Ejemplo n.º 1
0
func configureSysInit(config *Config, rootUID, rootGID int) (string, error) {
	localCopy := filepath.Join(config.Root, "init", fmt.Sprintf("dockerinit-%s", dockerversion.VERSION))
	sysInitPath := utils.DockerInitPath(localCopy)
	if sysInitPath == "" {
		return "", fmt.Errorf("Could not locate dockerinit: This usually means docker was built incorrectly. See https://docs.docker.com/project/set-up-dev-env/ for official build instructions.")
	}

	if sysInitPath != localCopy {
		// When we find a suitable dockerinit binary (even if it's our local binary), we copy it into config.Root at localCopy for future use (so that the original can go away without that being a problem, for example during a package upgrade).
		if err := idtools.MkdirAs(filepath.Dir(localCopy), 0700, rootUID, rootGID); err != nil && !os.IsExist(err) {
			return "", err
		}
		if _, err := fileutils.CopyFile(sysInitPath, localCopy); err != nil {
			return "", err
		}
		if err := os.Chmod(localCopy, 0700); err != nil {
			return "", err
		}
		sysInitPath = localCopy
	}
	return sysInitPath, nil
}
Ejemplo n.º 2
0
func NewDaemon(config *Config, registryService *registry.Service) (daemon *Daemon, err error) {
	// Check for mutually incompatible config options
	if config.Bridge.Iface != "" && config.Bridge.IP != "" {
		return nil, fmt.Errorf("You specified -b & --bip, mutually exclusive options. Please specify only one.")
	}
	setDefaultMtu(config)

	if !config.Bridge.EnableIPTables && !config.Bridge.InterContainerCommunication {
		return nil, fmt.Errorf("You specified --iptables=false with --icc=false. ICC uses iptables to function. Please set --icc or --iptables to true.")
	}
	if !config.Bridge.EnableIPTables && config.Bridge.EnableIPMasq {
		config.Bridge.EnableIPMasq = false
	}
	config.DisableNetwork = config.Bridge.Iface == disableNetworkBridge

	// Check that the system is supported and we have sufficient privileges
	if runtime.GOOS != "linux" {
		return nil, fmt.Errorf("The Docker daemon is only supported on linux")
	}
	if os.Geteuid() != 0 {
		return nil, fmt.Errorf("The Docker daemon needs to be run as root")
	}
	if err := checkKernel(); err != nil {
		return nil, err
	}

	// set up SIGUSR1 handler to dump Go routine stacks
	setupSigusr1Trap()

	// set up the tmpDir to use a canonical path
	tmp, err := tempDir(config.Root)
	if err != nil {
		return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
	}
	realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
	if err != nil {
		return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
	}
	os.Setenv("TMPDIR", realTmp)

	// get the canonical path to the Docker root directory
	var realRoot string
	if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
		realRoot = config.Root
	} else {
		realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
		if err != nil {
			return nil, fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
		}
	}
	config.Root = realRoot
	// Create the root directory if it doesn't exists
	if err := os.MkdirAll(config.Root, 0700); err != nil && !os.IsExist(err) {
		return nil, err
	}

	// Set the default driver
	graphdriver.DefaultDriver = config.GraphDriver

	// Load storage driver
	driver, err := graphdriver.New(config.Root, config.GraphOptions)
	if err != nil {
		return nil, fmt.Errorf("error initializing graphdriver: %v", err)
	}
	logrus.Debugf("Using graph driver %s", driver)

	d := &Daemon{}
	d.driver = driver

	defer func() {
		if err != nil {
			if err := d.Shutdown(); err != nil {
				logrus.Error(err)
			}
		}
	}()

	// Verify logging driver type
	if config.LogConfig.Type != "none" {
		if _, err := logger.GetLogDriver(config.LogConfig.Type); err != nil {
			return nil, fmt.Errorf("error finding the logging driver: %v", err)
		}
	}
	logrus.Debugf("Using default logging driver %s", config.LogConfig.Type)

	if config.EnableSelinuxSupport {
		if selinuxEnabled() {
			// As Docker on btrfs and SELinux are incompatible at present, error on both being enabled
			if d.driver.String() == "btrfs" {
				return nil, fmt.Errorf("SELinux is not supported with the BTRFS graph driver")
			}
			logrus.Debug("SELinux enabled successfully")
		} else {
			logrus.Warn("Docker could not enable SELinux on the host system")
		}
	} else {
		selinuxSetDisabled()
	}

	daemonRepo := path.Join(config.Root, "containers")

	if err := os.MkdirAll(daemonRepo, 0700); err != nil && !os.IsExist(err) {
		return nil, err
	}

	// Migrate the container if it is aufs and aufs is enabled
	if err := migrateIfAufs(d.driver, config.Root); err != nil {
		return nil, err
	}

	logrus.Debug("Creating images graph")
	g, err := graph.NewGraph(path.Join(config.Root, "graph"), d.driver)
	if err != nil {
		return nil, err
	}

	volumesDriver, err := local.New(config.Root)
	if err != nil {
		return nil, err
	}
	volumedrivers.Register(volumesDriver, volumesDriver.Name())

	trustKey, err := api.LoadOrCreateTrustKey(config.TrustKeyPath)
	if err != nil {
		return nil, err
	}

	trustDir := path.Join(config.Root, "trust")
	if err := os.MkdirAll(trustDir, 0700); err != nil && !os.IsExist(err) {
		return nil, err
	}
	trustService, err := trust.NewTrustStore(trustDir)
	if err != nil {
		return nil, fmt.Errorf("could not create trust store: %s", err)
	}

	eventsService := events.New()
	logrus.Debug("Creating repository list")
	tagCfg := &graph.TagStoreConfig{
		Graph:    g,
		Key:      trustKey,
		Registry: registryService,
		Events:   eventsService,
		Trust:    trustService,
	}
	repositories, err := graph.NewTagStore(path.Join(config.Root, "repositories-"+d.driver.String()), tagCfg)
	if err != nil {
		return nil, fmt.Errorf("Couldn't create Tag store: %s", err)
	}

	if !config.DisableNetwork {
		d.netController, err = initNetworkController(config)
		if err != nil {
			return nil, fmt.Errorf("Error initializing network controller: %v", err)
		}
	}

	graphdbPath := path.Join(config.Root, "linkgraph.db")
	graph, err := graphdb.NewSqliteConn(graphdbPath)
	if err != nil {
		return nil, err
	}

	d.containerGraph = graph

	localCopy := path.Join(config.Root, "init", fmt.Sprintf("dockerinit-%s", dockerversion.VERSION))
	sysInitPath := utils.DockerInitPath(localCopy)
	if sysInitPath == "" {
		return nil, fmt.Errorf("Could not locate dockerinit: This usually means docker was built incorrectly. See https://docs.docker.com/contributing/devenvironment for official build instructions.")
	}

	if sysInitPath != localCopy {
		// When we find a suitable dockerinit binary (even if it's our local binary), we copy it into config.Root at localCopy for future use (so that the original can go away without that being a problem, for example during a package upgrade).
		if err := os.Mkdir(path.Dir(localCopy), 0700); err != nil && !os.IsExist(err) {
			return nil, err
		}
		if _, err := fileutils.CopyFile(sysInitPath, localCopy); err != nil {
			return nil, err
		}
		if err := os.Chmod(localCopy, 0700); err != nil {
			return nil, err
		}
		sysInitPath = localCopy
	}

	sysInfo := sysinfo.New(false)
	ed, err := execdrivers.NewDriver(config.ExecDriver, config.ExecOptions, config.ExecRoot, config.Root, sysInitPath, sysInfo)
	if err != nil {
		return nil, err
	}

	d.ID = trustKey.PublicKey().KeyID()
	d.repository = daemonRepo
	d.containers = &contStore{s: make(map[string]*Container)}
	d.execCommands = newExecStore()
	d.graph = g
	d.repositories = repositories
	d.idIndex = truncindex.NewTruncIndex([]string{})
	d.sysInfo = sysInfo
	d.config = config
	d.sysInitPath = sysInitPath
	d.execDriver = ed
	d.statsCollector = newStatsCollector(1 * time.Second)
	d.defaultLogConfig = config.LogConfig
	d.RegistryService = registryService
	d.EventsService = eventsService
	d.root = config.Root

	if err := d.restore(); err != nil {
		return nil, err
	}

	return d, nil
}