Pearl1594 opened a new issue, #14321: URL: https://github.com/apache/cloudstack/issues/14321
### problem Multi-CD-ROM support makes the KVM agent pre-allocate several CD-ROM drives at the device seqs starting at CDROM_PRIMARY_DEVICE_SEQ. VolumeApiServiceImpl.getDeviceId() and the unmanaged-VM import still reserve only the primary CD-ROM seq, from the single-CD-ROM layout. A data disk can therefore be assigned the same device seq as one of the additional CD-ROM slots. When both devices get the same sd* label (a SATA CD-ROM on UEFI VMs plus SATA/SCSI data disks), the domain XML ends up with two devices on one target. The CD-ROM count is not fixed and there is no per-VM limit on it, so any slot beyond the primary one can conflict. ``` ... <target dev='sdc' bus='scsi'/> <serial>d92a661ed0934cd587b8</serial> </disk> <disk device='cdrom' type='file'> <driver name='qemu' type='raw' /> <source file=''/> <target dev='sdd' bus='sata'/> </disk> <disk device='disk' type='file'> <driver name='qemu' type='qcow2' cache='none' discard='unmap' /> <source file='/mnt/f53286ae-f882-3b10-9142-0992be9ce77d/3f1b719d-d9d4-49dd-b2a9-b3c01e0c695c'/> <target dev='sde' bus='scsi'/> <serial>3f1b719dd9d449ddb2a9</serial> </disk> <disk device='disk' type='file'> <driver name='qemu' type='qcow2' cache='none' discard='unmap' /> <source file='/mnt/f53286ae-f882-3b10-9142-0992be9ce77d/c23f9dd4-84cb-4061-8be3-6489536a4794'/> <target dev='sdf' bus='scsi'/> <serial>c23f9dd484cb40618be3</serial> </disk> <disk device='cdrom' type='file'> <driver name='qemu' type='raw' /> <source file=''/> <target dev='sde' bus='sata'/> </disk> ... ``` The same target name appears twice, once for a data volume and once for an empty pre-allocated CD-ROM. BIOS VMs with an IDE CD-ROM (hd*) and virtio data disks (vd*) don't show the problem. ### versions 4.23+ ### The steps to reproduce the bug 1. Deploy a VM with bootype UEFI and attach enough data disks that auto-allocation reaches a device seq used by an extra CD-ROM slot. (say 3 data disks) 3. Start the VM and check virsh dumpxml. ### What to do about it? no data disk shares a device seq with a pre-allocated CD-ROM slot. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
