Little script for me to pipe over SSH to a fresh Ubuntu VPS/VM to get it running a docker agent (used with cloudatcost.com as cheap build boxes)

docker-buildkite-ubuntu-14.04.sh

#!/usr/bin/env bash

if [ -z "$BUILDKITE_AGENT_TOKEN" ]; then
  echo
  >&2 echo "No buildkite agent token set! Set BUILDKITE_AGENT_TOKEN"
  exit 1
fi

touch ~/.ssh/authorized_keys
chmod 700 ~/.ssh
chmod 644 ~/.ssh/authorized_keys

apt-get -qq -y update
apt-get -qq -y install apt-transport-https ca-certificates
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" > /etc/apt/sources.list.d/docker.list
apt-get -qq -y update
apt-get -qq -y purge lxc-docker
apt-get -qq -y install linux-image-extra-`uname -r` apparmor
apt-get -qq -y install docker-engine
service docker start

DOCKER_VERSION="`docker version | awk '/Version:/ { if(lastLine == "Server:") { print $2 } } { lastLine = $1 }'`"

docker run -d --restart=always --name buildkite-agent \
	-v /var/run/docker.sock:/var/run/docker.sock \
	-e BUILDKITE_AGENT_TOKEN="$BUILDKITE_AGENT_TOKEN" \
	-e BUILDKITE_AGENT_NAME="ubuntu-%n" \
	-e BUILDKITE_AGENT_PRIORITY=10 \
	-e BUILDKITE_AGENT_META_DATA="docker=$DOCKER_VERSION" \
	buildkite/agent

DOCKER_GC_CMD="docker run --name=docker-gc --rm -v /var/run/docker.sock:/var/run/docker.sock -v /etc:/etc -e FORCE_IMAGE_REMOVAL=1 -e FORCE_CONTAINER_REMOVAL=1 -e GRACE_PERIOD_SECONDS=7200 spotify/docker-gc"
echo "0 * * * * root $DOCKER_GC_CMD" > /etc/cron.d/docker-gc