Golang strings.UnescapeQualifiedNameForDisk函數代碼示例

// newVolumeUnmounterFromPlugins attempts to find a plugin by name and then
// create an Unmounter.
// Returns a valid Unmounter or an error.
func (kl *Kubelet) newVolumeUnmounterFromPlugins(kind string, name string, podUID types.UID) (volume.Unmounter, string, error) {
	plugName := strings.UnescapeQualifiedNameForDisk(kind)
	plugin, err := kl.volumePluginMgr.FindPluginByName(plugName)
	if err != nil {
		// TODO: Maybe we should launch a cleanup of this dir?
		return nil, "", fmt.Errorf("can't use volume plugins for %s/%s: %v", podUID, kind, err)
	}

	unmounter, err := plugin.NewUnmounter(name, podUID)
	if err != nil {
		return nil, "", fmt.Errorf("failed to instantiate volume plugin for %s/%s: %v", podUID, kind, err)
	}
	glog.V(5).Infof("Using volume plugin %q to unmount %s/%s", plugin.Name(), podUID, kind)
	return unmounter, plugin.Name(), nil
}

// getVolumesFromPodDir scans through the volumes directories under the given pod directory.
// It returns a list of pod volume information including pod's uid, volume's plugin name, mount path,
// and volume spec name.
func getVolumesFromPodDir(podDir string) ([]podVolume, error) {
	podsDirInfo, err := ioutil.ReadDir(podDir)
	if err != nil {
		return nil, err
	}
	volumes := []podVolume{}
	for i := range podsDirInfo {
		if !podsDirInfo[i].IsDir() {
			continue
		}
		podName := podsDirInfo[i].Name()
		podDir := path.Join(podDir, podName)
		volumesDir := path.Join(podDir, options.DefaultKubeletVolumesDirName)
		volumesDirInfo, err := ioutil.ReadDir(volumesDir)
		if err != nil {
			glog.Errorf("Could not read volume directory %q: %v", volumesDir, err)
			continue
		}
		for _, volumeDir := range volumesDirInfo {
			pluginName := volumeDir.Name()
			volumePluginPath := path.Join(volumesDir, pluginName)

			volumePluginDirs, err := ioutil.ReadDir(volumePluginPath)
			if err != nil {
				glog.Errorf("Could not read volume plugin directory %q: %v", volumePluginPath, err)
				continue
			}

			unescapePluginName := strings.UnescapeQualifiedNameForDisk(pluginName)
			for _, volumeNameDir := range volumePluginDirs {
				if volumeNameDir != nil {
					volumeName := volumeNameDir.Name()
					mountPath := path.Join(volumePluginPath, volumeName)
					volumes = append(volumes, podVolume{
						podName:        volumetypes.UniquePodName(podName),
						volumeSpecName: volumeName,
						mountPath:      mountPath,
						pluginName:     unescapePluginName,
					})
				}
			}

		}
	}
	glog.V(10).Infof("Get volumes from pod directory %q %+v", podDir, volumes)
	return volumes, nil
}

// newVolumeDetacherFromPlugins attempts to find a plugin by a name and then
// create a Detacher.
// Returns:
//  - a detacher if one exists
//  - an error if no plugin was found for the volume
//    or the detacher failed to instantiate
//  - nil if there is no appropriate detacher for this volume
func (kl *Kubelet) newVolumeDetacherFromPlugins(kind string, name string, podUID types.UID) (volume.Detacher, error) {
	plugName := strings.UnescapeQualifiedNameForDisk(kind)
	plugin, err := kl.volumePluginMgr.FindAttachablePluginByName(plugName)
	if err != nil {
		return nil, fmt.Errorf("can't use volume plugins for %s/%s: %v", podUID, kind, err)
	}
	if plugin == nil {
		// Not found but not an error.
		return nil, nil
	}

	detacher, err := plugin.NewDetacher()
	if err != nil {
		return nil, fmt.Errorf("failed to instantiate volume plugin for %s/%s: %v", podUID, kind, err)
	}
	return detacher, nil
}

func (kl *Kubelet) newVolumeCleanerFromPlugins(kind string, name string, podUID types.UID) (volume.Cleaner, error) {
	plugName := strings.UnescapeQualifiedNameForDisk(kind)
	plugin, err := kl.volumePluginMgr.FindPluginByName(plugName)
	if err != nil {
		// TODO: Maybe we should launch a cleanup of this dir?
		return nil, fmt.Errorf("can't use volume plugins for %s/%s: %v", podUID, kind, err)
	}
	if plugin == nil {
		// Not found but not an error.
		return nil, nil
	}
	cleaner, err := plugin.NewCleaner(name, podUID)
	if err != nil {
		return nil, fmt.Errorf("failed to instantiate volume plugin for %s/%s: %v", podUID, kind, err)
	}
	glog.V(3).Infof("Used volume plugin %q for %s/%s", plugin.Name(), podUID, kind)
	return cleaner, nil
}