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[WIP] Replace ImageStreamMapping by ImageStreamImport #16475

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[WIP] Replace ImageStreamMapping by ImageStreamImport #16475

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6 changes: 3 additions & 3 deletions pkg/dockerregistry/server/client/client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@ type Interface interface {
ImageSignaturesInterfacer
ImagesInterfacer
ImageStreamImagesNamespacer
ImageStreamMappingsNamespacer
ImageStreamImportsNamespacer
ImageStreamSecretsNamespacer
ImageStreamsNamespacer
ImageStreamTagsNamespacer
Expand Down Expand Up @@ -75,8 +75,8 @@ func (c *apiClient) ImageStreamImages(namespace string) ImageStreamImageInterfac
return c.image.ImageStreamImages(namespace)
}

func (c *apiClient) ImageStreamMappings(namespace string) ImageStreamMappingInterface {
return c.image.ImageStreamMappings(namespace)
func (c *apiClient) ImageStreamImports(namespace string) ImageStreamImportInterface {
return c.image.ImageStreamImports(namespace)
}

func (c *apiClient) ImageStreamTags(namespace string) ImageStreamTagInterface {
Expand Down
10 changes: 5 additions & 5 deletions pkg/dockerregistry/server/client/interfaces.go
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Expand Up @@ -35,8 +35,8 @@ type ImageStreamsNamespacer interface {
ImageStreams(namespace string) ImageStreamInterface
}

type ImageStreamMappingsNamespacer interface {
ImageStreamMappings(namespace string) ImageStreamMappingInterface
type ImageStreamImportsNamespacer interface {
ImageStreamImports(namespace string) ImageStreamImportInterface
}

type ImageStreamSecretsNamespacer interface {
Expand Down Expand Up @@ -92,10 +92,10 @@ type ImageStreamInterface interface {
Create(stream *imageapiv1.ImageStream) (*imageapiv1.ImageStream, error)
}

var _ ImageStreamMappingInterface = imageclientv1.ImageStreamMappingInterface(nil)
var _ ImageStreamImportInterface = imageclientv1.ImageStreamImportInterface(nil)

type ImageStreamMappingInterface interface {
Create(mapping *imageapiv1.ImageStreamMapping) (*imageapiv1.ImageStreamMapping, error)
type ImageStreamImportInterface interface {
Create(*imageapiv1.ImageStreamImport) (*imageapiv1.ImageStreamImport, error)
}

var _ ImageStreamTagInterface = imageclientv1.ImageStreamTagInterface(nil)
Expand Down
6 changes: 0 additions & 6 deletions pkg/dockerregistry/server/manifesthandler.go
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Expand Up @@ -14,12 +14,6 @@ import (

// A ManifestHandler defines a common set of operations on all versions of manifest schema.
type ManifestHandler interface {
// FillImageMetadata fills a given image with metadata parsed from manifest. It also corrects layer sizes
// with blob sizes. Newer Docker client versions don't set layer sizes in the manifest schema 1 at all.
// Origin master needs correct layer sizes for proper image quota support. That's why we need to fill the
// metadata in the registry.
FillImageMetadata(ctx context.Context, image *imageapiv1.Image) error

// Manifest returns a deserialized manifest object.
Manifest() distribution.Manifest

Expand Down
58 changes: 0 additions & 58 deletions pkg/dockerregistry/server/manifestschema1handler.go
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Expand Up @@ -11,11 +11,6 @@ import (
"github.com/docker/distribution/manifest/schema1"
"github.com/docker/distribution/reference"
"github.com/docker/libtrust"

"k8s.io/apimachinery/pkg/util/sets"

imageapi "github.com/openshift/origin/pkg/image/apis/image"
imageapiv1 "github.com/openshift/origin/pkg/image/apis/image/v1"
)

func unmarshalManifestSchema1(content []byte, signatures [][]byte) (distribution.Manifest, error) {
Expand Down Expand Up @@ -52,59 +47,6 @@ type manifestSchema1Handler struct {

var _ ManifestHandler = &manifestSchema1Handler{}

func (h *manifestSchema1Handler) FillImageMetadata(ctx context.Context, image *imageapiv1.Image) error {
signatures, err := h.manifest.Signatures()
if err != nil {
return err
}

for _, signDigest := range signatures {
image.DockerImageSignatures = append(image.DockerImageSignatures, signDigest)
}

refs := h.manifest.References()

if err := imageMetadataFromManifest(image); err != nil {
return fmt.Errorf("unable to fill image %s metadata: %v", image.Name, err)
}

blobSet := sets.NewString()
meta, ok := image.DockerImageMetadata.Object.(*imageapi.DockerImage)
if !ok {
return fmt.Errorf("image %q does not have metadata", image.Name)
}
meta.Size = int64(0)

blobs := h.repo.Blobs(ctx)
for i := range image.DockerImageLayers {
layer := &image.DockerImageLayers[i]
// DockerImageLayers represents h.manifest.Manifest.FSLayers in reversed order
desc, err := blobs.Stat(ctx, refs[len(image.DockerImageLayers)-i-1].Digest)
if err != nil {
context.GetLogger(ctx).Errorf("failed to stat blob %s of image %s", layer.Name, image.DockerImageReference)
return err
}
// The MediaType appeared in manifest schema v2. We need to fill it
// manually in the old images if it is not already filled.
if len(layer.MediaType) == 0 {
if len(desc.MediaType) > 0 {
layer.MediaType = desc.MediaType
} else {
layer.MediaType = schema1.MediaTypeManifestLayer
}
}
layer.LayerSize = desc.Size
// count empty layer just once (empty layer may actually have non-zero size)
if !blobSet.Has(layer.Name) {
meta.Size += desc.Size
blobSet.Insert(layer.Name)
}
}
image.DockerImageMetadata.Object = meta

return nil
}

func (h *manifestSchema1Handler) Manifest() distribution.Manifest {
return h.manifest
}
Expand Down
16 changes: 0 additions & 16 deletions pkg/dockerregistry/server/manifestschema2handler.go
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Expand Up @@ -8,8 +8,6 @@ import (
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/manifest/schema2"

imageapiv1 "github.com/openshift/origin/pkg/image/apis/image/v1"
)

var (
Expand All @@ -33,20 +31,6 @@ type manifestSchema2Handler struct {

var _ ManifestHandler = &manifestSchema2Handler{}

func (h *manifestSchema2Handler) FillImageMetadata(ctx context.Context, image *imageapiv1.Image) error {
// The manifest.Config references a configuration object for a container by its digest.
// It needs to be fetched in order to fill an image object metadata below.
configBytes, err := h.repo.Blobs(ctx).Get(ctx, h.manifest.Config.Digest)
if err != nil {
context.GetLogger(ctx).Errorf("failed to get image config %s: %v", h.manifest.Config.Digest.String(), err)
return err
}
image.DockerImageConfig = string(configBytes)

// We need to populate the image metadata using the manifest.
return imageMetadataFromManifest(image)
}

func (h *manifestSchema2Handler) Manifest() distribution.Manifest {
return h.manifest
}
Expand Down
110 changes: 10 additions & 100 deletions pkg/dockerregistry/server/manifestservice.go
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Expand Up @@ -2,23 +2,16 @@ package server

import (
"fmt"
"net/http"
"strings"
"sync"

"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/manifest/schema2"
"github.com/docker/distribution/registry/api/errcode"
regapi "github.com/docker/distribution/registry/api/v2"

kerrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

imageapi "github.com/openshift/origin/pkg/image/apis/image"
imageapiv1 "github.com/openshift/origin/pkg/image/apis/image/v1"
quotautil "github.com/openshift/origin/pkg/quota/util"
)

var _ distribution.ManifestService = &manifestService{}
Expand Down Expand Up @@ -47,38 +40,29 @@ func (m *manifestService) Exists(ctx context.Context, dgst digest.Digest) (bool,
func (m *manifestService) Get(ctx context.Context, dgst digest.Digest, options ...distribution.ManifestServiceOption) (distribution.Manifest, error) {
context.GetLogger(ctx).Debugf("(*manifestService).Get")

image, _, _, err := m.repo.getStoredImageOfImageStream(dgst)
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This moves the status of "source of truth" from etcd to registry's storage. Is that intentional?

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Yes, it fixes #9550.

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IMHO etcd should stay as a source of truth. Deleting an image using oc delete should prevent registry from serving it, which applies to deleting imagestreamtag or whole imagestream. Tagging the image into new image stream using oc tag should allow registry to serve it from the corresponding repository.

Moving the source of truth from etcd to storage implies a need for one-way synchronization of storage state to etcd. We don't have that in place yet.

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OK, you are right, this code has a bug. Image streams should be the source of truth for tagged manifests. Though, image streams don't contain information about untagged manifests and can't be used as a source of truth for them.

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Though, image streams don't contain information about untagged manifests and can't be used as a source of truth for them.

Well, we don't keep the history of image presence in image streams (something like untagged images). And I don't think it's desirable since image stream is already too fat.

The rejection to serve a manifest can be determined from the absence of image reference in the image stream.

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I don't want to get a rejection, I want to pull it back even if I don't tag it.

if err != nil {
return nil, err
}

ref := imageapi.DockerImageReference{
cacheName := imageapi.DockerImageReference{
Namespace: m.repo.namespace,
Name: m.repo.name,
Registry: m.repo.config.registryAddr,
}
if isImageManaged(image) {
// Reference without a registry part refers to repository containing locally managed images.
// Such an entry is retrieved, checked and set by blobDescriptorService operating only on local blobs.
ref.Registry = ""
} else {
// Repository with a registry points to remote repository. This is used by pullthrough middleware.
ref = ref.DockerClientDefaults().AsRepository()
}
}.Exact()

manifest, err := m.manifests.Get(withRepository(ctx, m.repo), dgst, options...)
switch err.(type) {
case distribution.ErrManifestUnknownRevision:
break
case nil:
m.repo.rememberLayersOfManifest(dgst, manifest, ref.Exact())
m.migrateManifest(withRepository(ctx, m.repo), image, dgst, manifest, true)
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You may still want to remove manifest and config from the image object.

m.repo.rememberLayersOfManifest(dgst, manifest, cacheName)
return manifest, nil
default:
context.GetLogger(m.ctx).Errorf("unable to get manifest from storage: %v", err)
return nil, err
}

image, _, _, err := m.repo.getStoredImageOfImageStream(dgst)
if err != nil {
return nil, err
}

if len(image.DockerImageManifest) == 0 {
// We don't have the manifest in the storage and we don't have the manifest
// inside the image so there is no point to continue.
Expand All @@ -88,7 +72,7 @@ func (m *manifestService) Get(ctx context.Context, dgst digest.Digest, options .
}
}

manifest, err = m.repo.manifestFromImageWithCachedLayers(image, ref.Exact())
manifest, err = m.repo.manifestFromImageWithCachedLayers(image, cacheName)
if err == nil {
m.migrateManifest(withRepository(ctx, m.repo), image, dgst, manifest, false)
}
Expand All @@ -104,7 +88,7 @@ func (m *manifestService) Put(ctx context.Context, manifest distribution.Manifes
if err != nil {
return "", regapi.ErrorCodeManifestInvalid.WithDetail(err)
}
mediaType, payload, canonical, err := mh.Payload()
mediaType, _, canonical, err := mh.Payload()
if err != nil {
return "", regapi.ErrorCodeManifestInvalid.WithDetail(err)
}
Expand All @@ -127,80 +111,6 @@ func (m *manifestService) Put(ctx context.Context, manifest distribution.Manifes
// Calculate digest
dgst := digest.FromBytes(canonical)

// Upload to openshift
ism := imageapiv1.ImageStreamMapping{
ObjectMeta: metav1.ObjectMeta{
Namespace: m.repo.namespace,
Name: m.repo.name,
},
Image: imageapiv1.Image{
ObjectMeta: metav1.ObjectMeta{
Name: dgst.String(),
Annotations: map[string]string{
imageapi.ManagedByOpenShiftAnnotation: "true",
},
},
DockerImageReference: fmt.Sprintf("%s/%s/%s@%s", m.repo.config.registryAddr, m.repo.namespace, m.repo.name, dgst.String()),
DockerImageManifest: string(payload),
DockerImageManifestMediaType: mediaType,
},
}

for _, option := range options {
if opt, ok := option.(distribution.WithTagOption); ok {
ism.Tag = opt.Tag
break
}
}

if err = mh.FillImageMetadata(ctx, &ism.Image); err != nil {
return "", err
}

// Remove the raw manifest as it's very big and this leads to a large memory consumption in etcd.
ism.Image.DockerImageManifest = ""
ism.Image.DockerImageConfig = ""

if _, err = m.repo.registryOSClient.ImageStreamMappings(m.repo.namespace).Create(&ism); err != nil {
// if the error was that the image stream wasn't found, try to auto provision it
statusErr, ok := err.(*kerrors.StatusError)
if !ok {
context.GetLogger(ctx).Errorf("error creating ImageStreamMapping: %s", err)
return "", err
}

if quotautil.IsErrorQuotaExceeded(statusErr) {
context.GetLogger(ctx).Errorf("denied creating ImageStreamMapping: %v", statusErr)
return "", distribution.ErrAccessDenied
}

status := statusErr.ErrStatus
kind := strings.ToLower(status.Details.Kind)
isValidKind := kind == "imagestream" /*pre-1.2*/ || kind == "imagestreams" /*1.2 to 1.6*/ || kind == "imagestreammappings" /*1.7+*/
if !isValidKind || status.Code != http.StatusNotFound || status.Details.Name != m.repo.name {
context.GetLogger(ctx).Errorf("error creating ImageStreamMapping: %s", err)
return "", err
}

if _, err := m.repo.createImageStream(ctx); err != nil {
if e, ok := err.(errcode.Error); ok && e.ErrorCode() == errcode.ErrorCodeUnknown {
// TODO: convert statusErr to distribution error
return "", statusErr
}
return "", err
}

// try to create the ISM again
if _, err := m.repo.registryOSClient.ImageStreamMappings(m.repo.namespace).Create(&ism); err != nil {
if quotautil.IsErrorQuotaExceeded(err) {
context.GetLogger(ctx).Errorf("denied a creation of ImageStreamMapping: %v", err)
return "", distribution.ErrAccessDenied
}
context.GetLogger(ctx).Errorf("error creating ImageStreamMapping: %s", err)
return "", err
}
}

return dgst, nil
}

Expand Down
2 changes: 2 additions & 0 deletions pkg/dockerregistry/server/manifestservice_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,8 @@ func TestManifestServiceExists(t *testing.T) {
}

func TestManifestServiceGetDoesntChangeDockerImageReference(t *testing.T) {
t.Skip("TODO")

namespace := "user"
repo := "app"
tag := "latest"
Expand Down
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