new service: version

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

services/version/service.go

@@ -0,0 +1,38 @@
+package version
+
+import (
+	api "github.com/containerd/containerd/api/services/version"
+	"github.com/containerd/containerd/plugin"
+	ctrdversion "github.com/containerd/containerd/version"
+	empty "github.com/golang/protobuf/ptypes/empty"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+)
+
+var _ api.VersionServer = &Service{}
+
+func init() {
+	plugin.Register("version-grpc", &plugin.Registration{
+		Type: plugin.GRPCPlugin,
+		Init: New,
+	})
+}
+
+func New(ic *plugin.InitContext) (interface{}, error) {
+	return &Service{}, nil
+}
+
+type Service struct {
+}
+
+func (s *Service) Register(server *grpc.Server) error {
+	api.RegisterVersionServer(server, s)
+	return nil
+}
+
+func (s *Service) Version(ctx context.Context, _ *empty.Empty) (*api.VersionResponse, error) {
+	return &api.VersionResponse{
+		Version:  ctrdversion.Version,
+		Revision: ctrdversion.Revision,
+	}, nil
+}