Install Docker

install-docker.sh

#!/bin/bash

set -e
set -x

# Install Docker package

apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
sh -c 'echo deb https://get.docker.io/ubuntu docker main >/etc/apt/sources.list.d/docker.list'
apt-get -y update
apt-get -y install linux-image-extra-$(uname -r)
apt-get -y install lxc-docker

# Give Docker lots of space
echo 'DOCKER_OPTS="-g /mnt/docker"' >/etc/default/docker
service docker restart

# Let `ubuntu` run Docker commands
adduser ubuntu docker