In Dockerized openQA (current stable, 4.2-1.2) there is a bug, where if you specify HDDMODEL to be scsi, it fails to connect CD-ROM to it. Workaround is to set CDMODEL=scsi-cd when HDDMODEL is scsi.
HDDMODEL
CDMODEL=scsi-cd
This ticket had assigned some Differential requests: D642
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/quality/os-autoinst-distri-fedora/issues/25
Please continue any further discussion there.