Setting up a Swarm cluster with Docker Machine and DigitalOcean API

We'll continue using the vfarcic/cloud-provisioning (https://github.com/vfarcic/cloud-provisioning) repository. It contains configurations and scripts that'll help us out. You already have it cloned. To be on the safe side, we'll pull the latest version:

cd cloud-provisioning

git pull

Let's create the first droplet:

docker-machine create \
    --driver digitalocean  \
    --digitalocean-size 1gb  \
    --digitalocean-private-networking \  
    swarm-1

We specified that the Docker Machine should use the digitalocean driver to create an instance in the region we defined as the environment variable DIGITALOCEAN_REGION. The size of the droplet is 1 GB and it has private networking enabled.

Docker Machine launched a DigitalOcean droplet, provisioned it with Ubuntu, and installed and configured Docker Engine.

As you no doubt...