// CmdLookup return an image encoded in JSON
func (s *TagStore) CmdLookup(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("usage: %s NAME", job.Name)
}
name := job.Args[0]
if image, err := s.LookupImage(name); err == nil && image != nil {
if job.GetenvBool("raw") {
b, err := image.RawJson()
if err != nil {
return job.Error(err)
}
job.Stdout.Write(b)
return engine.StatusOK
}
out := &engine.Env{}
out.Set("Id", image.ID)
out.Set("Parent", image.Parent)
out.Set("Comment", image.Comment)
out.SetAuto("Created", image.Created)
out.Set("Container", image.Container)
out.SetJson("ContainerConfig", image.ContainerConfig)
out.Set("DockerVersion", image.DockerVersion)
out.Set("Author", image.Author)
out.SetJson("Config", image.Config)
out.Set("Architecture", image.Architecture)
out.Set("Os", image.OS)
out.SetInt64("Size", image.Size)
if _, err = out.WriteTo(job.Stdout); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
return job.Errorf("No such image: %s", name)
}
func (s *TagStore) CmdViz(job *engine.Job) engine.Status {
images, _ := s.graph.Map()
if images == nil {
return engine.StatusOK
}
job.Stdout.Write([]byte("digraph docker {\n"))
var (
parentImage *image.Image
err error
)
for _, image := range images {
parentImage, err = image.GetParent()
if err != nil {
return job.Errorf("Error while getting parent image: %v", err)
}
if parentImage != nil {
job.Stdout.Write([]byte(" \"" + parentImage.ID + "\" -> \"" + image.ID + "\"\n"))
} else {
job.Stdout.Write([]byte(" base -> \"" + image.ID + "\" [style=invis]\n"))
}
}
for id, repos := range s.GetRepoRefs() {
job.Stdout.Write([]byte(" \"" + id + "\" [label=\"" + id + "\\n" + strings.Join(repos, "\\n") + "\",shape=box,fillcolor=\"paleturquoise\",style=\"filled,rounded\"];\n"))
}
job.Stdout.Write([]byte(" base [style=invisible]\n}\n"))
return engine.StatusOK
}
// ServeApi loops through all of the protocols sent in to docker and spawns
// off a go routine to setup a serving http.Server for each.
func ServeApi(job *engine.Job) engine.Status {
if len(job.Args) == 0 {
return job.Errorf("usage: %s PROTO://ADDR [PROTO://ADDR ...]", job.Name)
}
var (
protoAddrs = job.Args
chErrors = make(chan error, len(protoAddrs))
)
activationLock = make(chan struct{})
for _, protoAddr := range protoAddrs {
protoAddrParts := strings.SplitN(protoAddr, "://", 2)
if len(protoAddrParts) != 2 {
return job.Errorf("usage: %s PROTO://ADDR [PROTO://ADDR ...]", job.Name)
}
go func() {
log.Infof("Listening for HTTP on %s (%s)", protoAddrParts[0], protoAddrParts[1])
chErrors <- ListenAndServe(protoAddrParts[0], protoAddrParts[1], job)
}()
}
for i := 0; i < len(protoAddrs); i += 1 {
err := <-chErrors
if err != nil {
return job.Error(err)
}
}
return engine.StatusOK
}
func (daemon *Daemon) ContainerChanges(job *engine.Job) engine.Status {
if n := len(job.Args); n != 1 {
return job.Errorf("Usage: %s CONTAINER", job.Name)
}
name := job.Args[0]
if container := daemon.Get(name); container != nil {
outs := engine.NewTable("", 0)
changes, err := container.Changes()
if err != nil {
return job.Error(err)
}
for _, change := range changes {
out := &engine.Env{}
if err := out.Import(change); err != nil {
return job.Error(err)
}
outs.Add(out)
}
if _, err := outs.WriteListTo(job.Stdout); err != nil {
return job.Error(err)
}
} else {
return job.Errorf("No such container: %s", name)
}
return engine.StatusOK
}
func (daemon *Daemon) ContainerCommit(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("Not enough arguments. Usage: %s CONTAINER\n", job.Name)
}
name := job.Args[0]
container := daemon.Get(name)
if container == nil {
return job.Errorf("No such container: %s", name)
}
var (
config = container.Config
newConfig runconfig.Config
)
if err := job.GetenvJson("config", &newConfig); err != nil {
return job.Error(err)
}
if err := runconfig.Merge(&newConfig, config); err != nil {
return job.Error(err)
}
img, err := daemon.Commit(container, job.Getenv("repo"), job.Getenv("tag"), job.Getenv("comment"), job.Getenv("author"), job.GetenvBool("pause"), &newConfig)
if err != nil {
return job.Error(err)
}
job.Printf("%s\n", img.ID)
return engine.StatusOK
}
func (daemon *Daemon) ContainerCopy(job *engine.Job) engine.Status {
if len(job.Args) != 2 {
return job.Errorf("Usage: %s CONTAINER RESOURCE\n", job.Name)
}
var (
name = job.Args[0]
resource = job.Args[1]
)
if container := daemon.Get(name); container != nil {
data, err := container.Copy(resource)
if err != nil {
return job.Error(err)
}
defer data.Close()
if _, err := io.Copy(job.Stdout, data); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
return job.Errorf("No such container: %s", name)
}
// FIXME: Allow to interrupt current push when new push of same image is done.
func (s *TagStore) CmdPush(job *engine.Job) engine.Status {
if n := len(job.Args); n != 1 {
return job.Errorf("Usage: %s IMAGE", job.Name)
}
var (
localName = job.Args[0]
sf = utils.NewStreamFormatter(job.GetenvBool("json"))
authConfig = ®istry.AuthConfig{}
metaHeaders map[string][]string
)
tag := job.Getenv("tag")
job.GetenvJson("authConfig", authConfig)
job.GetenvJson("metaHeaders", &metaHeaders)
if _, err := s.poolAdd("push", localName); err != nil {
return job.Error(err)
}
defer s.poolRemove("push", localName)
// Resolve the Repository name from fqn to endpoint + name
hostname, remoteName, err := registry.ResolveRepositoryName(localName)
if err != nil {
return job.Error(err)
}
endpoint, err := registry.ExpandAndVerifyRegistryUrl(hostname)
if err != nil {
return job.Error(err)
}
img, err := s.graph.Get(localName)
r, err2 := registry.NewSession(authConfig, registry.HTTPRequestFactory(metaHeaders), endpoint, false)
if err2 != nil {
return job.Error(err2)
}
if err != nil {
reposLen := 1
if tag == "" {
reposLen = len(s.Repositories[localName])
}
job.Stdout.Write(sf.FormatStatus("", "The push refers to a repository [%s] (len: %d)", localName, reposLen))
// If it fails, try to get the repository
if localRepo, exists := s.Repositories[localName]; exists {
if err := s.pushRepository(r, job.Stdout, localName, remoteName, localRepo, tag, sf); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
return job.Error(err)
}
var token []string
job.Stdout.Write(sf.FormatStatus("", "The push refers to an image: [%s]", localName))
if _, err := s.pushImage(r, job.Stdout, remoteName, img.ID, endpoint, token, sf); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
func (e *Events) Log(job *engine.Job) engine.Status {
if len(job.Args) != 3 {
return job.Errorf("usage: %s ACTION ID FROM", job.Name)
}
// not waiting for receivers
go e.log(job.Args[0], job.Args[1], job.Args[2])
return engine.StatusOK
}
func (s *TagStore) CmdPull(job *engine.Job) engine.Status {
if n := len(job.Args); n != 1 && n != 2 {
return job.Errorf("Usage: %s IMAGE [TAG]", job.Name)
}
var (
localName = job.Args[0]
tag string
sf = utils.NewStreamFormatter(job.GetenvBool("json"))
authConfig = ®istry.AuthConfig{}
metaHeaders map[string][]string
)
if len(job.Args) > 1 {
tag = job.Args[1]
}
job.GetenvJson("authConfig", authConfig)
job.GetenvJson("metaHeaders", &metaHeaders)
c, err := s.poolAdd("pull", localName+":"+tag)
if err != nil {
if c != nil {
// Another pull of the same repository is already taking place; just wait for it to finish
job.Stdout.Write(sf.FormatStatus("", "Repository %s already being pulled by another client. Waiting.", localName))
<-c
return engine.StatusOK
}
return job.Error(err)
}
defer s.poolRemove("pull", localName+":"+tag)
// Resolve the Repository name from fqn to endpoint + name
hostname, remoteName, err := registry.ResolveRepositoryName(localName)
if err != nil {
return job.Error(err)
}
endpoint, err := registry.ExpandAndVerifyRegistryUrl(hostname)
if err != nil {
return job.Error(err)
}
r, err := registry.NewSession(authConfig, registry.HTTPRequestFactory(metaHeaders), endpoint, true)
if err != nil {
return job.Error(err)
}
if endpoint == registry.IndexServerAddress() {
// If pull "index.docker.io/foo/bar", it's stored locally under "foo/bar"
localName = remoteName
}
if err = s.pullRepository(r, job.Stdout, localName, remoteName, tag, sf, job.GetenvBool("parallel")); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
func (daemon *Daemon) ContainerInspect(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("usage: %s NAME", job.Name)
}
name := job.Args[0]
if container := daemon.Get(name); container != nil {
container.Lock()
defer container.Unlock()
if job.GetenvBool("raw") {
b, err := json.Marshal(&struct {
*Container
HostConfig *runconfig.HostConfig
}{container, container.hostConfig})
if err != nil {
return job.Error(err)
}
job.Stdout.Write(b)
return engine.StatusOK
}
out := &engine.Env{}
out.Set("Id", container.ID)
out.SetAuto("Created", container.Created)
out.Set("Path", container.Path)
out.SetList("Args", container.Args)
out.SetJson("Config", container.Config)
out.SetJson("State", container.State)
out.Set("Image", container.Image)
out.SetJson("NetworkSettings", container.NetworkSettings)
out.Set("ResolvConfPath", container.ResolvConfPath)
out.Set("HostnamePath", container.HostnamePath)
out.Set("HostsPath", container.HostsPath)
out.Set("Name", container.Name)
out.Set("Driver", container.Driver)
out.Set("ExecDriver", container.ExecDriver)
out.Set("MountLabel", container.MountLabel)
out.Set("ProcessLabel", container.ProcessLabel)
out.SetJson("Volumes", container.Volumes)
out.SetJson("VolumesRW", container.VolumesRW)
if children, err := daemon.Children(container.Name); err == nil {
for linkAlias, child := range children {
container.hostConfig.Links = append(container.hostConfig.Links, fmt.Sprintf("%s:%s", child.Name, linkAlias))
}
}
out.SetJson("HostConfig", container.hostConfig)
container.hostConfig.Links = nil
if _, err := out.WriteTo(job.Stdout); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
return job.Errorf("No such container: %s", name)
}
func (daemon *Daemon) ContainerWait(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("Usage: %s", job.Name)
}
name := job.Args[0]
if container := daemon.Get(name); container != nil {
status, _ := container.State.WaitStop(-1 * time.Second)
job.Printf("%d\n", status)
return engine.StatusOK
}
return job.Errorf("%s: no such container: %s", job.Name, name)
}
// FIXME: merge into CmdTag above, and merge "image_tag" and "tag" into a single job.
func (s *TagStore) CmdTagLegacy(job *engine.Job) engine.Status {
if len(job.Args) != 2 && len(job.Args) != 3 {
return job.Errorf("Usage: %s IMAGE REPOSITORY [TAG]\n", job.Name)
}
var tag string
if len(job.Args) == 3 {
tag = job.Args[2]
}
if err := s.Set(job.Args[1], tag, job.Args[0], job.GetenvBool("force")); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
func (daemon *Daemon) ContainerStart(job *engine.Job) engine.Status {
if len(job.Args) < 1 {
return job.Errorf("Usage: %s container_id", job.Name)
}
var (
name = job.Args[0]
container = daemon.Get(name)
)
if container == nil {
return job.Errorf("No such container: %s", name)
}
if container.State.IsRunning() {
return job.Errorf("Container already started")
}
// If no environment was set, then no hostconfig was passed.
if len(job.Environ()) > 0 {
hostConfig := runconfig.ContainerHostConfigFromJob(job)
if err := daemon.setHostConfig(container, hostConfig); err != nil {
return job.Error(err)
}
}
if err := container.Start(); err != nil {
return job.Errorf("Cannot start container %s: %s", name, err)
}
return engine.StatusOK
}
func (s *TagStore) CmdImport(job *engine.Job) engine.Status {
if n := len(job.Args); n != 2 && n != 3 {
return job.Errorf("Usage: %s SRC REPO [TAG]", job.Name)
}
var (
src = job.Args[0]
repo = job.Args[1]
tag string
sf = utils.NewStreamFormatter(job.GetenvBool("json"))
archive archive.ArchiveReader
resp *http.Response
)
if len(job.Args) > 2 {
tag = job.Args[2]
}
if src == "-" {
archive = job.Stdin
} else {
u, err := url.Parse(src)
if err != nil {
return job.Error(err)
}
if u.Scheme == "" {
u.Scheme = "http"
u.Host = src
u.Path = ""
}
job.Stdout.Write(sf.FormatStatus("", "Downloading from %s", u))
resp, err = utils.Download(u.String())
if err != nil {
return job.Error(err)
}
progressReader := utils.ProgressReader(resp.Body, int(resp.ContentLength), job.Stdout, sf, true, "", "Importing")
defer progressReader.Close()
archive = progressReader
}
img, err := s.graph.Create(archive, "", "", "Imported from "+src, "", nil, nil)
if err != nil {
return job.Error(err)
}
// Optionally register the image at REPO/TAG
if repo != "" {
if err := s.Set(repo, tag, img.ID, true); err != nil {
return job.Error(err)
}
}
job.Stdout.Write(sf.FormatStatus("", img.ID))
return engine.StatusOK
}
func (daemon *Daemon) ImageDelete(job *engine.Job) engine.Status {
if n := len(job.Args); n != 1 {
return job.Errorf("Usage: %s IMAGE", job.Name)
}
imgs := engine.NewTable("", 0)
if err := daemon.DeleteImage(job.Eng, job.Args[0], imgs, true, job.GetenvBool("force"), job.GetenvBool("noprune")); err != nil {
return job.Error(err)
}
if len(imgs.Data) == 0 {
return job.Errorf("Conflict, %s wasn't deleted", job.Args[0])
}
if _, err := imgs.WriteListTo(job.Stdout); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
// CmdTag assigns a new name and tag to an existing image. If the tag already exists,
// it is changed and the image previously referenced by the tag loses that reference.
// This may cause the old image to be garbage-collected if its reference count reaches zero.
//
// Syntax: image_tag NEWNAME OLDNAME
// Example: image_tag shykes/myapp:latest shykes/myapp:1.42.0
func (s *TagStore) CmdTag(job *engine.Job) engine.Status {
if len(job.Args) != 2 {
return job.Errorf("usage: %s NEWNAME OLDNAME", job.Name)
}
var (
newName = job.Args[0]
oldName = job.Args[1]
)
newRepo, newTag := parsers.ParseRepositoryTag(newName)
// FIXME: Set should either parse both old and new name, or neither.
// the current prototype is inconsistent.
if err := s.Set(newRepo, newTag, oldName, true); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
// ContainerKill send signal to the container
// If no signal is given (sig 0), then Kill with SIGKILL and wait
// for the container to exit.
// If a signal is given, then just send it to the container and return.
func (daemon *Daemon) ContainerKill(job *engine.Job) engine.Status {
if n := len(job.Args); n < 1 || n > 2 {
return job.Errorf("Usage: %s CONTAINER [SIGNAL]", job.Name)
}
var (
name = job.Args[0]
sig uint64
err error
)
// If we have a signal, look at it. Otherwise, do nothing
if len(job.Args) == 2 && job.Args[1] != "" {
// Check if we passed the signal as a number:
// The largest legal signal is 31, so let's parse on 5 bits
sig, err = strconv.ParseUint(job.Args[1], 10, 5)
if err != nil {
// The signal is not a number, treat it as a string (either like "KILL" or like "SIGKILL")
sig = uint64(signal.SignalMap[strings.TrimPrefix(job.Args[1], "SIG")])
}
if sig == 0 {
return job.Errorf("Invalid signal: %s", job.Args[1])
}
}
if container := daemon.Get(name); container != nil {
// If no signal is passed, or SIGKILL, perform regular Kill (SIGKILL + wait())
if sig == 0 || syscall.Signal(sig) == syscall.SIGKILL {
if err := container.Kill(); err != nil {
return job.Errorf("Cannot kill container %s: %s", name, err)
}
container.LogEvent("kill")
} else {
// Otherwise, just send the requested signal
if err := container.KillSig(int(sig)); err != nil {
return job.Errorf("Cannot kill container %s: %s", name, err)
}
// FIXME: Add event for signals
}
} else {
return job.Errorf("No such container: %s", name)
}
return engine.StatusOK
}
func LinkContainers(job *engine.Job) engine.Status {
var (
action = job.Args[0]
childIP = job.Getenv("ChildIP")
parentIP = job.Getenv("ParentIP")
ignoreErrors = job.GetenvBool("IgnoreErrors")
ports = job.GetenvList("Ports")
)
split := func(p string) (string, string) {
parts := strings.Split(p, "/")
return parts[0], parts[1]
}
for _, p := range ports {
port, proto := split(p)
if output, err := iptables.Raw(action, "FORWARD",
"-i", bridgeIface, "-o", bridgeIface,
"-p", proto,
"-s", parentIP,
"--dport", port,
"-d", childIP,
"-j", "ACCEPT"); !ignoreErrors && err != nil {
return job.Error(err)
} else if len(output) != 0 {
return job.Errorf("Error toggle iptables forward: %s", output)
}
if output, err := iptables.Raw(action, "FORWARD",
"-i", bridgeIface, "-o", bridgeIface,
"-p", proto,
"-s", childIP,
"--sport", port,
"-d", parentIP,
"-j", "ACCEPT"); !ignoreErrors && err != nil {
return job.Error(err)
} else if len(output) != 0 {
return job.Errorf("Error toggle iptables forward: %s", output)
}
}
return engine.StatusOK
}
// release an interface for a select ip
func Release(job *engine.Job) engine.Status {
var (
id = job.Args[0]
containerInterface = currentInterfaces.Get(id)
)
if containerInterface == nil {
return job.Errorf("No network information to release for %s", id)
}
for _, nat := range containerInterface.PortMappings {
if err := portmapper.Unmap(nat); err != nil {
log.Infof("Unable to unmap port %s: %s", nat, err)
}
}
if err := ipallocator.ReleaseIP(bridgeNetwork, &containerInterface.IP); err != nil {
log.Infof("Unable to release ip %s", err)
}
return engine.StatusOK
}
func (daemon *Daemon) ContainerResize(job *engine.Job) engine.Status {
if len(job.Args) != 3 {
return job.Errorf("Not enough arguments. Usage: %s CONTAINER HEIGHT WIDTH\n", job.Name)
}
name := job.Args[0]
height, err := strconv.Atoi(job.Args[1])
if err != nil {
return job.Error(err)
}
width, err := strconv.Atoi(job.Args[2])
if err != nil {
return job.Error(err)
}
if container := daemon.Get(name); container != nil {
if err := container.Resize(height, width); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
return job.Errorf("No such container: %s", name)
}
// Search queries the public registry for images matching the specified
// search terms, and returns the results.
//
// Argument syntax: search TERM
//
// Option environment:
// 'authConfig': json-encoded credentials to authenticate against the registry.
// The search extends to images only accessible via the credentials.
//
// 'metaHeaders': extra HTTP headers to include in the request to the registry.
// The headers should be passed as a json-encoded dictionary.
//
// Output:
// Results are sent as a collection of structured messages (using engine.Table).
// Each result is sent as a separate message.
// Results are ordered by number of stars on the public registry.
func (s *Service) Search(job *engine.Job) engine.Status {
if n := len(job.Args); n != 1 {
return job.Errorf("Usage: %s TERM", job.Name)
}
var (
term = job.Args[0]
metaHeaders = map[string][]string{}
authConfig = &AuthConfig{}
)
job.GetenvJson("authConfig", authConfig)
job.GetenvJson("metaHeaders", metaHeaders)
hostname, term, err := ResolveRepositoryName(term)
if err != nil {
return job.Error(err)
}
hostname, err = ExpandAndVerifyRegistryUrl(hostname)
if err != nil {
return job.Error(err)
}
r, err := NewSession(authConfig, HTTPRequestFactory(metaHeaders), hostname, true)
if err != nil {
return job.Error(err)
}
results, err := r.SearchRepositories(term)
if err != nil {
return job.Error(err)
}
outs := engine.NewTable("star_count", 0)
for _, result := range results.Results {
out := &engine.Env{}
out.Import(result)
outs.Add(out)
}
outs.ReverseSort()
if _, err := outs.WriteListTo(job.Stdout); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
// CmdTarLayer return the tarLayer of the image
func (s *TagStore) CmdTarLayer(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("usage: %s NAME", job.Name)
}
name := job.Args[0]
if image, err := s.LookupImage(name); err == nil && image != nil {
fs, err := image.TarLayer()
if err != nil {
return job.Error(err)
}
defer fs.Close()
if written, err := io.Copy(job.Stdout, fs); err != nil {
return job.Error(err)
} else {
log.Debugf("rendered layer for %s of [%d] size", image.ID, written)
}
return engine.StatusOK
}
return job.Errorf("No such image: %s", name)
}
// CmdSet stores a new image in the graph.
// Images are stored in the graph using 4 elements:
// - A user-defined ID
// - A collection of metadata describing the image
// - A directory tree stored as a tar archive (also called the "layer")
// - A reference to a "parent" ID on top of which the layer should be applied
//
// NOTE: even though the parent ID is only useful in relation to the layer and how
// to apply it (ie you could represent the full directory tree as 'parent_layer + layer',
// it is treated as a top-level property of the image. This is an artifact of early
// design and should probably be cleaned up in the future to simplify the design.
//
// Syntax: image_set ID
// Input:
// - Layer content must be streamed in tar format on stdin. An empty input is
// valid and represents a nil layer.
//
// - Image metadata must be passed in the command environment.
// 'json': a json-encoded object with all image metadata.
// It will be stored as-is, without any encoding/decoding artifacts.
// That is a requirement of the current registry client implementation,
// because a re-encoded json might invalidate the image checksum at
// the next upload, even with functionaly identical content.
func (s *TagStore) CmdSet(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("usage: %s NAME", job.Name)
}
var (
imgJSON = []byte(job.Getenv("json"))
layer = job.Stdin
)
if len(imgJSON) == 0 {
return job.Errorf("mandatory key 'json' is not set")
}
// We have to pass an *image.Image object, even though it will be completely
// ignored in favor of the redundant json data.
// FIXME: the current prototype of Graph.Register is stupid and redundant.
img, err := image.NewImgJSON(imgJSON)
if err != nil {
return job.Error(err)
}
if err := s.graph.Register(imgJSON, layer, img); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
func (s *TagStore) CmdHistory(job *engine.Job) engine.Status {
if n := len(job.Args); n != 1 {
return job.Errorf("Usage: %s IMAGE", job.Name)
}
name := job.Args[0]
foundImage, err := s.LookupImage(name)
if err != nil {
return job.Error(err)
}
lookupMap := make(map[string][]string)
for name, repository := range s.Repositories {
for tag, id := range repository {
// If the ID already has a reverse lookup, do not update it unless for "latest"
if _, exists := lookupMap[id]; !exists {
lookupMap[id] = []string{}
}
lookupMap[id] = append(lookupMap[id], name+":"+tag)
}
}
outs := engine.NewTable("Created", 0)
err = foundImage.WalkHistory(func(img *image.Image) error {
out := &engine.Env{}
out.Set("Id", img.ID)
out.SetInt64("Created", img.Created.Unix())
out.Set("CreatedBy", strings.Join(img.ContainerConfig.Cmd, " "))
out.SetList("Tags", lookupMap[img.ID])
out.SetInt64("Size", img.Size)
outs.Add(out)
return nil
})
if _, err := outs.WriteListTo(job.Stdout); err != nil {
return job.Error(err)
}
return engine.StatusOK
}
// CmdGet returns information about an image.
// If the image doesn't exist, an empty object is returned, to allow
// checking for an image's existence.
func (s *TagStore) CmdGet(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("usage: %s NAME", job.Name)
}
name := job.Args[0]
res := &engine.Env{}
img, err := s.LookupImage(name)
// Note: if the image doesn't exist, LookupImage returns
// nil, nil.
if err != nil {
return job.Error(err)
}
if img != nil {
// We don't directly expose all fields of the Image objects,
// to maintain a clean public API which we can maintain over
// time even if the underlying structure changes.
// We should have done this with the Image object to begin with...
// but we didn't, so now we're doing it here.
//
// Fields that we're probably better off not including:
// - Config/ContainerConfig. Those structs have the same sprawl problem,
// so we shouldn't include them wholesale either.
// - Comment: initially created to fulfill the "every image is a git commit"
// metaphor, in practice people either ignore it or use it as a
// generic description field which it isn't. On deprecation shortlist.
res.SetAuto("Created", img.Created)
res.Set("Author", img.Author)
res.Set("Os", img.OS)
res.Set("Architecture", img.Architecture)
res.Set("DockerVersion", img.DockerVersion)
res.Set("Id", img.ID)
res.Set("Parent", img.Parent)
}
res.WriteTo(job.Stdout)
return engine.StatusOK
}
func (daemon *Daemon) ContainerExport(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("Usage: %s container_id", job.Name)
}
name := job.Args[0]
if container := daemon.Get(name); container != nil {
data, err := container.Export()
if err != nil {
return job.Errorf("%s: %s", name, err)
}
defer data.Close()
// Stream the entire contents of the container (basically a volatile snapshot)
if _, err := io.Copy(job.Stdout, data); err != nil {
return job.Errorf("%s: %s", name, err)
}
// FIXME: factor job-specific LogEvent to engine.Job.Run()
container.LogEvent("export")
return engine.StatusOK
}
return job.Errorf("No such container: %s", name)
}
func (daemon *Daemon) ContainerPause(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("Usage: %s CONTAINER", job.Name)
}
name := job.Args[0]
container := daemon.Get(name)
if container == nil {
return job.Errorf("No such container: %s", name)
}
if err := container.Pause(); err != nil {
return job.Errorf("Cannot pause container %s: %s", name, err)
}
container.LogEvent("pause")
return engine.StatusOK
}
func (daemon *Daemon) ContainerStop(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("Usage: %s CONTAINER\n", job.Name)
}
var (
name = job.Args[0]
t = 10
)
if job.EnvExists("t") {
t = job.GetenvInt("t")
}
if container := daemon.Get(name); container != nil {
if !container.State.IsRunning() {
return job.Errorf("Container already stopped")
}
if err := container.Stop(int(t)); err != nil {
return job.Errorf("Cannot stop container %s: %s\n", name, err)
}
container.LogEvent("stop")
} else {
return job.Errorf("No such container: %s\n", name)
}
return engine.StatusOK
}
func (daemon *Daemon) ContainerRestart(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("Usage: %s CONTAINER\n", job.Name)
}
var (
name = job.Args[0]
t = 10
)
if job.EnvExists("t") {
t = job.GetenvInt("t")
}
if container := daemon.Get(name); container != nil {
if err := container.Restart(int(t)); err != nil {
return job.Errorf("Cannot restart container %s: %s\n", name, err)
}
container.LogEvent("restart")
} else {
return job.Errorf("No such container: %s\n", name)
}
return engine.StatusOK
}
func (daemon *Daemon) ContainerLogs(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
return job.Errorf("Usage: %s CONTAINER\n", job.Name)
}
var (
name = job.Args[0]
stdout = job.GetenvBool("stdout")
stderr = job.GetenvBool("stderr")
tail = job.Getenv("tail")
follow = job.GetenvBool("follow")
times = job.GetenvBool("timestamps")
lines = -1
format string
)
if !(stdout || stderr) {
return job.Errorf("You must choose at least one stream")
}
if times {
format = time.RFC3339Nano
}
if tail == "" {
tail = "all"
}
container := daemon.Get(name)
if container == nil {
return job.Errorf("No such container: %s", name)
}
cLog, err := container.ReadLog("json")
if err != nil && os.IsNotExist(err) {
// Legacy logs
log.Debugf("Old logs format")
if stdout {
cLog, err := container.ReadLog("stdout")
if err != nil {
log.Errorf("Error reading logs (stdout): %s", err)
} else if _, err := io.Copy(job.Stdout, cLog); err != nil {
log.Errorf("Error streaming logs (stdout): %s", err)
}
}
if stderr {
cLog, err := container.ReadLog("stderr")
if err != nil {
log.Errorf("Error reading logs (stderr): %s", err)
} else if _, err := io.Copy(job.Stderr, cLog); err != nil {
log.Errorf("Error streaming logs (stderr): %s", err)
}
}
} else if err != nil {
log.Errorf("Error reading logs (json): %s", err)
} else {
if tail != "all" {
var err error
lines, err = strconv.Atoi(tail)
if err != nil {
log.Errorf("Failed to parse tail %s, error: %v, show all logs", tail, err)
lines = -1
}
}
if lines != 0 {
if lines > 0 {
f := cLog.(*os.File)
ls, err := tailfile.TailFile(f, lines)
if err != nil {
return job.Error(err)
}
tmp := bytes.NewBuffer([]byte{})
for _, l := range ls {
fmt.Fprintf(tmp, "%s\n", l)
}
cLog = tmp
}
dec := json.NewDecoder(cLog)
for {
l := &jsonlog.JSONLog{}
if err := dec.Decode(l); err == io.EOF {
break
} else if err != nil {
log.Errorf("Error streaming logs: %s", err)
break
}
logLine := l.Log
if times {
logLine = fmt.Sprintf("%s %s", l.Created.Format(format), logLine)
}
if l.Stream == "stdout" && stdout {
fmt.Fprintf(job.Stdout, "%s", logLine)
}
if l.Stream == "stderr" && stderr {
fmt.Fprintf(job.Stderr, "%s", logLine)
}
}
}
}
if follow {
errors := make(chan error, 2)
if stdout {
stdoutPipe := container.StdoutLogPipe()
go func() {
errors <- jsonlog.WriteLog(stdoutPipe, job.Stdout, format)
}()
}
if stderr {
stderrPipe := container.StderrLogPipe()
go func() {
errors <- jsonlog.WriteLog(stderrPipe, job.Stderr, format)
}()
}
err := <-errors
if err != nil {
log.Errorf("%s", err)
}
}
return engine.StatusOK
}