/
image.go
133 lines (115 loc) · 3.74 KB
/
image.go
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package importer
import (
"encoding/json"
"fmt"
"github.com/docker/distribution/manifest/schema1"
"github.com/docker/distribution/manifest/schema2"
"github.com/docker/distribution/registry/api/errcode"
godigest "github.com/opencontainers/go-digest"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/kubernetes/pkg/api/legacyscheme"
"github.com/openshift/api/image/dockerpre012"
imageapi "github.com/openshift/origin/pkg/image/apis/image"
dockerregistry "github.com/openshift/origin/pkg/image/importer/dockerv1client"
)
func schema1ToImage(manifest *schema1.SignedManifest, d godigest.Digest) (*imageapi.Image, error) {
if len(manifest.History) == 0 {
return nil, fmt.Errorf("image has no v1Compatibility history and cannot be used")
}
dockerImage, err := unmarshalDockerImage([]byte(manifest.History[0].V1Compatibility))
if err != nil {
return nil, err
}
mediatype, payload, err := manifest.Payload()
if err != nil {
return nil, err
}
if len(manifest.Canonical) == 0 {
return nil, fmt.Errorf("unable to load canonical representation from schema1 manifest")
}
payloadDigest := godigest.FromBytes(manifest.Canonical)
if len(d) > 0 && payloadDigest != d {
return nil, fmt.Errorf("content integrity error: the schema 1 manifest retrieved with digest %s does not match the digest calculated from the content %s", d, payloadDigest)
}
dockerImage.ID = payloadDigest.String()
image := &imageapi.Image{
ObjectMeta: metav1.ObjectMeta{
Name: dockerImage.ID,
},
DockerImageMetadata: *dockerImage,
DockerImageManifest: string(payload),
DockerImageManifestMediaType: mediatype,
DockerImageMetadataVersion: "1.0",
}
return image, nil
}
func schema2ToImage(manifest *schema2.DeserializedManifest, imageConfig []byte, d godigest.Digest) (*imageapi.Image, error) {
mediatype, payload, err := manifest.Payload()
if err != nil {
return nil, err
}
dockerImage, err := unmarshalDockerImage(imageConfig)
if err != nil {
return nil, err
}
payloadDigest := godigest.FromBytes(payload)
if len(d) > 0 && payloadDigest != d {
return nil, fmt.Errorf("content integrity error: the schema 2 manifest retrieved with digest %s does not match the digest calculated from the content %s", d, payloadDigest)
}
dockerImage.ID = payloadDigest.String()
image := &imageapi.Image{
ObjectMeta: metav1.ObjectMeta{
Name: dockerImage.ID,
},
DockerImageMetadata: *dockerImage,
DockerImageManifest: string(payload),
DockerImageConfig: string(imageConfig),
DockerImageManifestMediaType: mediatype,
DockerImageMetadataVersion: "1.0",
}
return image, nil
}
func schema0ToImage(dockerImage *dockerregistry.Image) (*imageapi.Image, error) {
var baseImage imageapi.DockerImage
if err := legacyscheme.Scheme.Convert(&dockerImage.Image, &baseImage, nil); err != nil {
return nil, fmt.Errorf("could not convert image: %#v", err)
}
image := &imageapi.Image{
ObjectMeta: metav1.ObjectMeta{
Name: dockerImage.Image.ID,
},
DockerImageMetadata: baseImage,
DockerImageMetadataVersion: "1.0",
}
return image, nil
}
func unmarshalDockerImage(body []byte) (*imageapi.DockerImage, error) {
var image dockerpre012.DockerImage
if err := json.Unmarshal(body, &image); err != nil {
return nil, err
}
dockerImage := &imageapi.DockerImage{}
if err := legacyscheme.Scheme.Convert(&image, dockerImage, nil); err != nil {
return nil, err
}
return dockerImage, nil
}
func isDockerError(err error, code errcode.ErrorCode) bool {
switch t := err.(type) {
case errcode.Errors:
for _, err := range t {
if isDockerError(err, code) {
return true
}
}
case errcode.ErrorCode:
if code == t {
return true
}
case errcode.Error:
if t.ErrorCode() == code {
return true
}
}
return false
}