Setting up a cluster

We’ll create a similar environment as we did in the previous chapter. We'll have three nodes which will form a Swarm cluster.

All the commands from this chapter are available in the 03-networking.sh (https://gist.github.com/vfarcic/fd7d7e04e1133fc3c90084c4c1a919fe) Gist.

By this time, you already know how to set up a cluster so we'll skip the explanation and just do it:

for i in123; do
  docker-machine create -d virtualbox node-$i
done

eval $(docker-machine env node-1)

docker swarm init \
  --advertise-addr $(docker-machine ip node-1)

TOKEN=$(docker swarm join-token -q worker)

for i in23; do
eval $(docker-machine env node-$i)

  docker swarm join \
    --token $TOKEN \
    --advertise-addr $(docker-machine ip node-$i) \
    $(docker-machine ip node-1):2377
done

eval $(docker-machine env node-1)

docker node ls

The output of the last command node ls is as follows (IDs were removed for brevity):

HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
node-2    Ready   Active
node...