func newExecDriver() (execdriver.Driver, error) {
sysInitPath := path.Join(dockerRoot, "init", fmt.Sprintf("dockerinit-%s", dockerversion.VERSION))
//sysInfo := sysinfo.New(false)
// only native driver
//ed, err := execdrivers.NewDriver(c.ExecDriver, dockerRoot, sysInitPath, sysInfo)
ed, err := execdrivers.NewDriver("native", dockerRoot, sysInitPath, execdriver.NativeExternal, nil)
if err != nil {
return nil, err
}
return ed, nil
}
func NewDaemon(config *Config, registryService *registry.Service) (daemon *Daemon, err error) {
setDefaultMtu(config)
// Ensure we have compatible configuration options
if err := checkConfigOptions(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Verify the platform is supported as a daemon
if runtime.GOOS != "linux" && runtime.GOOS != "windows" {
return nil, ErrSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
setupDumpStackTrap()
// 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 := system.MkdirAll(config.Root, 0700); err != nil {
return nil, err
}
// 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)
// 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
// Ensure the graph driver is shutdown at a later point
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)
// Configure and validate the kernels security support
if err := configureKernelSecuritySupport(config, d.driver.String()); err != nil {
return nil, err
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := system.MkdirAll(daemonRepo, 0700); err != nil {
return nil, err
}
// Migrate the container if it is aufs and aufs is enabled
if err := migrateIfDownlevel(d.driver, config.Root); err != nil {
return nil, err
}
logrus.Debug("Creating images graph")
g, err := graph.NewGraph(filepath.Join(config.Root, "graph"), d.driver)
if err != nil {
return nil, err
}
// Configure the volumes driver
if err := configureVolumes(config); err != nil {
return nil, err
}
trustKey, err := api.LoadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
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(filepath.Join(config.Root, "repositories-"+d.driver.String()), tagCfg)
if err != nil {
return nil, fmt.Errorf("Couldn't create Tag store repositories-%s: %s", d.driver.String(), err)
}
d.netController, err = initNetworkController(config)
if err != nil {
return nil, fmt.Errorf("Error initializing network controller: %v", err)
}
graphdbPath := filepath.Join(config.Root, "linkgraph.db")
graph, err := graphdb.NewSqliteConn(graphdbPath)
if err != nil {
return nil, err
}
d.containerGraph = graph
var sysInitPath string
if config.ExecDriver == "lxc" {
initPath, err := configureSysInit(config)
if err != nil {
return nil, err
}
sysInitPath = initPath
}
sysInfo := sysinfo.New(false)
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux/FreeBSD.
if runtime.GOOS != "windows" && !sysInfo.CgroupDevicesEnabled {
return nil, fmt.Errorf("Devices cgroup isn't mounted")
}
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
go d.execCommandGC()
if err := d.restore(); err != nil {
return nil, err
}
return d, nil
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(config *Config, registryService *registry.Service) (daemon *Daemon, err error) {
setDefaultMtu(config)
// Ensure we have compatible configuration options
if err := checkConfigOptions(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
setupDumpStackTrap()
uidMaps, gidMaps, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootUID, rootGID, err := idtools.GetRootUIDGID(uidMaps, gidMaps)
if err != nil {
return nil, err
}
// 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)
}
}
if err = setupDaemonRoot(config, realRoot, rootUID, rootGID); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := tempDir(config.Root, rootUID, rootGID)
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)
// Set the default driver
graphdriver.DefaultDriver = config.GraphDriver
// Load storage driver
driver, err := graphdriver.New(config.Root, config.GraphOptions, uidMaps, gidMaps)
if err != nil {
return nil, fmt.Errorf("error initializing graphdriver: %v", err)
}
logrus.Debugf("Using graph driver %s", driver)
d := &Daemon{}
d.driver = driver
// Ensure the graph driver is shutdown at a later point
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)
// Configure and validate the kernels security support
if err := configureKernelSecuritySupport(config, d.driver.String()); err != nil {
return nil, err
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAs(daemonRepo, 0700, rootUID, rootGID); err != nil && !os.IsExist(err) {
return nil, err
}
// Migrate the container if it is aufs and aufs is enabled
if err := migrateIfDownlevel(d.driver, config.Root); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.driver.String())
fms, err := layer.NewFSMetadataStore(filepath.Join(imageRoot, "layerdb"))
if err != nil {
return nil, err
}
d.layerStore, err = layer.NewStore(fms, d.driver)
if err != nil {
return nil, err
}
d.downloadManager = xfer.NewLayerDownloadManager(d.layerStore, maxDownloadConcurrency)
d.uploadManager = xfer.NewLayerUploadManager(maxUploadConcurrency)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
d.imageStore, err = image.NewImageStore(ifs, d.layerStore)
if err != nil {
return nil, err
}
// Configure the volumes driver
volStore, err := configureVolumes(config, rootUID, rootGID)
if err != nil {
return nil, err
}
trustKey, err := api.LoadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
eventsService := events.New()
tagStore, err := tag.NewTagStore(filepath.Join(imageRoot, "repositories.json"))
if err != nil {
return nil, fmt.Errorf("Couldn't create Tag store repositories: %s", err)
}
if err := restoreCustomImage(d.driver, d.imageStore, d.layerStore, tagStore); err != nil {
return nil, fmt.Errorf("Couldn't restore custom images: %s", err)
}
if err := v1.Migrate(config.Root, d.driver.String(), d.layerStore, d.imageStore, tagStore, distributionMetadataStore); err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as its read-only
// DiscoveryWatcher version.
if config.ClusterStore != "" && config.ClusterAdvertise != "" {
advertise, err := discovery.ParseAdvertise(config.ClusterStore, config.ClusterAdvertise)
if err != nil {
return nil, fmt.Errorf("discovery advertise parsing failed (%v)", err)
}
config.ClusterAdvertise = advertise
d.discoveryWatcher, err = initDiscovery(config.ClusterStore, config.ClusterAdvertise, config.ClusterOpts)
if err != nil {
return nil, fmt.Errorf("discovery initialization failed (%v)", err)
}
} else if config.ClusterAdvertise != "" {
return nil, fmt.Errorf("invalid cluster configuration. --cluster-advertise must be accompanied by --cluster-store configuration")
}
d.netController, err = d.initNetworkController(config)
if err != nil {
return nil, fmt.Errorf("Error initializing network controller: %v", err)
}
graphdbPath := filepath.Join(config.Root, "linkgraph.db")
graph, err := graphdb.NewSqliteConn(graphdbPath)
if err != nil {
return nil, err
}
d.containerGraphDB = graph
sysInfo := sysinfo.New(false)
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux/FreeBSD.
if runtime.GOOS != "windows" && !sysInfo.CgroupDevicesEnabled {
return nil, fmt.Errorf("Devices cgroup isn't mounted")
}
ed, err := execdrivers.NewDriver(config.ExecOptions, config.ExecRoot, config.Root, sysInfo)
if err != nil {
return nil, err
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = &contStore{s: make(map[string]*container.Container)}
d.execCommands = exec.NewStore()
d.tagStore = tagStore
d.distributionMetadataStore = distributionMetadataStore
d.trustKey = trustKey
d.idIndex = truncindex.NewTruncIndex([]string{})
d.configStore = config
d.execDriver = ed
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.defaultLogConfig = config.LogConfig
d.RegistryService = registryService
d.EventsService = eventsService
d.volumes = volStore
d.root = config.Root
d.uidMaps = uidMaps
d.gidMaps = gidMaps
if err := d.cleanupMounts(); err != nil {
return nil, err
}
go d.execCommandGC()
if err := d.restore(); err != nil {
return nil, err
}
return d, nil
}
func NewDaemonFromDirectory(config *Config, eng *engine.Engine) (*Daemon, error) {
if config.Mtu == 0 {
config.Mtu = getDefaultNetworkMtu()
}
// Check for mutually incompatible config options
if config.BridgeIface != "" && config.BridgeIP != "" {
return nil, fmt.Errorf("You specified -b & --bip, mutually exclusive options. Please specify only one.")
}
if !config.EnableIptables && !config.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.EnableIptables && config.EnableIpMasq {
config.EnableIpMasq = false
}
config.DisableNetwork = config.BridgeIface == disableNetworkBridge
// Claim the pidfile first, to avoid any and all unexpected race conditions.
// Some of the init doesn't need a pidfile lock - but let's not try to be smart.
if config.Pidfile != "" {
if err := utils.CreatePidFile(config.Pidfile); err != nil {
return nil, err
}
eng.OnShutdown(func() {
// Always release the pidfile last, just in case
utils.RemovePidFile(config.Pidfile)
})
}
// 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 := checkKernelAndArch(); err != nil {
return nil, err
}
// set up the TempDir to use a canonical path
tmp, err := utils.TempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := utils.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)
if !config.EnableSelinuxSupport {
selinuxSetDisabled()
}
// 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 = utils.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, err
}
log.Debugf("Using graph driver %s", driver)
// As Docker on btrfs and SELinux are incompatible at present, error on both being enabled
if selinuxEnabled() && config.EnableSelinuxSupport && driver.String() == "btrfs" {
return nil, fmt.Errorf("SELinux is not supported with the BTRFS graph driver!")
}
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(driver, config.Root); err != nil {
return nil, err
}
log.Debugf("Creating images graph")
g, err := graph.NewGraph(path.Join(config.Root, "graph"), driver)
if err != nil {
return nil, err
}
volumesDriver, err := graphdriver.GetDriver("vfs", config.Root, config.GraphOptions)
if err != nil {
return nil, err
}
volumes, err := volumes.NewRepository(path.Join(config.Root, "volumes"), volumesDriver)
if err != nil {
return nil, err
}
trustKey, err := api.LoadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
log.Debugf("Creating repository list")
repositories, err := graph.NewTagStore(path.Join(config.Root, "repositories-"+driver.String()), g, trustKey)
if err != nil {
return nil, fmt.Errorf("Couldn't create Tag store: %s", err)
}
trustDir := path.Join(config.Root, "trust")
if err := os.MkdirAll(trustDir, 0700); err != nil && !os.IsExist(err) {
return nil, err
}
t, err := trust.NewTrustStore(trustDir)
if err != nil {
return nil, fmt.Errorf("could not create trust store: %s", err)
}
if !config.DisableNetwork {
job := eng.Job("init_networkdriver")
job.SetenvBool("EnableIptables", config.EnableIptables)
job.SetenvBool("InterContainerCommunication", config.InterContainerCommunication)
job.SetenvBool("EnableIpForward", config.EnableIpForward)
job.SetenvBool("EnableIpMasq", config.EnableIpMasq)
job.SetenvBool("EnableIPv6", config.EnableIPv6)
job.Setenv("BridgeIface", config.BridgeIface)
job.Setenv("BridgeIP", config.BridgeIP)
job.Setenv("FixedCIDR", config.FixedCIDR)
job.Setenv("FixedCIDRv6", config.FixedCIDRv6)
job.Setenv("DefaultBindingIP", config.DefaultIp.String())
if err := job.Run(); err != nil {
return nil, err
}
}
graphdbPath := path.Join(config.Root, "linkgraph.db")
graph, err := graphdb.NewSqliteConn(graphdbPath)
if err != nil {
return nil, err
}
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 http://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 := utils.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.Root, sysInitPath, sysInfo)
if err != nil {
return nil, err
}
daemon := &Daemon{
ID: trustKey.PublicKey().KeyID(),
repository: daemonRepo,
containers: &contStore{s: make(map[string]*Container)},
execCommands: newExecStore(),
graph: g,
repositories: repositories,
idIndex: truncindex.NewTruncIndex([]string{}),
sysInfo: sysInfo,
volumes: volumes,
config: config,
containerGraph: graph,
driver: driver,
sysInitPath: sysInitPath,
execDriver: ed,
eng: eng,
trustStore: t,
}
if err := daemon.restore(); err != nil {
return nil, err
}
// set up filesystem watch on resolv.conf for network changes
if err := daemon.setupResolvconfWatcher(); err != nil {
return nil, err
}
// Setup shutdown handlers
// FIXME: can these shutdown handlers be registered closer to their source?
eng.OnShutdown(func() {
// FIXME: if these cleanup steps can be called concurrently, register
// them as separate handlers to speed up total shutdown time
if err := daemon.shutdown(); err != nil {
log.Errorf("daemon.shutdown(): %s", err)
}
if err := portallocator.ReleaseAll(); err != nil {
log.Errorf("portallocator.ReleaseAll(): %s", err)
}
if err := daemon.driver.Cleanup(); err != nil {
log.Errorf("daemon.driver.Cleanup(): %s", err.Error())
}
if err := daemon.containerGraph.Close(); err != nil {
log.Errorf("daemon.containerGraph.Close(): %s", err.Error())
}
})
return daemon, nil
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(config *Config, registryService *registry.Service) (daemon *Daemon, err error) {
setDefaultMtu(config)
// Ensure we have compatible configuration options
if err := checkConfigOptions(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
setupDumpStackTrap()
uidMaps, gidMaps, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootUID, rootGID, err := idtools.GetRootUIDGID(uidMaps, gidMaps)
if err != nil {
return nil, err
}
// 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)
}
}
if err = setupDaemonRoot(config, realRoot, rootUID, rootGID); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := tempDir(config.Root, rootUID, rootGID)
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)
d := &Daemon{}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
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)
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAs(daemonRepo, 0700, rootUID, rootGID); err != nil && !os.IsExist(err) {
return nil, err
}
driverName := os.Getenv("DOCKER_DRIVER")
if driverName == "" {
driverName = config.GraphDriver
}
d.layerStore, err = layer.NewStoreFromOptions(layer.StoreOptions{
StorePath: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: driverName,
GraphDriverOptions: config.GraphOptions,
UIDMaps: uidMaps,
GIDMaps: gidMaps,
})
if err != nil {
return nil, err
}
graphDriver := d.layerStore.DriverName()
imageRoot := filepath.Join(config.Root, "image", graphDriver)
// Configure and validate the kernels security support
if err := configureKernelSecuritySupport(config, graphDriver); err != nil {
return nil, err
}
d.downloadManager = xfer.NewLayerDownloadManager(d.layerStore, maxDownloadConcurrency)
d.uploadManager = xfer.NewLayerUploadManager(maxUploadConcurrency)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
d.imageStore, err = image.NewImageStore(ifs, d.layerStore)
if err != nil {
return nil, err
}
// Configure the volumes driver
volStore, err := configureVolumes(config, rootUID, rootGID)
if err != nil {
return nil, err
}
trustKey, err := api.LoadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
eventsService := events.New()
referenceStore, err := reference.NewReferenceStore(filepath.Join(imageRoot, "repositories.json"))
if err != nil {
return nil, fmt.Errorf("Couldn't create Tag store repositories: %s", err)
}
if err := restoreCustomImage(d.imageStore, d.layerStore, referenceStore); err != nil {
return nil, fmt.Errorf("Couldn't restore custom images: %s", err)
}
migrationStart := time.Now()
if err := v1.Migrate(config.Root, graphDriver, d.layerStore, d.imageStore, referenceStore, distributionMetadataStore); err != nil {
return nil, err
}
logrus.Infof("Graph migration to content-addressability took %.2f seconds", time.Since(migrationStart).Seconds())
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as its read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
d.netController, err = d.initNetworkController(config)
if err != nil {
return nil, fmt.Errorf("Error initializing network controller: %v", err)
}
sysInfo := sysinfo.New(false)
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux/FreeBSD.
if runtime.GOOS != "windows" && !sysInfo.CgroupDevicesEnabled {
return nil, fmt.Errorf("Devices cgroup isn't mounted")
}
ed, err := execdrivers.NewDriver(config.ExecOptions, config.ExecRoot, config.Root, sysInfo)
if err != nil {
return nil, err
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
d.execCommands = exec.NewStore()
d.referenceStore = referenceStore
d.distributionMetadataStore = distributionMetadataStore
d.trustKey = trustKey
d.idIndex = truncindex.NewTruncIndex([]string{})
d.configStore = config
d.execDriver = ed
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.defaultLogConfig = containertypes.LogConfig{
Type: config.LogConfig.Type,
Config: config.LogConfig.Config,
}
d.RegistryService = registryService
d.EventsService = eventsService
d.volumes = volStore
d.root = config.Root
d.uidMaps = uidMaps
d.gidMaps = gidMaps
d.seccompEnabled = sysInfo.Seccomp
d.nameIndex = registrar.NewRegistrar()
d.linkIndex = newLinkIndex()
if err := d.cleanupMounts(); err != nil {
return nil, err
}
go d.execCommandGC()
if err := d.restore(); err != nil {
return nil, err
}
return d, nil
}
func NewDaemonFromDirectory(config *daemonconfig.Config, eng *engine.Engine) (*Daemon, error) {
if runtime.GOOS != "linux" {
log.Fatalf("The Docker daemon is only supported on linux")
}
if os.Geteuid() != 0 {
log.Fatalf("The Docker daemon needs to be run as root")
}
if err := checkKernelAndArch(); err != nil {
log.Fatal(err)
}
// set up the TempDir to use a canonical path
tmp, err := utils.TempDir(config.Root)
if err != nil {
log.Fatalf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := utils.ReadSymlinkedDirectory(tmp)
if err != nil {
log.Fatalf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
os.Setenv("TMPDIR", realTmp)
if !config.EnableSelinuxSupport {
selinuxSetDisabled()
}
// 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 = utils.ReadSymlinkedDirectory(config.Root)
if err != nil {
log.Fatalf("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, err
}
utils.Debugf("Using graph driver %s", driver)
// As Docker on btrfs and SELinux are incompatible at present, error on both being enabled
if config.EnableSelinuxSupport && driver.String() == "btrfs" {
return nil, fmt.Errorf("SELinux is not supported with the BTRFS graph driver!")
}
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(driver, config.Root); err != nil {
return nil, err
}
utils.Debugf("Creating images graph")
g, err := graph.NewGraph(path.Join(config.Root, "graph"), driver)
if err != nil {
return nil, err
}
// We don't want to use a complex driver like aufs or devmapper
// for volumes, just a plain filesystem
volumesDriver, err := graphdriver.GetDriver("vfs", config.Root, config.GraphOptions)
if err != nil {
return nil, err
}
utils.Debugf("Creating volumes graph")
volumes, err := graph.NewGraph(path.Join(config.Root, "volumes"), volumesDriver)
if err != nil {
return nil, err
}
utils.Debugf("Creating repository list")
repositories, err := graph.NewTagStore(path.Join(config.Root, "repositories-"+driver.String()), g)
if err != nil {
return nil, fmt.Errorf("Couldn't create Tag store: %s", err)
}
if !config.DisableNetwork {
job := eng.Job("init_networkdriver")
job.SetenvBool("EnableIptables", config.EnableIptables)
job.SetenvBool("InterContainerCommunication", config.InterContainerCommunication)
job.SetenvBool("EnableIpForward", config.EnableIpForward)
job.Setenv("BridgeIface", config.BridgeIface)
job.Setenv("BridgeIP", config.BridgeIP)
job.Setenv("DefaultBindingIP", config.DefaultIp.String())
if err := job.Run(); err != nil {
return nil, err
}
}
graphdbPath := path.Join(config.Root, "linkgraph.db")
graph, err := graphdb.NewSqliteConn(graphdbPath)
if err != nil {
return nil, err
}
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 http://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 := utils.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.Root, sysInitPath, sysInfo)
if err != nil {
return nil, err
}
daemon := &Daemon{
repository: daemonRepo,
containers: &contStore{s: make(map[string]*Container)},
graph: g,
repositories: repositories,
idIndex: truncindex.NewTruncIndex([]string{}),
sysInfo: sysInfo,
volumes: volumes,
config: config,
containerGraph: graph,
driver: driver,
sysInitPath: sysInitPath,
execDriver: ed,
eng: eng,
Sockets: config.Sockets,
}
if err := daemon.checkLocaldns(); err != nil {
return nil, err
}
if err := daemon.restore(); err != nil {
return nil, err
}
return daemon, nil
}
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
}