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".