Provision Docker Swarm on Digital Ocean

provision.sh

#!/bin/bash
set -e

# Must fill these values out for the script to work
droplet_name=""
digitalocean_access_token=""

# For more info check out:
# Dockers Machine Digital Ocean Driver: https://docs.docker.com/machine/drivers/digital-ocean/#options
# Docker Swarm: https://docs.docker.com/engine/swarm/

# Create droplet
docker-machine create \
  --driver digitalocean \
  --digitalocean-access-token $digitalocean_access_token \
  --digitalocean-region sfo1 \
  --digitalocean-size 1gb \
  $droplet_name

# Add local SSH key to remote authorized_keys (optional)
cat ~/.ssh/id_rsa.pub | (docker-machine ssh $droplet_name "cat >> ~/.ssh/authorized_keys")
docker-machine ssh $droplet_name "cat ~/.ssh/authorized_keys"

# Initialize Swarm
ip=$(docker-machine ip $droplet_name)
docker-machine ssh $droplet_name "docker swarm init --advertise-addr $ip"

# Register Swarm to Docker Cloud
docker-machine ssh $droplet_name "docker run -i --rm -v /var/run/docker.sock:/var/run/docker.sock dockercloud/registration"