Issue
This is the CLI version of https://issues.redhat.com/browse/RHEL-24797.
What were you trying to do that didn't work?
Deleting a storage volume on a domain with snapshots.
Please provide the package NVR for which bug is seen:
libvirt-daemon-9.10.0-1.el9.x86_64
How reproducible:
Always
Steps to reproduce
Create a VM, attach a disk, snapshot it, detach the disk again, and delete it:
virt-install --memory 50 --pxe --virt-type qemu --os-variant alpinelinux3.8 --wait 0 --name test1
virsh vol-create-as default attic --capacity 100M
virsh attach-disk test1 /var/lib/libvirt/images/attic vdb
virsh snapshot-create-as test1 --name test1snap1 --memspec /var/lib/libvirt/images/test1-snap1-mem
virsh detach-disk --live test1 vdb
sleep 5
virsh vol-delete attic --pool default
Actual results
This is a bad situation: You can't revert the snapshot or delete it because the image is gone:
# virsh snapshot-revert test1 test1snap1
error: Failed to revert snapshot test1snap1
error: unsupported configuration: source for disk 'vdb' is not a regular file; refusing to generate external snapshot name
# virsh snapshot-delete test1 test1snap1
error: Failed to delete snapshot test1snap1
error: invalid argument: disk 'vdb' not found in domain
But you also can't delete the VM as there is an existing snapshot:
# virsh destroy test1
error: Failed to destroy domain 'test1'
error: Requested operation is not valid: domain is not running
# virsh undefine test1
error: Failed to undefine domain 'test1'
error: Requested operation is not valid: cannot delete inactive domain with 1 snapshots
So there's no way to clean this up.
Expected results
Libvirt seems to make backups/copies of storage volumes during snapshots, e.g. it copies/renames my /var/lib/libvirt/images/attic to /var/lib/libvirt/images/attic.1707479237 .
If that is meant to work, then both snapshot-revert and snapshot-delete should succeed and restore the volume.
If it isn't supported, then virsh vol-delete attic should fail with something like "this volume is referenced in snapshot test1snap1".
