if err != nil {
			klog.Warningf("Warning: Failed to flush multipath device map: %s\nError: %v", mpathDevice, err)
			// Fall through -- keep deleting the block devices
		}
		klog.V(4).Infof("Flushed multipath device: %s", mpathDevice)
	}
	for _, deviceName := range deviceNames {
		err = deleteDevice(deviceName)
		if err != nil {

	return out
}

// WarningHeader contains a single RFC2616 14.46 warnings header
type WarningHeader struct {
	// Codeindicates the type of warning. 299 is a miscellaneous persistent warning
	Code int
	// Agent contains the name or pseudonym of the server adding the Warning header.
	// A single "-" is recommended when agent is unknown.
	Agent string
	// Warning text
	Text string
}

// ParseWarningHeaders extract RFC2616 14.46

func ChooseAPIServerBindAddress(bindAddress net.IP) (net.IP, error) {
	ip, err := netutil.ResolveBindAddress(bindAddress)
	if err != nil {
		if netutil.IsNoRoutesError(err) {
			klog.Warningf("WARNING: could not obtain a bind address for the API Server: %v; using: %s", err, constants.DefaultAPIServerBindAddress)
			defaultIP := netutils.ParseIPSloppy(constants.DefaultAPIServerBindAddress)
			if defaultIP == nil {

	if watchListOptions, hasWatchListOptionsPrepared, watchListOptionsErr := watchlist.PrepareWatchListOptionsFromListOptions(opts); watchListOptionsErr != nil {
		klog.Warningf("Failed preparing watchlist options for customresourcedefinitions, falling back to the standard LIST semantics, err = %v", watchListOptionsErr)
	} else if hasWatchListOptionsPrepared {
		result, err := c.watchList(ctx, watchListOptions)

	if watchListOptions, hasWatchListOptionsPrepared, watchListOptionsErr := watchlist.PrepareWatchListOptionsFromListOptions(opts); watchListOptionsErr != nil {
		klog.Warningf("Failed preparing watchlist options for customresourcedefinitions, falling back to the standard LIST semantics, err = %v", watchListOptionsErr)
	} else if hasWatchListOptionsPrepared {
		result, err := c.watchList(ctx, watchListOptions)

	if pathExists, pathErr := mount.PathExists(path); pathErr != nil {
		return pathExists, fmt.Errorf("error checking if path exists: %w", pathErr)
	} else if !pathExists {
		klog.Warningf("Warning: Unmap skipped because path does not exist: %v", path)
		return pathExists, nil
	}
	return true, nil

		context.TODO(),
		kubeadmconstants.CoreDNSConfigMap,
		metav1.GetOptions{},
	); err != nil && apierrors.IsNotFound(err) {
		missingCoreDNSConfigMap = true
	}
	if missingCoreDNSConfigMap {
		klog.Warningf("the ConfigMaps %q in the namespace %q were not found. "+
			"Assuming that a DNS server was not deployed for this cluster. "+
			"Note that once 'kubeadm upgrade apply' supports phases you "+

				return nil, err
			}
			continue
		}

		// If the group is neither a kubeadm core type or of a supported component config group, we dump a warning about it being ignored
		if !componentconfigs.Scheme.IsGroupRegistered(gvk.Group) {
			klog.Warningf("[config] WARNING: Ignored YAML document with GroupVersionKind %v\n", gvk)
		}
	}

			v.Err = appendError(v.Err, t.Err)
			v.Warning = appendError(v.Warning, t.Warning)
		default:
			v.Err = appendError(v.Err, t)
		}
	}
	return v
}

// AppendWarningf appends a formatted warning string
// nolint: unparam
func AppendWarningf(v Validation, format string, a ...any) Validation {
	return AppendValidation(v, Warningf(format, a...))
}

			if isValidAuthzMode(requested) {
				mode = append(mode, requested)
			} else {
				klog.Warningf("ignoring unknown kube-apiserver authorization-mode %q", requested)
			}
		}

		// only return the user provided mode if at least one was valid
		if len(mode) > 0 {
			if !compareAuthzModes(defaultMode, mode) {
				klog.Warningf("the default kube-apiserver authorization-mode is %q; using %q",
					strings.Join(defaultMode, ","),