<div dir="ltr"><div dir="ltr">Thanks for the information. It would be really helpful if there was a clearly described way of how to construct lustre client rpms with the patches for a newer RHEL version. That would indeed allow us to switch to a more recent kernel if security issues require this.<br>Is that documentation available somewhere? As far as I can see the RHEL 9.8 patches have not been merged into the b2_15 branch. Does a 2.15.9 RC branch exist somewhere?</div><div dir="ltr"><br></div><div dir="ltr"><div>Fokke</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Op do 4 jun 2026 om 14:41 schreef Peter Jones <<a href="mailto:pjones@thelustrecollective.com" target="_blank">pjones@thelustrecollective.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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I acknowledge that there is a window between a new Red Hat minor version releasing and a fully-qualified of Lustre supporting that version being released.</div>
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Efforts are made to keep this window as small as possible (work is done with beta versions when available for example), but there are usually other factors involved than purely RHEL updates to consider and time needs to be allocated for testing.</div>
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Given that the work for the client support of the new RHEL version is publicly available ahead of the formal release being available, I would have thought that this would provide a suitable stopgap in the event of something urgent coming up.</div>
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Is there something which makes this unworkable or is there just a lack of documentation for people to feel confident enough to attempt this?</div>
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<b>From: </b>lustre-discuss <<a href="mailto:lustre-discuss-bounces@lists.lustre.org" target="_blank">lustre-discuss-bounces@lists.lustre.org</a>> on behalf of Fokke Dijkstra via lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>><br>
<b>Date: </b>Thursday, June 4, 2026 at 12:36\u202fAM<br>
<b>To: </b><br>
<b>Cc: </b><a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a> <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>><br>
<b>Subject: </b>Re: [lustre-discuss] RHEL 9.8 and 10.2 support<br>
<br>
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</div>
<div style="direction:ltr">
I would also like to stress the importance of having Lustre supporting the latest RedHat kernels as soon as possible. We have seen several privilege escalation exploits in the last month, for which we had to temporarily limit or disable access to our cluster
to prevent somebody from using the exploits.<br>
If we would also have had to wait for a Lustre client update, before we could patch our services that would have been disastrous. Since the fixes were still released for Alma Linux 9.7 we managed to patch within a few days.<br>
If a new vulnerability were to be published now we would be in great trouble, as we currently cannot run Alma Linux 9.8 kernels with a working Lustre client. And given the frequency with which critical vulnerabilities have appeared I don't think we have seen
the end of this.</div>
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Kind regards,</div>
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Fokke Dijkstra</div>
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<div class="gmail_attr" style="direction:ltr">Op di 2 jun 2026 om 16:08 schreef Peter Jones via lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>>:</div>
<blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)">
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Georgios</div>
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<br>
</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
The plan is to finalize which the next LTS release will be - 2.17 vs 2.18 - by the end of this month. Whatever the outcome, there will be support for RHEL 10.x clients.</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
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<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Peter</div>
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<b>From: </b>lustre-discuss <<a href="mailto:lustre-discuss-bounces@lists.lustre.org" target="_blank">lustre-discuss-bounces@lists.lustre.org</a>> on behalf of Georgios Magklaras via lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>><br>
<b>Date: </b>Tuesday, June 2, 2026 at 4:32\u202fAM<br>
<b>To: </b><a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a> <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>><br>
<b>Subject: </b>Re: [lustre-discuss] RHEL 9.8 and 10.2 support<br>
<br>
</div>
</div>
<div style="direction:ltr">For David: For RHEL 10.2, there are patches (including one suggestion from me) as part of LU 20312:
<a href="https://jira.whamcloud.com/browse/LU-20312" target="_blank">
https://jira.whamcloud.com/browse/LU-20312</a></div>
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<div style="direction:ltr">We are of course in the process of testing this.</div>
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<div style="direction:ltr">For Peter: We also echo the LTS issue. We are using primarily 2.15.x, with 2.16.1 at a smaller part of our production. 2.17.x is used as part of our test environment, because we are encountering issues with 2.16.1 . For RHEL 10.x,
we would like to know what would be the LTS Lustre release. </div>
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<div style="direction:ltr">Best regards,</div>
<div style="direction:ltr">GM</div>
<div style="direction:ltr">-- </div>
<div style="direction:ltr">--</div>
<div style="direction:ltr">--</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr"><b>Georgios Magklaras PhD</b></div>
<div style="direction:ltr">Chief Engineer</div>
<div style="direction:ltr">IT Infrastructure/HPC</div>
<div style="direction:ltr">The Norwegian Meteorological Institute</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr;color:rgb(86,163,241)"><a href="https://www.met.no/" style="color:rgb(86,163,241)" target="_blank">https://www.met.no/</a></div>
<div style="direction:ltr;color:rgb(86,163,241)"><a href="https://www.steelcyber.com/georgioshome/" style="color:rgb(86,163,241)" target="_blank">https://www.steelcyber.com/georgioshome/</a></div>
<div style="direction:ltr"><br>
</div>
<div class="gmail_attr" style="direction:ltr">On Tue, 2 Jun 2026 at 11:45, Hans Henrik Happe via lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>>
wrote:</div>
<blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)">
<div class="gmail_quote" style="direction:ltr">The work is tracked in <a href="https://jira.whamcloud.com/browse/LU-20071" id="m_4277235273708974149m_-2104122103051869355m_-5473038102296307621m_-843081482198707500m_4727304991567963322m_-8225123516406798014key-val" rel="96792" target="_blank">
LU-20071</a> for the RHEL 9.8 and there is a patch. Haven't tested it myself.<br>
<br>
You need RHEL 9.8 to get a kernel that fixes all the known root escalation security issues. So I agree that we are in a bit of a limbo until an RHEL 9.8 LTS version of Lustre is ready. However, I think Alma did a special security kernel for RHEL 9.7. I know
Rocky did.<br>
<br>
</div>
<div class="gmail_quote" style="direction:ltr">On 01/06/2026 19.16, Peter Jones via lustre-discuss wrote:</div>
<blockquote>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
So do I understand correctly that your concern is that:</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<ol start="1" style="direction:ltr;margin-top:0px;margin-bottom:0px">
<li style="font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0);direction:ltr;margin-top:0px;margin-bottom:0px;list-style-type:"1) "">
<div class="gmail_quote" role="presentation" style="direction:ltr">there are vulnerabilities in RHEL 10.2 that also affect RHEL 10.1 but there are no updates for RHEL 10.1 once RHEL 10.2 is GA</div>
</li><li style="font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0);direction:ltr;margin-top:0px;margin-bottom:0px;list-style-type:"2) "">
<div class="gmail_quote" role="presentation" style="direction:ltr">RHEL 10.x is not supported by the current Lustre LTS branch (2.15.x) </div>
</li></ol>
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<br>
</div>
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If so, the good news is that we expect to have a newly designated LTS branch in the near future that will support RHEL 10.x clients. </div>
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<br>
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Longer term, there are efforts to get Lustre into the upstream kernel, which would completely eliminate any of these issues.</div>
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<br>
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In the meantime, if you are ever in the position of wanting to move to kernel versions ahead of formal support being available, my recommendation would be to experiment with a limited number of clients (perhaps even just one) before rolling out across all the
clients.</div>
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<b>From: </b>David Cohen <a href="mailto:cdavid@physics.technion.ac.il" target="_blank">
<cdavid@physics.technion.ac.il></a><br>
<b>Date: </b>Monday, June 1, 2026 at 8:41\u202fAM<br>
<b>To: </b>Peter Jones <a href="mailto:pjones@thelustrecollective.com" target="_blank">
<pjones@thelustrecollective.com></a><br>
<b>Cc: </b>lustre-discuss <a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">
<lustre-discuss@lists.lustre.org></a><br>
<b>Subject: </b>Re: [lustre-discuss] RHEL 9.8 and 10.2 support<br>
<br>
</div>
</div>
<div style="direction:ltr">Hi Peter,</div>
<div style="direction:ltr">For the EL 10.1 client I was using version 17.0 which was the only version to support EL 10. After upgrading to EL 10.2 the client lost the storage mount.</div>
<div style="direction:ltr">I'm not updating the EL9.7 clients, not to risk losing the storage mount. They are running the 2.15 LTS Lustre.</div>
<div style="direction:ltr">On the servers I am still using the 2.15 version on EL 8.10 as I prefer to use the LTS version, and there is no LTS server support beyond EL 8.10.</div>
<div style="direction:ltr">This complex matrix just emphasizes how much Lustre is a restrictive factor for upgrades.</div>
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<div style="direction:ltr">David</div>
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<div class="gmail_attr" style="direction:ltr">On Mon, Jun 1, 2026 at 4:48\u202fPM Peter Jones <<a href="mailto:pjones@thelustrecollective.com" target="_blank">pjones@thelustrecollective.com</a>> wrote:</div>
<blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)">
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
David</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Could you please clarify what version of Lustre you are using today for both servers and clients? Also, are you using ldiskfs or ZFS as the backend filesystem?</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Peter</div>
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<br>
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<b>From: </b>David Cohen <<a href="mailto:cdavid@physics.technion.ac.il" target="_blank">cdavid@physics.technion.ac.il</a>><br>
<b>Date: </b>Sunday, May 31, 2026 at 8:25\u202fPM<br>
<b>To: </b>Peter Jones <<a href="mailto:pjones@thelustrecollective.com" target="_blank">pjones@thelustrecollective.com</a>><br>
<b>Cc: </b>lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>><br>
<b>Subject: </b>Re: [lustre-discuss] RHEL 9.8 and 10.2 support<br>
<br>
</div>
</div>
<div style="direction:ltr">Hi Peter,</div>
<div style="direction:ltr">The new kernel presented with EL 10.2 presents changes preventing DKMS from recompiling Lustre modules.</div>
<div style="direction:ltr">There is even a Jira ticket following the issue since the beta, highlighting the security fixes in the new kernels. </div>
<div style="direction:ltr"><a href="https://jira.whamcloud.com/browse/LU-20070" target="_blank">https://jira.whamcloud.com/browse/LU-20070</a></div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr">David</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr"><br>
</div>
<div class="gmail_attr" style="direction:ltr">On Mon, Jun 1, 2026 at 12:19\u202fAM Peter Jones <<a href="mailto:pjones@thelustrecollective.com" target="_blank">pjones@thelustrecollective.com</a>> wrote:</div>
<blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left:1px solid rgb(204,204,204)">
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
David</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Could you please elaborate as to what you feel is missing today? Lustre clients are patchless, so I would expect that if a security update is issued for a given supported release of RHEL that users would just apply the kernel update and weak updates would take
care of the rest with no need to get any updates to Lustre...</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Peter</div>
<div class="gmail_quote" style="direction:ltr;font-family:Aptos,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
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<div style="text-align:left;font-family:Aptos;font-size:12pt;color:black">
<b>From: </b>lustre-discuss <<a href="mailto:lustre-discuss-bounces@lists.lustre.org" target="_blank">lustre-discuss-bounces@lists.lustre.org</a>> on behalf of David Cohen via lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>><br>
<b>Date: </b>Sunday, May 31, 2026 at 5:31\u202fAM<br>
<b>To: </b>lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a>><br>
<b>Subject: </b>[lustre-discuss] RHEL 9.8 and 10.2 support<br>
<br>
</div>
</div>
<div style="direction:ltr">Hi,</div>
<div style="direction:ltr">With the latest critical kernel vulnerabilities, updates are no longer optional.</div>
<div style="direction:ltr">This puts Lustre on the critical path for cluster security.</div>
<div style="direction:ltr">Is there a plan to address this necessity by releasing Lustre client versions outside of the half a year cycle to support the new kernels?</div>
<div style="direction:ltr"><br>
</div>
<div style="direction:ltr">David</div>
</div>
</blockquote>
</div>
</blockquote>
</div>
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</div>
<pre><div class="gmail_quote" style="direction:ltr">_______________________________________________
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</div></pre>
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<div class="gmail_quote" style="direction:ltr">_______________________________________________<br>
lustre-discuss mailing list<br>
<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a><br>
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<div class="gmail_signature" style="direction:ltr">Fokke Dijkstra <a href="mailto:f.dijkstra@rug.nl" target="_blank">
<f.dijkstra@rug.nl></a><br>
Team High Performance Computing</div>
<div class="gmail_signature" style="direction:ltr">Center for Information Technology, University of Groningen<br>
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</blockquote></div></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr">Fokke Dijkstra <a href="mailto:f.dijkstra@rug.nl" target="_blank"><f.dijkstra@rug.nl></a>
<br>Team High Performance Computing</div><div dir="ltr">Center for Information Technology, University of Groningen
<br>Postbus 11044, 9700 CA Groningen, The Netherlands
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