Docker swarm scale

Question

I have a cluster built with docker-swarm in which we run apache spark apps. In the cluster, I have a manager node and 3 worker nodes.I am scaling the number of worker nodes by using following command.

sudo docker service scale spark_worker=<number of workers>

When I increase the number of worker, I want to create new containers on worker node not on manager node.

Answer 1

try docker node update --availability=drain <nodename> this will stop containers on the node and start them somewhere else, and prevent future containers from running on that node.

But this has a lot of limitations. If there's a better solution please post it.