So would you recommend doing an entire node at the same time or per-osd?
Senior Systems Administrator
Research Computing Services Team
University of Victoria
O: 250.472.4997
On 2019-11-15, 10:28 AM, "Paul Emmerich" <paul.emmer...@croit.io> wrote:
You'll have to tell LVM about multi-path, otherwise LVM gets confused.
But that should be the only thing
Paul
--
Paul Emmerich
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On Fri, Nov 15, 2019 at 6:04 PM Mike Cave <mc...@uvic.ca> wrote:
>
> Greetings all!
>
>
>
> I am looking at upgrading to Nautilus in the near future (currently on
Mimic). We have a cluster built on 480 OSDs all using multipath and simple
block devices. I see that the ceph-disk tool is now deprecated and the
ceph-volume tool doesn’t do everything that ceph-disk did for simple devices
(e.g. I’m unable to activate a new osd and set the location of wal/block.db, so
far as I have been able to figure out). So for disk replacements going forward
it could get ugly.
>
>
>
> We deploy/manage using Ceph Ansible.
>
>
>
> I’m okay with updating the OSDs to LVM and understand that it will
require a full rebuild of each OSD.
>
>
>
> I was thinking of going OSD by OSD through the cluster until they are all
completed. However, someone suggested doing an entire node at a time (that
would be 20 OSDs at a time in this case). Is one method going to be better than
the other?
>
>
>
> Also a question about setting-up LVM: given I’m using multipath devices,
do I have to preconfigure the LVM devices before running the ansible plays or
will ansible take care of the LVM setup (even though they are on multipath)?
>
>
>
> I would then do the upgrade to Nautilus from Mimic after all the OSDs
were converted.
>
>
>
> I’m looking for opinions on best practices to complete this as I’d like
to minimize impact to our clients.
>
>
>
> Cheers,
>
> Mike Cave
>
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