Example #1
0
func (b *configMapVolumeMounter) SetUpAt(dir string, fsGroup *int64) error {
	glog.V(3).Infof("Setting up volume %v for pod %v at %v", b.volName, b.pod.UID, dir)

	// Wrap EmptyDir, let it do the setup.
	wrapped, err := b.plugin.host.NewWrapperMounter(b.volName, wrappedVolumeSpec, &b.pod, *b.opts)
	if err != nil {
		return err
	}
	if err := wrapped.SetUpAt(dir, fsGroup); err != nil {
		return err
	}

	kubeClient := b.plugin.host.GetKubeClient()
	if kubeClient == nil {
		return fmt.Errorf("Cannot setup configMap volume %v because kube client is not configured", b.volName)
	}

	configMap, err := kubeClient.Core().ConfigMaps(b.pod.Namespace).Get(b.source.Name)
	if err != nil {
		glog.Errorf("Couldn't get configMap %v/%v: %v", b.pod.Namespace, b.source.Name, err)
		return err
	}

	totalBytes := totalBytes(configMap)
	glog.V(3).Infof("Received configMap %v/%v containing (%v) pieces of data, %v total bytes",
		b.pod.Namespace,
		b.source.Name,
		len(configMap.Data),
		totalBytes)

	payload, err := makePayload(b.source.Items, configMap)
	if err != nil {
		return err
	}

	writerContext := fmt.Sprintf("pod %v/%v volume %v", b.pod.Namespace, b.pod.Name, b.volName)
	writer, err := volumeutil.NewAtomicWriter(dir, writerContext)
	if err != nil {
		glog.Errorf("Error creating atomic writer: %v", err)
		return err
	}

	err = writer.Write(payload)
	if err != nil {
		glog.Errorf("Error writing payload to dir: %v", err)
		return err
	}

	err = volume.SetVolumeOwnership(b, fsGroup)
	if err != nil {
		glog.Errorf("Error applying volume ownership settings for group: %v", fsGroup)
		return err
	}

	return nil
}
Example #2
0
// SetUp bind mounts the disk global mount to the give volume path.
func (b *gcePersistentDiskMounter) SetUpAt(dir string, fsGroup *int64) error {
	// TODO: handle failed mounts here.
	notMnt, err := b.mounter.IsLikelyNotMountPoint(dir)
	glog.V(4).Infof("PersistentDisk set up: %s %v %v, pd name %v readOnly %v", dir, !notMnt, err, b.pdName, b.readOnly)
	if err != nil && !os.IsNotExist(err) {
		return err
	}
	if !notMnt {
		return nil
	}

	if err := os.MkdirAll(dir, 0750); err != nil {
		return err
	}

	// Perform a bind mount to the full path to allow duplicate mounts of the same PD.
	options := []string{"bind"}
	if b.readOnly {
		options = append(options, "ro")
	}

	globalPDPath := makeGlobalPDName(b.plugin.host, b.pdName)
	err = b.mounter.Mount(globalPDPath, dir, "", options)
	if err != nil {
		notMnt, mntErr := b.mounter.IsLikelyNotMountPoint(dir)
		if mntErr != nil {
			glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
			return err
		}
		if !notMnt {
			if mntErr = b.mounter.Unmount(dir); mntErr != nil {
				glog.Errorf("Failed to unmount: %v", mntErr)
				return err
			}
			notMnt, mntErr := b.mounter.IsLikelyNotMountPoint(dir)
			if mntErr != nil {
				glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
				return err
			}
			if !notMnt {
				// This is very odd, we don't expect it.  We'll try again next sync loop.
				glog.Errorf("%s is still mounted, despite call to unmount().  Will try again next sync loop.", dir)
				return err
			}
		}
		os.Remove(dir)
		return err
	}

	if !b.readOnly {
		volume.SetVolumeOwnership(b, fsGroup)
	}

	return nil
}
Example #3
0
// SetUpAt creates new directory.
func (ed *emptyDir) SetUpAt(dir string, fsGroup *int64) error {
	notMnt, err := ed.mounter.IsLikelyNotMountPoint(dir)
	// Getting an os.IsNotExist err from is a contingency; the directory
	// may not exist yet, in which case, setup should run.
	if err != nil && !os.IsNotExist(err) {
		return err
	}

	// If the plugin readiness file is present for this volume, and the
	// storage medium is the default, then the volume is ready.  If the
	// medium is memory, and a mountpoint is present, then the volume is
	// ready.
	if volumeutil.IsReady(ed.getMetaDir()) {
		if ed.medium == api.StorageMediumMemory && !notMnt {
			return nil
		} else if ed.medium == api.StorageMediumDefault {
			return nil
		}
	}

	// Determine the effective SELinuxOptions to use for this volume.
	securityContext := ""
	if selinuxEnabled() {
		securityContext = ed.rootContext
	}

	switch ed.medium {
	case api.StorageMediumDefault:
		err = ed.setupDir(dir)
	case api.StorageMediumMemory:
		err = ed.setupTmpfs(dir, securityContext)
	default:
		err = fmt.Errorf("unknown storage medium %q", ed.medium)
	}

	volume.SetVolumeOwnership(ed, fsGroup)

	if err == nil {
		volumeutil.SetReady(ed.getMetaDir())
	}

	return err
}
Example #4
0
// utility to mount a disk based filesystem
func diskSetUp(manager diskManager, b fcDiskMounter, volPath string, mounter mount.Interface, fsGroup *int64) error {
	globalPDPath := manager.MakeGlobalPDName(*b.fcDisk)
	// TODO: handle failed mounts here.
	noMnt, err := mounter.IsLikelyNotMountPoint(volPath)

	if err != nil && !os.IsNotExist(err) {
		glog.Errorf("cannot validate mountpoint: %s", volPath)
		return err
	}
	if !noMnt {
		return nil
	}
	if err := manager.AttachDisk(b); err != nil {
		glog.Errorf("failed to attach disk")
		return err
	}

	if err := os.MkdirAll(volPath, 0750); err != nil {
		glog.Errorf("failed to mkdir:%s", volPath)
		return err
	}
	// Perform a bind mount to the full path to allow duplicate mounts of the same disk.
	options := []string{"bind"}
	if b.readOnly {
		options = append(options, "ro")
	}
	err = mounter.Mount(globalPDPath, volPath, "", options)
	if err != nil {
		glog.Errorf("failed to bind mount:%s", globalPDPath)
		return err
	}

	if !b.readOnly {
		volume.SetVolumeOwnership(&b, fsGroup)
	}

	return nil
}