function configure_dns_extension {
    neutron_ml2_extension_driver_add "subnet_dns_publish_fixed_ip"
}
function configure_dns_integration {
    iniset $NEUTRON_CONF DEFAULT external_dns_driver designate

    # Use new /dns based uri by default if no port is set.
    if [[ -z "$DESIGNATE_SERVICE_PORT" ]]; then
        iniset $NEUTRON_CONF designate url "$DESIGNATE_SERVICE_PROTOCOL://$DESIGNATE_SERVICE_HOST/dns/v2"
    else
        iniset $NEUTRON_CONF designate url "$DESIGNATE_SERVICE_PROTOCOL://$DESIGNATE_SERVICE_HOST:$DESIGNATE_SERVICE_PORT/v2"
    fi

    configure_keystone_authtoken_middleware $NEUTRON_CONF designate designate
}
function post_config_dns_extension {
    iniset $NEUTRON_CONF DEFAULT dns_domain openstackgate.local
}