#23542 added support for network aliasing of services. Comment 2 in moby/libnetwork#1263 shows this feature in action, by providing the --network-alias option to docker service create. However, for all clients I checked, this just returns the error unknown flag: --network-alias. This also applies for docker service update (flags should probably be --network-alias-add and --network-alias-rm here).

Clients tested were:

• the one from the Docker-provided testing repo for CentOS (https://yum.dockerproject.org/repo/testing/centos/7/Packages/docker-engine-1.12.0-0.4.rc4.el7.centos.x86_64.rpm)
• the latest experimental build (https://experimental.docker.com/builds/Linux/x86_64/docker-latest.tgz - downloaded today)
• the binaries built from master (https://master.dockerproject.org/linux/amd64/docker-1.12.0-dev - downloaded today)