enable grpc gateway for http-only queries

Author: thecubed

pkg/manager/server.go

@@ -237,6 +237,7 @@ func (s *server) startEtcd(ctx context.Context, state string, peers []*Peer) err
 	cfg.InitialCluster = initialClusterStringFromPeers(peers)
 	cfg.StrictReconfigCheck = true
 	cfg.ServiceRegister = s.cfg.ServiceRegister
+	cfg.EnableGRPCGateway = true
 
 	// XXX(chris): not sure about this
 	clientv3.SetLogger(grpclog.NewLoggerV2(ioutil.Discard, ioutil.Discard, ioutil.Discard))