
#!/bin/bash
mkdir -p /mnt/cdrom
mount /dev/sr0 /mnt/cdrom

# In Pike, Nova no longer writes net config to 0000
CONTENT_PATH=/mnt/cdrom/openstack/content
IP_FILE=0000
[ "$(head -n1 ${CONTENT_PATH}/0000)" == "# Injected by Nova on instance boot" ] && IP_FILE=0001
PUBLIC_IP=$(cat ${CONTENT_PATH}/${IP_FILE})

umount /dev/sr0

until [ "$(/usr/bin/docker network inspect --format '{{ .Name }}' bridge)" == "bridge" ]; do
    echo "waiting for docker bridge..."
    sleep 0.1
done
DOCKER_NETWORK=$(ip -f inet -o addr show docker0 scope global | cut -d\  -f 7)
set -x
iptables -t nat -D POSTROUTING -s ${DOCKER_NETWORK} ! -o docker0 -j SNAT --to ${PUBLIC_IP}
iptables -t nat -I POSTROUTING -s ${DOCKER_NETWORK} ! -o docker0 -j SNAT --to ${PUBLIC_IP}