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moby--moby/server.go
2013-05-13 12:26:18 +02:00

574 lines
14 KiB
Go

package docker
import (
"fmt"
"io"
"log"
"net/http"
"net/url"
"os"
"runtime"
"strings"
)
func (srv *Server) DockerVersion() ApiVersion {
return ApiVersion{VERSION, GIT_COMMIT, srv.runtime.capabilities.MemoryLimit, srv.runtime.capabilities.SwapLimit}
}
func (srv *Server) ContainerKill(name string) error {
if container := srv.runtime.Get(name); container != nil {
if err := container.Kill(); err != nil {
return fmt.Errorf("Error restarting container %s: %s", name, err.Error())
}
} else {
return fmt.Errorf("No such container: %s", name)
}
return nil
}
func (srv *Server) ContainerExport(name string, out io.Writer) error {
if container := srv.runtime.Get(name); container != nil {
data, err := container.Export()
if err != nil {
return err
}
// Stream the entire contents of the container (basically a volatile snapshot)
if _, err := io.Copy(out, data); err != nil {
return err
}
return nil
}
return fmt.Errorf("No such container: %s", name)
}
func (srv *Server) ImagesSearch(term string) ([]ApiSearch, error) {
results, err := srv.runtime.graph.SearchRepositories(nil, term)
if err != nil {
return nil, err
}
var outs []ApiSearch
for _, repo := range results.Results {
var out ApiSearch
out.Description = repo["description"]
if len(out.Description) > 45 {
out.Description = Trunc(out.Description, 42) + "..."
}
out.Name = repo["name"]
outs = append(outs, out)
}
return outs, nil
}
func (srv *Server) ImageInsert(name, url, path string, out io.Writer) error {
img, err := srv.runtime.repositories.LookupImage(name)
if err != nil {
return err
}
file, err := Download(url, out)
if err != nil {
return err
}
defer file.Body.Close()
config, _, err := ParseRun([]string{img.Id, "echo", "insert", url, path}, srv.runtime.capabilities)
if err != nil {
return err
}
b := NewBuilder(srv.runtime)
c, err := b.Create(config)
if err != nil {
return err
}
if err := c.Inject(ProgressReader(file.Body, int(file.ContentLength), out, "Downloading %v/%v (%v)"), path); err != nil {
return err
}
// FIXME: Handle custom repo, tag comment, author
img, err = b.Commit(c, "", "", img.Comment, img.Author, nil)
if err != nil {
return err
}
fmt.Fprintf(out, "%s\n", img.Id)
return nil
}
func (srv *Server) ImagesViz(out io.Writer) error {
images, _ := srv.runtime.graph.All()
if images == nil {
return nil
}
out.Write([]byte("digraph docker {\n"))
var (
parentImage *Image
err error
)
for _, image := range images {
parentImage, err = image.GetParent()
if err != nil {
return fmt.Errorf("Error while getting parent image: %v", err)
}
if parentImage != nil {
out.Write([]byte(" \"" + parentImage.ShortId() + "\" -> \"" + image.ShortId() + "\"\n"))
} else {
out.Write([]byte(" base -> \"" + image.ShortId() + "\" [style=invis]\n"))
}
}
reporefs := make(map[string][]string)
for name, repository := range srv.runtime.repositories.Repositories {
for tag, id := range repository {
reporefs[TruncateId(id)] = append(reporefs[TruncateId(id)], fmt.Sprintf("%s:%s", name, tag))
}
}
for id, repos := range reporefs {
out.Write([]byte(" \"" + id + "\" [label=\"" + id + "\\n" + strings.Join(repos, "\\n") + "\",shape=box,fillcolor=\"paleturquoise\",style=\"filled,rounded\"];\n"))
}
out.Write([]byte(" base [style=invisible]\n}\n"))
return nil
}
func (srv *Server) Images(all bool, filter string) ([]ApiImages, error) {
var allImages map[string]*Image
var err error
if all {
allImages, err = srv.runtime.graph.Map()
} else {
allImages, err = srv.runtime.graph.Heads()
}
if err != nil {
return nil, err
}
var outs []ApiImages = []ApiImages{} //produce [] when empty instead of 'null'
for name, repository := range srv.runtime.repositories.Repositories {
if filter != "" && name != filter {
continue
}
for tag, id := range repository {
var out ApiImages
image, err := srv.runtime.graph.Get(id)
if err != nil {
log.Printf("Warning: couldn't load %s from %s/%s: %s", id, name, tag, err)
continue
}
delete(allImages, id)
out.Repository = name
out.Tag = tag
out.Id = image.Id
out.Created = image.Created.Unix()
outs = append(outs, out)
}
}
// Display images which aren't part of a
if filter == "" {
for _, image := range allImages {
var out ApiImages
out.Id = image.Id
out.Created = image.Created.Unix()
outs = append(outs, out)
}
}
return outs, nil
}
func (srv *Server) DockerInfo() ApiInfo {
images, _ := srv.runtime.graph.All()
var imgcount int
if images == nil {
imgcount = 0
} else {
imgcount = len(images)
}
var out ApiInfo
out.Containers = len(srv.runtime.List())
out.Version = VERSION
out.Images = imgcount
out.GoVersion = runtime.Version()
if os.Getenv("DEBUG") != "" {
out.Debug = true
out.NFd = getTotalUsedFds()
out.NGoroutines = runtime.NumGoroutine()
}
return out
}
func (srv *Server) ImageHistory(name string) ([]ApiHistory, error) {
image, err := srv.runtime.repositories.LookupImage(name)
if err != nil {
return nil, err
}
var outs []ApiHistory = []ApiHistory{} //produce [] when empty instead of 'null'
err = image.WalkHistory(func(img *Image) error {
var out ApiHistory
out.Id = srv.runtime.repositories.ImageName(img.ShortId())
out.Created = img.Created.Unix()
out.CreatedBy = strings.Join(img.ContainerConfig.Cmd, " ")
outs = append(outs, out)
return nil
})
return outs, nil
}
func (srv *Server) ContainerChanges(name string) ([]Change, error) {
if container := srv.runtime.Get(name); container != nil {
return container.Changes()
}
return nil, fmt.Errorf("No such container: %s", name)
}
func (srv *Server) Containers(all bool, n int, since, before string) []ApiContainers {
var foundBefore bool
var displayed int
retContainers := []ApiContainers{}
for _, container := range srv.runtime.List() {
if !container.State.Running && !all && n == -1 && since == "" && before == "" {
continue
}
if before != "" {
if container.ShortId() == before {
foundBefore = true
continue
}
if !foundBefore {
continue
}
}
if displayed == n {
break
}
if container.ShortId() == since {
break
}
displayed++
c := ApiContainers{
Id: container.Id,
}
c.Image = srv.runtime.repositories.ImageName(container.Image)
c.Command = fmt.Sprintf("%s %s", container.Path, strings.Join(container.Args, " "))
c.Created = container.Created.Unix()
c.Status = container.State.String()
c.Ports = container.NetworkSettings.PortMappingHuman()
retContainers = append(retContainers, c)
}
return retContainers
}
func (srv *Server) ContainerCommit(name, repo, tag, author, comment string, config *Config) (string, error) {
container := srv.runtime.Get(name)
if container == nil {
return "", fmt.Errorf("No such container: %s", name)
}
img, err := NewBuilder(srv.runtime).Commit(container, repo, tag, comment, author, config)
if err != nil {
return "", err
}
return img.ShortId(), err
}
func (srv *Server) ContainerTag(name, repo, tag string, force bool) error {
if err := srv.runtime.repositories.Set(repo, tag, name, force); err != nil {
return err
}
return nil
}
func (srv *Server) ImagePull(name, tag, registry string, out io.Writer) error {
if registry != "" {
if err := srv.runtime.graph.PullImage(out, name, registry, nil); err != nil {
return err
}
return nil
}
if err := srv.runtime.graph.PullRepository(out, name, tag, srv.runtime.repositories, srv.runtime.authConfig); err != nil {
return err
}
return nil
}
func (srv *Server) ImagePush(name, registry string, out io.Writer) error {
img, err := srv.runtime.graph.Get(name)
if err != nil {
Debugf("The push refers to a repository [%s] (len: %d)\n", name, len(srv.runtime.repositories.Repositories[name]))
// If it fails, try to get the repository
if localRepo, exists := srv.runtime.repositories.Repositories[name]; exists {
if err := srv.runtime.graph.PushRepository(out, name, localRepo, srv.runtime.authConfig); err != nil {
return err
}
return nil
}
return err
}
err = srv.runtime.graph.PushImage(out, img, registry, nil)
if err != nil {
return err
}
return nil
}
func (srv *Server) ImageImport(src, repo, tag string, in io.Reader, out io.Writer) error {
var archive io.Reader
var resp *http.Response
if src == "-" {
archive = in
} else {
u, err := url.Parse(src)
if err != nil {
fmt.Fprintf(out, "Error: %s\n", err)
}
if u.Scheme == "" {
u.Scheme = "http"
u.Host = src
u.Path = ""
}
fmt.Fprintln(out, "Downloading from", u)
// Download with curl (pretty progress bar)
// If curl is not available, fallback to http.Get()
resp, err = Download(u.String(), out)
if err != nil {
return err
}
archive = ProgressReader(resp.Body, int(resp.ContentLength), out, "Importing %v/%v (%v)")
}
img, err := srv.runtime.graph.Create(archive, nil, "Imported from "+src, "", nil)
if err != nil {
return err
}
// Optionally register the image at REPO/TAG
if repo != "" {
if err := srv.runtime.repositories.Set(repo, tag, img.Id, true); err != nil {
return err
}
}
fmt.Fprintln(out, img.ShortId())
return nil
}
func (srv *Server) ContainerCreate(config *Config) (string, error) {
if config.Memory > 0 && !srv.runtime.capabilities.MemoryLimit {
config.Memory = 0
}
if config.Memory > 0 && !srv.runtime.capabilities.SwapLimit {
config.MemorySwap = -1
}
b := NewBuilder(srv.runtime)
container, err := b.Create(config)
if err != nil {
if srv.runtime.graph.IsNotExist(err) {
return "", fmt.Errorf("No such image: %s", config.Image)
}
return "", err
}
return container.ShortId(), nil
}
func (srv *Server) ImageCreateFromFile(dockerfile io.Reader, out io.Writer) error {
img, err := NewBuilder(srv.runtime).Build(dockerfile, out)
if err != nil {
return err
}
fmt.Fprintf(out, "%s\n", img.ShortId())
return nil
}
func (srv *Server) ContainerRestart(name string, t int) error {
if container := srv.runtime.Get(name); container != nil {
if err := container.Restart(t); err != nil {
return fmt.Errorf("Error restarting container %s: %s", name, err.Error())
}
} else {
return fmt.Errorf("No such container: %s", name)
}
return nil
}
func (srv *Server) ContainerDestroy(name string, removeVolume bool) error {
if container := srv.runtime.Get(name); container != nil {
volumes := make(map[string]struct{})
// Store all the deleted containers volumes
for _, volumeId := range container.Volumes {
volumes[volumeId] = struct{}{}
}
if err := srv.runtime.Destroy(container); err != nil {
return fmt.Errorf("Error destroying container %s: %s", name, err.Error())
}
if removeVolume {
// Retrieve all volumes from all remaining containers
usedVolumes := make(map[string]*Container)
for _, container := range srv.runtime.List() {
for _, containerVolumeId := range container.Volumes {
usedVolumes[containerVolumeId] = container
}
}
for volumeId := range volumes {
// If the requested volu
if c, exists := usedVolumes[volumeId]; exists {
log.Printf("The volume %s is used by the container %s. Impossible to remove it. Skipping.\n", volumeId, c.Id)
continue
}
if err := srv.runtime.volumes.Delete(volumeId); err != nil {
return err
}
}
}
} else {
return fmt.Errorf("No such container: %s", name)
}
return nil
}
func (srv *Server) ImageDelete(name string) error {
img, err := srv.runtime.repositories.LookupImage(name)
if err != nil {
return fmt.Errorf("No such image: %s", name)
} else {
if err := srv.runtime.graph.Delete(img.Id); err != nil {
return fmt.Errorf("Error deleting image %s: %s", name, err.Error())
}
}
return nil
}
func (srv *Server) ContainerStart(name string) error {
if container := srv.runtime.Get(name); container != nil {
if err := container.Start(); err != nil {
return fmt.Errorf("Error starting container %s: %s", name, err.Error())
}
} else {
return fmt.Errorf("No such container: %s", name)
}
return nil
}
func (srv *Server) ContainerStop(name string, t int) error {
if container := srv.runtime.Get(name); container != nil {
if err := container.Stop(t); err != nil {
return fmt.Errorf("Error stopping container %s: %s", name, err.Error())
}
} else {
return fmt.Errorf("No such container: %s", name)
}
return nil
}
func (srv *Server) ContainerWait(name string) (int, error) {
if container := srv.runtime.Get(name); container != nil {
return container.Wait(), nil
}
return 0, fmt.Errorf("No such container: %s", name)
}
func (srv *Server) ContainerAttach(name string, logs, stream, stdin, stdout, stderr bool, in io.ReadCloser, out io.Writer) error {
container := srv.runtime.Get(name)
if container == nil {
return fmt.Errorf("No such container: %s", name)
}
//logs
if logs {
if stdout {
cLog, err := container.ReadLog("stdout")
if err != nil {
Debugf(err.Error())
} else if _, err := io.Copy(out, cLog); err != nil {
Debugf(err.Error())
}
}
if stderr {
cLog, err := container.ReadLog("stderr")
if err != nil {
Debugf(err.Error())
} else if _, err := io.Copy(out, cLog); err != nil {
Debugf(err.Error())
}
}
}
//stream
if stream {
if container.State.Ghost {
return fmt.Errorf("Impossible to attach to a ghost container")
}
var (
cStdin io.ReadCloser
cStdout, cStderr io.Writer
cStdinCloser io.Closer
)
if stdin {
r, w := io.Pipe()
go func() {
defer w.Close()
defer Debugf("Closing buffered stdin pipe")
io.Copy(w, in)
}()
cStdin = r
cStdinCloser = in
}
if stdout {
cStdout = out
}
if stderr {
cStderr = out
}
<-container.Attach(cStdin, cStdinCloser, cStdout, cStderr)
// If we are in stdinonce mode, wait for the process to end
// otherwise, simply return
if container.Config.StdinOnce && !container.Config.Tty {
container.Wait()
}
}
return nil
}
func (srv *Server) ContainerInspect(name string) (*Container, error) {
if container := srv.runtime.Get(name); container != nil {
return container, nil
}
return nil, fmt.Errorf("No such container: %s", name)
}
func (srv *Server) ImageInspect(name string) (*Image, error) {
if image, err := srv.runtime.repositories.LookupImage(name); err == nil && image != nil {
return image, nil
}
return nil, fmt.Errorf("No such image: %s", name)
}
func NewServer(autoRestart bool) (*Server, error) {
if runtime.GOARCH != "amd64" {
log.Fatalf("The docker runtime currently only supports amd64 (not %s). This will change in the future. Aborting.", runtime.GOARCH)
}
runtime, err := NewRuntime(autoRestart)
if err != nil {
return nil, err
}
srv := &Server{
runtime: runtime,
}
return srv, nil
}
type Server struct {
runtime *Runtime
}