- Qlustar General - Qlustar Mailing Lists

Security/Bug fix releases 14.1.14, 13.4.13
by no-reply-list＠qlustar.org 03 Oct '26

03 Oct '26

The Qlustar releases 14.1.14 and 13.4.13 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2026/1003261 https://qlustar.com/qsa/2026/1003262 The following non-security related updates/enhancements/bug fixes are included: For Qlustar 14 only: - Minor changes + Re-enabled sssd socket activation and re-added sssd providers that were removed in 14.1.13. + Update spack to work with slurm 25.05.9

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Security/Bug fix releases 14.1.13, 13.4.12
by no-reply-list＠qlustar.org 29 Sep '26

29 Sep '26

The Qlustar releases 14.1.13 and 13.4.12 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2026/0925261 https://qlustar.com/qsa/2026/0925262 https://qlustar.com/qsa/2026/0925263 The following non-security related updates/enhancements/bug fixes are included: For Qlustar 14 only: - Update to QluMan 14.2.0 * Major QluMan GUI overhaul - Add theming support with new modern QluMan themes. Default is a dark theme. - Easily select the theme and font settings via an improved Preferences dialog. - Completely reimplement saving/restoring GUI settings + All settings are now saved in a user-specific sqlite database. This prevents occasional GUI crashes caused by the previous native Qt save/restore method. + The complete state of subwindows is restored when reopening them or when the GUI is restarted. + Saves/restores - Main window size and position - Subwindow sizes and positions - Subwindow's position of sliders - Subwindow's tree state (collapsed/uncollapsed) - Add subwindow snapping support: Subwindow borders snap to the main window borders or to the borders of other subwindows. Allows a nice and clean arrangement of subwindows. - Add resize column to contents for tables by mouse double-click. - New SVG LED icons * QluMan GUI network proxy/web browser support - Highly improve the reliablity and speed of the internal qluman-qt network proxy when the embedded firefox connects to cluster-internal Web interfaces like the node's BMC web frontends, Grafana or the prometheus pages. - Add a Browser Statistics subwindow, showing details about all browser connections. - Allow to switch on network proxy debugging on-the-fly. * QluMan GUI Slurm support - Job managment dialog + Fix the job filter mechanism + Fix search not working correctly for some columns + Fix problem when commiting columns to layout settings + Fix int sorting - Prevent slurm fairshare dialog to be stuck in an infinite loop * Misc QluMan GUI fixes - Don't remove image modules that depend on core - Prevent EnclosureView from throwing an execption when the GPU type is None - Misc fixes for switch data fetching. * Slurm - Add SLURM_ADD_USER_RETRIES = 4 to limit the number of retries when adding slurm users in the background. - Catch exception fetching slurm data from pyslurm so qluman-slurmd doesn't go into a respawn loop. - Use hostname override for gres.conf entries too. * Alerts - Output progress opening the expression editor on the console - Added nvidia-580 and nvidia-595 driver packages and Qlustar image modules They each contain the complete corresponding driver-dependent Enterprise Nvidia GPU stack. - Minor changes + Disable undesired sssd socket activation and remove unneeded sssd providers.

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Security/Bug fix releases 14.1.12, 13.4.11
by no-reply-list＠qlustar.org 15 Sep '26

15 Sep '26

The Qlustar releases 14.1.12 and 13.4.11 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2026/0915261 https://qlustar.com/qsa/2026/0915262 https://qlustar.com/qsa/2026/0915263 The following non-security related updates/enhancements/bug fixes are included: - Update to Slurm 25.05.9 For Qlustar 14 only: - Update to Ubuntu 24.04.5 LTS

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Spack DB visibility delay on compute nodes — NFSv3 mount session never refreshes (mount -o remount is a no-op)
by garroyo＠ifimar-conicet.gob.ar 31 Aug '26

31 Aug '26

Hi all, We run Qlustar 14 with the standard Spack "HPC Core Stack" setup (softadm group, /srv/apps NFSv3 export, diskless netboot compute nodes). We ran into a reproducible issue that we tracked down fully and wanted to share, since it doesn't seem to be documented anywhere and may affect other sites with the same standard layout. ## Symptom After `spack install <pkg>` completes on the head node, the new package is correctly visible via `spack find` on the head node immediately, but stays INVISIBLE from `spack find` on compute nodes for an unpredictable amount of time — anywhere from hours to several days. Raw reads of `.spack-db/index.json` on the affected compute node (via `grep`/`cat`) show the file IS up to date at the filesystem level (correct mtime/size/content), but `spack find` on that same node, at that same moment, still returns the stale package list. So it isn't a filesystem staleness problem in the usual sense — the data is there and correct, but the client's NFS session serving it isn't being refreshed. ## Root cause found The compute nodes mount `/srv/apps` (NFSv3, hard, tcp) at boot. This mount is NOT in `/etc/fstab` in our default netboot image — it's set up directly during boot by the image/initramfs, outside of fstab. We confirmed via `/proc/self/mountstats` that the mount's `age` field stays constant (multiple days) even immediately after running `mount -o remount /apps/local` as root. In other words, **`-o remount` does not reset the underlying NFS session at all** — it's a superficial VFS-level operation. We initially believed a remount was fixing the visibility issue (it appeared to work in a few manual tests), but a follow-up sweep showed previously "fixed" nodes degraded again within hours — which matches: the apparent fix was never a real session refresh, just coincidental timing. The actual fix is a genuine `umount` + `mount` cycle (not `-o remount`). After that, `age` in mountstats correctly resets to 0, and `spack find` immediately reflects the current DB. ## Fix validated in production (18 compute nodes) Interesting operational detail: since we deliberately avoid `-f`/`-l` on the `umount`, this is safe to run even on nodes with active jobs. On nodes where a job had open file handles under the mount, `umount` simply fails cleanly ("device is busy") without touching anything — but the subsequent `mount` still succeeds, stacking a fresh NFS session on top of the busy one underneath. Processes with the old mount already open keep working unaffected; new path lookups get the fresh session. We validated this across all 18 compute nodes in one pass, without filtering for idle state: 18/18 converged to the correct package count, zero jobs affected. ## Questions for the list - Has anyone else hit this specific NFSv3-session-staleness-vs-remount behavior with Spack on Qlustar's standard /srv/apps layout? - Is there a recommended/supported way to trigger a real per-node NFS session refresh after Spack installs (e.g. a hook in the install workflow, or a documented cron pattern), rather than each site reinventing this? - Is NFSv4 (with its integrated locking/session model) considered a supported alternative for /srv/apps in a future Qlustar release, given /srv was reportedly chosen specifically to keep that door open? Happy to share our diagnostic scripts / the umount+mount wrapper we use if useful to anyone else. Thanks, Gonzalo Arroyo IFIMAR-UNMDP / CONICET HPC cluster

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Security/Bug fix releases 14.1.11, 13.4.10
by no-reply-list＠qlustar.org 29 Aug '26

29 Aug '26

The Qlustar releases 14.1.11 and 13.4.10 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2026/0829261 https://qlustar.com/qsa/2026/0829262 No non-security related updates/enhancements/bug fixes are included.

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Security/Bug fix releases 14.1.10, 13.4.9
by no-reply-list＠qlustar.org 22 Aug '26

22 Aug '26

The Qlustar releases 14.1.10 and 13.4.9 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2026/0822261 https://qlustar.com/qsa/2026/0822262 No non-security related updates/enhancements/bug fixes are included.

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Qlustar 14, cannot use lustre-2.15 module
by Rolandas Naujikas 12 Aug '26

12 Aug '26

Hi, The following packages have unmet dependencies: qlustar-module-lustre-2.15-noble-amd64-14 : Depends: qlustar-module-core-noble-amd64-14 (= 14.0.5-b589f1605) but 14.1.9-b589f1641 is to be installed So I forced to use lustre-2.17, but I would like to update first from Qlustar 13 with lustre-2.15 to the same version of Lustre, so I could go back in case of problems. Regards Rolandas

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Security/Bug fix releases 14.1.9, 13.4.8
by no-reply-list＠qlustar.org 08 Aug '26

08 Aug '26

The Qlustar releases 14.1.9 and 13.4.8 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2026/0808261 https://qlustar.com/qsa/2026/0808262 No non-security related updates/enhancements/bug fixes are included.

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Security/Bug fix releases 14.1.8, 13.4.7
by no-reply-list＠qlustar.org 01 Aug '26

01 Aug '26

The Qlustar releases 14.1.8 and 13.4.7 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2026/0801261 https://qlustar.com/qsa/2026/0801262 The following non-security related updates/enhancements/bug fixes are included: For Qlustar 14 only: - Add mstflint 4.36.0 (Nvidia/Mellanox firmware management tools) Debian package and also add the tools to the ofed qlustar image module. - On AlmaLinux 8 only: Fix the Qlustar nvidia prometheus scraper and make sure the qlustar-prometheus-node-metrics systemd timer is activated at boot.

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Qlustar Feature Update 07/26
by no-reply-list＠qlustar.org 31 Jul '26

31 Jul '26

A large bunch of new features were completed and published since the last Qlustar 14 feature release 11/25. Please consult the comprehensive overview at https://qlustar.com/news/2026/2026-07-31-feature-update-07-26

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Qlustar General