Goal

• As a user of libvirt live migration I would like to be able to tell libvirt to ignore shared storage, so that if I migration from one shared storage volume to another shared storage volume, it will not assume that they are the same and not copy data.

This is needed for KubeVirt cross cluster live migration (or storage migration between different storage classes). We noticed that when migrating software TPM devices, it would not migrate the tpm information when both ends where using NFS volumes. This appears to happen because libvirt sees that both the source and target are shared storage, and assumes it is the same volume, and thus it shouldn't copy the data (which makes sense). I would like to have some mechanism where I can tell libvirt to copy the data regardless of shared storage.

Acceptance criteria

A list of verification conditions, successful functional tests, or expected outcomes in order to declare this story/task successfully completed.

• Some mechanism is available during migration to tell libvirt to ignore shared storage, and still copy data over the network