Comment 14 for bug 1835926

Hi,

Hi,

Could it be that this fix introduced the behavior below?

1. Build a VM OS Debian : instances.root_device_name = /dev/sda
2. Attach a volume to the instance
3. Rebuid this VM with OS Ubuntu : instances.root_device_name is still /dev/sda while in the VM itself it is now /dev/vda
4. The volume is no longer attached and fails with

Failed to attach f3c12921-66ab-47b4-99dc-ed2dc67c32ba at /dev/vda: libvirt.libvirtError: internal error: unable to execute QEMU command 'device_add': Duplicate ID 'virtio-disk0' for device

This fixes the issue :
MariaDB [novadb]> UPDATE instances SET root_device_name="/dev/vda" WHERE uuid='f6a607aa-7142-47ba-a87a-e027c0b58dbb' LIMIT 1;