func dockerInfo() (DockerStatus, error) {
	dockerInfo, err := docker.DockerInfo()
	if err != nil {
		return DockerStatus{}, err
	}
	versionInfo, err := getVersionInfo()
	if err != nil {
		return DockerStatus{}, err
	}
	out := DockerStatus{}
	out.Version = versionInfo.DockerVersion
	out.KernelVersion = dockerInfo.KernelVersion
	out.OS = dockerInfo.OperatingSystem
	out.Hostname = dockerInfo.Name
	out.RootDir = dockerInfo.DockerRootDir
	out.Driver = dockerInfo.Driver
	out.ExecDriver = dockerInfo.ExecutionDriver
	out.NumImages = dockerInfo.Images
	out.NumContainers = dockerInfo.Containers
	out.DriverStatus = make(map[string]string, len(dockerInfo.DriverStatus))
	for _, v := range dockerInfo.DriverStatus {
		out.DriverStatus[v[0]] = v[1]
	}
	return out, nil
}

func (m *manager) DockerInfo() (DockerStatus, error) {
	info, err := docker.DockerInfo()
	if err != nil {
		return DockerStatus{}, err
	}
	versionInfo, err := m.GetVersionInfo()
	if err != nil {
		return DockerStatus{}, err
	}
	out := DockerStatus{}
	out.Version = versionInfo.DockerVersion
	if val, ok := info["KernelVersion"]; ok {
		out.KernelVersion = val
	}
	if val, ok := info["OperatingSystem"]; ok {
		out.OS = val
	}
	if val, ok := info["Name"]; ok {
		out.Hostname = val
	}
	if val, ok := info["DockerRootDir"]; ok {
		out.RootDir = val
	}
	if val, ok := info["Driver"]; ok {
		out.Driver = val
	}
	if val, ok := info["ExecutionDriver"]; ok {
		out.ExecDriver = val
	}
	if val, ok := info["Images"]; ok {
		n, err := strconv.Atoi(val)
		if err == nil {
			out.NumImages = n
		}
	}
	if val, ok := info["Containers"]; ok {
		n, err := strconv.Atoi(val)
		if err == nil {
			out.NumContainers = n
		}
	}
	// cut, trim, cut - Example format:
	// DriverStatus=[["Root Dir","/var/lib/docker/aufs"],["Backing Filesystem","extfs"],["Dirperm1 Supported","false"]]
	if val, ok := info["DriverStatus"]; ok {
		out.DriverStatus = make(map[string]string)
		val = strings.TrimPrefix(val, "[[")
		val = strings.TrimSuffix(val, "]]")
		vals := strings.Split(val, "],[")
		for _, v := range vals {
			kv := strings.Split(v, "\",\"")
			if len(kv) != 2 {
				continue
			} else {
				out.DriverStatus[strings.Trim(kv[0], "\"")] = strings.Trim(kv[1], "\"")
			}
		}
	}
	return out, nil
}

// New takes a memory storage and returns a new manager.
func New(memoryCache *memory.InMemoryCache, sysfs sysfs.SysFs, maxHousekeepingInterval time.Duration, allowDynamicHousekeeping bool) (Manager, error) {
	if memoryCache == nil {
		return nil, fmt.Errorf("manager requires memory storage")
	}

	// Detect the container we are running on.
	selfContainer, err := cgroups.GetThisCgroupDir("cpu")
	if err != nil {
		return nil, err
	}
	glog.Infof("cAdvisor running in container: %q", selfContainer)

	dockerInfo, err := docker.DockerInfo()
	if err != nil {
		glog.Warningf("Unable to connect to Docker: %v", err)
	}
	context := fs.Context{DockerRoot: docker.RootDir(), DockerInfo: dockerInfo}
	fsInfo, err := fs.NewFsInfo(context)
	if err != nil {
		return nil, err
	}

	// If cAdvisor was started with host's rootfs mounted, assume that its running
	// in its own namespaces.
	inHostNamespace := false
	if _, err := os.Stat("/rootfs/proc"); os.IsNotExist(err) {
		inHostNamespace = true
	}

	newManager := &manager{
		containers:               make(map[namespacedContainerName]*containerData),
		quitChannels:             make([]chan error, 0, 2),
		memoryCache:              memoryCache,
		fsInfo:                   fsInfo,
		cadvisorContainer:        selfContainer,
		inHostNamespace:          inHostNamespace,
		startupTime:              time.Now(),
		maxHousekeepingInterval:  maxHousekeepingInterval,
		allowDynamicHousekeeping: allowDynamicHousekeeping,
		ignoreMetrics:            ignoreMetrics.MetricSet,
	}

	machineInfo, err := getMachineInfo(sysfs, fsInfo, inHostNamespace)
	if err != nil {
		return nil, err
	}
	newManager.machineInfo = *machineInfo
	glog.Infof("Machine: %+v", newManager.machineInfo)

	versionInfo, err := getVersionInfo()
	if err != nil {
		return nil, err
	}
	glog.Infof("Version: %+v", *versionInfo)

	newManager.eventHandler = events.NewEventManager(parseEventsStoragePolicy())
	return newManager, nil
}

func (m *manager) DockerInfo() (DockerStatus, error) {
	info, err := docker.DockerInfo()
	if err != nil {
		return DockerStatus{}, err
	}
	versionInfo, err := m.GetVersionInfo()
	if err != nil {
		return DockerStatus{}, err
	}
	out := DockerStatus{}
	out.Version = versionInfo.DockerVersion
	if val, ok := info["KernelVersion"]; ok {
		out.KernelVersion = val
	}
	if val, ok := info["OperatingSystem"]; ok {
		out.OS = val
	}
	if val, ok := info["Name"]; ok {
		out.Hostname = val
	}
	if val, ok := info["DockerRootDir"]; ok {
		out.RootDir = val
	}
	if val, ok := info["Driver"]; ok {
		out.Driver = val
	}
	if val, ok := info["ExecutionDriver"]; ok {
		out.ExecDriver = val
	}
	if val, ok := info["Images"]; ok {
		n, err := strconv.Atoi(val)
		if err == nil {
			out.NumImages = n
		}
	}
	if val, ok := info["Containers"]; ok {
		n, err := strconv.Atoi(val)
		if err == nil {
			out.NumContainers = n
		}
	}
	if val, ok := info["DriverStatus"]; ok {
		var driverStatus [][]string
		err := json.Unmarshal([]byte(val), &driverStatus)
		if err != nil {
			return DockerStatus{}, err
		}
		out.DriverStatus = make(map[string]string)
		for _, v := range driverStatus {
			if len(v) == 2 {
				out.DriverStatus[v[0]] = v[1]
			}
		}
	}
	return out, nil
}