Install Updates
sudo apt-get -y update && sudo apt-get -y upgrade
Add Docker key
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
Add Docker to apt sources
echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" | sudo tee /etc/apt/sources.list.d/docker.list
Install Docker
sudo apt-get install docker-engine
Allow Docker to be used by non-root users
sudo usermod -aG docker ubuntu
Setup Docker to run via TCP as well as standard socket
echo 'DOCKER_OPTS="-H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock"' | sudo tee --append /etc/default/docker
sudo service docker restart
Start a swarm agent
docker run -d swarm join --addr=$(curl http://169.254.169.254/latest/meta-data/local-ipv4):2375 token://$SWARM_TOKEN
If this is the management host, start the manager
docker run -d -p 3375:2375 swarm manage token://$SWARM_TOKEN