func parseClusterAdvertiseSettings(clusterStore, clusterAdvertise string) (string, error) {
if clusterAdvertise == "" {
return "", errDiscoveryDisabled
}
if clusterStore == "" {
return "", fmt.Errorf("invalid cluster configuration. --cluster-advertise must be accompanied by --cluster-store configuration")
}
advertise, err := discovery.ParseAdvertise(clusterAdvertise)
if err != nil {
return "", fmt.Errorf("discovery advertise parsing failed (%v)", err)
}
return advertise, nil
}
func parseClusterAdvertiseSettings(clusterStore, clusterAdvertise string) (string, error) {
if runtime.GOOS == "solaris" && (clusterAdvertise != "" || clusterStore != "") {
return "", errors.New("Cluster Advertise Settings not supported on Solaris")
}
if clusterAdvertise == "" {
return "", errDiscoveryDisabled
}
if clusterStore == "" {
return "", fmt.Errorf("invalid cluster configuration. --cluster-advertise must be accompanied by --cluster-store configuration")
}
advertise, err := discovery.ParseAdvertise(clusterAdvertise)
if err != nil {
return "", fmt.Errorf("discovery advertise parsing failed (%v)", err)
}
return advertise, 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
}