+#if HA Proxy is requested the last devstack node will be configured as haproxy
+if [ "${ENABLE_HAPROXY_FOR_NEUTRON}" == "yes" ]; then
+ echo "NUM_OPENSTACK_SYSTEM=$(( ${#OPENSTACK_SYSTEM[@]} - 1 ))" >> slave_addresses.txt
+else
+ echo "NUM_OPENSTACK_SYSTEM=${#OPENSTACK_SYSTEM[@]}" >> slave_addresses.txt
+fi