Re: [ovirt-users] Restoring Hosted-Engine from a stale backup

>>>> 1. What problems can I expect to have with VMs added/modified >>>> since the last backup? >>>> >>>> Modified VMs will be reverted to the previous configuration; >> additional VMs should be seen as external VMs, then you could import. >> > > Given VDSM kept the VMs up whilst the HE's been down, how will the > running VMs that were present before & after the backup be affected? > > Many of the VMs that were present during the last backup are now on > different hosts, including the HE VM. Will that cause any issues? > For normal VMs I don't expect any issue: the engine will simply update the correspondent record once it will find them on the managed hosts. A serious issue could instead happen with HA VMs: if the engine finds earlier an HA VM as running on a different host it will simply update its record, the issue is if it finds earlier the VM a not on the original host since it will try to restart it causing a split brain and probably a VM corruption. I opened a bug to track it: https://bugzilla.redhat.com/show_bug.cgi?id=1419649