set -x

# Update APT and ensure our required packages are installed
apt-get -y update
apt-get -y install lxc bridge-utils debootstrap yum iptables ntpdate ntp apt-cacher-ng

# Ensure APT Cache-NG is running
service apt-cacher-ng restart || service apt-cacher-ng start
cat <<EOF | tee /etc/apt/apt.conf.d/02proxy
Acquire::http { Proxy "http://127.0.0.1:3142"; };
EOF

# Ensure the default lxc networking services are off
service lxc-net stop

# Ensure that we use APT Cacher-NG for building containers
grep "^MIRROR" /etc/default/lxc || echo "MIRROR=\"http://127.0.0.1:3142/archive.ubuntu.com/ubuntu\"" | tee -a /etc/default/lxc
service lxc restart || service lxc start

# Ensure NTP services are enabled and running
service ntp restart || service ntp start

# Enable ipv4 forwarding
sysctl net.ipv4.ip_forward | grep "net.ipv4.ip_forward = 1" || sysctl -w net.ipv4.ip_forward=1

# Install an iptable NAT rule
iptables -t nat --list -v | grep "MASQUERADE  all  --  any    eth0    anywhere             anywhere" || iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE