994 lines
28 KiB
Go
994 lines
28 KiB
Go
package daemon
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import (
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"container/list"
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"fmt"
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"github.com/dotcloud/docker/archive"
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"github.com/dotcloud/docker/daemon/execdriver"
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"github.com/dotcloud/docker/daemon/execdriver/execdrivers"
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"github.com/dotcloud/docker/daemon/execdriver/lxc"
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"github.com/dotcloud/docker/daemon/graphdriver"
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_ "github.com/dotcloud/docker/daemon/graphdriver/vfs"
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_ "github.com/dotcloud/docker/daemon/networkdriver/bridge"
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"github.com/dotcloud/docker/daemon/networkdriver/portallocator"
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"github.com/dotcloud/docker/daemonconfig"
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"github.com/dotcloud/docker/dockerversion"
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"github.com/dotcloud/docker/engine"
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"github.com/dotcloud/docker/graph"
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"github.com/dotcloud/docker/image"
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"github.com/dotcloud/docker/pkg/graphdb"
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"github.com/dotcloud/docker/pkg/mount"
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"github.com/dotcloud/docker/pkg/selinux"
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"github.com/dotcloud/docker/pkg/sysinfo"
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"github.com/dotcloud/docker/runconfig"
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"github.com/dotcloud/docker/utils"
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"io"
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"io/ioutil"
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"log"
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"os"
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"path"
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"regexp"
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"strings"
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"sync"
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"time"
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)
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// Set the max depth to the aufs default that most
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// kernels are compiled with
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// For more information see: http://sourceforge.net/p/aufs/aufs3-standalone/ci/aufs3.12/tree/config.mk
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const MaxImageDepth = 127
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var (
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DefaultDns = []string{"8.8.8.8", "8.8.4.4"}
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validContainerNameChars = `[a-zA-Z0-9_.-]`
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validContainerNamePattern = regexp.MustCompile(`^/?` + validContainerNameChars + `+$`)
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)
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type Daemon struct {
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repository string
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sysInitPath string
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containers *list.List
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graph *graph.Graph
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repositories *graph.TagStore
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idIndex *utils.TruncIndex
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sysInfo *sysinfo.SysInfo
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volumes *graph.Graph
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srv Server
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eng *engine.Engine
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config *daemonconfig.Config
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containerGraph *graphdb.Database
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driver graphdriver.Driver
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execDriver execdriver.Driver
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}
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// Mountpoints should be private to the container
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func remountPrivate(mountPoint string) error {
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mounted, err := mount.Mounted(mountPoint)
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if err != nil {
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return err
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}
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if !mounted {
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if err := mount.Mount(mountPoint, mountPoint, "none", "bind,rw"); err != nil {
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return err
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}
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}
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return mount.ForceMount("", mountPoint, "none", "private")
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}
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// List returns an array of all containers registered in the daemon.
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func (daemon *Daemon) List() []*Container {
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containers := new(History)
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for e := daemon.containers.Front(); e != nil; e = e.Next() {
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containers.Add(e.Value.(*Container))
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}
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return *containers
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}
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func (daemon *Daemon) getContainerElement(id string) *list.Element {
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for e := daemon.containers.Front(); e != nil; e = e.Next() {
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container := e.Value.(*Container)
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if container.ID == id {
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return e
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}
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}
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return nil
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}
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// Get looks for a container by the specified ID or name, and returns it.
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// If the container is not found, or if an error occurs, nil is returned.
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func (daemon *Daemon) Get(name string) *Container {
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if c, _ := daemon.GetByName(name); c != nil {
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return c
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}
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id, err := daemon.idIndex.Get(name)
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if err != nil {
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return nil
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}
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e := daemon.getContainerElement(id)
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if e == nil {
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return nil
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}
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return e.Value.(*Container)
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}
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// Exists returns a true if a container of the specified ID or name exists,
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// false otherwise.
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func (daemon *Daemon) Exists(id string) bool {
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return daemon.Get(id) != nil
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}
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func (daemon *Daemon) containerRoot(id string) string {
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return path.Join(daemon.repository, id)
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}
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// Load reads the contents of a container from disk
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// This is typically done at startup.
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func (daemon *Daemon) load(id string) (*Container, error) {
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container := &Container{root: daemon.containerRoot(id)}
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if err := container.FromDisk(); err != nil {
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return nil, err
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}
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if container.ID != id {
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return container, fmt.Errorf("Container %s is stored at %s", container.ID, id)
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}
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if container.State.IsRunning() {
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container.State.SetGhost(true)
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}
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return container, nil
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}
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// Register makes a container object usable by the daemon as <container.ID>
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func (daemon *Daemon) Register(container *Container) error {
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if container.daemon != nil || daemon.Exists(container.ID) {
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return fmt.Errorf("Container is already loaded")
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}
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if err := validateID(container.ID); err != nil {
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return err
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}
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if err := daemon.ensureName(container); err != nil {
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return err
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}
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container.daemon = daemon
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// Attach to stdout and stderr
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container.stderr = utils.NewWriteBroadcaster()
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container.stdout = utils.NewWriteBroadcaster()
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// Attach to stdin
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if container.Config.OpenStdin {
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container.stdin, container.stdinPipe = io.Pipe()
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} else {
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container.stdinPipe = utils.NopWriteCloser(ioutil.Discard) // Silently drop stdin
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}
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// done
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daemon.containers.PushBack(container)
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daemon.idIndex.Add(container.ID)
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// FIXME: if the container is supposed to be running but is not, auto restart it?
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// if so, then we need to restart monitor and init a new lock
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// If the container is supposed to be running, make sure of it
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if container.State.IsRunning() {
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if container.State.IsGhost() {
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utils.Debugf("killing ghost %s", container.ID)
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existingPid := container.State.Pid
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container.State.SetGhost(false)
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container.State.SetStopped(0)
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// We only have to handle this for lxc because the other drivers will ensure that
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// no ghost processes are left when docker dies
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if container.ExecDriver == "" || strings.Contains(container.ExecDriver, "lxc") {
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lxc.KillLxc(container.ID, 9)
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} else {
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// use the current driver and ensure that the container is dead x.x
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cmd := &execdriver.Command{
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ID: container.ID,
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}
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var err error
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cmd.Process, err = os.FindProcess(existingPid)
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if err != nil {
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utils.Debugf("cannot find existing process for %d", existingPid)
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}
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daemon.execDriver.Terminate(cmd)
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}
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if err := container.Unmount(); err != nil {
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utils.Debugf("ghost unmount error %s", err)
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}
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if err := container.ToDisk(); err != nil {
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utils.Debugf("saving ghost state to disk %s", err)
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}
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}
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info := daemon.execDriver.Info(container.ID)
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if !info.IsRunning() {
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utils.Debugf("Container %s was supposed to be running but is not.", container.ID)
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if daemon.config.AutoRestart {
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utils.Debugf("Restarting")
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if err := container.Unmount(); err != nil {
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utils.Debugf("restart unmount error %s", err)
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}
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container.State.SetGhost(false)
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container.State.SetStopped(0)
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if err := container.Start(); err != nil {
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return err
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}
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} else {
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utils.Debugf("Marking as stopped")
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container.State.SetStopped(-127)
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if err := container.ToDisk(); err != nil {
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return err
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}
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}
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}
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} else {
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// When the container is not running, we still initialize the waitLock
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// chan and close it. Receiving on nil chan blocks whereas receiving on a
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// closed chan does not. In this case we do not want to block.
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container.waitLock = make(chan struct{})
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close(container.waitLock)
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}
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return nil
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}
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func (daemon *Daemon) ensureName(container *Container) error {
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if container.Name == "" {
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name, err := generateRandomName(daemon)
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if err != nil {
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name = utils.TruncateID(container.ID)
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}
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container.Name = name
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if err := container.ToDisk(); err != nil {
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utils.Debugf("Error saving container name %s", err)
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}
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if !daemon.containerGraph.Exists(name) {
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if _, err := daemon.containerGraph.Set(name, container.ID); err != nil {
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utils.Debugf("Setting default id - %s", err)
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}
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}
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}
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return nil
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}
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func (daemon *Daemon) LogToDisk(src *utils.WriteBroadcaster, dst, stream string) error {
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log, err := os.OpenFile(dst, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600)
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if err != nil {
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return err
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}
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src.AddWriter(log, stream)
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return nil
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}
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// Destroy unregisters a container from the daemon and cleanly removes its contents from the filesystem.
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func (daemon *Daemon) Destroy(container *Container) error {
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if container == nil {
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return fmt.Errorf("The given container is <nil>")
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}
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element := daemon.getContainerElement(container.ID)
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if element == nil {
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return fmt.Errorf("Container %v not found - maybe it was already destroyed?", container.ID)
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}
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if err := container.Stop(3); err != nil {
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return err
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}
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if err := daemon.driver.Remove(container.ID); err != nil {
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return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", daemon.driver, container.ID, err)
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}
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initID := fmt.Sprintf("%s-init", container.ID)
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if err := daemon.driver.Remove(initID); err != nil {
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return fmt.Errorf("Driver %s failed to remove init filesystem %s: %s", daemon.driver, initID, err)
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}
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if _, err := daemon.containerGraph.Purge(container.ID); err != nil {
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utils.Debugf("Unable to remove container from link graph: %s", err)
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}
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// Deregister the container before removing its directory, to avoid race conditions
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daemon.idIndex.Delete(container.ID)
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daemon.containers.Remove(element)
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if err := os.RemoveAll(container.root); err != nil {
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return fmt.Errorf("Unable to remove filesystem for %v: %v", container.ID, err)
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}
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return nil
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}
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func (daemon *Daemon) restore() error {
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if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
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fmt.Printf("Loading containers: ")
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}
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dir, err := ioutil.ReadDir(daemon.repository)
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if err != nil {
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return err
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}
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containers := make(map[string]*Container)
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currentDriver := daemon.driver.String()
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for _, v := range dir {
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id := v.Name()
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container, err := daemon.load(id)
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if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
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fmt.Print(".")
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}
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if err != nil {
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utils.Errorf("Failed to load container %v: %v", id, err)
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continue
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}
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// Ignore the container if it does not support the current driver being used by the graph
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if container.Driver == "" && currentDriver == "aufs" || container.Driver == currentDriver {
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utils.Debugf("Loaded container %v", container.ID)
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containers[container.ID] = container
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} else {
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utils.Debugf("Cannot load container %s because it was created with another graph driver.", container.ID)
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}
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}
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register := func(container *Container) {
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if err := daemon.Register(container); err != nil {
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utils.Debugf("Failed to register container %s: %s", container.ID, err)
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}
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}
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if entities := daemon.containerGraph.List("/", -1); entities != nil {
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for _, p := range entities.Paths() {
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if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
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fmt.Print(".")
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}
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e := entities[p]
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if container, ok := containers[e.ID()]; ok {
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register(container)
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delete(containers, e.ID())
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}
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}
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}
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// Any containers that are left over do not exist in the graph
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for _, container := range containers {
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// Try to set the default name for a container if it exists prior to links
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container.Name, err = generateRandomName(daemon)
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if err != nil {
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container.Name = utils.TruncateID(container.ID)
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}
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if _, err := daemon.containerGraph.Set(container.Name, container.ID); err != nil {
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utils.Debugf("Setting default id - %s", err)
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}
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register(container)
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}
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if os.Getenv("DEBUG") == "" && os.Getenv("TEST") == "" {
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fmt.Printf(": done.\n")
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}
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return nil
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}
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// Create creates a new container from the given configuration with a given name.
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func (daemon *Daemon) Create(config *runconfig.Config, name string) (*Container, []string, error) {
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var (
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container *Container
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warnings []string
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)
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img, err := daemon.repositories.LookupImage(config.Image)
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if err != nil {
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return nil, nil, err
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}
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if err := daemon.checkImageDepth(img); err != nil {
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return nil, nil, err
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}
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if warnings, err = daemon.mergeAndVerifyConfig(config, img); err != nil {
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return nil, nil, err
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}
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if container, err = daemon.newContainer(name, config, img); err != nil {
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return nil, nil, err
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}
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if err := daemon.createRootfs(container, img); err != nil {
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return nil, nil, err
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}
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if err := container.ToDisk(); err != nil {
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return nil, nil, err
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}
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if err := daemon.Register(container); err != nil {
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return nil, nil, err
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}
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return container, warnings, nil
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}
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func (daemon *Daemon) checkImageDepth(img *image.Image) error {
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// We add 2 layers to the depth because the container's rw and
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// init layer add to the restriction
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depth, err := img.Depth()
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if err != nil {
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return err
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}
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if depth+2 >= MaxImageDepth {
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return fmt.Errorf("Cannot create container with more than %d parents", MaxImageDepth)
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}
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return nil
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}
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func (daemon *Daemon) checkDeprecatedExpose(config *runconfig.Config) bool {
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if config != nil {
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if config.PortSpecs != nil {
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for _, p := range config.PortSpecs {
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if strings.Contains(p, ":") {
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return true
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}
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}
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}
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}
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return false
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}
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func (daemon *Daemon) mergeAndVerifyConfig(config *runconfig.Config, img *image.Image) ([]string, error) {
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warnings := []string{}
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if daemon.checkDeprecatedExpose(img.Config) || daemon.checkDeprecatedExpose(config) {
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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.")
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}
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if img.Config != nil {
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if err := runconfig.Merge(config, img.Config); err != nil {
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return nil, err
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}
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}
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if len(config.Entrypoint) == 0 && len(config.Cmd) == 0 {
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return nil, fmt.Errorf("No command specified")
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}
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return warnings, nil
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}
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func (daemon *Daemon) generateIdAndName(name string) (string, string, error) {
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var (
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err error
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id = utils.GenerateRandomID()
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)
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if name == "" {
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name, err = generateRandomName(daemon)
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if err != nil {
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name = utils.TruncateID(id)
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}
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} else {
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if !validContainerNamePattern.MatchString(name) {
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return "", "", fmt.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)
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}
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}
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if name[0] != '/' {
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name = "/" + name
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}
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// Set the enitity in the graph using the default name specified
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if _, err := daemon.containerGraph.Set(name, id); err != nil {
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if !graphdb.IsNonUniqueNameError(err) {
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return "", "", err
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}
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conflictingContainer, err := daemon.GetByName(name)
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if err != nil {
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if strings.Contains(err.Error(), "Could not find entity") {
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return "", "", err
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}
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// Remove name and continue starting the container
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if err := daemon.containerGraph.Delete(name); err != nil {
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return "", "", err
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}
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} else {
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nameAsKnownByUser := strings.TrimPrefix(name, "/")
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return "", "", fmt.Errorf(
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"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,
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utils.TruncateID(conflictingContainer.ID), nameAsKnownByUser)
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}
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}
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return id, name, nil
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}
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func (daemon *Daemon) generateHostname(id string, config *runconfig.Config) {
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// Generate default hostname
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// FIXME: the lxc template no longer needs to set a default hostname
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if config.Hostname == "" {
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config.Hostname = id[:12]
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}
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}
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func (daemon *Daemon) getEntrypointAndArgs(config *runconfig.Config) (string, []string) {
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var (
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entrypoint string
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args []string
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)
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if len(config.Entrypoint) != 0 {
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entrypoint = config.Entrypoint[0]
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args = append(config.Entrypoint[1:], config.Cmd...)
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} else {
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entrypoint = config.Cmd[0]
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args = config.Cmd[1:]
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}
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return entrypoint, args
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}
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func (daemon *Daemon) newContainer(name string, config *runconfig.Config, img *image.Image) (*Container, error) {
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var (
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id string
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err error
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)
|
|
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(),
|
|
}
|
|
container.root = daemon.containerRoot(container.ID)
|
|
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, 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 := 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.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 (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
|
|
}
|
|
|
|
// 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()
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
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)
|
|
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
|
|
}
|
|
|
|
daemon := &Daemon{
|
|
repository: daemonRepo,
|
|
containers: list.New(),
|
|
graph: g,
|
|
repositories: repositories,
|
|
idIndex: utils.NewTruncIndex([]string{}),
|
|
sysInfo: sysInfo,
|
|
volumes: volumes,
|
|
config: config,
|
|
containerGraph: graph,
|
|
driver: driver,
|
|
sysInitPath: sysInitPath,
|
|
execDriver: ed,
|
|
eng: eng,
|
|
}
|
|
|
|
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.Wait()
|
|
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)
|
|
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) 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 := utils.GetResolvConf()
|
|
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
|
|
}
|