DockerCLI/cli/command/manifest/push.go

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package manifest
import (
"encoding/json"
"fmt"
"io"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/manifest/types"
registryclient "github.com/docker/cli/cli/registry/client"
"github.com/docker/distribution/manifest/manifestlist"
"github.com/docker/distribution/manifest/schema2"
"github.com/docker/distribution/reference"
"github.com/docker/docker/registry"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
type pushOpts struct {
insecure bool
purge bool
target string
}
type mountRequest struct {
ref reference.Named
manifest types.ImageManifest
}
type manifestBlob struct {
canonical reference.Canonical
os string
}
type pushRequest struct {
targetRef reference.Named
list *manifestlist.DeserializedManifestList
mountRequests []mountRequest
manifestBlobs []manifestBlob
insecure bool
}
func newPushListCommand(dockerCli command.Cli) *cobra.Command {
opts := pushOpts{}
cmd := &cobra.Command{
Use: "push [OPTIONS] MANIFEST_LIST",
Short: "Push a manifest list to a repository",
Args: cli.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
opts.target = args[0]
return runPush(dockerCli, opts)
},
}
flags := cmd.Flags()
flags.BoolVarP(&opts.purge, "purge", "p", false, "Remove the local manifest list after push")
flags.BoolVar(&opts.insecure, "insecure", false, "Allow push to an insecure registry")
return cmd
}
func runPush(dockerCli command.Cli, opts pushOpts) error {
targetRef, err := normalizeReference(opts.target)
if err != nil {
return err
}
manifests, err := dockerCli.ManifestStore().GetList(targetRef)
if err != nil {
return err
}
if len(manifests) == 0 {
return errors.Errorf("%s not found", targetRef)
}
pushRequest, err := buildPushRequest(manifests, targetRef, opts.insecure)
if err != nil {
return err
}
ctx := context.Background()
if err := pushList(ctx, dockerCli, pushRequest); err != nil {
return err
}
if opts.purge {
return dockerCli.ManifestStore().Remove(targetRef)
}
return nil
}
func buildPushRequest(manifests []types.ImageManifest, targetRef reference.Named, insecure bool) (pushRequest, error) {
req := pushRequest{targetRef: targetRef, insecure: insecure}
var err error
req.list, err = buildManifestList(manifests, targetRef)
if err != nil {
return req, err
}
targetRepo, err := registry.ParseRepositoryInfo(targetRef)
if err != nil {
return req, err
}
targetRepoName, err := registryclient.RepoNameForReference(targetRepo.Name)
if err != nil {
return req, err
}
for _, imageManifest := range manifests {
manifestRepoName, err := registryclient.RepoNameForReference(imageManifest.Ref)
if err != nil {
return req, err
}
repoName, _ := reference.WithName(manifestRepoName)
if repoName.Name() != targetRepoName {
blobs, err := buildBlobRequestList(imageManifest, repoName)
if err != nil {
return req, err
}
req.manifestBlobs = append(req.manifestBlobs, blobs...)
manifestPush, err := buildPutManifestRequest(imageManifest, targetRef)
if err != nil {
return req, err
}
req.mountRequests = append(req.mountRequests, manifestPush)
}
}
return req, nil
}
func buildManifestList(manifests []types.ImageManifest, targetRef reference.Named) (*manifestlist.DeserializedManifestList, error) {
targetRepoInfo, err := registry.ParseRepositoryInfo(targetRef)
if err != nil {
return nil, err
}
descriptors := []manifestlist.ManifestDescriptor{}
for _, imageManifest := range manifests {
if imageManifest.Platform.Architecture == "" || imageManifest.Platform.OS == "" {
return nil, errors.Errorf(
"manifest %s must have an OS and Architecture to be pushed to a registry", imageManifest.Ref)
}
descriptor, err := buildManifestDescriptor(targetRepoInfo, imageManifest)
if err != nil {
return nil, err
}
descriptors = append(descriptors, descriptor)
}
return manifestlist.FromDescriptors(descriptors)
}
func buildManifestDescriptor(targetRepo *registry.RepositoryInfo, imageManifest types.ImageManifest) (manifestlist.ManifestDescriptor, error) {
repoInfo, err := registry.ParseRepositoryInfo(imageManifest.Ref)
if err != nil {
return manifestlist.ManifestDescriptor{}, err
}
manifestRepoHostname := reference.Domain(repoInfo.Name)
targetRepoHostname := reference.Domain(targetRepo.Name)
if manifestRepoHostname != targetRepoHostname {
return manifestlist.ManifestDescriptor{}, errors.Errorf("cannot use source images from a different registry than the target image: %s != %s", manifestRepoHostname, targetRepoHostname)
}
mediaType, raw, err := imageManifest.Payload()
if err != nil {
return manifestlist.ManifestDescriptor{}, err
}
manifest := manifestlist.ManifestDescriptor{
Platform: imageManifest.Platform,
}
manifest.Descriptor.Digest = imageManifest.Digest
manifest.Size = int64(len(raw))
manifest.MediaType = mediaType
if err = manifest.Descriptor.Digest.Validate(); err != nil {
return manifestlist.ManifestDescriptor{}, errors.Wrapf(err,
"digest parse of image %q failed", imageManifest.Ref)
}
return manifest, nil
}
func buildBlobRequestList(imageManifest types.ImageManifest, repoName reference.Named) ([]manifestBlob, error) {
var blobReqs []manifestBlob
for _, blobDigest := range imageManifest.Blobs() {
canonical, err := reference.WithDigest(repoName, blobDigest)
if err != nil {
return nil, err
}
blobReqs = append(blobReqs, manifestBlob{canonical: canonical, os: imageManifest.Platform.OS})
}
return blobReqs, nil
}
// nolint: interfacer
func buildPutManifestRequest(imageManifest types.ImageManifest, targetRef reference.Named) (mountRequest, error) {
refWithoutTag, err := reference.WithName(targetRef.Name())
if err != nil {
return mountRequest{}, err
}
mountRef, err := reference.WithDigest(refWithoutTag, imageManifest.Digest)
if err != nil {
return mountRequest{}, err
}
// This indentation has to be added to ensure sha parity with the registry
v2ManifestBytes, err := json.MarshalIndent(imageManifest.SchemaV2Manifest, "", " ")
if err != nil {
return mountRequest{}, err
}
// indent only the DeserializedManifest portion of this, in order to maintain parity with the registry
// and not alter the sha
var v2Manifest schema2.DeserializedManifest
if err = v2Manifest.UnmarshalJSON(v2ManifestBytes); err != nil {
return mountRequest{}, err
}
imageManifest.SchemaV2Manifest = &v2Manifest
return mountRequest{ref: mountRef, manifest: imageManifest}, err
}
func pushList(ctx context.Context, dockerCli command.Cli, req pushRequest) error {
rclient := dockerCli.RegistryClient(req.insecure)
if err := mountBlobs(ctx, rclient, req.targetRef, req.manifestBlobs); err != nil {
return err
}
if err := pushReferences(ctx, dockerCli.Out(), rclient, req.mountRequests); err != nil {
return err
}
dgst, err := rclient.PutManifest(ctx, req.targetRef, req.list)
if err != nil {
return err
}
fmt.Fprintln(dockerCli.Out(), dgst.String())
return nil
}
func pushReferences(ctx context.Context, out io.Writer, client registryclient.RegistryClient, mounts []mountRequest) error {
for _, mount := range mounts {
newDigest, err := client.PutManifest(ctx, mount.ref, mount.manifest)
if err != nil {
return err
}
fmt.Fprintf(out, "Pushed ref %s with digest: %s\n", mount.ref, newDigest)
}
return nil
}
func mountBlobs(ctx context.Context, client registryclient.RegistryClient, ref reference.Named, blobs []manifestBlob) error {
for _, blob := range blobs {
err := client.MountBlob(ctx, blob.canonical, ref)
switch err.(type) {
case nil:
case registryclient.ErrBlobCreated:
if blob.os != "windows" {
return fmt.Errorf("error mounting %s to %s", blob.canonical, ref)
}
default:
return err
}
}
return nil
}