Setup a Docker Swarm multi-host cluster on DigitalOcean

create-multi-host-swarm-digitalocean.sh

docker-machine create \
  --driver=digitalocean \
  --digitalocean-access-token=$DO_TOKEN \
  --digitalocean-size=512mb \
  --digitalocean-region=tor1 \
  --digitalocean-private-networking=true \
  --digitalocean-image=ubuntu-16-04-x64 \
    docker-swarm-kv-store

docker $(docker-machine config docker-swarm-kv-store) run -d \
  --net=host progrium/consul --server -bootstrap-expect 1

kvip=$(docker-machine ip docker-swarm-kv-store)

docker-machine create \
  --driver=digitalocean \
  --digitalocean-access-token=$DO_TOKEN \
  --digitalocean-size=1gb \
  --digitalocean-region=tor1 \
  --digitalocean-private-networking=true \
  --digitalocean-image=ubuntu-16-04-x64 \
  --swarm \
  --swarm-master \
  --swarm-discovery consul://${kvip}:8500 \
  --engine-opt "cluster-store consul://${kvip}:8500" \
  --engine-opt "cluster-advertise eth1:2376" \
    docker-swarm-master

docker-machine create \
  --driver=digitalocean \
  --digitalocean-access-token=$DO_TOKEN \
  --digitalocean-size=1gb \
  --digitalocean-region=tor1 \
  --digitalocean-private-networking=true \
  --digitalocean-image=ubuntu-16-04-x64 \
  --swarm \
  --swarm-discovery consul://${kvip}:8500 \
  --engine-opt "cluster-store consul://${kvip}:8500" \
  --engine-opt "cluster-advertise eth1:2376" \
    docker-swarm-agent-1

eval $(docker-machine env --swarm docker-swarm-master)
docker info