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cmd/dist, cmd/ctr: move image store access to GRPC

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With this changeset, image store access is now moved to completely
accessible over GRPC. No clients manipulate the image store database
directly and the GRPC client is fully featured. The metadata database is
now managed by the daemon and access coordinated via services.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day
2017-04-03 18:40:59 -07:00
parent 1ea809dc2a
commit 8c74da3983
10 changed files with 69 additions and 98 deletions
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32
cmd/dist/common.go vendored
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@@ -6,11 +6,12 @@ import (
"path/filepath"
"time"
"github.com/boltdb/bolt"
imagesapi "github.com/containerd/containerd/api/services/images"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/remotes"
"github.com/containerd/containerd/remotes/docker"
imagesservice "github.com/containerd/containerd/services/images"
"github.com/urfave/cli"
"google.golang.org/grpc"
)
@@ -27,6 +28,14 @@ func resolveContentStore(context *cli.Context) (*content.Store, error) {
return content.NewStore(root)
}
func resolveImageStore(clicontext *cli.Context) (images.Store, error) {
conn, err := connectGRPC(clicontext)
if err != nil {
return nil, err
}
return imagesservice.NewStoreFromClient(imagesapi.NewImagesClient(conn)), nil
}
func connectGRPC(context *cli.Context) (*grpc.ClientConn, error) {
socket := context.GlobalString("socket")
timeout := context.GlobalDuration("connect-timeout")
@@ -40,27 +49,6 @@ func connectGRPC(context *cli.Context) (*grpc.ClientConn, error) {
)
}
func getDB(ctx *cli.Context, readonly bool) (*bolt.DB, error) {
// TODO(stevvooe): For now, we operate directly on the database. We will
// replace this with a GRPC service when the details are more concrete.
path := filepath.Join(ctx.GlobalString("root"), "meta.db")
db, err := bolt.Open(path, 0644, &bolt.Options{
ReadOnly: readonly,
})
if err != nil {
return nil, err
}
if !readonly {
if err := images.InitDB(db); err != nil {
return nil, err
}
}
return db, nil
}
// getResolver prepares the resolver from the environment and options.
func getResolver(ctx context.Context) (remotes.Resolver, error) {
return docker.NewResolver(), nil