Hey Jamie,
thanks for replying. I was wondering about gluster g-rep, but what if
something that just happened to me (gluster f*ckup) will get replicated
too. At this point (lost 3 HCI clusters due to Gluster) I am not really
trusting this piece of software with my live data *and* my backups.
I am really protecting myself against Gluster than anything else. So for
backup purposes: The less Gluster, the better.
-Chris.
On 06/02/2020 18:31, Jayme wrote:
You should look at the gluster georeplication option, I think it would
be more appropriate for disaster recovery purposes. It is also possible
to export VMs as OVA which can then be reimported back into oVirt. I
actually just wrote an ansible playbook to do this very thing and intend
to share my finding and playbooks with the ovirt community hopefully
this week.
On Thu, Feb 6, 2020 at 12:18 PM Christian Reiss
<[email protected] <mailto:[email protected]>> wrote:
Hey folks,
Running a 3-way HCI (again (sigh)) on gluster. Now the _inside_ of the
vms is backup'ed seperatly using bareos on an hourly basis, so files
are
present with worst case 59 minutes data loss.
Now, on the outside I thought of doing gluster snapshots and then
syncing those .snap dirs away to a remote 10gig connected machine on a
weekly-or-so basis. As those contents of the snaps are the oVirt images
(entire DC) I could re-setup gluster and copy those files back into
gluster and be done with it.
Now some questions, if I may:
- If the hosts remain intact but gluster dies, I simply setup
Gluster,
stop the ovirt engine (seperate standalone hardware) copy everything
back and start ovirt engine again. All disks are accessible again
(tested). The bricks are marked as down (new bricks, same name). There
is a "reset brick" button that made the bricks come back online again.
What _exactly_ does it do? Does it reset the brick info in oVirt or
copy
all the data over from another node and really, really reset the brick?
- If the hosts remain intact, but the engine dies: Can I re-attach the
engine the the running cluster?
- If hosts and engine dies and everything needs to be re-setup would it
be possible to do the setup wizard(s) again up to a running point then
copy the disk images to the new gluster-dc-data-dir? Would oVirt rescan
the dir for newly found vms?
- If _one_ host dies, but 2 and the engine remain online: Whats the
oVirt way of resetting up the failed one? Reinstalling the node and
then
what? From all the cases above this is the most likely one.
Having had to reinstall the entire Cluster three times already scares
me. Always gluster related.
Again thank you community for your great efforts!
--
with kind regards,
mit freundlichen Gruessen,
Christian Reiss
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--
with kind regards,
mit freundlichen Gruessen,
Christian Reiss
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