jlhawn answer is about Docker Swarm Mode while your link is for Docker Swarm. Docker Swarm Mode has been released with Docker 1.12 and I guess will replace the

jlhawn answer is about Docker Swarm Mode while your link is for Docker Swarm. Docker Swarm Mode has been released with Docker 1.12 and I guess will replace the old Docker Swarm. The new Docker Swarm Mode doesnt need any 3rd party to keep the state because it has a Raft based consensus feature built-in. Thus it is really easy now to use the new swarm mode.