Hi Alex,
I don't have a real good answer, just wanted to mention that one of
our customers had some issues with multi-site when they were on the
same major version (Octopus) but not on the same minor version. But it
wasn't that the sync didn't work at all, it worked in general. Only
from time to time, the sync status would show errors. And after
updating the second site to the same minor version, the issues never
came back. But from what I read in this list, it doesn't appear to be
a general problem with version mismatch, so I wouldn't expect one sync
direction to fail entirely. Maybe it's a configuration issue? Has it
ever worked before or have you just set up the second site and it
failed right from the start?
Zitat von "Alex Hussein-Kershaw (HE/HIM)" <alexhus@xxxxxxxxxxxxx>:
I wondered if this applies: Ceph Releases (general) — Ceph
Documentation<https://docs.ceph.com/en/latest/releases/general/>.
"Online, rolling upgrade support and testing from the last two (2)
stable release(s) (starting from Luminous)." - which does imply I'm
doing something invalid with one site on Squid and one on Octopus.
However, I've reproduced this between Quincy (17.2.7) and Squid
(19.2.0) now too, which according to the link above is a valid
upgrade path. To be clear, I have:
*
SiteA (Quincy) < --- syncing --- > SiteB (Squid).
*
Write objects to SiteB, they appear on siteA shortly after.
*
Write objects to SiteA, they never appear on siteB.
It seems to be 100% reproducible. Suspect I need to raise a tracker.
I welcome any suggestions that I'm doing this wrong meanwhile.
________________________________
From: Alex Hussein-Kershaw (HE/HIM)
Sent: Friday, November 1, 2024 8:49 AM
To: ceph-users <ceph-users@xxxxxxx>
Subject: Ceph Multisite Version Compatibility
Hi folks. I'm looking for some guidance on RGW multisite version
sync compatibility. Particularly between Octopus and Squid. Context
is I have two sites in a multisite pair replicating all S3 data. One
is on Squid, one is on Octopus. Should I expect the multisite sync
to just work between these versions?
I'm observing that both sites "radosgw-admin sync status" reports
that we're in sync, but objects from the Octopus zone are not
replicated to the Squid zone (but the opposite direction is fine).
Might be this just isn't a valid setup, but failing to a reference
that claims something like "must be within +/- 1 version of the
other zones").
Thanks,
Alex
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