On Fri, Dec 31, 2021 at 2:40 AM Strahil Nikolov via Users <users@ovirt.org> wrote:
The migration from 4.3 to 4.4 is done by the same method... It always worked but for major version upgrade there is a strict requirement which version the backup was done.
A small clarification: engine-backup's backup/restore never intended to support, let's call this, "functional downgrade" - restoring to a version older than the one used for backup. For a long time, it supported only restoring to the same X.Y, ignoring Z. In 3.6->4.0 and 4.3->4.4 we also patched it to allow, as you mention, upgrading, as a means to migrate to a new OS version. It's quite likely we'll do the same in 4.4->4.5, because we plan to support also CentOS Stream 9. At some point in 4.4, we noticed that upgrading from a too-old 4.3 is broken, so we also patched it to require a minimal 4.3 (4.3.10). But until quite recently, downgrade inside the same X.Y was not prevented. See also: https://bugzilla.redhat.com/show_bug.cgi?id=1932392 Best regards,
Even if it doesn't work - a fresh engine can still recover the VMs by importing the storage domain (no VM snapshots are allowed), yet other settings might be lost (VM networks, users,etc)
Also, I forgot to mention that with GlusterFS, you can create a snapshot as a point in time recovery (shut down the engine first as it has a DB) on the Engine's volume.
Happy Holidays!
Best Regards, Strahil Nikolov
On Fri, Dec 31, 2021 at 2:33, Strahil Nikolov <hunter86_bg@yahoo.com> wrote: Well, you can shut down the engine (don't forget the global maintenance), yum update, reboot -> the host is updated
Then wait for ovirt-ha-agent & ovirt-ha-broker to bring the engine up. Global maintenance, wipe the storage (assuming NFS/GlusterFS is used) or at least rename the subdirectory to something different. Restore from backup and it should be back as new.
Best Regards, Strahil Nikolov
On Tue, Dec 28, 2021 at 0:27, Joseph Goldman <joseph@goldman.id.au> wrote: _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/SZWVLPZDESDW24...
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