dhcp-host=${mac_address},set:vm_id_${vm_id},${host_ip},${hostname}
dhcp-option=tag:vm_id_${vm_id},encap:128,2,"${vm_id}.ign"
dhcp-option=tag:vm_id_${vm_id},encap:128,3,"/dev/disk/by-path/pci-0000:00:0a.0"