RHEL VMs with LXD, no datasource

Well, this is not going to work.
Apparently, lxd-agent need virtiofs or 9p to be available in the guest.

Error message when starting lxd-agent from my RHEL7 guest VM :

“couldn’t mount virtiofs or 9p, failing.”

Pretty explicit.

Ah yes I forgot it needs that to load its certificates.