As part of the Docker Captains program, I was given a preview of Docker 1.12 including the new Swarm integration which is Docker’s native clustering/orchestration solution (also known as SwarmKit, but that’s really the repo/library name). And it’s certainly a big change. In this post I’ll try to highlight the changes and why they’re important.
The first and most obvious change is the move into Docker core; to start a Docker Swarm is now as simple as running dockerswarm init on the manager node and docker swarm join $IP:PORT on the worker nodes, where IP:PORT is the address of the leader. You can then use the top level node command to get more information on the swarm e.g:
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