First, we created a cluster template named swarm2k for DigitalOcean with the following command:

$ belt cluster new --driver digitalocean swarm2k

The preceding command creates a configuration template file in the current directory called .belt/swarm2k/config.yml. This was our starting point to define other attributes.

We checked if our cluster was defined by running the following command:

$ belt cluster ls
CLUSTER       ACTIVE    LEADER    MASTERS    #NODES
swarm2k       -         -         -          0 / 0

With the use command, we can switch and used the available swarm2k clusters, as follows:

$ belt use swarm2k
swarm2k

At this point, we refined the swarm2k template's attributes.

By setting  the DigitalOcean's instance region to be sgp1 by issuing the following command:

$ belt cluster update region=sgp1

Belt required to define all necessary values with this command. Here's a list of the required template keys for the DigitalOcean driver that we specified...