Example #1
0
// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the qinglet.
func (pd *awsElasticBlockStore) TearDownAt(dir string) error {
	mountpoint, err := pd.mounter.IsMountPoint(dir)
	if err != nil {
		glog.V(2).Info("Error checking if mountpoint ", dir, ": ", err)
		return err
	}
	if !mountpoint {
		glog.V(2).Info("Not mountpoint, deleting")
		return os.Remove(dir)
	}

	refs, err := mount.GetMountRefs(pd.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 := pd.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 {
		// pd.volumeID is not initially set for volume-cleaners, so set it here.
		pd.volumeID, err = getVolumeIDFromGlobalMount(pd.plugin.host, refs[0])
		if err != nil {
			glog.V(2).Info("Could not determine volumeID from mountpoint ", refs[0], ": ", err)
			return err
		}
		if err := pd.manager.DetachDisk(pd); err != nil {
			glog.V(2).Info("Error detaching disk ", pd.volumeID, ": ", err)
			return err
		}
	} else {
		glog.V(2).Infof("Found multiple refs; won't detach EBS volume: %v", refs)
	}
	mountpoint, mntErr := pd.mounter.IsMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("isMountpoint check failed: %v", mntErr)
		return err
	}
	if !mountpoint {
		if err := os.Remove(dir); err != nil {
			glog.V(2).Info("Error removing mountpoint ", dir, ": ", err)
			return err
		}
	}
	return nil
}
Example #2
0
// utility to tear down a disk based filesystem
func diskTearDown(manager diskManager, disk iscsiDisk, volPath string, mounter mount.Interface) error {
	mountpoint, err := mounter.IsMountPoint(volPath)
	if err != nil {
		glog.Errorf("cannot validate mountpoint %s", volPath)
		return err
	}
	if !mountpoint {
		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(disk, mntPath); err != nil {
			glog.Errorf("failed to detach disk from %s", mntPath)
			return err
		}
	}

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

}
Example #3
0
// Unmounts the bind mount, and detaches the disk only if the PD
// resource was the last reference to that disk on the qinglet.
func (pd *gcePersistentDisk) TearDownAt(dir string) error {
	mountpoint, err := pd.mounter.IsMountPoint(dir)
	if err != nil {
		return err
	}
	if !mountpoint {
		return os.Remove(dir)
	}

	refs, err := mount.GetMountRefs(pd.mounter, dir)
	if err != nil {
		return err
	}
	// Unmount the bind-mount inside this pod
	if err := pd.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 {
		// pd.pdName is not initially set for volume-cleaners, so set it here.
		pd.pdName = path.Base(refs[0])
		if err := pd.manager.DetachDisk(pd); err != nil {
			return err
		}
	}
	mountpoint, mntErr := pd.mounter.IsMountPoint(dir)
	if mntErr != nil {
		glog.Errorf("isMountpoint check failed: %v", mntErr)
		return err
	}
	if !mountpoint {
		if err := os.Remove(dir); err != nil {
			return err
		}
	}
	return nil
}