buildkite docker build EC2 instance setup

buildkite-build-bootstrap.sh

#!/usr/bin/env bash
exec > >(tee /var/log/prepare-instance.log|logger -t prepare-instance -s 2>/dev/console) 2>&1

set -e

AZ=$(curl --show-error --silent http://169.254.169.254/latest/meta-data/placement/availability-zone)
ID=$(curl --show-error --silent http://169.254.169.254/latest/meta-data/instance-id)
REGION=$(printf "%s" "$AZ" | sed 's/.$//')

set_instance_health() {
  echo "Prepare script failed. Marking instance unhealthy."
  aws autoscaling set-instance-health \
    --instance-id "$ID" \
    --health-status "$1" \
    --no-should-respect-grace-period \
    --region "$REGION"
}
trap '[ $? -ne 0 ] && set_instance_health Unhealthy' EXIT

EBS_VOLUME_NAME=buildkite-docker-ebs

aws ec2 wait \
  --region "$REGION" \
  volume-available \
  --filters "Name=tag:Name,Values=$EBS_VOLUME_NAME" \
            Name=status,Values=available \
            "Name=availability-zone,Values=$AZ"

fetch_ebs_volume_id() {
  aws ec2 describe-volumes \
    --filters "Name=tag:Name,Values=$EBS_VOLUME_NAME" \
              Name=status,Values=available \
              "Name=availability-zone,Values=$AZ" \
    --region "$REGION" | jq -r '.Volumes[0].VolumeId'
}

EBS_VOLUME_ID=$(fetch_ebs_volume_id)

aws ec2 attach-volume \
  --device /dev/sdf \
  --instance-id "$ID" \
  --region "$REGION" \
  --volume-id "$EBS_VOLUME_ID"

echo "Update packages"
sudo yum update --assumeyes

aws ec2 wait \
  --region "$REGION" \
  volume-in-use \
  --filters "Name=attachment.instance-id,Values=$ID" \
            Name=attachment.status,Values=attached \
            Name=status,Values=in-use \
  --volume-ids "$EBS_VOLUME_ID"

sudo service docker stop
sudo mount /dev/xvdf /var/lib/docker

cat <<EOM > /etc/sysconfig/docker
# We use the overlay2 storage driver for performance
OPTIONS="-s overlay2 --debug --registry-mirror=https://ci-registry.codeclimate.net"

DAEMON_MAXFILES=4096
DAEMON_PIDFILE_TIMEOUT=30

# Force native resolver to work around https://github.com/docker/docker/issues/22673
export GODEBUG=netdns=cgo
EOM

sudo initctl reload-configuration
sudo service docker start