mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
0376a69cb1
Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
872 lines
25 KiB
Go
872 lines
25 KiB
Go
package docker
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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/execdriver"
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"github.com/dotcloud/docker/execdriver/chroot"
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"github.com/dotcloud/docker/execdriver/lxc"
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"github.com/dotcloud/docker/graphdriver"
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"github.com/dotcloud/docker/graphdriver/aufs"
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_ "github.com/dotcloud/docker/graphdriver/devmapper"
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_ "github.com/dotcloud/docker/graphdriver/vfs"
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"github.com/dotcloud/docker/pkg/graphdb"
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"github.com/dotcloud/docker/pkg/sysinfo"
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"github.com/dotcloud/docker/utils"
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"io"
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"io/ioutil"
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"os"
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"path"
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"regexp"
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"sort"
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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 Runtime struct {
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repository string
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sysInitPath string
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containers *list.List
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networkManager *NetworkManager
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graph *Graph
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repositories *TagStore
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idIndex *utils.TruncIndex
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sysInfo *sysinfo.SysInfo
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volumes *Graph
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srv *Server
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config *DaemonConfig
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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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// List returns an array of all containers registered in the runtime.
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func (runtime *Runtime) List() []*Container {
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containers := new(History)
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for e := runtime.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 (runtime *Runtime) getContainerElement(id string) *list.Element {
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for e := runtime.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 (runtime *Runtime) Get(name string) *Container {
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if c, _ := runtime.GetByName(name); c != nil {
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return c
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}
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id, err := runtime.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 := runtime.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 (runtime *Runtime) Exists(id string) bool {
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return runtime.Get(id) != nil
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}
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func (runtime *Runtime) containerRoot(id string) string {
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return path.Join(runtime.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 (runtime *Runtime) load(id string) (*Container, error) {
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container := &Container{root: runtime.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 runtime as <container.ID>
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func (runtime *Runtime) Register(container *Container) error {
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if container.runtime != nil || runtime.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 := runtime.ensureName(container); err != nil {
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return err
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}
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// Get the root filesystem from the driver
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rootfs, err := runtime.driver.Get(container.ID)
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if err != nil {
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return fmt.Errorf("Error getting container filesystem %s from driver %s: %s", container.ID, runtime.driver, err)
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}
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container.rootfs = rootfs
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container.runtime = runtime
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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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runtime.containers.PushBack(container)
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runtime.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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info := runtime.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 runtime.config.AutoRestart {
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utils.Debugf("Restarting")
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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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} else {
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utils.Debugf("Reconnecting to container %v", container.ID)
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if err := container.allocateNetwork(); err != nil {
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return err
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}
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container.waitLock = make(chan struct{})
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go container.monitor(nil)
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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 (runtime *Runtime) ensureName(container *Container) error {
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if container.Name == "" {
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name, err := generateRandomName(runtime)
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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 !runtime.containerGraph.Exists(name) {
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if _, err := runtime.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 (runtime *Runtime) 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 runtime and cleanly removes its contents from the filesystem.
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func (runtime *Runtime) 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 := runtime.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 := runtime.driver.Remove(container.ID); err != nil {
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return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", runtime.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 := runtime.driver.Remove(initID); err != nil {
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return fmt.Errorf("Driver %s failed to remove init filesystem %s: %s", runtime.driver, initID, err)
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}
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if _, err := runtime.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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runtime.idIndex.Delete(container.ID)
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runtime.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 (runtime *Runtime) 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(runtime.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 := runtime.driver.String()
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for _, v := range dir {
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id := v.Name()
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container, err := runtime.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 := runtime.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 := runtime.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(runtime)
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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 := runtime.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 (runtime *Runtime) Create(config *Config, name string) (*Container, []string, error) {
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// Lookup image
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img, err := runtime.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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// 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 nil, nil, err
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}
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if depth+2 >= MaxImageDepth {
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return nil, nil, fmt.Errorf("Cannot create container with more than %d parents", MaxImageDepth)
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}
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checkDeprecatedExpose := func(config *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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warnings := []string{}
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if checkDeprecatedExpose(img.Config) || checkDeprecatedExpose(config) {
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warnings = append(warnings, "The mapping to public ports on your host 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 := MergeConfig(config, img.Config); err != nil {
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return nil, nil, err
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}
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}
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if len(config.Entrypoint) != 0 && config.Cmd == nil {
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config.Cmd = []string{}
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} else if config.Cmd == nil || len(config.Cmd) == 0 {
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return nil, nil, fmt.Errorf("No command specified")
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}
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// Generate id
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id := GenerateID()
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if name == "" {
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name, err = generateRandomName(runtime)
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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 nil, nil, 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 := runtime.containerGraph.Set(name, id); err != nil {
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if !strings.HasSuffix(err.Error(), "name are not unique") {
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return nil, nil, err
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}
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conflictingContainer, err := runtime.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 nil, nil, err
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}
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// Remove name and continue starting the container
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if err := runtime.containerGraph.Delete(name); err != nil {
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return nil, nil, err
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}
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} else {
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nameAsKnownByUser := strings.TrimPrefix(name, "/")
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return nil, nil, 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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// 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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var args []string
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var entrypoint string
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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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container := &Container{
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// FIXME: we should generate the ID here instead of receiving it as an argument
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ID: id,
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Created: time.Now().UTC(),
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Path: entrypoint,
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Args: args, //FIXME: de-duplicate from config
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Config: config,
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hostConfig: &HostConfig{},
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Image: img.ID, // Always use the resolved image id
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NetworkSettings: &NetworkSettings{},
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Name: name,
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Driver: runtime.driver.String(),
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}
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container.root = runtime.containerRoot(container.ID)
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// Step 1: create the container directory.
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// This doubles as a barrier to avoid race conditions.
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if err := os.Mkdir(container.root, 0700); err != nil {
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return nil, nil, err
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}
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initID := fmt.Sprintf("%s-init", container.ID)
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if err := runtime.driver.Create(initID, img.ID); err != nil {
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return nil, nil, err
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}
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initPath, err := runtime.driver.Get(initID)
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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 := setupInitLayer(initPath); err != nil {
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return nil, nil, err
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}
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if err := runtime.driver.Create(container.ID, initID); err != nil {
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return nil, nil, err
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}
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resolvConf, err := utils.GetResolvConf()
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if err != nil {
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return nil, nil, err
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}
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if len(config.Dns) == 0 && len(runtime.config.Dns) == 0 && utils.CheckLocalDns(resolvConf) {
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//"WARNING: Docker detected local DNS server on resolv.conf. Using default external servers: %v", defaultDns
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runtime.config.Dns = defaultDns
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}
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// If custom dns exists, then create a resolv.conf for the container
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if len(config.Dns) > 0 || len(runtime.config.Dns) > 0 {
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var dns []string
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if len(config.Dns) > 0 {
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dns = config.Dns
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} else {
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dns = runtime.config.Dns
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}
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container.ResolvConfPath = path.Join(container.root, "resolv.conf")
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f, err := os.Create(container.ResolvConfPath)
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if err != nil {
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return nil, nil, err
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}
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defer f.Close()
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for _, dns := range dns {
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if _, err := f.Write([]byte("nameserver " + dns + "\n")); err != nil {
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return nil, nil, err
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}
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}
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} else {
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container.ResolvConfPath = "/etc/resolv.conf"
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}
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// Step 2: save the container json
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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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// Step 3: register the container
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if err := runtime.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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// Commit creates a new filesystem image from the current state of a container.
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// The image can optionally be tagged into a repository
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func (runtime *Runtime) Commit(container *Container, repository, tag, comment, author string, config *Config) (*Image, error) {
|
|
// FIXME: freeze the container before copying it to avoid data corruption?
|
|
// FIXME: this shouldn't be in commands.
|
|
if err := container.EnsureMounted(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
rwTar, err := container.ExportRw()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// Create a new image from the container's base layers + a new layer from container changes
|
|
img, err := runtime.graph.Create(rwTar, container, comment, author, 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 getFullName(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 := getFullName(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 := getFullName(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) (*Runtime, error) {
|
|
runtime, err := NewRuntimeFromDirectory(config)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return runtime, nil
|
|
}
|
|
|
|
func NewRuntimeFromDirectory(config *DaemonConfig) (*Runtime, error) {
|
|
|
|
// 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)
|
|
|
|
runtimeRepo := path.Join(config.Root, "containers")
|
|
|
|
if err := os.MkdirAll(runtimeRepo, 0700); err != nil && !os.IsExist(err) {
|
|
return nil, err
|
|
}
|
|
|
|
if ad, ok := driver.(*aufs.Driver); ok {
|
|
utils.Debugf("Migrating existing containers")
|
|
if err := ad.Migrate(config.Root, setupInitLayer); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
utils.Debugf("Creating images graph")
|
|
g, err := 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 := NewGraph(path.Join(config.Root, "volumes"), volumesDriver)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
utils.Debugf("Creating repository list")
|
|
repositories, err := 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.BridgeIface == "" {
|
|
config.BridgeIface = DefaultNetworkBridge
|
|
}
|
|
netManager, err := newNetworkManager(config)
|
|
if 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", 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)
|
|
|
|
/*
|
|
temporarilly disabled.
|
|
*/
|
|
if false {
|
|
var ed execdriver.Driver
|
|
if driver := os.Getenv("EXEC_DRIVER"); driver == "lxc" {
|
|
ed, err = lxc.NewDriver(config.Root, sysInfo.AppArmor)
|
|
} else {
|
|
ed, err = chroot.NewDriver()
|
|
}
|
|
if ed != nil {
|
|
}
|
|
}
|
|
ed, err := lxc.NewDriver(config.Root, sysInfo.AppArmor)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
runtime := &Runtime{
|
|
repository: runtimeRepo,
|
|
containers: list.New(),
|
|
networkManager: netManager,
|
|
graph: g,
|
|
repositories: repositories,
|
|
idIndex: utils.NewTruncIndex(),
|
|
sysInfo: sysInfo,
|
|
volumes: volumes,
|
|
config: config,
|
|
containerGraph: graph,
|
|
driver: driver,
|
|
sysInitPath: sysInitPath,
|
|
execDriver: ed,
|
|
}
|
|
|
|
if err := runtime.restore(); err != nil {
|
|
return nil, err
|
|
}
|
|
return runtime, nil
|
|
}
|
|
|
|
func (runtime *Runtime) Close() error {
|
|
errorsStrings := []string{}
|
|
if err := runtime.networkManager.Close(); err != nil {
|
|
utils.Errorf("runtime.networkManager.Close(): %s", err.Error())
|
|
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.rootfs == "" {
|
|
container.rootfs = dir
|
|
} else if container.rootfs != dir {
|
|
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
|
|
runtime.driver, container.ID, container.rootfs, dir)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (runtime *Runtime) Unmount(container *Container) error {
|
|
// FIXME: Unmount is deprecated because drivers are responsible for mounting
|
|
// and unmounting when necessary. Use driver.Remove() instead.
|
|
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)
|
|
}
|
|
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)
|
|
}
|
|
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)
|
|
}
|
|
|
|
return archive.ExportChanges(cDir, changes)
|
|
}
|
|
|
|
func (runtime *Runtime) Run(c *Container, startCallback execdriver.StartCallback) (int, error) {
|
|
return runtime.execDriver.Run(c.process, startCallback)
|
|
}
|
|
|
|
func (runtime *Runtime) Kill(c *Container, sig int) error {
|
|
return runtime.execDriver.Kill(c.process, sig)
|
|
}
|
|
|
|
func (runtime *Runtime) WaitGhost(c *Container) error {
|
|
return runtime.execDriver.Wait(c.ID)
|
|
}
|
|
|
|
// 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 {
|
|
return runtime.graph
|
|
}
|
|
|
|
// History is a convenience type for storing a list of containers,
|
|
// ordered by creation date.
|
|
type History []*Container
|
|
|
|
func (history *History) Len() int {
|
|
return len(*history)
|
|
}
|
|
|
|
func (history *History) Less(i, j int) bool {
|
|
containers := *history
|
|
return containers[j].When().Before(containers[i].When())
|
|
}
|
|
|
|
func (history *History) Swap(i, j int) {
|
|
containers := *history
|
|
tmp := containers[i]
|
|
containers[i] = containers[j]
|
|
containers[j] = tmp
|
|
}
|
|
|
|
func (history *History) Add(container *Container) {
|
|
*history = append(*history, container)
|
|
sort.Sort(history)
|
|
}
|