Docker Swarm

Swarm mode is an advanced feature for managing a cluster of Docker daemons.

I don't have a ton of experience with Docker Swarm currently so I'm really just going to give some of the basic commands and I highly recommend you look at the documentation for any further questions: https://docs.docker.com/engine/swarm/

To create a swarm cluster you can run: docker swarm init. This command will give you instructions to connect other nodes to this cluster. By default the node that you init a cluster on will be promoted to a manager node.

Deployment to a swarm cluster are detailed in a stack file: https://docs.docker.com/guides/swarm-deploy/#describe-apps-using-stack-files

To deploy a stack file to your cluster you can run: docker stack deploy -c <stackfile> <application_name>.

To see running services in a swarm cluster you can run: docker service ls.

To take down a deployment stack you can run: docker stack rm <application_name>.

To remove a node from a cluster you can run: docker swarm leave. If the node is a manger node you will have to append --force to the leave command. If the node is the last node in the cluster leaving the swarm will also delete the cluster.