Docker Swarm that uses just nodes?

Question

If I create a Docker 1.12 Swarm(kit) with e.g. 1 manager and 2 nodes, Swarm will use all 3 hosts to spread containers onto.

I would like to prevent Swarm from using my manager hosts for creating containers. How?

Answer 1

To prevent Docker swarm from publishing containers to a node, you need to set its availability to pause or drain using :

docker node update --availability drain mynode

You can to this for all of your managers node