This doesn't affect RHEL8 - the linked bug https://bugzilla.redhat.com/show_bug.cgi?id=1985499 shows it was fixed in RHEL in 2021. The issue was only seen on Ubuntu 18.04, which has a much older kernel (RHEL backports many kernel fixes, the version number doesn't tell you much). Later Ubuntu releases are also unaffected.
On Thu, Jul 25, 2024 at 10:54 AM Jeroen Roodhart <j.r.roodhart@xxxxxx> wrote:
Hi Casey,
Thank you for your answer.
>if you aren't ready for an OS upgrade, using Ceph in containers may
help in the meantime
Then maybe you can put my mind to ease since we are running our cluster
containerised since the Pacific release on the advised platform at the
time, RHEL 8 (well OK, Alma 8).
We have since, as per recommendation, upgraded to Reef.
However, as I understand the issue as outlined in the release notes and
the call, the problem is that the new containers are performing a
syscall that is not properly supported by the kernel of our host systems.
If that would be the case and had I not read the release notes, I can
only hope that our testing procedure would have caught this issue before
going into production. Would the issue be of the kind that produces
subtle misbehaviour, there would therefore be a decent chance that this
would affect our production environment.
Again, this is a minor release. Is it strange to expect minor upgrades
not to brake compatibility with the kernel/cgroup versions that were
current when going into production?
(If yes, I would like to call "foul" and ask for a VAR-decision
(apologies for the football reference) :-) ).
With kind regards,
Jeroen
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Jeroen Roodhart University of Amsterdam
Strategic IT Consultant Science faculty
j.r.roodhart@xxxxxx Researcher's IT support
Tel. +31 20 525 7203 feiog-tech-science@xxxxxx
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