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Upgrading storage on bordeaux.guix.gnu.org
From: |
Ludovic Courtès |
Subject: |
Upgrading storage on bordeaux.guix.gnu.org |
Date: |
Mon, 06 Dec 2021 13:51:49 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) |
Hello!
(+Cc: Andreas.)
Ricardo Wurmus <rekado@elephly.net> skribis:
> [space is running out on bayfront, so I wrote:]
>
>> Remember that I’ve got three 256G SSDs here that I could send to
>> wherever bayfront now sits. With LVM or a RAID configuration these
>> could just be added to the storage pool — if bayfront has
>> sufficient slots for three more disks.
>
> You wrote in response:
>
>> Good to know. In that case we’d need to come up with (1) an updated
>> Guix System config with LVM, and (2) a way to copy the existing
>> store
>> over to the new storage, which sounds tricky if the existing disk is
>> to
>> be kept.
>
> We could first install Guix System with the adjusted bayfront config
> on a separate machine (e.g. on a build node at the MDC), onto a volume
> with LVM (using as many of the SSDs as needed). Copy signing keys etc
> from bayfront. Then we’d pretty much export/import the bayfront store
> over the network. Once everything has been copied, we turn off
> bayfront, swap the disks, boot it up again. If everything works all
> right we add the original disk (and any unused left-over disks) to the
> LVM volume to extend the storage pool.
Sounds like a plan. But note that there’s the store and there’s the
cached nars, though maybe we can tolerate missing, say, a week or two of
nars.
It would be more convenient to do that with a machine already in the
vicinity of bayfront though, so we can more easily move the disks there
when we’re ready. Maybe we could use a machine at Inria or the math
institute next door. Andreas, WDYT? (We can work out the details
off-list.)
>> (Also I think we’re down to 1.5 person who could go on
>> site. :-/)
>
> Not great :-/
Here’s a call: if you’re in the whereabouts of Bordeaux, France, and
would like to help, please get in touch with Andreas and myself! We
need to increase our tramway factor.
Cheers,
Ludo’.