Using Docker Engine to Create a Swarm

Before we create our swarm, let's get a quick overview of the docker-machine cli. Typing docker-machine on your terminal should give you this output:

Just below that, we have our list of commands:

Note

Remember to always use the help option when you need to clarify something, that is, docker-machine stop --help

To create our first Docker Swarm cluster, we are going to use docker-machine to create our manager and worker nodes first.

Before creating the first machine, a quick overview of our objectives gives us the following: we are going to have four docker-machines, one manager, and three workers; they are all running on VirtualBox, thus there are four virtual machines.

Creating Docker Machines

This command is used to create a new virtual Docker host:

docker-machine create --driver <driver> <machine_name>

This means our Docker host will be running on VirtualBox, but managed and controlled by docker-machine. The --driver option specifies the...