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Merge pull request #780 from stevvooe/manifest-storage

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Initial implementation of image manifest storage
This commit is contained in:
Olivier Gambier 2014-11-24 15:27:48 -08:00
commit d825559473
15 changed files with 519 additions and 133 deletions
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11
client/client.go
View file

@ -12,17 +12,18 @@ import (
"github.com/docker/docker-registry"
"github.com/docker/docker-registry/digest"
"github.com/docker/docker-registry/storage"
)
// Client implements the client interface to the registry http api
type Client interface {
// GetImageManifest returns an image manifest for the image at the given
// name, tag pair.
GetImageManifest(name, tag string) (*registry.ImageManifest, error)
GetImageManifest(name, tag string) (*storage.SignedManifest, error)
// PutImageManifest uploads an image manifest for the image at the given
// name, tag pair.
PutImageManifest(name, tag string, imageManifest *registry.ImageManifest) error
PutImageManifest(name, tag string, imageManifest *storage.SignedManifest) error
// DeleteImage removes the image at the given name, tag pair.
DeleteImage(name, tag string) error
@ -81,7 +82,7 @@ type clientImpl struct {
// TODO(bbland): use consistent route generation between server and client
func (r *clientImpl) GetImageManifest(name, tag string) (*registry.ImageManifest, error) {
func (r *clientImpl) GetImageManifest(name, tag string) (*storage.SignedManifest, error) {
response, err := http.Get(r.imageManifestURL(name, tag))
if err != nil {
return nil, err
@ -108,7 +109,7 @@ func (r *clientImpl) GetImageManifest(name, tag string) (*registry.ImageManifest
decoder := json.NewDecoder(response.Body)
manifest := new(registry.ImageManifest)
manifest := new(storage.SignedManifest)
err = decoder.Decode(manifest)
if err != nil {
return nil, err
@ -116,7 +117,7 @@ func (r *clientImpl) GetImageManifest(name, tag string) (*registry.ImageManifest
return manifest, nil
}
func (r *clientImpl) PutImageManifest(name, tag string, manifest *registry.ImageManifest) error {
func (r *clientImpl) PutImageManifest(name, tag string, manifest *storage.SignedManifest) error {
manifestBytes, err := json.Marshal(manifest)
if err != nil {
return err

58
client/client_test.go
View file

@ -9,9 +9,9 @@ import (
"sync"
"testing"
"github.com/docker/docker-registry"
"github.com/docker/docker-registry/common/testutil"
"github.com/docker/docker-registry/digest"
"github.com/docker/docker-registry/storage"
)
type testBlob struct {
@ -33,8 +33,8 @@ func TestPush(t *testing.T) {
},
}
uploadLocations := make([]string, len(testBlobs))
blobs := make([]registry.FSLayer, len(testBlobs))
history := make([]registry.ManifestHistory, len(testBlobs))
blobs := make([]storage.FSLayer, len(testBlobs))
history := make([]storage.ManifestHistory, len(testBlobs))
for i, blob := range testBlobs {
// TODO(bbland): this is returning the same location for all uploads,
@ -42,17 +42,21 @@ func TestPush(t *testing.T) {
// It's sort of okay because we're using unique digests, but this needs
// to change at some point.
uploadLocations[i] = fmt.Sprintf("/v2/%s/blob/test-uuid", name)
blobs[i] = registry.FSLayer{BlobSum: blob.digest}
history[i] = registry.ManifestHistory{V1Compatibility: blob.digest.String()}
blobs[i] = storage.FSLayer{BlobSum: blob.digest}
history[i] = storage.ManifestHistory{V1Compatibility: blob.digest.String()}
}
manifest := &registry.ImageManifest{
Name: name,
Tag: tag,
Architecture: "x86",
FSLayers: blobs,
History: history,
SchemaVersion: 1,
manifest := &storage.SignedManifest{
Manifest: storage.Manifest{
Name: name,
Tag: tag,
Architecture: "x86",
FSLayers: blobs,
History: history,
Versioned: storage.Versioned{
SchemaVersion: 1,
},
},
}
manifestBytes, err := json.Marshal(manifest)
@ -102,7 +106,7 @@ func TestPush(t *testing.T) {
client := New(server.URL)
objectStore := &memoryObjectStore{
mutex: new(sync.Mutex),
manifestStorage: make(map[string]*registry.ImageManifest),
manifestStorage: make(map[string]*storage.SignedManifest),
layerStorage: make(map[digest.Digest]Layer),
}
@ -143,21 +147,25 @@ func TestPull(t *testing.T) {
contents: []byte("some other contents"),
},
}
blobs := make([]registry.FSLayer, len(testBlobs))
history := make([]registry.ManifestHistory, len(testBlobs))
blobs := make([]storage.FSLayer, len(testBlobs))
history := make([]storage.ManifestHistory, len(testBlobs))
for i, blob := range testBlobs {
blobs[i] = registry.FSLayer{BlobSum: blob.digest}
history[i] = registry.ManifestHistory{V1Compatibility: blob.digest.String()}
blobs[i] = storage.FSLayer{BlobSum: blob.digest}
history[i] = storage.ManifestHistory{V1Compatibility: blob.digest.String()}
}
manifest := &registry.ImageManifest{
Name: name,
Tag: tag,
Architecture: "x86",
FSLayers: blobs,
History: history,
SchemaVersion: 1,
manifest := &storage.SignedManifest{
Manifest: storage.Manifest{
Name: name,
Tag: tag,
Architecture: "x86",
FSLayers: blobs,
History: history,
Versioned: storage.Versioned{
SchemaVersion: 1,
},
},
}
manifestBytes, err := json.Marshal(manifest)
@ -191,7 +199,7 @@ func TestPull(t *testing.T) {
client := New(server.URL)
objectStore := &memoryObjectStore{
mutex: new(sync.Mutex),
manifestStorage: make(map[string]*registry.ImageManifest),
manifestStorage: make(map[string]*storage.SignedManifest),
layerStorage: make(map[digest.Digest]Layer),
}

12
client/objectstore.go
View file

@ -7,8 +7,8 @@ import (
"io"
"sync"
"github.com/docker/docker-registry"
"github.com/docker/docker-registry/digest"
"github.com/docker/docker-registry/storage"
)
var (
@ -27,11 +27,11 @@ var (
type ObjectStore interface {
// Manifest retrieves the image manifest stored at the given repository name
// and tag
Manifest(name, tag string) (*registry.ImageManifest, error)
Manifest(name, tag string) (*storage.SignedManifest, error)
// WriteManifest stores an image manifest at the given repository name and
// tag
WriteManifest(name, tag string, manifest *registry.ImageManifest) error
WriteManifest(name, tag string, manifest *storage.SignedManifest) error
// Layer returns a handle to a layer for reading and writing
Layer(dgst digest.Digest) (Layer, error)
@ -84,11 +84,11 @@ type LayerWriter interface {
// memoryObjectStore is an in-memory implementation of the ObjectStore interface
type memoryObjectStore struct {
mutex *sync.Mutex
manifestStorage map[string]*registry.ImageManifest
manifestStorage map[string]*storage.SignedManifest
layerStorage map[digest.Digest]Layer
}
func (objStore *memoryObjectStore) Manifest(name, tag string) (*registry.ImageManifest, error) {
func (objStore *memoryObjectStore) Manifest(name, tag string) (*storage.SignedManifest, error) {
objStore.mutex.Lock()
defer objStore.mutex.Unlock()
@ -99,7 +99,7 @@ func (objStore *memoryObjectStore) Manifest(name, tag string) (*registry.ImageMa
return manifest, nil
}
func (objStore *memoryObjectStore) WriteManifest(name, tag string, manifest *registry.ImageManifest) error {
func (objStore *memoryObjectStore) WriteManifest(name, tag string, manifest *storage.SignedManifest) error {
objStore.mutex.Lock()
defer objStore.mutex.Unlock()

4
client/pull.go
View file

@ -4,7 +4,7 @@ import (
"fmt"
"io"
"github.com/docker/docker-registry"
"github.com/docker/docker-registry/storage"
log "github.com/Sirupsen/logrus"
)
@ -77,7 +77,7 @@ func Pull(c Client, objectStore ObjectStore, name, tag string) error {
return nil
}
func pullLayer(c Client, objectStore ObjectStore, name string, fsLayer registry.FSLayer) error {
func pullLayer(c Client, objectStore ObjectStore, name string, fsLayer storage.FSLayer) error {
log.WithField("layer", fsLayer).Info("Pulling layer")
layer, err := objectStore.Layer(fsLayer.BlobSum)

6
client/push.go
View file

@ -3,7 +3,7 @@ package client
import (
"errors"
"github.com/docker/docker-registry"
"github.com/docker/docker-registry/storage"
log "github.com/Sirupsen/logrus"
)
@ -13,7 +13,7 @@ import (
// push window has been successfully pushed.
const simultaneousLayerPushWindow = 4
type pushFunction func(fsLayer registry.FSLayer) error
type pushFunction func(fsLayer storage.FSLayer) error
// Push implements a client push workflow for the image defined by the given
// name and tag pair, using the given ObjectStore for local manifest and layer
@ -72,7 +72,7 @@ func Push(c Client, objectStore ObjectStore, name, tag string) error {
return nil
}
func pushLayer(c Client, objectStore ObjectStore, name string, fsLayer registry.FSLayer) error {
func pushLayer(c Client, objectStore ObjectStore, name string, fsLayer storage.FSLayer) error {
log.WithField("layer", fsLayer).Info("Pushing layer")
layer, err := objectStore.Layer(fsLayer.BlobSum)

3
errors.go
View file

@ -5,6 +5,7 @@ import (
"strings"
"github.com/docker/docker-registry/digest"
"github.com/docker/docker-registry/storage"
)
// ErrorCode represents the error type. The errors are serialized via strings
@ -212,7 +213,7 @@ type DetailUnknownLayer struct {
// Unknown should contain the contents of a layer descriptor, which is a
// single FSLayer currently.
Unknown FSLayer `json:"unknown"`
Unknown storage.FSLayer `json:"unknown"`
}
// RepositoryNotFoundError is returned when making an operation against a

66
images.go
View file

@ -1,77 +1,11 @@
package registry
import (
"encoding/json"
"net/http"
"github.com/docker/docker-registry/digest"
"github.com/gorilla/handlers"
)
// ImageManifest defines the structure of an image manifest
type ImageManifest struct {
// Name is the name of the image's repository
Name string `json:"name"`
// Tag is the tag of the image specified by this manifest
Tag string `json:"tag"`
// Architecture is the host architecture on which this image is intended to
// run
Architecture string `json:"architecture"`
// FSLayers is a list of filesystem layer blobSums contained in this image
FSLayers []FSLayer `json:"fsLayers"`
// History is a list of unstructured historical data for v1 compatibility
History []ManifestHistory `json:"history"`
// SchemaVersion is the image manifest schema that this image follows
SchemaVersion int `json:"schemaVersion"`
// Raw is the byte representation of the ImageManifest, used for signature
// verification
Raw []byte `json:"-"`
}
// imageManifest is used to avoid recursion in unmarshaling
type imageManifest ImageManifest
// UnmarshalJSON populates a new ImageManifest struct from JSON data.
func (m *ImageManifest) UnmarshalJSON(b []byte) error {
var manifest imageManifest
err := json.Unmarshal(b, &manifest)
if err != nil {
return err
}
*m = ImageManifest(manifest)
m.Raw = b
return nil
}
// FSLayer is a container struct for BlobSums defined in an image manifest
type FSLayer struct {
// BlobSum is the tarsum of the referenced filesystem image layer
BlobSum digest.Digest `json:"blobSum"`
}
// ManifestHistory stores unstructured v1 compatibility information
type ManifestHistory struct {
// V1Compatibility is the raw v1 compatibility information
V1Compatibility string `json:"v1Compatibility"`
}
// Checksum is a container struct for an image checksum
type Checksum struct {
// HashAlgorithm is the algorithm used to compute the checksum
// Supported values: md5, sha1, sha256, sha512
HashAlgorithm string
// Sum is the actual checksum value for the given HashAlgorithm
Sum string
}
// imageManifestDispatcher takes the request context and builds the
// appropriate handler for handling image manifest requests.
func imageManifestDispatcher(ctx *Context, r *http.Request) http.Handler {

2
layer.go
View file

@ -52,7 +52,7 @@ func (lh *layerHandler) GetLayer(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
lh.Errors.Push(ErrorCodeUnknownLayer,
map[string]interface{}{
"unknown": FSLayer{BlobSum: lh.Digest},
"unknown": storage.FSLayer{BlobSum: lh.Digest},
})
return
default:

17
storage/layer.go
View file

@ -8,23 +8,6 @@ import (
"github.com/docker/docker-registry/digest"
)
// LayerService provides operations on layer files in a backend storage.
type LayerService interface {
// Exists returns true if the layer exists.
Exists(name string, digest digest.Digest) (bool, error)
// Fetch the layer identifed by TarSum.
Fetch(name string, digest digest.Digest) (Layer, error)
// Upload begins a layer upload to repository identified by name,
// returning a handle.
Upload(name string) (LayerUpload, error)
// Resume continues an in progress layer upload, returning the current
// state of the upload.
Resume(uuid string) (LayerUpload, error)
}
// Layer provides a readable and seekable layer object. Typically,
// implementations are *not* goroutine safe.
type Layer interface {

125
storage/manifest.go Normal file
View file

@ -0,0 +1,125 @@
package storage
import (
"encoding/json"
"fmt"
"github.com/docker/libtrust"
"github.com/docker/docker-registry/digest"
)
var (
// ErrManifestUnknown is returned if the manifest is not known by the
// registry.
ErrManifestUnknown = fmt.Errorf("unknown manifest")
// ErrManifestUnverified is returned when the registry is unable to verify
// the manifest.
ErrManifestUnverified = fmt.Errorf("unverified manifest")
)
// Versioned provides a struct with just the manifest schemaVersion. Incoming
// content with unknown schema version can be decoded against this struct to
// check the version.
type Versioned struct {
// SchemaVersion is the image manifest schema that this image follows
SchemaVersion int `json:"schemaVersion"`
}
// Manifest provides the base accessible fields for working with V2 image
// format in the registry.
type Manifest struct {
Versioned
// Name is the name of the image's repository
Name string `json:"name"`
// Tag is the tag of the image specified by this manifest
Tag string `json:"tag"`
// Architecture is the host architecture on which this image is intended to
// run
Architecture string `json:"architecture"`
// FSLayers is a list of filesystem layer blobSums contained in this image
FSLayers []FSLayer `json:"fsLayers"`
// History is a list of unstructured historical data for v1 compatibility
History []ManifestHistory `json:"history"`
}
// Sign signs the manifest with the provided private key, returning a
// SignedManifest. This typically won't be used within the registry, except
// for testing.
func (m *Manifest) Sign(pk libtrust.PrivateKey) (*SignedManifest, error) {
p, err := json.Marshal(m)
if err != nil {
return nil, err
}
js, err := libtrust.NewJSONSignature(p)
if err != nil {
return nil, err
}
if err := js.Sign(pk); err != nil {
return nil, err
}
pretty, err := js.PrettySignature("signatures")
if err != nil {
return nil, err
}
return &SignedManifest{
Manifest: *m,
Raw: pretty,
}, nil
}
// SignedManifest provides an envelope for
type SignedManifest struct {
Manifest
// Raw is the byte representation of the ImageManifest, used for signature
// verification. The manifest byte representation cannot change or it will
// have to be re-signed.
Raw []byte `json:"-"`
}
// UnmarshalJSON populates a new ImageManifest struct from JSON data.
func (m *SignedManifest) UnmarshalJSON(b []byte) error {
var manifest Manifest
if err := json.Unmarshal(b, &manifest); err != nil {
return err
}
m.Manifest = manifest
m.Raw = b
return nil
}
// MarshalJSON returns the contents of raw. If Raw is nil, marshals the inner
// contents.
func (m *SignedManifest) MarshalJSON() ([]byte, error) {
if len(m.Raw) > 0 {
return m.Raw, nil
}
// If the raw data is not available, just dump the inner content.
return json.Marshal(&m.Manifest)
}
// FSLayer is a container struct for BlobSums defined in an image manifest
type FSLayer struct {
// BlobSum is the tarsum of the referenced filesystem image layer
BlobSum digest.Digest `json:"blobSum"`
}
// ManifestHistory stores unstructured v1 compatibility information
type ManifestHistory struct {
// V1Compatibility is the raw v1 compatibility information
V1Compatibility string `json:"v1Compatibility"`
}

139
storage/manifest_test.go Normal file
View file

@ -0,0 +1,139 @@
package storage
import (
"reflect"
"testing"
"github.com/docker/libtrust"
"github.com/docker/docker-registry/digest"
"github.com/docker/docker-registry/storagedriver/inmemory"
)
func TestManifestStorage(t *testing.T) {
driver := inmemory.New()
ms := &manifestStore{
driver: driver,
pathMapper: &pathMapper{
root: "/storage/testing",
version: storagePathVersion,
},
layerService: newMockedLayerService(),
}
name := "foo/bar"
tag := "thetag"
exists, err := ms.Exists(name, tag)
if err != nil {
t.Fatalf("unexpected error checking manifest existence: %v", err)
}
if exists {
t.Fatalf("manifest should not exist")
}
if _, err := ms.Get(name, tag); err != ErrManifestUnknown {
t.Fatalf("expected manifest unknown error: %v != %v", err, ErrManifestUnknown)
}
manifest := Manifest{
Versioned: Versioned{
SchemaVersion: 1,
},
Name: name,
Tag: tag,
FSLayers: []FSLayer{
{
BlobSum: "asdf",
},
{
BlobSum: "qwer",
},
},
}
pk, err := libtrust.GenerateECP256PrivateKey()
if err != nil {
t.Fatalf("unexpected error generating private key: %v", err)
}
sm, err := manifest.Sign(pk)
if err != nil {
t.Fatalf("error signing manifest: %v", err)
}
err = ms.Put(name, tag, sm)
if err == nil {
t.Fatalf("expected errors putting manifest")
}
// TODO(stevvooe): We expect errors describing all of the missing layers.
ms.layerService.(*mockedExistenceLayerService).add(name, "asdf")
ms.layerService.(*mockedExistenceLayerService).add(name, "qwer")
if err = ms.Put(name, tag, sm); err != nil {
t.Fatalf("unexpected error putting manifest: %v", err)
}
exists, err = ms.Exists(name, tag)
if err != nil {
t.Fatalf("unexpected error checking manifest existence: %v", err)
}
if !exists {
t.Fatalf("manifest should exist")
}
fetchedManifest, err := ms.Get(name, tag)
if err != nil {
t.Fatalf("unexpected error fetching manifest: %v", err)
}
if !reflect.DeepEqual(fetchedManifest, sm) {
t.Fatalf("fetched manifest not equal: %#v != %#v", fetchedManifest, sm)
}
}
type layerKey struct {
name string
digest digest.Digest
}
type mockedExistenceLayerService struct {
exists map[layerKey]struct{}
}
func newMockedLayerService() *mockedExistenceLayerService {
return &mockedExistenceLayerService{
exists: make(map[layerKey]struct{}),
}
}
var _ LayerService = &mockedExistenceLayerService{}
func (mels *mockedExistenceLayerService) add(name string, digest digest.Digest) {
mels.exists[layerKey{name: name, digest: digest}] = struct{}{}
}
func (mels *mockedExistenceLayerService) remove(name string, digest digest.Digest) {
delete(mels.exists, layerKey{name: name, digest: digest})
}
func (mels *mockedExistenceLayerService) Exists(name string, digest digest.Digest) (bool, error) {
_, ok := mels.exists[layerKey{name: name, digest: digest}]
return ok, nil
}
func (mockedExistenceLayerService) Fetch(name string, digest digest.Digest) (Layer, error) {
panic("not implemented")
}
func (mockedExistenceLayerService) Upload(name string) (LayerUpload, error) {
panic("not implemented")
}
func (mockedExistenceLayerService) Resume(uuid string) (LayerUpload, error) {
panic("not implemented")
}

134
storage/manifeststore.go Normal file
View file

@ -0,0 +1,134 @@
package storage
import (
"encoding/json"
"fmt"
"github.com/docker/libtrust"
"github.com/docker/docker-registry/storagedriver"
)
type manifestStore struct {
driver storagedriver.StorageDriver
pathMapper *pathMapper
layerService LayerService
}
var _ ManifestService = &manifestStore{}
func (ms *manifestStore) Exists(name, tag string) (bool, error) {
p, err := ms.path(name, tag)
if err != nil {
return false, err
}
size, err := ms.driver.CurrentSize(p)
if err != nil {
return false, err
}
if size == 0 {
return false, nil
}
return true, nil
}
func (ms *manifestStore) Get(name, tag string) (*SignedManifest, error) {
p, err := ms.path(name, tag)
if err != nil {
return nil, err
}
content, err := ms.driver.GetContent(p)
if err != nil {
switch err := err.(type) {
case storagedriver.PathNotFoundError, *storagedriver.PathNotFoundError:
return nil, ErrManifestUnknown
default:
return nil, err
}
}
var manifest SignedManifest
if err := json.Unmarshal(content, &manifest); err != nil {
// TODO(stevvooe): Corrupted manifest error?
return nil, err
}
// TODO(stevvooe): Verify the manifest here?
return &manifest, nil
}
func (ms *manifestStore) Put(name, tag string, manifest *SignedManifest) error {
p, err := ms.path(name, tag)
if err != nil {
return err
}
if err := ms.verifyManifest(name, tag, manifest); err != nil {
return err
}
// TODO(stevvooe): Should we get manifest first?
return ms.driver.PutContent(p, manifest.Raw)
}
func (ms *manifestStore) Delete(name, tag string) error {
panic("not implemented")
}
func (ms *manifestStore) path(name, tag string) (string, error) {
return ms.pathMapper.path(manifestPathSpec{
name: name,
tag: tag,
})
}
func (ms *manifestStore) verifyManifest(name, tag string, manifest *SignedManifest) error {
if manifest.Name != name {
return fmt.Errorf("name does not match manifest name")
}
if manifest.Tag != tag {
return fmt.Errorf("tag does not match manifest tag")
}
var errs []error
for _, fsLayer := range manifest.FSLayers {
exists, err := ms.layerService.Exists(name, fsLayer.BlobSum)
if err != nil {
// TODO(stevvooe): Need to store information about missing blob.
errs = append(errs, err)
}
if !exists {
errs = append(errs, fmt.Errorf("missing layer %v", fsLayer.BlobSum))
}
}
if len(errs) != 0 {
// TODO(stevvooe): These need to be recoverable by a caller.
return fmt.Errorf("missing layers: %v", errs)
}
js, err := libtrust.ParsePrettySignature(manifest.Raw, "signatures")
if err != nil {
return err
}
_, err = js.Verify() // These pubkeys need to be checked.
if err != nil {
return err
}
// TODO(sday): Pubkey checks need to go here. This where things get fancy.
// Perhaps, an injected service would reduce coupling here.
return nil
}

28
storage/paths.go
View file

@ -24,7 +24,7 @@ const storagePathVersion = "v2"
// <root>/v2
// -> repositories/
// -><name>/
// -> images/
// -> manifests/
// <manifests by tag name>
// -> layers/
// -> tarsum/
@ -48,6 +48,7 @@ const storagePathVersion = "v2"
//
// We cover the path formats implemented by this path mapper below.
//
// manifestPathSpec: <root>/v2/repositories/<name>/manifests/<tag>
// layerLinkPathSpec: <root>/v2/repositories/<name>/layers/tarsum/<tarsum version>/<tarsum hash alg>/<tarsum hash>
// layerIndexLinkPathSpec: <root>/v2/layerindex/tarsum/<tarsum version>/<tarsum hash alg>/<tarsum hash>
// blobPathSpec: <root>/v2/blob/sha256/<first two hex bytes of digest>/<hex digest>
@ -84,7 +85,13 @@ func (pm *pathMapper) path(spec pathSpec) (string, error) {
// to an intermediate path object, than can be consumed and mapped by the
// other version.
rootPrefix := []string{pm.root, pm.version}
repoPrefix := append(rootPrefix, "repositories")
switch v := spec.(type) {
case manifestPathSpec:
// TODO(sday): May need to store manifest by architecture.
return path.Join(append(repoPrefix, v.name, "manifests", v.tag)...), nil
case layerLinkPathSpec:
if !strings.HasPrefix(v.digest.Algorithm(), "tarsum") {
// Only tarsum is supported, for now
@ -101,9 +108,8 @@ func (pm *pathMapper) path(spec pathSpec) (string, error) {
return "", err
}
p := path.Join(append([]string{pm.root, pm.version, "repositories", v.name, "layers"}, tarSumInfoPathComponents(tsi)...)...)
return p, nil
return path.Join(append(append(repoPrefix, v.name, "layers"),
tarSumInfoPathComponents(tsi)...)...), nil
case layerIndexLinkPathSpec:
if !strings.HasPrefix(v.digest.Algorithm(), "tarsum") {
// Only tarsum is supported, for now
@ -120,9 +126,8 @@ func (pm *pathMapper) path(spec pathSpec) (string, error) {
return "", err
}
p := path.Join(append([]string{pm.root, pm.version, "layerindex"}, tarSumInfoPathComponents(tsi)...)...)
return p, nil
return path.Join(append(append(rootPrefix, "layerindex"),
tarSumInfoPathComponents(tsi)...)...), nil
case blobPathSpec:
p := path.Join([]string{pm.root, pm.version, "blob", v.alg, v.digest[:2], v.digest}...)
return p, nil
@ -139,6 +144,15 @@ type pathSpec interface {
pathSpec()
}
// manifestPathSpec describes the path elements used to build a manifest path.
// The contents should be a signed manifest json file.
type manifestPathSpec struct {
name string
tag string
}
func (manifestPathSpec) pathSpec() {}
// layerLink specifies a path for a layer link, which is a file with a blob
// id. The layer link will contain a content addressable blob id reference
// into the blob store. The format of the contents is as follows:

7
storage/paths_test.go
View file

@ -16,6 +16,13 @@ func TestPathMapper(t *testing.T) {
expected string
err error
}{
{
spec: manifestPathSpec{
name: "foo/bar",
tag: "thetag",
},
expected: "/pathmapper-test/repositories/foo/bar/manifests/thetag",
},
{
spec: layerLinkPathSpec{
name: "foo/bar",

40
storage/services.go
View file

@ -1,6 +1,7 @@
package storage
import (
"github.com/docker/docker-registry/digest"
"github.com/docker/docker-registry/storagedriver"
)
@ -41,3 +42,42 @@ func NewServices(driver storagedriver.StorageDriver) *Services {
func (ss *Services) Layers() LayerService {
return &layerStore{driver: ss.driver, pathMapper: ss.pathMapper, uploadStore: ss.layerUploadStore}
}
// Manifests returns an instance of ManifestService. Instantiation is cheap and
// may be context sensitive in the future. The instance should be used similar
// to a request local.
func (ss *Services) Manifests() ManifestService {
return &manifestStore{driver: ss.driver, pathMapper: ss.pathMapper, layerService: ss.Layers()}
}
// ManifestService provides operations on image manifests.
type ManifestService interface {
// Exists returns true if the layer exists.
Exists(name, tag string) (bool, error)
// Get retrieves the named manifest, if it exists.
Get(name, tag string) (*SignedManifest, error)
// Put creates or updates the named manifest.
Put(name, tag string, manifest *SignedManifest) error
// Delete removes the named manifest, if it exists.
Delete(name, tag string) error
}
// LayerService provides operations on layer files in a backend storage.
type LayerService interface {
// Exists returns true if the layer exists.
Exists(name string, digest digest.Digest) (bool, error)
// Fetch the layer identifed by TarSum.
Fetch(name string, digest digest.Digest) (Layer, error)
// Upload begins a layer upload to repository identified by name,
// returning a handle.
Upload(name string) (LayerUpload, error)
// Resume continues an in progress layer upload, returning the current
// state of the upload.
Resume(uuid string) (LayerUpload, error)
}