build-image

#!/bin/sh

# Exit on failure
set -e

# Exit on unassigned variable use
set -u

# Switch working directory
cd $(dirname $0)

# Avoid locale issues
export LC_ALL=C

# dpkg shouldn't ask questions
export DEBIAN_FRONTEND=noninteractive

# Configure main repository
cat >/etc/apt/sources.list <<EOF
deb http://archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
EOF

# Update packages list
apt-get update

# Install SSH server
apt-get install -y --no-install-recommends \
	openssh-server

# just for cosmetics, fix "not-found" entries while using "systemctl --all"
for MATCH in \
	auditd.service \
	; do
		grep -rn --binary-files=without-match ${MATCH} /lib/systemd/ | cut -d: -f1 | xargs sed -ri 's/(.*=.*)'${MATCH}'(.*)/\1\2/'
done

# Install cloud-init systemd service
cp -vf cloud-init /usr/sbin/
cp -vf cloud-init.service /lib/systemd/system/
systemctl enable cloud-init.service

# Clean rootfs
cd /
rm -rf /tmp/* /var/tmp/*