135 lines
3.8 KiB
Go
135 lines
3.8 KiB
Go
// +build experimental
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package distribution
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import (
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"crypto/sha256"
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"io"
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"net/http"
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"github.com/Sirupsen/logrus"
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"github.com/docker/distribution"
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"github.com/docker/distribution/digest"
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"github.com/docker/distribution/manifest/schema2"
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dockerdist "github.com/docker/docker/distribution"
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"github.com/docker/docker/reference"
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"github.com/docker/docker/registry"
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"github.com/docker/engine-api/types"
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"golang.org/x/net/context"
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)
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// Push pushes a plugin to a registry.
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func Push(name string, rs registry.Service, metaHeader http.Header, authConfig *types.AuthConfig, config io.ReadCloser, layers io.ReadCloser) (digest.Digest, error) {
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ref, err := reference.ParseNamed(name)
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if err != nil {
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return "", err
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}
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repoInfo, err := rs.ResolveRepository(ref)
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if err != nil {
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return "", err
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}
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if err := dockerdist.ValidateRepoName(repoInfo.Name()); err != nil {
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return "", err
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}
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endpoints, err := rs.LookupPushEndpoints(repoInfo.Hostname())
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if err != nil {
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return "", err
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}
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var confirmedV2 bool
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var repository distribution.Repository
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for _, endpoint := range endpoints {
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if confirmedV2 && endpoint.Version == registry.APIVersion1 {
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logrus.Debugf("Skipping v1 endpoint %s because v2 registry was detected", endpoint.URL)
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continue
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}
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repository, confirmedV2, err = dockerdist.NewV2Repository(context.Background(), repoInfo, endpoint, metaHeader, authConfig, "push", "pull")
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if err != nil {
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return "", err
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}
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if !confirmedV2 {
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return "", ErrUnSupportedRegistry
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}
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logrus.Debugf("Trying to push %s to %s %s", repoInfo.Name(), endpoint.URL, endpoint.Version)
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// This means that we found an endpoint. and we are ready to push
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break
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}
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// Returns a reference to the repository's blob service.
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blobs := repository.Blobs(context.Background())
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// Descriptor = {mediaType, size, digest}
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var descs []distribution.Descriptor
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for i, f := range []io.ReadCloser{config, layers} {
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bw, err := blobs.Create(context.Background())
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if err != nil {
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logrus.Debugf("Error in blobs.Create: %v", err)
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return "", err
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}
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h := sha256.New()
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r := io.TeeReader(f, h)
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_, err = io.Copy(bw, r)
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if err != nil {
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logrus.Debugf("Error in io.Copy: %v", err)
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return "", err
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}
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f.Close()
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mt := MediaTypeLayer
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if i == 0 {
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mt = MediaTypeConfig
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}
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// Commit completes the write process to the BlobService.
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// The descriptor arg to Commit is called the "provisional" descriptor and
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// used for validation.
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// The returned descriptor should be the one used. Its called the "Canonical"
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// descriptor.
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desc, err := bw.Commit(context.Background(), distribution.Descriptor{
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MediaType: mt,
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// XXX: What about the Size?
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Digest: digest.NewDigest("sha256", h),
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})
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if err != nil {
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logrus.Debugf("Error in bw.Commit: %v", err)
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return "", err
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}
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// The canonical descriptor is set the mediatype again, just in case.
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// Don't touch the digest or the size here.
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desc.MediaType = mt
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logrus.Debugf("pushed blob: %s %s", desc.MediaType, desc.Digest)
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descs = append(descs, desc)
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}
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// XXX: schema2.Versioned needs a MediaType as well.
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// "application/vnd.docker.distribution.manifest.v2+json"
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m, err := schema2.FromStruct(schema2.Manifest{Versioned: schema2.SchemaVersion, Config: descs[0], Layers: descs[1:]})
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if err != nil {
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logrus.Debugf("error in schema2.FromStruct: %v", err)
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return "", err
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}
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msv, err := repository.Manifests(context.Background())
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if err != nil {
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logrus.Debugf("error in repository.Manifests: %v", err)
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return "", err
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}
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_, pl, err := m.Payload()
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if err != nil {
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logrus.Debugf("error in m.Payload: %v", err)
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return "", err
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}
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logrus.Debugf("Pushed manifest: %s", pl)
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tag := DefaultTag
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if tagged, ok := ref.(reference.NamedTagged); ok {
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tag = tagged.Tag()
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}
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return msv.Put(context.Background(), m, distribution.WithTag(tag))
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}
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