[lustre-discuss] CentOS Stream 8/9 support?

[Andreas Dilger]

On Jun 22, 2023, at 06:58, Will Furnass via lustre-discuss <lustre-discuss at lists.lustre.org<mailto:lustre-discuss at lists.lustre.org>> wrote:

Hi,

I imagine that many here might have seen RedHat's announcement
yesterday about ceasing to provide sources for EL8 and EL9 to those
who aren't paying customers (see [1] - CentOS 7 unaffected).  For many
HPC sites using or planning to adopt Alma/Rocky 8/9 this prompts a
change of tack:
- buy RHEL 8/9
- switch to CentOS 8/9 Stream for something EL-like
- switch to something else (SUSE or Ubuntu)

Those wanting to stick with EL-like will be interested in how well
Lustre works with Stream 8/9.  Seems it's not in the support matrix
[2].  Have others here used Lustre with Stream successfully?  If so,
anything folks would care to share about gotchas if encountered?  Did
you used patched or unpatched kernels?

For clients I don't think it will matter much, since users often have to build
their own client RPMs (possibly via DKMS), or they use weak updates to
avoid rebuilding the RPMs at all for client updates.  The Lustre client code
itself works with a wide range of kernel versions (3.10-6.0 currently), and
I suspect that relatively few production systems want to be on the bleeding
edge of Linux kernels either, so the lack of 6.1-6.3 kernel support is likely
not affecting anyone, and even then patches are already in flight for them.

Definitely servers will be more tricky, since the baseline will always be
moving, and more quickly than EL kernels.

[1] https://www.redhat.com/en/blog/furthering-evolution-centos-stream
[2] https://wiki.whamcloud.com/display/PUB/Lustre+Support+Matrix

Cheers,

Will

--
Dr Will Furnass | Research Platforms Engineer
IT Services | University of Sheffield


Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Whamcloud







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