docker-swarm.sh

#!/bin/bash

echo "--> create VMs..."
for i in 1 2 3; do
    docker-machine create -d virtualbox node-$i
done

echo "--> initialize swarm master..."
eval $(docker-machine env node-1)
docker swarm init \
    --advertise-addr $(docker-machine ip node-1)

echo "--> add other two nodes to the cluster..."
docker swarm join-token -q manager
TOKEN=$(docker swarm join-token -q worker)
for i in 2 3; 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

echo "--> make master the active machine again..."
eval $(docker-machine env node-1)

echo "--> create overlay network..."
docker network create --driver overlay demo-net

echo "--> show stuff..."
docker node ls
docker network ls
docker service ls

# cleanup
#docker-machine rm -f node-1 node-2 node-3