
		size, ok := sizes[resource]
		if ok && size > 0 {
			klog.Warningf("Dropping watch-cache-size for %v - watchCache size is now dynamic", resource)
		}
		if ok && size <= 0 {
			klog.V(3).InfoS("Not using watch cache", "resource", resource)
			ret.Decorator = generic.UndecoratedStorage

		Name:         driverName,
		NodeID:       driverNodeID,
		TopologyKeys: sets.List[string](topologyKeys),
	}

	if maxAttachLimit > 0 {
		if maxAttachLimit > math.MaxInt32 {
			klog.Warningf("Exceeded max supported attach limit value, truncating it to %d", math.MaxInt32)
			maxAttachLimit = math.MaxInt32
		}
		m := int32(maxAttachLimit)
		driverSpec.Allocatable = &storagev1.VolumeNodeResources{Count: &m}