Example #1
0
func startThinPoolWatcher(dockerInfo *dockertypes.Info) (*devicemapper.ThinPoolWatcher, error) {
	_, err := devicemapper.ThinLsBinaryPresent()
	if err != nil {
		return nil, err
	}

	if err := ensureThinLsKernelVersion(machine.KernelVersion()); err != nil {
		return nil, err
	}

	dockerThinPoolName, err := dockerutil.DockerThinPoolName(*dockerInfo)
	if err != nil {
		return nil, err
	}

	dockerMetadataDevice, err := dockerutil.DockerMetadataDevice(*dockerInfo)
	if err != nil {
		return nil, err
	}

	thinPoolWatcher, err := devicemapper.NewThinPoolWatcher(dockerThinPoolName, dockerMetadataDevice)
	if err != nil {
		return nil, err
	}

	go thinPoolWatcher.Start()
	return thinPoolWatcher, nil
}
Example #2
0
// Register root container before running this function!
func Register(factory info.MachineInfoFactory, fsInfo fs.FsInfo, ignoreMetrics container.MetricSet) error {
	client, err := Client()
	if err != nil {
		return fmt.Errorf("unable to communicate with docker daemon: %v", err)
	}

	dockerInfo, err := ValidateInfo()
	if err != nil {
		return fmt.Errorf("failed to validate Docker info: %v", err)
	}

	// Version already validated above, assume no error here.
	dockerVersion, _ := parseDockerVersion(dockerInfo.ServerVersion)

	cgroupSubsystems, err := libcontainer.GetCgroupSubsystems()
	if err != nil {
		return fmt.Errorf("failed to get cgroup subsystems: %v", err)
	}

	var (
		dockerStorageDriver                               = storageDriver(dockerInfo.Driver)
		thinPoolWatcher     *devicemapper.ThinPoolWatcher = nil
	)

	if dockerStorageDriver == devicemapperStorageDriver {
		// If the storage drive is devicemapper, create and start a
		// ThinPoolWatcher to monitor the size of container CoW layers with
		// thin_ls.
		dockerThinPoolName, err := dockerutil.DockerThinPoolName(*dockerInfo)
		if err != nil {
			return fmt.Errorf("couldn't find device mapper thin pool name: %v", err)
		}

		dockerMetadataDevice, err := dockerutil.DockerMetadataDevice(*dockerInfo)
		if err != nil {
			return fmt.Errorf("couldn't determine devicemapper metadata device")
		}

		thinPoolWatcher = devicemapper.NewThinPoolWatcher(dockerThinPoolName, dockerMetadataDevice)
		go thinPoolWatcher.Start()
	}

	glog.Infof("registering Docker factory")
	f := &dockerFactory{
		cgroupSubsystems:   cgroupSubsystems,
		client:             client,
		dockerVersion:      dockerVersion,
		fsInfo:             fsInfo,
		machineInfoFactory: factory,
		storageDriver:      storageDriver(dockerInfo.Driver),
		storageDir:         RootDir(),
		ignoreMetrics:      ignoreMetrics,
		thinPoolWatcher:    thinPoolWatcher,
	}

	container.RegisterContainerHandlerFactory(f, []watcher.ContainerWatchSource{watcher.Raw})
	return nil
}