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-rw-r--r--runtime/runtime.go993
1 files changed, 993 insertions, 0 deletions
diff --git a/runtime/runtime.go b/runtime/runtime.go
new file mode 100644
index 0000000000..98903cfa08
--- /dev/null
+++ b/runtime/runtime.go
@@ -0,0 +1,993 @@
+package runtime
+
+import (
+ "container/list"
+ "fmt"
+ "github.com/dotcloud/docker/archive"
+ "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/mount"
+ "github.com/dotcloud/docker/pkg/selinux"
+ "github.com/dotcloud/docker/pkg/sysinfo"
+ "github.com/dotcloud/docker/runconfig"
+ "github.com/dotcloud/docker/runtime/execdriver"
+ "github.com/dotcloud/docker/runtime/execdriver/execdrivers"
+ "github.com/dotcloud/docker/runtime/execdriver/lxc"
+ "github.com/dotcloud/docker/runtime/graphdriver"
+ _ "github.com/dotcloud/docker/runtime/graphdriver/vfs"
+ _ "github.com/dotcloud/docker/runtime/networkdriver/bridge"
+ "github.com/dotcloud/docker/runtime/networkdriver/portallocator"
+ "github.com/dotcloud/docker/utils"
+ "io"
+ "io/ioutil"
+ "log"
+ "os"
+ "path"
+ "regexp"
+ "strings"
+ "sync"
+ "time"
+)
+
+// 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 Runtime struct {
+ repository string
+ sysInitPath string
+ containers *list.List
+ graph *graph.Graph
+ repositories *graph.TagStore
+ idIndex *utils.TruncIndex
+ sysInfo *sysinfo.SysInfo
+ volumes *graph.Graph
+ srv Server
+ eng *engine.Engine
+ config *daemonconfig.Config
+ containerGraph *graphdb.Database
+ driver graphdriver.Driver
+ execDriver execdriver.Driver
+}
+
+// Mountpoints should be private to the container
+func remountPrivate(mountPoint string) error {
+ mounted, err := mount.Mounted(mountPoint)
+ if err != nil {
+ return err
+ }
+
+ if !mounted {
+ if err := mount.Mount(mountPoint, mountPoint, "none", "bind,rw"); err != nil {
+ return err
+ }
+ }
+ return mount.ForceMount("", mountPoint, "none", "private")
+}
+
+// List returns an array of all containers registered in the runtime.
+func (runtime *Runtime) List() []*Container {
+ containers := new(History)
+ for e := runtime.containers.Front(); e != nil; e = e.Next() {
+ containers.Add(e.Value.(*Container))
+ }
+ return *containers
+}
+
+func (runtime *Runtime) getContainerElement(id string) *list.Element {
+ for e := runtime.containers.Front(); e != nil; e = e.Next() {
+ container := e.Value.(*Container)
+ if container.ID == id {
+ return e
+ }
+ }
+ return nil
+}
+
+// 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 (runtime *Runtime) Get(name string) *Container {
+ if c, _ := runtime.GetByName(name); c != nil {
+ return c
+ }
+
+ id, err := runtime.idIndex.Get(name)
+ if err != nil {
+ return nil
+ }
+
+ e := runtime.getContainerElement(id)
+ if e == nil {
+ return nil
+ }
+ return e.Value.(*Container)
+}
+
+// Exists returns a true if a container of the specified ID or name exists,
+// false otherwise.
+func (runtime *Runtime) Exists(id string) bool {
+ return runtime.Get(id) != nil
+}
+
+func (runtime *Runtime) containerRoot(id string) string {
+ return path.Join(runtime.repository, id)
+}
+
+// Load reads the contents of a container from disk
+// This is typically done at startup.
+func (runtime *Runtime) load(id string) (*Container, error) {
+ container := &Container{root: runtime.containerRoot(id)}
+ 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)
+ }
+ if container.State.IsRunning() {
+ container.State.SetGhost(true)
+ }
+ return container, nil
+}
+
+// Register makes a container object usable by the runtime as <container.ID>
+func (runtime *Runtime) Register(container *Container) error {
+ if container.runtime != nil || runtime.Exists(container.ID) {
+ return fmt.Errorf("Container is already loaded")
+ }
+ if err := validateID(container.ID); err != nil {
+ return err
+ }
+ if err := runtime.ensureName(container); err != nil {
+ return err
+ }
+
+ container.runtime = runtime
+
+ // 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
+ runtime.containers.PushBack(container)
+ runtime.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() {
+ if container.State.IsGhost() {
+ utils.Debugf("killing ghost %s", container.ID)
+
+ existingPid := container.State.Pid
+ container.State.SetGhost(false)
+ container.State.SetStopped(0)
+
+ // We only have to handle this for lxc because the other drivers will ensure that
+ // no ghost 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)
+ }
+ runtime.execDriver.Terminate(cmd)
+ }
+ if err := container.Unmount(); err != nil {
+ utils.Debugf("ghost unmount error %s", err)
+ }
+ if err := container.ToDisk(); err != nil {
+ utils.Debugf("saving ghost state to disk %s", err)
+ }
+ }
+
+ info := runtime.execDriver.Info(container.ID)
+ if !info.IsRunning() {
+ utils.Debugf("Container %s was supposed to be running but is not.", container.ID)
+ if runtime.config.AutoRestart {
+ utils.Debugf("Restarting")
+ if err := container.Unmount(); err != nil {
+ utils.Debugf("restart unmount error %s", err)
+ }
+
+ container.State.SetGhost(false)
+ container.State.SetStopped(0)
+ if err := container.Start(); err != nil {
+ return err
+ }
+ } else {
+ utils.Debugf("Marking as stopped")
+ container.State.SetStopped(-127)
+ if err := container.ToDisk(); err != nil {
+ return err
+ }
+ }
+ }
+ } else {
+ // When the container is not running, we still initialize the waitLock
+ // chan and close it. Receiving on nil chan blocks whereas receiving on a
+ // closed chan does not. In this case we do not want to block.
+ container.waitLock = make(chan struct{})
+ close(container.waitLock)
+ }
+ return nil
+}
+
+func (runtime *Runtime) ensureName(container *Container) error {
+ if container.Name == "" {
+ name, err := generateRandomName(runtime)
+ if err != nil {
+ name = utils.TruncateID(container.ID)
+ }
+ container.Name = name
+
+ if err := container.ToDisk(); err != nil {
+ utils.Debugf("Error saving container name %s", err)
+ }
+ if !runtime.containerGraph.Exists(name) {
+ if _, err := runtime.containerGraph.Set(name, container.ID); err != nil {
+ utils.Debugf("Setting default id - %s", err)
+ }
+ }
+ }
+ return nil
+}
+
+func (runtime *Runtime) 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 runtime and cleanly removes its contents from the filesystem.
+func (runtime *Runtime) Destroy(container *Container) error {
+ if container == nil {
+ return fmt.Errorf("The given container is <nil>")
+ }
+
+ element := runtime.getContainerElement(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
+ }
+
+ if err := runtime.driver.Remove(container.ID); err != nil {
+ return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", runtime.driver, container.ID, err)
+ }
+
+ initID := fmt.Sprintf("%s-init", container.ID)
+ if err := runtime.driver.Remove(initID); err != nil {
+ return fmt.Errorf("Driver %s failed to remove init filesystem %s: %s", runtime.driver, initID, err)
+ }
+
+ if _, err := runtime.containerGraph.Purge(container.ID); err != nil {
+ utils.Debugf("Unable to remove container from link graph: %s", err)
+ }
+
+ // Deregister the container before removing its directory, to avoid race conditions
+ runtime.idIndex.Delete(container.ID)
+ runtime.containers.Remove(element)
+ if err := os.RemoveAll(container.root); err != nil {
+ return fmt.Errorf("Unable to remove filesystem for %v: %v", container.ID, err)
+ }
+ return nil
+}
+
+func (runtime *Runtime) restore() error {
+ if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
+ fmt.Printf("Loading containers: ")
+ }
+ dir, err := ioutil.ReadDir(runtime.repository)
+ if err != nil {
+ return err
+ }
+ containers := make(map[string]*Container)
+ currentDriver := runtime.driver.String()
+
+ for _, v := range dir {
+ id := v.Name()
+ container, err := runtime.load(id)
+ if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
+ 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)
+ }
+ }
+
+ register := func(container *Container) {
+ if err := runtime.Register(container); err != nil {
+ utils.Debugf("Failed to register container %s: %s", container.ID, err)
+ }
+ }
+
+ if entities := runtime.containerGraph.List("/", -1); entities != nil {
+ for _, p := range entities.Paths() {
+ if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
+ fmt.Print(".")
+ }
+ e := entities[p]
+ if container, ok := containers[e.ID()]; ok {
+ register(container)
+ 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 = generateRandomName(runtime)
+ if err != nil {
+ container.Name = utils.TruncateID(container.ID)
+ }
+
+ if _, err := runtime.containerGraph.Set(container.Name, container.ID); err != nil {
+ utils.Debugf("Setting default id - %s", err)
+ }
+ register(container)
+ }
+
+ if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
+ fmt.Printf(": done.\n")
+ }
+
+ return nil
+}
+
+// Create creates a new container from the given configuration with a given name.
+func (runtime *Runtime) Create(config *runconfig.Config, name string) (*Container, []string, error) {
+ var (
+ container *Container
+ warnings []string
+ )
+
+ img, err := runtime.repositories.LookupImage(config.Image)
+ if err != nil {
+ return nil, nil, err
+ }
+ if err := runtime.checkImageDepth(img); err != nil {
+ return nil, nil, err
+ }
+ if warnings, err = runtime.mergeAndVerifyConfig(config, img); err != nil {
+ return nil, nil, err
+ }
+ if container, err = runtime.newContainer(name, config, img); err != nil {
+ return nil, nil, err
+ }
+ if err := runtime.createRootfs(container, img); err != nil {
+ return nil, nil, err
+ }
+ if err := container.ToDisk(); err != nil {
+ return nil, nil, err
+ }
+ if err := runtime.Register(container); err != nil {
+ return nil, nil, err
+ }
+ return container, warnings, nil
+}
+
+func (runtime *Runtime) 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 (runtime *Runtime) 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 (runtime *Runtime) mergeAndVerifyConfig(config *runconfig.Config, img *image.Image) ([]string, error) {
+ warnings := []string{}
+ if runtime.checkDeprecatedExpose(img.Config) || runtime.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 (runtime *Runtime) generateIdAndName(name string) (string, string, error) {
+ var (
+ err error
+ id = utils.GenerateRandomID()
+ )
+
+ if name == "" {
+ name, err = generateRandomName(runtime)
+ if err != nil {
+ name = utils.TruncateID(id)
+ }
+ } else {
+ if !validContainerNamePattern.MatchString(name) {
+ return "", "", fmt.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)
+ }
+ }
+ if name[0] != '/' {
+ name = "/" + name
+ }
+ // Set the enitity in the graph using the default name specified
+ if _, err := runtime.containerGraph.Set(name, id); err != nil {
+ if !graphdb.IsNonUniqueNameError(err) {
+ return "", "", err
+ }
+
+ conflictingContainer, err := runtime.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 := runtime.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 id, name, nil
+}
+
+func (runtime *Runtime) 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 (runtime *Runtime) 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 (runtime *Runtime) newContainer(name string, config *runconfig.Config, img *image.Image) (*Container, error) {
+ var (
+ id string
+ err error
+ )
+ id, name, err = runtime.generateIdAndName(name)
+ if err != nil {
+ return nil, err
+ }
+
+ runtime.generateHostname(id, config)
+ entrypoint, args := runtime.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: runtime.driver.String(),
+ ExecDriver: runtime.execDriver.Name(),
+ }
+ container.root = runtime.containerRoot(container.ID)
+ return container, nil
+}
+
+func (runtime *Runtime) 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 := runtime.driver.Create(initID, img.ID, ""); err != nil {
+ return err
+ }
+ initPath, err := runtime.driver.Get(initID)
+ if err != nil {
+ return err
+ }
+ defer runtime.driver.Put(initID)
+
+ if err := graph.SetupInitLayer(initPath); err != nil {
+ return err
+ }
+
+ if err := runtime.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 (runtime *Runtime) Commit(container *Container, repository, tag, comment, author string, config *runconfig.Config) (*image.Image, error) {
+ // FIXME: freeze the container before copying it to avoid data corruption?
+ 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 := runtime.graph.Create(rwTar, containerID, containerImage, comment, author, containerConfig, config)
+ if err != nil {
+ return nil, err
+ }
+ // Register the image if needed
+ if repository != "" {
+ if err := runtime.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 (runtime *Runtime) GetByName(name string) (*Container, error) {
+ fullName, err := GetFullContainerName(name)
+ if err != nil {
+ return nil, err
+ }
+ entity := runtime.containerGraph.Get(fullName)
+ if entity == nil {
+ return nil, fmt.Errorf("Could not find entity for %s", name)
+ }
+ e := runtime.getContainerElement(entity.ID())
+ if e == nil {
+ return nil, fmt.Errorf("Could not find container for entity id %s", entity.ID())
+ }
+ return e.Value.(*Container), nil
+}
+
+func (runtime *Runtime) Children(name string) (map[string]*Container, error) {
+ name, err := GetFullContainerName(name)
+ if err != nil {
+ return nil, err
+ }
+ children := make(map[string]*Container)
+
+ err = runtime.containerGraph.Walk(name, func(p string, e *graphdb.Entity) error {
+ c := runtime.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 (runtime *Runtime) RegisterLink(parent, child *Container, alias string) error {
+ fullName := path.Join(parent.Name, alias)
+ if !runtime.containerGraph.Exists(fullName) {
+ _, err := runtime.containerGraph.Set(fullName, child.ID)
+ return err
+ }
+ return nil
+}
+
+// FIXME: harmonize with NewGraph()
+func NewRuntime(config *daemonconfig.Config, eng *engine.Engine) (*Runtime, error) {
+ runtime, err := NewRuntimeFromDirectory(config, eng)
+ if err != nil {
+ return nil, err
+ }
+ return runtime, nil
+}
+
+func NewRuntimeFromDirectory(config *daemonconfig.Config, eng *engine.Engine) (*Runtime, error) {
+ if !config.EnableSelinuxSupport {
+ selinux.SetDisabled()
+ }
+
+ // Set the default driver
+ graphdriver.DefaultDriver = config.GraphDriver
+
+ // Load storage driver
+ driver, err := graphdriver.New(config.Root)
+ if err != nil {
+ return nil, err
+ }
+ utils.Debugf("Using graph driver %s", driver)
+
+ if err := remountPrivate(config.Root); err != nil {
+ return nil, err
+ }
+
+ runtimeRepo := path.Join(config.Root, "containers")
+
+ if err := os.MkdirAll(runtimeRepo, 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)
+ 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.io/en/latest/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
+ }
+
+ runtime := &Runtime{
+ repository: runtimeRepo,
+ containers: list.New(),
+ graph: g,
+ repositories: repositories,
+ idIndex: utils.NewTruncIndex(),
+ sysInfo: sysInfo,
+ volumes: volumes,
+ config: config,
+ containerGraph: graph,
+ driver: driver,
+ sysInitPath: sysInitPath,
+ execDriver: ed,
+ eng: eng,
+ }
+
+ if err := runtime.checkLocaldns(); err != nil {
+ return nil, err
+ }
+ if err := runtime.restore(); err != nil {
+ return nil, err
+ }
+ return runtime, nil
+}
+
+func (runtime *Runtime) shutdown() error {
+ group := sync.WaitGroup{}
+ utils.Debugf("starting clean shutdown of all containers...")
+ for _, container := range runtime.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.Wait()
+ utils.Debugf("container stopped %s", c.ID)
+ }()
+ }
+ }
+ group.Wait()
+
+ return nil
+}
+
+func (runtime *Runtime) Close() error {
+ errorsStrings := []string{}
+ if err := runtime.shutdown(); err != nil {
+ utils.Errorf("runtime.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 := runtime.driver.Cleanup(); err != nil {
+ utils.Errorf("runtime.driver.Cleanup(): %s", err.Error())
+ errorsStrings = append(errorsStrings, err.Error())
+ }
+ if err := runtime.containerGraph.Close(); err != nil {
+ utils.Errorf("runtime.containerGraph.Close(): %s", err.Error())
+ errorsStrings = append(errorsStrings, err.Error())
+ }
+ if len(errorsStrings) > 0 {
+ return fmt.Errorf("%s", strings.Join(errorsStrings, ", "))
+ }
+ return nil
+}
+
+func (runtime *Runtime) Mount(container *Container) error {
+ dir, err := runtime.driver.Get(container.ID)
+ if err != nil {
+ return fmt.Errorf("Error getting container %s from driver %s: %s", container.ID, runtime.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')",
+ runtime.driver, container.ID, container.basefs, dir)
+ }
+ return nil
+}
+
+func (runtime *Runtime) Unmount(container *Container) error {
+ runtime.driver.Put(container.ID)
+ return nil
+}
+
+func (runtime *Runtime) Changes(container *Container) ([]archive.Change, error) {
+ if differ, ok := runtime.driver.(graphdriver.Differ); ok {
+ return differ.Changes(container.ID)
+ }
+ cDir, err := runtime.driver.Get(container.ID)
+ if err != nil {
+ return nil, fmt.Errorf("Error getting container rootfs %s from driver %s: %s", container.ID, container.runtime.driver, err)
+ }
+ defer runtime.driver.Put(container.ID)
+ initDir, err := runtime.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.runtime.driver, err)
+ }
+ defer runtime.driver.Put(container.ID + "-init")
+ return archive.ChangesDirs(cDir, initDir)
+}
+
+func (runtime *Runtime) Diff(container *Container) (archive.Archive, error) {
+ if differ, ok := runtime.driver.(graphdriver.Differ); ok {
+ return differ.Diff(container.ID)
+ }
+
+ changes, err := runtime.Changes(container)
+ if err != nil {
+ return nil, err
+ }
+
+ cDir, err := runtime.driver.Get(container.ID)
+ if err != nil {
+ return nil, fmt.Errorf("Error getting container rootfs %s from driver %s: %s", container.ID, container.runtime.driver, err)
+ }
+
+ archive, err := archive.ExportChanges(cDir, changes)
+ if err != nil {
+ return nil, err
+ }
+ return utils.NewReadCloserWrapper(archive, func() error {
+ err := archive.Close()
+ runtime.driver.Put(container.ID)
+ return err
+ }), nil
+}
+
+func (runtime *Runtime) Run(c *Container, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {
+ return runtime.execDriver.Run(c.command, pipes, startCallback)
+}
+
+func (runtime *Runtime) Kill(c *Container, sig int) error {
+ return runtime.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 runtime!
+func (runtime *Runtime) Nuke() error {
+ var wg sync.WaitGroup
+ for _, container := range runtime.List() {
+ wg.Add(1)
+ go func(c *Container) {
+ c.Kill()
+ wg.Done()
+ }(container)
+ }
+ wg.Wait()
+ runtime.Close()
+
+ return os.RemoveAll(runtime.config.Root)
+}
+
+// FIXME: this is a convenience function for integration tests
+// which need direct access to runtime.graph.
+// Once the tests switch to using engine and jobs, this method
+// can go away.
+func (runtime *Runtime) Graph() *graph.Graph {
+ return runtime.graph
+}
+
+func (runtime *Runtime) Repositories() *graph.TagStore {
+ return runtime.repositories
+}
+
+func (runtime *Runtime) Config() *daemonconfig.Config {
+ return runtime.config
+}
+
+func (runtime *Runtime) SystemConfig() *sysinfo.SysInfo {
+ return runtime.sysInfo
+}
+
+func (runtime *Runtime) SystemInitPath() string {
+ return runtime.sysInitPath
+}
+
+func (runtime *Runtime) GraphDriver() graphdriver.Driver {
+ return runtime.driver
+}
+
+func (runtime *Runtime) ExecutionDriver() execdriver.Driver {
+ return runtime.execDriver
+}
+
+func (runtime *Runtime) Volumes() *graph.Graph {
+ return runtime.volumes
+}
+
+func (runtime *Runtime) ContainerGraph() *graphdb.Database {
+ return runtime.containerGraph
+}
+
+func (runtime *Runtime) SetServer(server Server) {
+ runtime.srv = server
+}
+
+func (runtime *Runtime) checkLocaldns() error {
+ resolvConf, err := utils.GetResolvConf()
+ if err != nil {
+ return err
+ }
+ if len(runtime.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)
+ runtime.config.Dns = DefaultDns
+ }
+ return nil
+}
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