feat(compose): add InspectRemoteImage api endpoint to inspect images in registry

This commit is contained in:
Pavel Sviderski
2025-03-26 20:37:53 +10:00
parent ffef41081b
commit c42968c812
5 changed files with 193 additions and 64 deletions
+1
View File
@@ -4,6 +4,7 @@
# Allow files and directories.
!cmd/
!internal/
!pkg/
!scripts/docker/
!go.*
+63 -52
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@@ -923,8 +923,10 @@ type RemoteImage struct {
unknownFields protoimpl.UnknownFields
Metadata *Metadata `protobuf:"bytes,1,opt,name=metadata,proto3" json:"metadata,omitempty"`
// Raw manifest data (JSON).
Manifest []byte `protobuf:"bytes,2,opt,name=manifest,proto3" json:"manifest,omitempty"`
// Image reference in the canonical form with the digest.
Reference string `protobuf:"bytes,2,opt,name=reference,proto3" json:"reference,omitempty"`
// Raw JSON manifest from the registry.
Manifest []byte `protobuf:"bytes,3,opt,name=manifest,proto3" json:"manifest,omitempty"`
}
func (x *RemoteImage) Reset() {
@@ -966,6 +968,13 @@ func (x *RemoteImage) GetMetadata() *Metadata {
return nil
}
func (x *RemoteImage) GetReference() string {
if x != nil {
return x.Reference
}
return ""
}
func (x *RemoteImage) GetManifest() []byte {
if x != nil {
return x.Manifest
@@ -1055,58 +1064,60 @@ var file_internal_machine_api_pb_docker_proto_rawDesc = []byte{
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}
var (
+4 -2
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@@ -118,6 +118,8 @@ message InspectRemoteImageResponse {
message RemoteImage {
Metadata metadata = 1;
// Raw manifest data (JSON).
bytes manifest = 2;
// Image reference in the canonical form with the digest.
string reference = 2;
// Raw JSON manifest from the registry.
bytes manifest = 3;
}
+80 -9
View File
@@ -3,14 +3,18 @@ package docker
import (
"context"
"encoding/json"
"errors"
"fmt"
"github.com/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/pkg/jsonmessage"
regtypes "github.com/google/go-containerregistry/pkg/v1/types"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/psviderski/uncloud/internal/machine/api/pb"
"github.com/psviderski/uncloud/pkg/api"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
@@ -228,13 +232,8 @@ func (c *Client) PullImage(ctx context.Context, image string) (<-chan PullImageM
return ch, nil
}
type MachineImage struct {
Metadata *pb.Metadata
Image types.ImageInspect
}
// ImageInspect returns the image information for the given image ID.
func (c *Client) ImageInspect(ctx context.Context, id string) ([]MachineImage, error) {
// InspectImage returns the image information for the given image ID. The request may be sent to multiple machines.
func (c *Client) InspectImage(ctx context.Context, id string) ([]api.MachineImage, error) {
resp, err := c.grpcClient.InspectImage(ctx, &pb.InspectImageRequest{Id: id})
if err != nil {
// If the request was sent to only one machine, err is an actual error from the machine.
@@ -246,7 +245,7 @@ func (c *Client) ImageInspect(ctx context.Context, id string) ([]MachineImage, e
notFoundCount := 0
for _, msg := range resp.Messages {
if msg.Metadata != nil && codes.Code(msg.Metadata.Status.Code) == codes.NotFound {
if msg.Metadata != nil && msg.Metadata.Status != nil && codes.Code(msg.Metadata.Status.Code) == codes.NotFound {
notFoundCount++
}
}
@@ -254,7 +253,7 @@ func (c *Client) ImageInspect(ctx context.Context, id string) ([]MachineImage, e
return nil, errdefs.NotFound(fmt.Errorf("image not found: %s", id))
}
images := make([]MachineImage, len(resp.Messages))
images := make([]api.MachineImage, len(resp.Messages))
for i, msg := range resp.Messages {
images[i].Metadata = msg.Metadata
if msg.Metadata != nil && msg.Metadata.Error != "" {
@@ -268,3 +267,75 @@ func (c *Client) ImageInspect(ctx context.Context, id string) ([]MachineImage, e
return images, nil
}
// InspectRemoteImage returns the image metadata for an image in a remote registry using the machine's Docker auth
// credentials if necessary. If the response from a machine doesn't contain an error, the api.RemoteImage will either
// contain an IndexManifest or an ImageManifest.
func (c *Client) InspectRemoteImage(ctx context.Context, id string) ([]api.MachineRemoteImage, error) {
resp, err := c.grpcClient.InspectRemoteImage(ctx, &pb.InspectRemoteImageRequest{Id: id})
if err != nil {
return nil, err
}
images := make([]api.MachineRemoteImage, 0, len(resp.Messages))
var parseErr error
for _, msg := range resp.Messages {
mri, err := parseRemoteImageMessage(msg)
if err != nil {
parseErr = errors.Join(parseErr, err)
continue
}
images = append(images, mri)
}
return images, parseErr
}
type manifestMediaType struct {
MediaType regtypes.MediaType `json:"mediaType"`
}
func parseRemoteImageMessage(msg *pb.RemoteImage) (api.MachineRemoteImage, error) {
mri := api.MachineRemoteImage{
Metadata: msg.Metadata,
}
if msg.Metadata != nil && msg.Metadata.Error != "" {
return mri, nil
}
ref, err := reference.ParseNormalizedNamed(msg.Reference)
if err != nil {
// The reference is the string representation of a valid canonical reference from the server which
// is expected to be parseable.
return mri, fmt.Errorf("parse reference: %w", err)
}
if canonicalRef, ok := ref.(reference.Canonical); ok {
mri.Image.Reference = canonicalRef
} else {
return mri, fmt.Errorf("unexpected non-canonical image reference: %s", msg.Reference)
}
manifest := manifestMediaType{}
if err = json.Unmarshal(msg.Manifest, &manifest); err != nil {
return mri, fmt.Errorf("unmarshal manifest: %w", err)
}
switch {
case manifest.MediaType.IsIndex():
index := &ocispec.Index{}
if err = json.Unmarshal(msg.Manifest, index); err != nil {
return mri, fmt.Errorf("unmarshal index manifest: %w", err)
}
mri.Image.IndexManifest = index
case manifest.MediaType.IsImage():
image := &ocispec.Manifest{}
if err = json.Unmarshal(msg.Manifest, image); err != nil {
return mri, fmt.Errorf("unmarshal image manifest: %w", err)
}
mri.Image.ImageManifest = image
default:
return mri, fmt.Errorf("unexpected manifest media type: %s", manifest.MediaType)
}
return mri, nil
}
+45 -1
View File
@@ -4,19 +4,24 @@ import (
"context"
"encoding/json"
"errors"
"github.com/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/image"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/client"
"github.com/google/go-containerregistry/pkg/authn"
"github.com/google/go-containerregistry/pkg/name"
"github.com/google/go-containerregistry/pkg/v1/remote"
"github.com/opencontainers/go-digest"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/psviderski/uncloud/internal/machine/api/pb"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/types/known/emptypb"
"io"
"github.com/psviderski/uncloud/internal/machine/api/pb"
)
// Server implements the gRPC Docker service that proxies requests to the Docker daemon.
@@ -267,3 +272,42 @@ func (s *Server) InspectImage(ctx context.Context, req *pb.InspectImageRequest)
},
}, nil
}
// InspectRemoteImage returns the image metadata for an image in a remote registry using the machine's Docker auth
// credentials if necessary.
func (s *Server) InspectRemoteImage(
_ context.Context, req *pb.InspectRemoteImageRequest,
) (*pb.InspectRemoteImageResponse, error) {
ref, err := name.ParseReference(req.Id)
if err != nil {
return nil, status.Errorf(codes.InvalidArgument, "parse image: %v", err)
}
desc, err := remote.Get(ref, remote.WithAuthFromKeychain(authn.DefaultKeychain))
if err != nil {
return nil, status.Errorf(codes.Internal, "fetch image manifest: %v", err)
}
namedRef, err := reference.ParseNormalizedNamed(ref.String())
if err != nil {
return nil, status.Errorf(codes.InvalidArgument, "parse image: %v", err)
}
var canonicalRef reference.Canonical
if _, ok := namedRef.(reference.Canonical); ok {
canonicalRef = namedRef.(reference.Canonical)
} else {
if canonicalRef, err = reference.WithDigest(namedRef, digest.Digest(desc.Digest.String())); err != nil {
return nil, status.Errorf(codes.Internal, "add digest to image: %v", err)
}
}
return &pb.InspectRemoteImageResponse{
Messages: []*pb.RemoteImage{
{
Reference: reference.FamiliarString(canonicalRef),
Manifest: desc.Manifest,
},
},
}, nil
}