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.emmerich@xxxxxxxx> 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 <mcave@xxxxxxx> wrote:
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> Greetings all!
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> 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.
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> We deploy/manage using Ceph Ansible.
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> I’m okay with updating the OSDs to LVM and understand that it will require a full rebuild of each OSD.
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> 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?
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> 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)?
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> I would then do the upgrade to Nautilus from Mimic after all the OSDs were converted.
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> I’m looking for opinions on best practices to complete this as I’d like to minimize impact to our clients.
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> Cheers,
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> Mike Cave
>
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