Golang mount.GetMountRefs函數代碼示例

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (v *vsphereVolumeUnmounter) TearDownAt(dir string) error {
	glog.V(5).Infof("vSphere Volume TearDown of %s", dir)
	notmnt, err := v.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		glog.V(4).Infof("Error checking if mountpoint ", dir, ": ", err)
		return err
	}
	if notmnt {
		glog.V(4).Infof("Not mount point,deleting")
		return os.Remove(dir)
	}

	// Find vSphere volumeID to lock the right volume
	refs, err := mount.GetMountRefs(v.mounter, dir)
	if err != nil {
		glog.V(4).Infof("Error getting mountrefs for ", dir, ": ", err)
		return err
	}
	if len(refs) == 0 {
		glog.V(4).Infof("Directory %s is not mounted", dir)
		return fmt.Errorf("directory %s is not mounted", dir)
	}

	v.volPath = path.Base(refs[0])
	glog.V(4).Infof("Found volume %s mounted to %s", v.volPath, dir)

	// Reload list of references, there might be SetUpAt finished in the meantime
	refs, err = mount.GetMountRefs(v.mounter, dir)
	if err != nil {
		glog.V(4).Infof("GetMountRefs failed: %v", err)
		return err
	}
	if err := v.mounter.Unmount(dir); err != nil {
		glog.V(4).Infof("Unmount failed: %v", err)
		return err
	}
	glog.V(3).Infof("Successfully unmounted: %s\n", dir)

	// If refCount is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		if err := v.manager.DetachDisk(v); err != nil {
			glog.V(4).Infof("DetachDisk failed: %v", err)
			return err
		}
		glog.V(3).Infof("Volume %s detached", v.volPath)
	}
	notmnt, mntErr := v.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notmnt {
		if err := os.Remove(dir); err != nil {
			glog.V(4).Infof("Failed to remove directory after unmount: %v", err)
			return err
		}
	}
	return nil
}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (c *cinderVolumeUnmounter) TearDownAt(dir string) error {
	glog.V(5).Infof("Cinder TearDown of %s", dir)
	notmnt, err := c.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		glog.V(4).Infof("IsLikelyNotMountPoint check failed: %v", err)
		return err
	}
	if notmnt {
		glog.V(4).Infof("Nothing is mounted to %s, ignoring", dir)
		return os.Remove(dir)
	}

	// Find Cinder volumeID to lock the right volume
	// TODO: refactor VolumePlugin.NewUnmounter to get full volume.Spec just like
	// NewMounter. We could then find volumeID there without probing MountRefs.
	refs, err := mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		glog.V(4).Infof("GetMountRefs failed: %v", err)
		return err
	}
	if len(refs) == 0 {
		glog.V(4).Infof("Directory %s is not mounted", dir)
		return fmt.Errorf("directory %s is not mounted", dir)
	}
	c.pdName = path.Base(refs[0])
	glog.V(4).Infof("Found volume %s mounted to %s", c.pdName, dir)

	// lock the volume (and thus wait for any concurrrent SetUpAt to finish)
	c.plugin.volumeLocks.LockKey(c.pdName)
	defer c.plugin.volumeLocks.UnlockKey(c.pdName)

	// Reload list of references, there might be SetUpAt finished in the meantime
	refs, err = mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		glog.V(4).Infof("GetMountRefs failed: %v", err)
		return err
	}
	if err := c.mounter.Unmount(dir); err != nil {
		glog.V(4).Infof("Unmount failed: %v", err)
		return err
	}
	glog.V(3).Infof("Successfully unmounted: %s\n", dir)

	notmnt, mntErr := c.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notmnt {
		if err := os.Remove(dir); err != nil {
			glog.V(4).Infof("Failed to remove directory after unmount: %v", err)
			return err
		}
	}
	return nil
}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (c *cinderVolumeCleaner) TearDownAt(dir string) error {
	notmnt, err := c.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		return err
	}

	exist, _ := util.FileExists(path.Join(dir, OpenStackCloudProviderTagFile))
	if exist {
		c.withOpenStackCP = false
	} else {
		c.withOpenStackCP = true
	}

	if notmnt {
		if !c.withOpenStackCP && c.isNoMountSupported {
			volumeID, err := ioutil.ReadFile(path.Join(dir, OpenStackCloudProviderTagFile))
			if err != nil {
				return err
			}

			c.pdName = string(volumeID)
			if err := c.manager.DetachDisk(c); err != nil {
				return err
			}
		}

		return os.RemoveAll(dir)
	}

	refs, err := mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		return err
	}
	if err := c.mounter.Unmount(dir); err != nil {
		return err
	}
	glog.Infof("successfully unmounted: %s\n", dir)

	// If refCount is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		c.pdName = path.Base(refs[0])
		if err := c.manager.DetachDisk(c); err != nil {
			return err
		}
	}
	notmnt, mntErr := c.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if !notmnt {
		if err := os.Remove(dir); err != nil {
			return err
		}
	}
	return nil
}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (c *awsElasticBlockStoreCleaner) TearDownAt(dir string) error {
	notMnt, err := c.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		glog.V(2).Info("Error checking if mountpoint ", dir, ": ", err)
		return err
	}
	if notMnt {
		glog.V(2).Info("Not mountpoint, deleting")
		return os.Remove(dir)
	}

	refs, err := mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		glog.V(2).Info("Error getting mountrefs for ", dir, ": ", err)
		return err
	}
	if len(refs) == 0 {
		glog.Warning("Did not find pod-mount for ", dir, " during tear-down")
	}
	// Unmount the bind-mount inside this pod
	if err := c.mounter.Unmount(dir); err != nil {
		glog.V(2).Info("Error unmounting dir ", dir, ": ", err)
		return err
	}
	// If len(refs) is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		// c.volumeID is not initially set for volume-cleaners, so set it here.
		c.volumeID, err = getVolumeIDFromGlobalMount(c.plugin.host, refs[0])
		if err != nil {
			glog.V(2).Info("Could not determine volumeID from mountpoint ", refs[0], ": ", err)
			return err
		}
		if err := c.manager.DetachDisk(&awsElasticBlockStoreCleaner{c.awsElasticBlockStore}); err != nil {
			glog.V(2).Info("Error detaching disk ", c.volumeID, ": ", err)
			return err
		}
	} else {
		glog.V(2).Infof("Found multiple refs; won't detach EBS volume: %v", refs)
	}
	notMnt, mntErr := c.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notMnt {
		if err := os.Remove(dir); err != nil {
			glog.V(2).Info("Error removing mountpoint ", dir, ": ", err)
			return err
		}
	}
	return nil
}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (c *azureDiskUnmounter) TearDownAt(dir string) error {
	if pathExists, pathErr := util.PathExists(dir); pathErr != nil {
		return fmt.Errorf("Error checking if path exists: %v", pathErr)
	} else if !pathExists {
		glog.Warningf("Warning: Unmount skipped because path does not exist: %v", dir)
		return nil
	}

	notMnt, err := c.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		glog.Errorf("Error checking if mountpoint %s: %v", dir, err)
		return err
	}
	if notMnt {
		glog.V(2).Info("Not mountpoint, deleting")
		return os.Remove(dir)
	}
	// lock the volume (and thus wait for any concurrrent SetUpAt to finish)
	c.plugin.volumeLocks.LockKey(c.diskName)
	defer c.plugin.volumeLocks.UnlockKey(c.diskName)
	refs, err := mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		glog.Errorf("Error getting mountrefs for %s: %v", dir, err)
		return err
	}
	if len(refs) == 0 {
		glog.Errorf("Did not find pod-mount for %s during tear down", dir)
		return fmt.Errorf("%s is not mounted", dir)
	}
	c.diskName = path.Base(refs[0])
	glog.V(4).Infof("Found volume %s mounted to %s", c.diskName, dir)

	// Unmount the bind-mount inside this pod
	if err := c.mounter.Unmount(dir); err != nil {
		glog.Errorf("Error unmounting dir %s %v", dir, err)
		return err
	}
	notMnt, mntErr := c.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notMnt {
		if err := os.Remove(dir); err != nil {
			glog.Errorf("Error removing mountpoint %s %v", dir, err)
			return err
		}
	}
	return nil
}

// utility to tear down a disk based filesystem
func diskTearDown(manager diskManager, c iscsiDiskCleaner, volPath string, mounter mount.Interface) error {
	notMnt, err := mounter.IsLikelyNotMountPoint(volPath)
	if err != nil {
		glog.Errorf("cannot validate mountpoint %s", volPath)
		return err
	}
	if notMnt {
		return os.Remove(volPath)
	}

	refs, err := mount.GetMountRefs(mounter, volPath)
	if err != nil {
		glog.Errorf("failed to get reference count %s", volPath)
		return err
	}
	if err := mounter.Unmount(volPath); err != nil {
		glog.Errorf("failed to unmount %s", volPath)
		return err
	}
	// If len(refs) is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		mntPath := refs[0]
		if err := manager.DetachDisk(c, mntPath); err != nil {
			glog.Errorf("failed to detach disk from %s", mntPath)
			return err
		}
	}

	notMnt, mntErr := mounter.IsLikelyNotMountPoint(volPath)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notMnt {
		if err := os.Remove(volPath); err != nil {
			return err
		}
	}
	return nil

}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (c *gcePersistentDiskCleaner) TearDownAt(dir string) error {
	notMnt, err := c.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		return err
	}
	if notMnt {
		return os.Remove(dir)
	}

	refs, err := mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		return err
	}
	// Unmount the bind-mount inside this pod
	if err := c.mounter.Unmount(dir); err != nil {
		return err
	}
	// If len(refs) is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		// c.pdName is not initially set for volume-cleaners, so set it here.
		c.pdName = path.Base(refs[0])
		if err := c.manager.DetachDisk(c); err != nil {
			return err
		}
	}
	notMnt, mntErr := c.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notMnt {
		if err := os.Remove(dir); err != nil {
			return err
		}
	}
	return nil
}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (c *cinderVolumeCleaner) TearDownAt(dir string) error {
	notmnt, err := c.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		return err
	}
	if notmnt {
		return os.Remove(dir)
	}
	refs, err := mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		return err
	}
	if err := c.mounter.Unmount(dir); err != nil {
		return err
	}
	glog.Infof("successfully unmounted: %s\n", dir)

	// If refCount is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		c.pdName = path.Base(refs[0])
		if err := c.manager.DetachDisk(c); err != nil {
			return err
		}
	}
	notmnt, mntErr := c.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if !notmnt {
		if err := os.Remove(dir); err != nil {
			return err
		}
	}
	return nil
}

func (plugin *gcePersistentDiskPlugin) GetDeviceMountRefs(deviceMountPath string) ([]string, error) {
	mounter := plugin.host.GetMounter()
	return mount.GetMountRefs(mounter, deviceMountPath)
}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (c *cinderVolumeUnmounter) TearDownAt(dir string) error {
	glog.V(5).Infof("Cinder TearDown of %s", dir)

	if _, err := os.Stat(dir); os.IsNotExist(err) {
		// non-exist dir for TearDown is meaningless and it is possible that this dir has been cleaned up, just omit the error for now
		glog.Warningf("Volume directory: %v does not exists, it may have been cleaned up by previous tear down task", dir)
		return nil
	}

	notmnt, err := c.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		glog.V(4).Infof("IsLikelyNotMountPoint check failed: %v", err)
		return err
	}

	exist, _ := util.FileExists(path.Join(dir, OpenStackCloudProviderTagFile))
	if exist {
		c.withOpenStackCP = false
	} else {
		c.withOpenStackCP = true
	}

	if notmnt {
		// Find Cinder volumeID to lock the right volume
		// TODO: refactor VolumePlugin.NewCleaner to get full volume.Spec just like
		// NewBuilder. We could then find volumeID there without probing MountRefs.
		if !c.withOpenStackCP && c.isNoMountSupported {
			volumeID, err := ioutil.ReadFile(path.Join(dir, OpenStackCloudProviderTagFile))
			if err != nil {
				return err
			}

			c.pdName = string(volumeID)
			if err := c.manager.DetachDisk(c); err != nil {
				return err
			}
		}

		return os.RemoveAll(dir)
	}

	// Find Cinder volumeID to lock the right volume
	// TODO: refactor VolumePlugin.NewUnmounter to get full volume.Spec just like
	// NewMounter. We could then find volumeID there without probing MountRefs.
	refs, err := mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		glog.V(4).Infof("GetMountRefs failed: %v", err)
		return err
	}
	if len(refs) == 0 {
		glog.V(4).Infof("Directory %s is not mounted", dir)
		return fmt.Errorf("directory %s is not mounted", dir)
	}
	c.pdName = path.Base(refs[0])
	glog.V(4).Infof("Found volume %s mounted to %s", c.pdName, dir)

	// lock the volume (and thus wait for any concurrrent SetUpAt to finish)
	c.plugin.volumeLocks.LockKey(c.pdName)
	defer c.plugin.volumeLocks.UnlockKey(c.pdName)

	// Reload list of references, there might be SetUpAt finished in the meantime
	refs, err = mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		glog.V(4).Infof("GetMountRefs failed: %v", err)
		return err
	}
	if err := c.mounter.Unmount(dir); err != nil {
		glog.V(4).Infof("Unmount failed: %v", err)
		return err
	}
	glog.V(3).Infof("Successfully unmounted: %s\n", dir)

	notmnt, mntErr := c.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notmnt {
		if err := os.Remove(dir); err != nil {
			glog.V(4).Infof("Failed to remove directory after unmount: %v", err)
			return err
		}
	}
	return nil
}

func (plugin *cinderPlugin) GetDeviceMountRefs(deviceMountPath string) ([]string, error) {
	mounter := plugin.host.GetMounter()
	return mount.GetMountRefs(mounter, deviceMountPath)
}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (v *vsphereVolumeUnmounter) TearDownAt(dir string) error {
	glog.V(5).Infof("vSphere Volume TearDown of %s", dir)
	notmnt, err := v.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		glog.V(4).Infof("Error checking if mountpoint ", dir, ": ", err)
		return err
	}
	if notmnt {
		glog.V(4).Infof("Not mount point,deleting")
		return os.Remove(dir)
	}

	// Find vSphere volumeID to lock the right volume
	refs, err := mount.GetMountRefs(v.mounter, dir)
	if err != nil {
		glog.V(4).Infof("Error getting mountrefs for ", dir, ": ", err)
		return err
	}
	if len(refs) == 0 {
		glog.V(4).Infof("Directory %s is not mounted", dir)
		return fmt.Errorf("directory %s is not mounted", dir)
	}

	// space between datastore and vmdk name in volumePath is encoded as '\040' when returned by GetMountRefs().
	// volumePath eg: "[local] xxx.vmdk" provided to attach/mount
	// replacing \040 with space to match the actual volumePath
	mountPath := strings.Replace(path.Base(refs[0]), "\\040", " ", -1)
	v.volPath = mountPath
	glog.V(4).Infof("Found volume %s mounted to %s", v.volPath, dir)

	// Reload list of references, there might be SetUpAt finished in the meantime
	refs, err = mount.GetMountRefs(v.mounter, dir)
	if err != nil {
		glog.V(4).Infof("GetMountRefs failed: %v", err)
		return err
	}
	if err := v.mounter.Unmount(dir); err != nil {
		glog.V(4).Infof("Unmount failed: %v", err)
		return err
	}
	glog.V(3).Infof("Successfully unmounted: %s\n", dir)

	// If refCount is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		if err := v.manager.DetachDisk(v); err != nil {
			glog.V(4).Infof("DetachDisk failed: %v", err)
			return err
		}
		glog.V(3).Infof("Volume %s detached", v.volPath)
	}
	notmnt, mntErr := v.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notmnt {
		if err := os.Remove(dir); err != nil {
			glog.V(4).Infof("Failed to remove directory after unmount: %v", err)
			return err
		}
	}
	return nil
}

// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the kubelet.
func (c *cinderVolumeCleaner) TearDownAt(dir string) error {
	glog.V(5).Infof("Cinder TearDown of %s", dir)
	notmnt, err := c.mounter.IsLikelyNotMountPoint(dir)
	if err != nil {
		glog.V(4).Infof("IsLikelyNotMountPoint check failed: %v", err)
		return err
	}

	exist, _ := util.FileExists(path.Join(dir, OpenStackCloudProviderTagFile))
	if exist {
		c.withOpenStackCP = false
	} else {
		c.withOpenStackCP = true
	}

	if notmnt {
		// Find Cinder volumeID to lock the right volume
		// TODO: refactor VolumePlugin.NewCleaner to get full volume.Spec just like
		// NewBuilder. We could then find volumeID there without probing MountRefs.

		if !c.withOpenStackCP && c.isNoMountSupported {
			volumeID, err := ioutil.ReadFile(path.Join(dir, OpenStackCloudProviderTagFile))
			if err != nil {
				return err
			}

			c.pdName = string(volumeID)
			if err := c.manager.DetachDisk(c); err != nil {
				return err
			}
		}

		return os.RemoveAll(dir)
	}

	refs, err := mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		glog.V(4).Infof("GetMountRefs failed: %v", err)
		return err
	}
	if len(refs) == 0 {
		glog.V(4).Infof("Directory %s is not mounted", dir)
		return fmt.Errorf("directory %s is not mounted", dir)
	}
	c.pdName = path.Base(refs[0])
	glog.V(4).Infof("Found volume %s mounted to %s", c.pdName, dir)

	// lock the volume (and thus wait for any concurrrent SetUpAt to finish)
	c.plugin.volumeLocks.LockKey(c.pdName)
	defer c.plugin.volumeLocks.UnlockKey(c.pdName)

	// Reload list of references, there might be SetUpAt finished in the meantime
	refs, err = mount.GetMountRefs(c.mounter, dir)
	if err != nil {
		glog.V(4).Infof("GetMountRefs failed: %v", err)
		return err
	}
	if err := c.mounter.Unmount(dir); err != nil {
		glog.V(4).Infof("Unmount failed: %v", err)
		return err
	}
	glog.V(3).Infof("Successfully unmounted: %s\n", dir)

	// If refCount is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		if err := c.manager.DetachDisk(c); err != nil {
			glog.V(4).Infof("DetachDisk failed: %v", err)
			return err
		}
		glog.V(3).Infof("Volume %s detached", c.pdName)
	}
	notmnt, mntErr := c.mounter.IsLikelyNotMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notmnt {
		if err := os.Remove(dir); err != nil {
			glog.V(4).Infof("Failed to remove directory after unmount: %v", err)
			return err
		}
	}
	return nil
}