| package daemon |
| |
| import ( |
| "fmt" |
| "io" |
| "io/ioutil" |
| "log" |
| "os" |
| "path" |
| "regexp" |
| "strings" |
| "sync" |
| "time" |
| |
| "github.com/docker/libcontainer/label" |
| "github.com/docker/libcontainer/selinux" |
| "github.com/dotcloud/docker/archive" |
| "github.com/dotcloud/docker/daemon/execdriver" |
| "github.com/dotcloud/docker/daemon/execdriver/execdrivers" |
| "github.com/dotcloud/docker/daemon/execdriver/lxc" |
| "github.com/dotcloud/docker/daemon/graphdriver" |
| _ "github.com/dotcloud/docker/daemon/graphdriver/vfs" |
| _ "github.com/dotcloud/docker/daemon/networkdriver/bridge" |
| "github.com/dotcloud/docker/daemon/networkdriver/portallocator" |
| "github.com/dotcloud/docker/daemonconfig" |
| "github.com/dotcloud/docker/dockerversion" |
| "github.com/dotcloud/docker/engine" |
| "github.com/dotcloud/docker/graph" |
| "github.com/dotcloud/docker/image" |
| "github.com/dotcloud/docker/pkg/graphdb" |
| "github.com/dotcloud/docker/pkg/namesgenerator" |
| "github.com/dotcloud/docker/pkg/networkfs/resolvconf" |
| "github.com/dotcloud/docker/pkg/sysinfo" |
| "github.com/dotcloud/docker/pkg/truncindex" |
| "github.com/dotcloud/docker/runconfig" |
| "github.com/dotcloud/docker/utils" |
| ) |
| |
| // Set the max depth to the aufs default that most |
| // kernels are compiled with |
| // For more information see: http://sourceforge.net/p/aufs/aufs3-standalone/ci/aufs3.12/tree/config.mk |
| const MaxImageDepth = 127 |
| |
| var ( |
| DefaultDns = []string{"8.8.8.8", "8.8.4.4"} |
| validContainerNameChars = `[a-zA-Z0-9_.-]` |
| validContainerNamePattern = regexp.MustCompile(`^/?` + validContainerNameChars + `+$`) |
| ) |
| |
| type contStore struct { |
| s map[string]*Container |
| sync.Mutex |
| } |
| |
| func (c *contStore) Add(id string, cont *Container) { |
| c.Lock() |
| c.s[id] = cont |
| c.Unlock() |
| } |
| |
| func (c *contStore) Get(id string) *Container { |
| c.Lock() |
| res := c.s[id] |
| c.Unlock() |
| return res |
| } |
| |
| func (c *contStore) Delete(id string) { |
| c.Lock() |
| delete(c.s, id) |
| c.Unlock() |
| } |
| |
| func (c *contStore) List() []*Container { |
| containers := new(History) |
| c.Lock() |
| for _, cont := range c.s { |
| containers.Add(cont) |
| } |
| c.Unlock() |
| containers.Sort() |
| return *containers |
| } |
| |
| type Daemon struct { |
| repository string |
| sysInitPath string |
| containers *contStore |
| graph *graph.Graph |
| repositories *graph.TagStore |
| idIndex *truncindex.TruncIndex |
| sysInfo *sysinfo.SysInfo |
| volumes *graph.Graph |
| srv Server |
| eng *engine.Engine |
| config *daemonconfig.Config |
| containerGraph *graphdb.Database |
| driver graphdriver.Driver |
| execDriver execdriver.Driver |
| Sockets []string |
| } |
| |
| // Install installs daemon capabilities to eng. |
| func (daemon *Daemon) Install(eng *engine.Engine) error { |
| return eng.Register("container_inspect", daemon.ContainerInspect) |
| } |
| |
| // List returns an array of all containers registered in the daemon. |
| func (daemon *Daemon) List() []*Container { |
| return daemon.containers.List() |
| } |
| |
| // Get looks for a container by the specified ID or name, and returns it. |
| // If the container is not found, or if an error occurs, nil is returned. |
| func (daemon *Daemon) Get(name string) *Container { |
| if c, _ := daemon.GetByName(name); c != nil { |
| return c |
| } |
| |
| id, err := daemon.idIndex.Get(name) |
| if err != nil { |
| return nil |
| } |
| |
| return daemon.containers.Get(id) |
| } |
| |
| // Exists returns a true if a container of the specified ID or name exists, |
| // false otherwise. |
| func (daemon *Daemon) Exists(id string) bool { |
| return daemon.Get(id) != nil |
| } |
| |
| func (daemon *Daemon) containerRoot(id string) string { |
| return path.Join(daemon.repository, id) |
| } |
| |
| // Load reads the contents of a container from disk |
| // This is typically done at startup. |
| func (daemon *Daemon) load(id string) (*Container, error) { |
| container := &Container{root: daemon.containerRoot(id), State: NewState()} |
| if err := container.FromDisk(); err != nil { |
| return nil, err |
| } |
| if container.ID != id { |
| return container, fmt.Errorf("Container %s is stored at %s", container.ID, id) |
| } |
| return container, nil |
| } |
| |
| // Register makes a container object usable by the daemon as <container.ID> |
| // This is a wrapper for register |
| func (daemon *Daemon) Register(container *Container) error { |
| return daemon.register(container, true, nil) |
| } |
| |
| // register makes a container object usable by the daemon as <container.ID> |
| func (daemon *Daemon) register(container *Container, updateSuffixarray bool, containersToStart *[]*Container) error { |
| if container.daemon != nil || daemon.Exists(container.ID) { |
| return fmt.Errorf("Container is already loaded") |
| } |
| if err := validateID(container.ID); err != nil { |
| return err |
| } |
| if err := daemon.ensureName(container); err != nil { |
| return err |
| } |
| |
| container.daemon = daemon |
| |
| // Attach to stdout and stderr |
| container.stderr = utils.NewWriteBroadcaster() |
| container.stdout = utils.NewWriteBroadcaster() |
| // Attach to stdin |
| if container.Config.OpenStdin { |
| container.stdin, container.stdinPipe = io.Pipe() |
| } else { |
| container.stdinPipe = utils.NopWriteCloser(ioutil.Discard) // Silently drop stdin |
| } |
| // done |
| daemon.containers.Add(container.ID, container) |
| |
| // don't update the Suffixarray if we're starting up |
| // we'll waste time if we update it for every container |
| daemon.idIndex.Add(container.ID) |
| |
| // FIXME: if the container is supposed to be running but is not, auto restart it? |
| // if so, then we need to restart monitor and init a new lock |
| // If the container is supposed to be running, make sure of it |
| if container.State.IsRunning() { |
| utils.Debugf("killing old running container %s", container.ID) |
| |
| existingPid := container.State.Pid |
| container.State.SetStopped(0) |
| |
| // We only have to handle this for lxc because the other drivers will ensure that |
| // no processes are left when docker dies |
| if container.ExecDriver == "" || strings.Contains(container.ExecDriver, "lxc") { |
| lxc.KillLxc(container.ID, 9) |
| } else { |
| // use the current driver and ensure that the container is dead x.x |
| cmd := &execdriver.Command{ |
| ID: container.ID, |
| } |
| var err error |
| cmd.Process, err = os.FindProcess(existingPid) |
| if err != nil { |
| utils.Debugf("cannot find existing process for %d", existingPid) |
| } |
| daemon.execDriver.Terminate(cmd) |
| } |
| if err := container.Unmount(); err != nil { |
| utils.Debugf("unmount error %s", err) |
| } |
| if err := container.ToDisk(); err != nil { |
| utils.Debugf("saving stopped state to disk %s", err) |
| } |
| |
| info := daemon.execDriver.Info(container.ID) |
| if !info.IsRunning() { |
| utils.Debugf("Container %s was supposed to be running but is not.", container.ID) |
| if daemon.config.AutoRestart { |
| utils.Debugf("Marking as restarting") |
| if err := container.Unmount(); err != nil { |
| utils.Debugf("restart unmount error %s", err) |
| } |
| |
| if containersToStart != nil { |
| *containersToStart = append(*containersToStart, container) |
| } |
| } else { |
| utils.Debugf("Marking as stopped") |
| container.State.SetStopped(-127) |
| if err := container.ToDisk(); err != nil { |
| return err |
| } |
| } |
| } |
| } |
| return nil |
| } |
| |
| func (daemon *Daemon) ensureName(container *Container) error { |
| if container.Name == "" { |
| name, err := daemon.generateNewName(container.ID) |
| if err != nil { |
| return err |
| } |
| container.Name = name |
| |
| if err := container.ToDisk(); err != nil { |
| utils.Debugf("Error saving container name %s", err) |
| } |
| } |
| return nil |
| } |
| |
| func (daemon *Daemon) LogToDisk(src *utils.WriteBroadcaster, dst, stream string) error { |
| log, err := os.OpenFile(dst, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600) |
| if err != nil { |
| return err |
| } |
| src.AddWriter(log, stream) |
| return nil |
| } |
| |
| // Destroy unregisters a container from the daemon and cleanly removes its contents from the filesystem. |
| func (daemon *Daemon) Destroy(container *Container) error { |
| if container == nil { |
| return fmt.Errorf("The given container is <nil>") |
| } |
| |
| element := daemon.containers.Get(container.ID) |
| if element == nil { |
| return fmt.Errorf("Container %v not found - maybe it was already destroyed?", container.ID) |
| } |
| |
| if err := container.Stop(3); err != nil { |
| return err |
| } |
| |
| // Deregister the container before removing its directory, to avoid race conditions |
| daemon.idIndex.Delete(container.ID) |
| daemon.containers.Delete(container.ID) |
| |
| if _, err := daemon.containerGraph.Purge(container.ID); err != nil { |
| utils.Debugf("Unable to remove container from link graph: %s", err) |
| } |
| |
| if err := daemon.driver.Remove(container.ID); err != nil { |
| return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", daemon.driver, container.ID, err) |
| } |
| |
| initID := fmt.Sprintf("%s-init", container.ID) |
| if err := daemon.driver.Remove(initID); err != nil { |
| return fmt.Errorf("Driver %s failed to remove init filesystem %s: %s", daemon.driver, initID, err) |
| } |
| |
| if err := os.RemoveAll(container.root); err != nil { |
| return fmt.Errorf("Unable to remove filesystem for %v: %v", container.ID, err) |
| } |
| selinux.FreeLxcContexts(container.ProcessLabel) |
| |
| return nil |
| } |
| |
| func (daemon *Daemon) restore() error { |
| var ( |
| debug = (os.Getenv("DEBUG") != "" || os.Getenv("TEST") != "") |
| containers = make(map[string]*Container) |
| currentDriver = daemon.driver.String() |
| containersToStart = []*Container{} |
| ) |
| |
| if !debug { |
| fmt.Printf("Loading containers: ") |
| } |
| dir, err := ioutil.ReadDir(daemon.repository) |
| if err != nil { |
| return err |
| } |
| |
| for _, v := range dir { |
| id := v.Name() |
| container, err := daemon.load(id) |
| if !debug { |
| fmt.Print(".") |
| } |
| if err != nil { |
| utils.Errorf("Failed to load container %v: %v", id, err) |
| continue |
| } |
| |
| // Ignore the container if it does not support the current driver being used by the graph |
| if container.Driver == "" && currentDriver == "aufs" || container.Driver == currentDriver { |
| utils.Debugf("Loaded container %v", container.ID) |
| containers[container.ID] = container |
| } else { |
| utils.Debugf("Cannot load container %s because it was created with another graph driver.", container.ID) |
| } |
| } |
| |
| if entities := daemon.containerGraph.List("/", -1); entities != nil { |
| for _, p := range entities.Paths() { |
| if !debug { |
| fmt.Print(".") |
| } |
| e := entities[p] |
| if container, ok := containers[e.ID()]; ok { |
| if err := daemon.register(container, false, &containersToStart); err != nil { |
| utils.Debugf("Failed to register container %s: %s", container.ID, err) |
| } |
| delete(containers, e.ID()) |
| } |
| } |
| } |
| |
| // Any containers that are left over do not exist in the graph |
| for _, container := range containers { |
| // Try to set the default name for a container if it exists prior to links |
| container.Name, err = daemon.generateNewName(container.ID) |
| if err != nil { |
| utils.Debugf("Setting default id - %s", err) |
| } |
| if err := daemon.register(container, false, &containersToStart); err != nil { |
| utils.Debugf("Failed to register container %s: %s", container.ID, err) |
| } |
| } |
| |
| for _, container := range containersToStart { |
| utils.Debugf("Starting container %d", container.ID) |
| if err := container.Start(); err != nil { |
| utils.Debugf("Failed to start container %s: %s", container.ID, err) |
| } |
| } |
| |
| if !debug { |
| fmt.Printf(": done.\n") |
| } |
| |
| return nil |
| } |
| |
| // Create creates a new container from the given configuration with a given name. |
| func (daemon *Daemon) Create(config *runconfig.Config, name string) (*Container, []string, error) { |
| var ( |
| container *Container |
| warnings []string |
| ) |
| |
| img, err := daemon.repositories.LookupImage(config.Image) |
| if err != nil { |
| return nil, nil, err |
| } |
| if err := daemon.checkImageDepth(img); err != nil { |
| return nil, nil, err |
| } |
| if warnings, err = daemon.mergeAndVerifyConfig(config, img); err != nil { |
| return nil, nil, err |
| } |
| if container, err = daemon.newContainer(name, config, img); err != nil { |
| return nil, nil, err |
| } |
| if err := daemon.createRootfs(container, img); err != nil { |
| return nil, nil, err |
| } |
| if err := container.ToDisk(); err != nil { |
| return nil, nil, err |
| } |
| if err := daemon.Register(container); err != nil { |
| return nil, nil, err |
| } |
| return container, warnings, nil |
| } |
| |
| func (daemon *Daemon) checkImageDepth(img *image.Image) error { |
| // We add 2 layers to the depth because the container's rw and |
| // init layer add to the restriction |
| depth, err := img.Depth() |
| if err != nil { |
| return err |
| } |
| if depth+2 >= MaxImageDepth { |
| return fmt.Errorf("Cannot create container with more than %d parents", MaxImageDepth) |
| } |
| return nil |
| } |
| |
| func (daemon *Daemon) checkDeprecatedExpose(config *runconfig.Config) bool { |
| if config != nil { |
| if config.PortSpecs != nil { |
| for _, p := range config.PortSpecs { |
| if strings.Contains(p, ":") { |
| return true |
| } |
| } |
| } |
| } |
| return false |
| } |
| |
| func (daemon *Daemon) mergeAndVerifyConfig(config *runconfig.Config, img *image.Image) ([]string, error) { |
| warnings := []string{} |
| if daemon.checkDeprecatedExpose(img.Config) || daemon.checkDeprecatedExpose(config) { |
| warnings = append(warnings, "The mapping to public ports on your host via Dockerfile EXPOSE (host:port:port) has been deprecated. Use -p to publish the ports.") |
| } |
| if img.Config != nil { |
| if err := runconfig.Merge(config, img.Config); err != nil { |
| return nil, err |
| } |
| } |
| if len(config.Entrypoint) == 0 && len(config.Cmd) == 0 { |
| return nil, fmt.Errorf("No command specified") |
| } |
| return warnings, nil |
| } |
| |
| func (daemon *Daemon) generateIdAndName(name string) (string, string, error) { |
| var ( |
| err error |
| id = utils.GenerateRandomID() |
| ) |
| |
| if name == "" { |
| if name, err = daemon.generateNewName(id); err != nil { |
| return "", "", err |
| } |
| return id, name, nil |
| } |
| |
| if name, err = daemon.reserveName(id, name); err != nil { |
| return "", "", err |
| } |
| |
| return id, name, nil |
| } |
| |
| func (daemon *Daemon) reserveName(id, name string) (string, error) { |
| if !validContainerNamePattern.MatchString(name) { |
| return "", fmt.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars) |
| } |
| |
| if name[0] != '/' { |
| name = "/" + name |
| } |
| |
| if _, err := daemon.containerGraph.Set(name, id); err != nil { |
| if !graphdb.IsNonUniqueNameError(err) { |
| return "", err |
| } |
| |
| conflictingContainer, err := daemon.GetByName(name) |
| if err != nil { |
| if strings.Contains(err.Error(), "Could not find entity") { |
| return "", err |
| } |
| |
| // Remove name and continue starting the container |
| if err := daemon.containerGraph.Delete(name); err != nil { |
| return "", err |
| } |
| } else { |
| nameAsKnownByUser := strings.TrimPrefix(name, "/") |
| return "", fmt.Errorf( |
| "Conflict, The name %s is already assigned to %s. You have to delete (or rename) that container to be able to assign %s to a container again.", nameAsKnownByUser, |
| utils.TruncateID(conflictingContainer.ID), nameAsKnownByUser) |
| } |
| } |
| return name, nil |
| } |
| |
| func (daemon *Daemon) generateNewName(id string) (string, error) { |
| var name string |
| for i := 0; i < 6; i++ { |
| name = namesgenerator.GetRandomName(i) |
| if name[0] != '/' { |
| name = "/" + name |
| } |
| |
| if _, err := daemon.containerGraph.Set(name, id); err != nil { |
| if !graphdb.IsNonUniqueNameError(err) { |
| return "", err |
| } |
| continue |
| } |
| return name, nil |
| } |
| |
| name = "/" + utils.TruncateID(id) |
| if _, err := daemon.containerGraph.Set(name, id); err != nil { |
| return "", err |
| } |
| return name, nil |
| } |
| |
| func (daemon *Daemon) generateHostname(id string, config *runconfig.Config) { |
| // Generate default hostname |
| // FIXME: the lxc template no longer needs to set a default hostname |
| if config.Hostname == "" { |
| config.Hostname = id[:12] |
| } |
| } |
| |
| func (daemon *Daemon) getEntrypointAndArgs(config *runconfig.Config) (string, []string) { |
| var ( |
| entrypoint string |
| args []string |
| ) |
| if len(config.Entrypoint) != 0 { |
| entrypoint = config.Entrypoint[0] |
| args = append(config.Entrypoint[1:], config.Cmd...) |
| } else { |
| entrypoint = config.Cmd[0] |
| args = config.Cmd[1:] |
| } |
| return entrypoint, args |
| } |
| |
| func (daemon *Daemon) newContainer(name string, config *runconfig.Config, img *image.Image) (*Container, error) { |
| var ( |
| id string |
| err error |
| ) |
| id, name, err = daemon.generateIdAndName(name) |
| if err != nil { |
| return nil, err |
| } |
| |
| daemon.generateHostname(id, config) |
| entrypoint, args := daemon.getEntrypointAndArgs(config) |
| |
| container := &Container{ |
| // FIXME: we should generate the ID here instead of receiving it as an argument |
| ID: id, |
| Created: time.Now().UTC(), |
| Path: entrypoint, |
| Args: args, //FIXME: de-duplicate from config |
| Config: config, |
| hostConfig: &runconfig.HostConfig{}, |
| Image: img.ID, // Always use the resolved image id |
| NetworkSettings: &NetworkSettings{}, |
| Name: name, |
| Driver: daemon.driver.String(), |
| ExecDriver: daemon.execDriver.Name(), |
| State: NewState(), |
| } |
| container.root = daemon.containerRoot(container.ID) |
| |
| if container.ProcessLabel, container.MountLabel, err = label.GenLabels(""); err != nil { |
| return nil, err |
| } |
| return container, nil |
| } |
| |
| func (daemon *Daemon) createRootfs(container *Container, img *image.Image) error { |
| // Step 1: create the container directory. |
| // This doubles as a barrier to avoid race conditions. |
| if err := os.Mkdir(container.root, 0700); err != nil { |
| return err |
| } |
| initID := fmt.Sprintf("%s-init", container.ID) |
| if err := daemon.driver.Create(initID, img.ID); err != nil { |
| return err |
| } |
| initPath, err := daemon.driver.Get(initID, "") |
| if err != nil { |
| return err |
| } |
| defer daemon.driver.Put(initID) |
| |
| if err := graph.SetupInitLayer(initPath); err != nil { |
| return err |
| } |
| |
| if err := daemon.driver.Create(container.ID, initID); err != nil { |
| return err |
| } |
| return nil |
| } |
| |
| // Commit creates a new filesystem image from the current state of a container. |
| // The image can optionally be tagged into a repository |
| func (daemon *Daemon) Commit(container *Container, repository, tag, comment, author string, pause bool, config *runconfig.Config) (*image.Image, error) { |
| if pause { |
| container.Pause() |
| defer container.Unpause() |
| } |
| |
| if err := container.Mount(); err != nil { |
| return nil, err |
| } |
| defer container.Unmount() |
| |
| rwTar, err := container.ExportRw() |
| if err != nil { |
| return nil, err |
| } |
| defer rwTar.Close() |
| |
| // Create a new image from the container's base layers + a new layer from container changes |
| var ( |
| containerID, containerImage string |
| containerConfig *runconfig.Config |
| ) |
| |
| if container != nil { |
| containerID = container.ID |
| containerImage = container.Image |
| containerConfig = container.Config |
| } |
| |
| img, err := daemon.graph.Create(rwTar, containerID, containerImage, comment, author, containerConfig, config) |
| if err != nil { |
| return nil, err |
| } |
| |
| // Register the image if needed |
| if repository != "" { |
| if err := daemon.repositories.Set(repository, tag, img.ID, true); err != nil { |
| return img, err |
| } |
| } |
| return img, nil |
| } |
| |
| func GetFullContainerName(name string) (string, error) { |
| if name == "" { |
| return "", fmt.Errorf("Container name cannot be empty") |
| } |
| if name[0] != '/' { |
| name = "/" + name |
| } |
| return name, nil |
| } |
| |
| func (daemon *Daemon) GetByName(name string) (*Container, error) { |
| fullName, err := GetFullContainerName(name) |
| if err != nil { |
| return nil, err |
| } |
| entity := daemon.containerGraph.Get(fullName) |
| if entity == nil { |
| return nil, fmt.Errorf("Could not find entity for %s", name) |
| } |
| e := daemon.containers.Get(entity.ID()) |
| if e == nil { |
| return nil, fmt.Errorf("Could not find container for entity id %s", entity.ID()) |
| } |
| return e, nil |
| } |
| |
| func (daemon *Daemon) Children(name string) (map[string]*Container, error) { |
| name, err := GetFullContainerName(name) |
| if err != nil { |
| return nil, err |
| } |
| children := make(map[string]*Container) |
| |
| err = daemon.containerGraph.Walk(name, func(p string, e *graphdb.Entity) error { |
| c := daemon.Get(e.ID()) |
| if c == nil { |
| return fmt.Errorf("Could not get container for name %s and id %s", e.ID(), p) |
| } |
| children[p] = c |
| return nil |
| }, 0) |
| |
| if err != nil { |
| return nil, err |
| } |
| return children, nil |
| } |
| |
| func (daemon *Daemon) RegisterLink(parent, child *Container, alias string) error { |
| fullName := path.Join(parent.Name, alias) |
| if !daemon.containerGraph.Exists(fullName) { |
| _, err := daemon.containerGraph.Set(fullName, child.ID) |
| return err |
| } |
| return nil |
| } |
| |
| func (daemon *Daemon) RegisterLinks(container *Container, hostConfig *runconfig.HostConfig) error { |
| if hostConfig != nil && hostConfig.Links != nil { |
| for _, l := range hostConfig.Links { |
| parts, err := utils.PartParser("name:alias", l) |
| if err != nil { |
| return err |
| } |
| child, err := daemon.GetByName(parts["name"]) |
| if err != nil { |
| return err |
| } |
| if child == nil { |
| return fmt.Errorf("Could not get container for %s", parts["name"]) |
| } |
| if err := daemon.RegisterLink(container, child, parts["alias"]); err != nil { |
| return err |
| } |
| } |
| |
| // After we load all the links into the daemon |
| // set them to nil on the hostconfig |
| hostConfig.Links = nil |
| if err := container.WriteHostConfig(); err != nil { |
| return err |
| } |
| } |
| return nil |
| } |
| |
| // FIXME: harmonize with NewGraph() |
| func NewDaemon(config *daemonconfig.Config, eng *engine.Engine) (*Daemon, error) { |
| daemon, err := NewDaemonFromDirectory(config, eng) |
| if err != nil { |
| return nil, err |
| } |
| return daemon, nil |
| } |
| |
| func NewDaemonFromDirectory(config *daemonconfig.Config, eng *engine.Engine) (*Daemon, error) { |
| if !config.EnableSelinuxSupport { |
| selinux.SetDisabled() |
| } |
| |
| // 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) |
| |
| 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 (daemon *Daemon) shutdown() error { |
| group := sync.WaitGroup{} |
| utils.Debugf("starting clean shutdown of all containers...") |
| for _, container := range daemon.List() { |
| c := container |
| if c.State.IsRunning() { |
| utils.Debugf("stopping %s", c.ID) |
| group.Add(1) |
| |
| go func() { |
| defer group.Done() |
| if err := c.KillSig(15); err != nil { |
| utils.Debugf("kill 15 error for %s - %s", c.ID, err) |
| } |
| c.State.WaitStop(-1 * time.Second) |
| utils.Debugf("container stopped %s", c.ID) |
| }() |
| } |
| } |
| group.Wait() |
| |
| return nil |
| } |
| |
| func (daemon *Daemon) Close() error { |
| errorsStrings := []string{} |
| if err := daemon.shutdown(); err != nil { |
| utils.Errorf("daemon.shutdown(): %s", err) |
| errorsStrings = append(errorsStrings, err.Error()) |
| } |
| if err := portallocator.ReleaseAll(); err != nil { |
| utils.Errorf("portallocator.ReleaseAll(): %s", err) |
| errorsStrings = append(errorsStrings, err.Error()) |
| } |
| if err := daemon.driver.Cleanup(); err != nil { |
| utils.Errorf("daemon.driver.Cleanup(): %s", err.Error()) |
| errorsStrings = append(errorsStrings, err.Error()) |
| } |
| if err := daemon.containerGraph.Close(); err != nil { |
| utils.Errorf("daemon.containerGraph.Close(): %s", err.Error()) |
| errorsStrings = append(errorsStrings, err.Error()) |
| } |
| if len(errorsStrings) > 0 { |
| return fmt.Errorf("%s", strings.Join(errorsStrings, ", ")) |
| } |
| return nil |
| } |
| |
| func (daemon *Daemon) Mount(container *Container) error { |
| dir, err := daemon.driver.Get(container.ID, container.GetMountLabel()) |
| if err != nil { |
| return fmt.Errorf("Error getting container %s from driver %s: %s", container.ID, daemon.driver, err) |
| } |
| if container.basefs == "" { |
| container.basefs = dir |
| } else if container.basefs != dir { |
| return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')", |
| daemon.driver, container.ID, container.basefs, dir) |
| } |
| return nil |
| } |
| |
| func (daemon *Daemon) Unmount(container *Container) error { |
| daemon.driver.Put(container.ID) |
| return nil |
| } |
| |
| func (daemon *Daemon) Changes(container *Container) ([]archive.Change, error) { |
| if differ, ok := daemon.driver.(graphdriver.Differ); ok { |
| return differ.Changes(container.ID) |
| } |
| cDir, err := daemon.driver.Get(container.ID, "") |
| if err != nil { |
| return nil, fmt.Errorf("Error getting container rootfs %s from driver %s: %s", container.ID, container.daemon.driver, err) |
| } |
| defer daemon.driver.Put(container.ID) |
| initDir, err := daemon.driver.Get(container.ID+"-init", "") |
| if err != nil { |
| return nil, fmt.Errorf("Error getting container init rootfs %s from driver %s: %s", container.ID, container.daemon.driver, err) |
| } |
| defer daemon.driver.Put(container.ID + "-init") |
| return archive.ChangesDirs(cDir, initDir) |
| } |
| |
| func (daemon *Daemon) Diff(container *Container) (archive.Archive, error) { |
| if differ, ok := daemon.driver.(graphdriver.Differ); ok { |
| return differ.Diff(container.ID) |
| } |
| |
| changes, err := daemon.Changes(container) |
| if err != nil { |
| return nil, err |
| } |
| |
| cDir, err := daemon.driver.Get(container.ID, "") |
| if err != nil { |
| return nil, fmt.Errorf("Error getting container rootfs %s from driver %s: %s", container.ID, container.daemon.driver, err) |
| } |
| |
| archive, err := archive.ExportChanges(cDir, changes) |
| if err != nil { |
| return nil, err |
| } |
| return utils.NewReadCloserWrapper(archive, func() error { |
| err := archive.Close() |
| daemon.driver.Put(container.ID) |
| return err |
| }), nil |
| } |
| |
| func (daemon *Daemon) Run(c *Container, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) { |
| return daemon.execDriver.Run(c.command, pipes, startCallback) |
| } |
| |
| func (daemon *Daemon) Pause(c *Container) error { |
| if err := daemon.execDriver.Pause(c.command); err != nil { |
| return err |
| } |
| c.State.SetPaused() |
| return nil |
| } |
| |
| func (daemon *Daemon) Unpause(c *Container) error { |
| if err := daemon.execDriver.Unpause(c.command); err != nil { |
| return err |
| } |
| c.State.SetUnpaused() |
| return nil |
| } |
| |
| func (daemon *Daemon) Kill(c *Container, sig int) error { |
| return daemon.execDriver.Kill(c.command, sig) |
| } |
| |
| // Nuke kills all containers then removes all content |
| // from the content root, including images, volumes and |
| // container filesystems. |
| // Again: this will remove your entire docker daemon! |
| func (daemon *Daemon) Nuke() error { |
| var wg sync.WaitGroup |
| for _, container := range daemon.List() { |
| wg.Add(1) |
| go func(c *Container) { |
| c.Kill() |
| wg.Done() |
| }(container) |
| } |
| wg.Wait() |
| daemon.Close() |
| |
| return os.RemoveAll(daemon.config.Root) |
| } |
| |
| // FIXME: this is a convenience function for integration tests |
| // which need direct access to daemon.graph. |
| // Once the tests switch to using engine and jobs, this method |
| // can go away. |
| func (daemon *Daemon) Graph() *graph.Graph { |
| return daemon.graph |
| } |
| |
| func (daemon *Daemon) Repositories() *graph.TagStore { |
| return daemon.repositories |
| } |
| |
| func (daemon *Daemon) Config() *daemonconfig.Config { |
| return daemon.config |
| } |
| |
| func (daemon *Daemon) SystemConfig() *sysinfo.SysInfo { |
| return daemon.sysInfo |
| } |
| |
| func (daemon *Daemon) SystemInitPath() string { |
| return daemon.sysInitPath |
| } |
| |
| func (daemon *Daemon) GraphDriver() graphdriver.Driver { |
| return daemon.driver |
| } |
| |
| func (daemon *Daemon) ExecutionDriver() execdriver.Driver { |
| return daemon.execDriver |
| } |
| |
| func (daemon *Daemon) Volumes() *graph.Graph { |
| return daemon.volumes |
| } |
| |
| func (daemon *Daemon) ContainerGraph() *graphdb.Database { |
| return daemon.containerGraph |
| } |
| |
| func (daemon *Daemon) SetServer(server Server) { |
| daemon.srv = server |
| } |
| |
| func (daemon *Daemon) checkLocaldns() error { |
| resolvConf, err := resolvconf.Get() |
| if err != nil { |
| return err |
| } |
| if len(daemon.config.Dns) == 0 && utils.CheckLocalDns(resolvConf) { |
| log.Printf("Local (127.0.0.1) DNS resolver found in resolv.conf and containers can't use it. Using default external servers : %v\n", DefaultDns) |
| daemon.config.Dns = DefaultDns |
| } |
| return nil |
| } |