mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
b682d7cde6
Signed-off-by: Ian Babrou <ibobrik@gmail.com>
432 lines
13 KiB
Go
432 lines
13 KiB
Go
package graph
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import (
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"bytes"
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"fmt"
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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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"strings"
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"sync"
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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/registry"
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"github.com/docker/docker/utils"
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"github.com/docker/libtrust"
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)
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// Retrieve the all the images to be uploaded in the correct order
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func (s *TagStore) getImageList(localRepo map[string]string, requestedTag string) ([]string, map[string][]string, error) {
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var (
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imageList []string
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imagesSeen = make(map[string]bool)
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tagsByImage = make(map[string][]string)
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)
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for tag, id := range localRepo {
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if requestedTag != "" && requestedTag != tag {
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continue
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}
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var imageListForThisTag []string
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tagsByImage[id] = append(tagsByImage[id], tag)
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for img, err := s.graph.Get(id); img != nil; img, err = img.GetParent() {
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if err != nil {
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return nil, nil, err
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}
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if imagesSeen[img.ID] {
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// This image is already on the list, we can ignore it and all its parents
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break
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}
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imagesSeen[img.ID] = true
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imageListForThisTag = append(imageListForThisTag, img.ID)
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}
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// reverse the image list for this tag (so the "most"-parent image is first)
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for i, j := 0, len(imageListForThisTag)-1; i < j; i, j = i+1, j-1 {
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imageListForThisTag[i], imageListForThisTag[j] = imageListForThisTag[j], imageListForThisTag[i]
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}
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// append to main image list
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imageList = append(imageList, imageListForThisTag...)
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}
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if len(imageList) == 0 {
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return nil, nil, fmt.Errorf("No images found for the requested repository / tag")
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}
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log.Debugf("Image list: %v", imageList)
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log.Debugf("Tags by image: %v", tagsByImage)
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return imageList, tagsByImage, nil
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}
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// createImageIndex returns an index of an image's layer IDs and tags.
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func (s *TagStore) createImageIndex(images []string, tags map[string][]string) []*registry.ImgData {
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var imageIndex []*registry.ImgData
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for _, id := range images {
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if tags, hasTags := tags[id]; hasTags {
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// If an image has tags you must add an entry in the image index
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// for each tag
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for _, tag := range tags {
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imageIndex = append(imageIndex, ®istry.ImgData{
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ID: id,
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Tag: tag,
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})
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}
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continue
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}
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// If the image does not have a tag it still needs to be sent to the
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// registry with an empty tag so that it is accociated with the repository
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imageIndex = append(imageIndex, ®istry.ImgData{
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ID: id,
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Tag: "",
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})
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}
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return imageIndex
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}
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type imagePushData struct {
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id string
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endpoint string
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tokens []string
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}
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// lookupImageOnEndpoint checks the specified endpoint to see if an image exists
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// and if it is absent then it sends the image id to the channel to be pushed.
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func lookupImageOnEndpoint(wg *sync.WaitGroup, r *registry.Session, out io.Writer, sf *utils.StreamFormatter,
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images chan imagePushData, imagesToPush chan string) {
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defer wg.Done()
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for image := range images {
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if err := r.LookupRemoteImage(image.id, image.endpoint, image.tokens); err != nil {
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log.Errorf("Error in LookupRemoteImage: %s", err)
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imagesToPush <- image.id
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continue
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}
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out.Write(sf.FormatStatus("", "Image %s already pushed, skipping", utils.TruncateID(image.id)))
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}
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}
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func (s *TagStore) pushImageToEndpoint(endpoint string, out io.Writer, remoteName string, imageIDs []string,
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tags map[string][]string, repo *registry.RepositoryData, sf *utils.StreamFormatter, r *registry.Session) error {
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workerCount := len(imageIDs)
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// start a maximum of 5 workers to check if images exist on the specified endpoint.
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if workerCount > 5 {
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workerCount = 5
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}
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var (
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wg = &sync.WaitGroup{}
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imageData = make(chan imagePushData, workerCount*2)
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imagesToPush = make(chan string, workerCount*2)
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pushes = make(chan map[string]struct{}, 1)
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)
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for i := 0; i < workerCount; i++ {
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wg.Add(1)
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go lookupImageOnEndpoint(wg, r, out, sf, imageData, imagesToPush)
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}
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// start a go routine that consumes the images to push
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go func() {
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shouldPush := make(map[string]struct{})
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for id := range imagesToPush {
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shouldPush[id] = struct{}{}
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}
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pushes <- shouldPush
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}()
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for _, id := range imageIDs {
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imageData <- imagePushData{
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id: id,
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endpoint: endpoint,
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tokens: repo.Tokens,
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}
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}
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// close the channel to notify the workers that there will be no more images to check.
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close(imageData)
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wg.Wait()
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close(imagesToPush)
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// wait for all the images that require pushes to be collected into a consumable map.
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shouldPush := <-pushes
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// finish by pushing any images and tags to the endpoint. The order that the images are pushed
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// is very important that is why we are still itterating over the ordered list of imageIDs.
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for _, id := range imageIDs {
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if _, push := shouldPush[id]; push {
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if _, err := s.pushImage(r, out, id, endpoint, repo.Tokens, sf); err != nil {
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// FIXME: Continue on error?
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return err
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}
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}
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for _, tag := range tags[id] {
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out.Write(sf.FormatStatus("", "Pushing tag for rev [%s] on {%s}", utils.TruncateID(id), endpoint+"repositories/"+remoteName+"/tags/"+tag))
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if err := r.PushRegistryTag(remoteName, id, tag, endpoint, repo.Tokens); err != nil {
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return 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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// pushRepository pushes layers that do not already exist on the registry.
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func (s *TagStore) pushRepository(r *registry.Session, out io.Writer,
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repoInfo *registry.RepositoryInfo, localRepo map[string]string,
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tag string, sf *utils.StreamFormatter) error {
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log.Debugf("Local repo: %s", localRepo)
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out = utils.NewWriteFlusher(out)
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imgList, tags, err := s.getImageList(localRepo, tag)
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if err != nil {
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return err
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}
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out.Write(sf.FormatStatus("", "Sending image list"))
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imageIndex := s.createImageIndex(imgList, tags)
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log.Debugf("Preparing to push %s with the following images and tags", localRepo)
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for _, data := range imageIndex {
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log.Debugf("Pushing ID: %s with Tag: %s", data.ID, data.Tag)
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}
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// Register all the images in a repository with the registry
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// If an image is not in this list it will not be associated with the repository
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repoData, err := r.PushImageJSONIndex(repoInfo.RemoteName, imageIndex, false, nil)
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if err != nil {
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return err
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}
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nTag := 1
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if tag == "" {
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nTag = len(localRepo)
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}
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out.Write(sf.FormatStatus("", "Pushing repository %s (%d tags)", repoInfo.CanonicalName, nTag))
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// push the repository to each of the endpoints only if it does not exist.
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for _, endpoint := range repoData.Endpoints {
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if err := s.pushImageToEndpoint(endpoint, out, repoInfo.RemoteName, imgList, tags, repoData, sf, r); err != nil {
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return err
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}
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}
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_, err = r.PushImageJSONIndex(repoInfo.RemoteName, imageIndex, true, repoData.Endpoints)
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return err
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}
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func (s *TagStore) pushImage(r *registry.Session, out io.Writer, imgID, ep string, token []string, sf *utils.StreamFormatter) (checksum string, err error) {
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out = utils.NewWriteFlusher(out)
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jsonRaw, err := ioutil.ReadFile(path.Join(s.graph.Root, imgID, "json"))
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if err != nil {
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return "", fmt.Errorf("Cannot retrieve the path for {%s}: %s", imgID, err)
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}
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out.Write(sf.FormatProgress(utils.TruncateID(imgID), "Pushing", nil))
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imgData := ®istry.ImgData{
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ID: imgID,
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}
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// Send the json
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if err := r.PushImageJSONRegistry(imgData, jsonRaw, ep, token); err != nil {
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if err == registry.ErrAlreadyExists {
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out.Write(sf.FormatProgress(utils.TruncateID(imgData.ID), "Image already pushed, skipping", nil))
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return "", nil
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}
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return "", err
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}
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layerData, err := s.graph.TempLayerArchive(imgID, sf, out)
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if err != nil {
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return "", fmt.Errorf("Failed to generate layer archive: %s", err)
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}
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defer os.RemoveAll(layerData.Name())
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// Send the layer
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log.Debugf("rendered layer for %s of [%d] size", imgData.ID, layerData.Size)
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checksum, checksumPayload, err := r.PushImageLayerRegistry(imgData.ID, utils.ProgressReader(layerData, int(layerData.Size), out, sf, false, utils.TruncateID(imgData.ID), "Pushing"), ep, token, jsonRaw)
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if err != nil {
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return "", err
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}
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imgData.Checksum = checksum
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imgData.ChecksumPayload = checksumPayload
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// Send the checksum
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if err := r.PushImageChecksumRegistry(imgData, ep, token); err != nil {
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return "", err
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}
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out.Write(sf.FormatProgress(utils.TruncateID(imgData.ID), "Image successfully pushed", nil))
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return imgData.Checksum, nil
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}
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func (s *TagStore) pushV2Repository(r *registry.Session, eng *engine.Engine, out io.Writer, repoInfo *registry.RepositoryInfo, manifestBytes, tag string, sf *utils.StreamFormatter) error {
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if repoInfo.Official {
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j := eng.Job("trust_update_base")
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if err := j.Run(); err != nil {
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log.Errorf("error updating trust base graph: %s", err)
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}
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}
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endpoint, err := r.V2RegistryEndpoint(repoInfo.Index)
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if err != nil {
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return fmt.Errorf("error getting registry endpoint: %s", err)
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}
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auth, err := r.GetV2Authorization(endpoint, repoInfo.RemoteName, false)
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if err != nil {
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return fmt.Errorf("error getting authorization: %s", err)
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}
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// if no manifest is given, generate and sign with the key associated with the local tag store
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if len(manifestBytes) == 0 {
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mBytes, err := s.newManifest(repoInfo.LocalName, repoInfo.RemoteName, tag)
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if err != nil {
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return err
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}
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js, err := libtrust.NewJSONSignature(mBytes)
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if err != nil {
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return err
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}
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if err = js.Sign(s.trustKey); err != nil {
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return err
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}
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signedBody, err := js.PrettySignature("signatures")
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if err != nil {
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return err
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}
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log.Infof("Signed manifest using daemon's key: %s", s.trustKey.KeyID())
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manifestBytes = string(signedBody)
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}
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manifest, verified, err := s.verifyManifest(eng, []byte(manifestBytes))
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if err != nil {
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return fmt.Errorf("error verifying manifest: %s", err)
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}
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if err := checkValidManifest(manifest); err != nil {
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return fmt.Errorf("invalid manifest: %s", err)
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}
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if !verified {
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log.Debugf("Pushing unverified image")
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}
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for i := len(manifest.FSLayers) - 1; i >= 0; i-- {
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var (
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sumStr = manifest.FSLayers[i].BlobSum
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imgJSON = []byte(manifest.History[i].V1Compatibility)
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)
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sumParts := strings.SplitN(sumStr, ":", 2)
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if len(sumParts) < 2 {
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return fmt.Errorf("Invalid checksum: %s", sumStr)
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}
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manifestSum := sumParts[1]
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img, err := image.NewImgJSON(imgJSON)
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if err != nil {
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return fmt.Errorf("Failed to parse json: %s", err)
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}
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img, err = s.graph.Get(img.ID)
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if err != nil {
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return err
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}
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arch, err := img.TarLayer()
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if err != nil {
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return fmt.Errorf("Could not get tar layer: %s", err)
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}
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// Call mount blob
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exists, err := r.HeadV2ImageBlob(endpoint, repoInfo.RemoteName, sumParts[0], manifestSum, auth)
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if err != nil {
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out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Image push failed", nil))
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return err
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}
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if !exists {
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err = r.PutV2ImageBlob(endpoint, repoInfo.RemoteName, sumParts[0], manifestSum, utils.ProgressReader(arch, int(img.Size), out, sf, false, utils.TruncateID(img.ID), "Pushing"), auth)
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if err != nil {
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out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Image push failed", nil))
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return err
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}
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out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Image successfully pushed", nil))
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} else {
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out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Image already exists", nil))
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}
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}
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// push the manifest
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return r.PutV2ImageManifest(endpoint, repoInfo.RemoteName, tag, bytes.NewReader([]byte(manifestBytes)), auth)
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}
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// FIXME: Allow to interrupt current push when new push of same image is done.
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func (s *TagStore) CmdPush(job *engine.Job) engine.Status {
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if n := len(job.Args); n != 1 {
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return job.Errorf("Usage: %s IMAGE", job.Name)
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}
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var (
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localName = job.Args[0]
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sf = utils.NewStreamFormatter(job.GetenvBool("json"))
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authConfig = ®istry.AuthConfig{}
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metaHeaders map[string][]string
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)
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// Resolve the Repository name from fqn to RepositoryInfo
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repoInfo, err := registry.ResolveRepositoryInfo(job, localName)
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if err != nil {
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return job.Error(err)
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}
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tag := job.Getenv("tag")
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manifestBytes := job.Getenv("manifest")
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job.GetenvJson("authConfig", authConfig)
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job.GetenvJson("metaHeaders", &metaHeaders)
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if _, err := s.poolAdd("push", repoInfo.LocalName); err != nil {
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return job.Error(err)
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}
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defer s.poolRemove("push", repoInfo.LocalName)
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endpoint, err := repoInfo.GetEndpoint()
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if err != nil {
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return job.Error(err)
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}
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img, err := s.graph.Get(repoInfo.LocalName)
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r, err2 := registry.NewSession(authConfig, registry.HTTPRequestFactory(metaHeaders), endpoint, false)
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if err2 != nil {
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return job.Error(err2)
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}
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if len(tag) == 0 {
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tag = DEFAULTTAG
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}
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if repoInfo.Index.Official || endpoint.Version == registry.APIVersion2 {
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err := s.pushV2Repository(r, job.Eng, job.Stdout, repoInfo, manifestBytes, tag, sf)
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if err == nil {
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return engine.StatusOK
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}
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// error out, no fallback to V1
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return job.Error(err)
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}
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if err != nil {
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reposLen := 1
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if tag == "" {
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reposLen = len(s.Repositories[repoInfo.LocalName])
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}
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job.Stdout.Write(sf.FormatStatus("", "The push refers to a repository [%s] (len: %d)", repoInfo.CanonicalName, reposLen))
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// If it fails, try to get the repository
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if localRepo, exists := s.Repositories[repoInfo.LocalName]; exists {
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if err := s.pushRepository(r, job.Stdout, repoInfo, localRepo, tag, sf); err != nil {
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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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return job.Error(err)
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}
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var token []string
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job.Stdout.Write(sf.FormatStatus("", "The push refers to an image: [%s]", repoInfo.CanonicalName))
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if _, err := s.pushImage(r, job.Stdout, img.ID, endpoint.String(), token, sf); err != nil {
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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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