virt-install with pool off glusterfs

Hi Guys, what can, is, wrong with that syntax of mine below? $ virt-install -n fcoskubermaster1 --virt-type kvm --os-variant fedora31 --graphics="none" --memory $((4*1024)) --disk="pool=gluster-VMs,size=10,path=/fcoskubermaster1.qcow2,backing_store=gluster://127.0.0.1/VMs/00-BACKing/fcoskubermast

proper config for qemu's host_cdrom

Greetings, I was wondering what is the proper way to configure a scsi cdrom pass-through so in when the qemu line is generated, host_Cdrom will be used instead of host_device. looking at https://gitlab.com/libvirt/libvirt/-/blob/master/src/qemu/qemu_block.c#L1090, I see that hostcdrom must be