#!/usr/bin/env bash
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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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# We are mounting /var/lib/docker and /tmp as tmpfs in order
# to gain speed when building the images The docker storage
# is ephemeral anyway and will be removed when instance stops

sudo service docker stop || true

sudo mount -t tmpfs -o size=3% tmpfs /tmp
sudo mount -t tmpfs -o size=85% tmpfs /var/lib/docker

sudo service docker start

# This instance will run for maximum 40 minutes and
# It will terminate itself after that (it can also
# be terminated immediately when the job finishes)
echo "sudo shutdown -h now" | at now +40 min