Deployment with Docker

Setting up a Docker Swarm cluster

Since all the functionality to set up a Docker Swarm cluster is already included in the Docker installation, this is actually a really easy thing to do. Let's see what commands we have available to us:

$ docker swarm<snip>Commands:  init        Initialize a swarm  join        Join a swarm as a node and/or manager  join-token  Manage join tokens  leave       Leave the swarm  unlock      Unlock swarm  unlock-key  Manage the unlock key  update      Update the swarm

A few things to note here--some more apparent than others:

• You create a swarm with docker swarm init
• You join a cluster with docker swarm join and the machine can be a worker node, a manager node, or both
• Authentication is managed using tokens (unique strings that need to match)
• If something ...