mirror of https://github.com/docker/docs.git
130 lines
3.0 KiB
Go
130 lines
3.0 KiB
Go
package graph
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import (
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"encoding/json"
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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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log "github.com/Sirupsen/logrus"
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"github.com/docker/docker/engine"
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"github.com/docker/docker/image"
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"github.com/docker/docker/pkg/archive"
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"github.com/docker/docker/pkg/chrootarchive"
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)
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// Loads a set of images into the repository. This is the complementary of ImageExport.
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// The input stream is an uncompressed tar ball containing images and metadata.
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func (s *TagStore) CmdLoad(job *engine.Job) engine.Status {
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tmpImageDir, err := ioutil.TempDir("", "docker-import-")
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if err != nil {
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return job.Error(err)
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}
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defer os.RemoveAll(tmpImageDir)
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var (
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repoTarFile = path.Join(tmpImageDir, "repo.tar")
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repoDir = path.Join(tmpImageDir, "repo")
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)
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tarFile, err := os.Create(repoTarFile)
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if err != nil {
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return job.Error(err)
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}
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if _, err := io.Copy(tarFile, job.Stdin); err != nil {
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return job.Error(err)
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}
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tarFile.Close()
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repoFile, err := os.Open(repoTarFile)
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if err != nil {
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return job.Error(err)
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}
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if err := os.Mkdir(repoDir, os.ModeDir); err != nil {
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return job.Error(err)
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}
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images, err := s.graph.Map()
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if err != nil {
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return job.Error(err)
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}
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excludes := make([]string, len(images))
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i := 0
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for k := range images {
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excludes[i] = k
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i++
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}
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if err := chrootarchive.Untar(repoFile, repoDir, &archive.TarOptions{Excludes: excludes}); err != nil {
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return job.Error(err)
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}
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dirs, err := ioutil.ReadDir(repoDir)
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if err != nil {
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return job.Error(err)
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}
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for _, d := range dirs {
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if d.IsDir() {
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if err := s.recursiveLoad(job.Eng, d.Name(), tmpImageDir); err != nil {
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return job.Error(err)
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}
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}
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}
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repositoriesJson, err := ioutil.ReadFile(path.Join(tmpImageDir, "repo", "repositories"))
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if err == nil {
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repositories := map[string]Repository{}
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if err := json.Unmarshal(repositoriesJson, &repositories); err != nil {
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return job.Error(err)
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}
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for imageName, tagMap := range repositories {
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for tag, address := range tagMap {
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if err := s.Set(imageName, tag, address, true); err != nil {
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return job.Error(err)
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}
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}
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}
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} else if !os.IsNotExist(err) {
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return job.Error(err)
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}
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return engine.StatusOK
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}
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func (s *TagStore) recursiveLoad(eng *engine.Engine, address, tmpImageDir string) error {
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if err := eng.Job("image_get", address).Run(); err != nil {
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log.Debugf("Loading %s", address)
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imageJson, err := ioutil.ReadFile(path.Join(tmpImageDir, "repo", address, "json"))
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if err != nil {
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log.Debugf("Error reading json", err)
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return err
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}
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layer, err := os.Open(path.Join(tmpImageDir, "repo", address, "layer.tar"))
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if err != nil {
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log.Debugf("Error reading embedded tar", err)
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return err
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}
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img, err := image.NewImgJSON(imageJson)
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if err != nil {
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log.Debugf("Error unmarshalling json", err)
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return err
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}
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if img.Parent != "" {
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if !s.graph.Exists(img.Parent) {
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if err := s.recursiveLoad(eng, img.Parent, tmpImageDir); err != nil {
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return err
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}
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}
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}
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if err := s.graph.Register(img, layer); err != nil {
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return err
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}
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}
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log.Debugf("Completed processing %s", address)
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return nil
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}
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