# \#question

**URL:** https://discourse.openondemand.org/tag/question/36.md

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## [Choice of Authentication](https://discourse.openondemand.org/t/choice-of-authentication/4971)

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**Author:** [@James-Allsopp](https://discourse.openondemand.org/u/James-Allsopp)\
**Replies:** 4\
**Last updated:** [September 17, 2026, 7:21am UTC](https://discourse.openondemand.org/t/choice-of-authentication/4971 "2026-09-17T07:21:28Z")

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Hi, We’re installing OpenOnDemand on a Alma9 system with Apache 2.4. The our university can authenticate with either CAS. Shibboleth, or ADFS (mod\_auth\_mellon). Shibboleth seems quite out of date and doesn’t seem to be …

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## [Allowlists for form erb and Shared Apps](https://discourse.openondemand.org/t/allowlists-for-form-erb-and-shared-apps/4975)

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**Author:** [@hansen-m](https://discourse.openondemand.org/u/hansen-m)\
**Replies:** 1\
**Last updated:** [September 14, 2026, 4:29pm UTC](https://discourse.openondemand.org/t/allowlists-for-form-erb-and-shared-apps/4975 "2026-09-14T16:29:16Z")

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Are there any options for limiting form erb by app path or type? Use-case I’m thinking of is with Shared Apps, where currently the maintainers need to have a relatively high level of trust on the system because any form …

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## [Definition Custom Javascript and CSS Files](https://discourse.openondemand.org/t/definition-custom-javascript-and-css-files/4972)

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**Author:** [@coengineer](https://discourse.openondemand.org/u/coengineer)\
**Replies:** 3\
**Last updated:** [September 10, 2026, 1:08pm UTC](https://discourse.openondemand.org/t/definition-custom-javascript-and-css-files/4972 "2026-09-10T13:08:37Z")

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Hello everyone, I have defined in module-browser section, two custom files which are included module.js and module.scss to overload default module-browser page, it was working last week now it does not work, so may be …

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## [Open XDMoD integration working in Firefox but not Chrome/Edge](https://discourse.openondemand.org/t/open-xdmod-integration-working-in-firefox-but-not-chrome-edge/4968)

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**Author:** [@mewho720](https://discourse.openondemand.org/u/mewho720)\
**Replies:** 5\
**Last updated:** [September 3, 2026, 3:11pm UTC](https://discourse.openondemand.org/t/open-xdmod-integration-working-in-firefox-but-not-chrome-edge/4968 "2026-09-03T15:11:41Z")

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Hi, I’ve been running Open OnDemand with the Open XDMoD integration. It works fine in Firefox, but has issues in Chrome/Edge. It worked up until recently, I get the same timeout messages shown in Did anyone have a succe…

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## [Federation support for slurm](https://discourse.openondemand.org/t/federation-support-for-slurm/4966)

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**Author:** [@jcreech](https://discourse.openondemand.org/u/jcreech)\
**Replies:** 8\
**Last updated:** [September 2, 2026, 3:21pm UTC](https://discourse.openondemand.org/t/federation-support-for-slurm/4966 "2026-09-02T15:21:13Z")

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We have slurm federation enabled on our production cluster, with three separate slurm clusters. The idea behind federation is that users can either submit without specifying cluster, in which case each of the clusters is…

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## [VNC tmp files left behind when using LinuxHost adapter](https://discourse.openondemand.org/t/vnc-tmp-files-left-behind-when-using-linuxhost-adapter/4960)

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**Author:** [@mrobbert](https://discourse.openondemand.org/u/mrobbert)\
**Replies:** 3\
**Last updated:** [August 31, 2026, 5:12pm UTC](https://discourse.openondemand.org/t/vnc-tmp-files-left-behind-when-using-linuxhost-adapter/4960 "2026-08-31T17:12:16Z")

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We recently ran into an issue with VNC Desktop sessions on our dedicated “VNC Login” host. We are using the LinuxHost adapter here and found that the /tmp/.X##-lock files were not getting cleaned up in all cases and we f…

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## [Module Browser listing module extensions](https://discourse.openondemand.org/t/module-browser-listing-module-extensions/4963)

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**Author:** [@moravveji](https://discourse.openondemand.org/u/moravveji)\
**Replies:** 0\
**Last updated:** [August 27, 2026, 9:38am UTC](https://discourse.openondemand.org/t/module-browser-listing-module-extensions/4963 "2026-08-27T09:38:09Z")

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Dear all I would like to ask whether it is possible to let the ‘Module Browser’ show the module extensions in addition to the modules, as well? To elaborate further, I’d say that we use Lmod, and we install our softwar…

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## [Problem Changing Job Script in Job Composer -\> Job Options](https://discourse.openondemand.org/t/problem-changing-job-script-in-job-composer-job-options/4958)

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**Author:** [@eeidson](https://discourse.openondemand.org/u/eeidson)\
**Replies:** 2\
**Last updated:** [August 21, 2026, 9:17pm UTC](https://discourse.openondemand.org/t/problem-changing-job-script-in-job-composer-job-options/4958 "2026-08-21T21:17:40Z")

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I’m having trouble changing the job script in Job Composer. I select the job I want to modify, go to Job Options, make changes in the pop-up, and press Save, and any changes I make work EXCEPT for changing the Job Scrip…

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## [Navbar: controlling the "Interactive Apps" and (pinned-) "Apps" menus?](https://discourse.openondemand.org/t/navbar-controlling-the-interactive-apps-and-pinned-apps-menus/4957)

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**Author:** [@jasonbuechler](https://discourse.openondemand.org/u/jasonbuechler)\
**Replies:** 2\
**Last updated:** [August 21, 2026, 9:13pm UTC](https://discourse.openondemand.org/t/navbar-controlling-the-interactive-apps-and-pinned-apps-menus/4957 "2026-08-21T21:13:19Z")

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I think I have answered myself below (for the most part) but figured I would ask in case I’m missing anything. There are pieces of this information throughout the Customization and ondemand.d-yamls docs but a lot of ski…

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## [Launching both a GUI and a WebUI app via same OOD interactive app](https://discourse.openondemand.org/t/launching-both-a-gui-and-a-webui-app-via-same-ood-interactive-app/4955)

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**Author:** [@ssivy](https://discourse.openondemand.org/u/ssivy)\
**Replies:** 1\
**Last updated:** [August 20, 2026, 5:52pm UTC](https://discourse.openondemand.org/t/launching-both-a-gui-and-a-webui-app-via-same-ood-interactive-app/4955 "2026-08-20T17:52:38Z")

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I’m looking to create an OOD interactive app that combines using both an GUI (X app via VNC) and a webUI app (e.g. Jupyter notebook) at the same time. I know I can just run Firefox in the GUI and have it there, but my us…

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## [Xfce issues on Rocky Linux 9](https://discourse.openondemand.org/t/xfce-issues-on-rocky-linux-9/4953)

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**Author:** [@jcreech](https://discourse.openondemand.org/u/jcreech)\
**Replies:** 6\
**Last updated:** [August 19, 2026, 7:20pm UTC](https://discourse.openondemand.org/t/xfce-issues-on-rocky-linux-9/4953 "2026-08-19T19:20:08Z")

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We have discovered some issues with Xfce desktop on Rocky Linux 9 nodes. It seems to be pretty consistent on the nodes that run RL9, whereas our Rocky Linux 8 nodes work fine. Other apps, such as Jupyter, work fine on th…

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## [Update and upgrade](https://discourse.openondemand.org/t/update-and-upgrade/4950)

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**Author:** [@as7a5](https://discourse.openondemand.org/u/as7a5)\
**Replies:** 1\
**Last updated:** [August 17, 2026, 8:27pm UTC](https://discourse.openondemand.org/t/update-and-upgrade/4950 "2026-08-17T20:27:15Z")

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Hi, we have an instance of OOD that needs to be updated and upgraded. also the job composer fails. The installation and configuration was done by another team member that has left the organization. I can troubleshoot da…

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## [/var/tmp/httpd-logs is chewing up storage due to health checks](https://discourse.openondemand.org/t/var-tmp-httpd-logs-is-chewing-up-storage-due-to-health-checks/4938)

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**Author:** [@robert\_freeman](https://discourse.openondemand.org/u/robert_freeman)\
**Replies:** 4\
**Last updated:** [August 12, 2026, 5:08pm UTC](https://discourse.openondemand.org/t/var-tmp-httpd-logs-is-chewing-up-storage-due-to-health-checks/4938 "2026-08-12T17:08:43Z")

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Greetings. Please forgive any newbie-posting errors. We recently discovered that our httpd log directory is filling up due to entries (in both error and access logs) for healthchecker entries: we are in AWS and an ELB h…

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## [Config recently\_used\_apps widget to NOT skip form?](https://discourse.openondemand.org/t/config-recently-used-apps-widget-to-not-skip-form/4935)

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**Author:** [@jasonbuechler](https://discourse.openondemand.org/u/jasonbuechler)\
**Replies:** 4\
**Last updated:** [August 6, 2026, 6:11pm UTC](https://discourse.openondemand.org/t/config-recently-used-apps-widget-to-not-skip-form/4935 "2026-08-06T18:11:42Z")

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I’d like to use the recently\_used\_apps widget but think I should only implement it if I can modify it so that the tiles link to the bespoke forms (instead of copying their last resource request). A large contingent of o…

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## [Form auto\_queues missing a partition](https://discourse.openondemand.org/t/form-auto-queues-missing-a-partition/3958)

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**Author:** [@hansen-m](https://discourse.openondemand.org/u/hansen-m)\
**Replies:** 9\
**Last updated:** [July 28, 2026, 6:36pm UTC](https://discourse.openondemand.org/t/form-auto-queues-missing-a-partition/3958 "2026-07-28T18:36:35Z")

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When using the auto\_queues field on our cluster one of our partitions is missing from the dropdown list and we aren’t exactly sure why since all the others appear correctly? We suspect it might have something to do with …

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## [Multiple Login Nodes Definition in One HPC Cluster](https://discourse.openondemand.org/t/multiple-login-nodes-definition-in-one-hpc-cluster/4931)

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**Author:** [@coengineer](https://discourse.openondemand.org/u/coengineer)\
**Replies:** 2\
**Last updated:** [July 23, 2026, 2:25pm UTC](https://discourse.openondemand.org/t/multiple-login-nodes-definition-in-one-hpc-cluster/4931 "2026-07-23T14:25:06Z")

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Hello everyone, I am trying to configure right now in one HPC ondemand cluster with multiple login nodes. if i configure the login nodes with shell access, then i have to define under cluster.d folder, but it makes als…

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## [Desktop changes for RHEL 9 to 10 migration](https://discourse.openondemand.org/t/desktop-changes-for-rhel-9-to-10-migration/4906)

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**Author:** [@milberg](https://discourse.openondemand.org/u/milberg)\
**Replies:** 7\
**Last updated:** [June 29, 2026, 11:20pm UTC](https://discourse.openondemand.org/t/desktop-changes-for-rhel-9-to-10-migration/4906 "2026-06-29T23:20:08Z")

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We have been using the XFCE desktop on RHEL 9 and are preparing to migrate our cluster to RHEL 10. Neither XFCE nor MATE are available on RHEL 10 and we’re looking for a lighter weight option than GNOME. Is there a rec…

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## [File App Umask Config](https://discourse.openondemand.org/t/file-app-umask-config/4915)

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**Author:** [@armiger729](https://discourse.openondemand.org/u/armiger729)\
**Replies:** 1\
**Last updated:** [June 26, 2026, 2:04pm UTC](https://discourse.openondemand.org/t/file-app-umask-config/4915 "2026-06-26T14:04:27Z")

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Hi there, I’m trying to figure out how to go about tweaking the default umask settings for files created within the Files App - it appears to be using a umask of 0022, which we’d like to change. Currently, we have the …

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## [Batch\_connect app with permission denied in generated slurm script while generating connect.yml file](https://discourse.openondemand.org/t/batch-connect-app-with-permission-denied-in-generated-slurm-script-while-generating-connect-yml-file/4905)

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**Author:** [@omar-valerio](https://discourse.openondemand.org/u/omar-valerio)\
**Replies:** 3\
**Last updated:** [June 25, 2026, 12:59pm UTC](https://discourse.openondemand.org/t/batch-connect-app-with-permission-denied-in-generated-slurm-script-while-generating-connect-yml-file/4905 "2026-06-25T12:59:04Z")

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Hello Team, I want to ask your help to understand/fix the following error. I’m setting up a batch\_connect app to configure and start a vLLM + OpenHands session in our local cluster. The error happens during the slurm …

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## [GPU hardware suggestion for interactive HPC using VirtualGL for apps and desktop](https://discourse.openondemand.org/t/gpu-hardware-suggestion-for-interactive-hpc-using-virtualgl-for-apps-and-desktop/4894)

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**Author:** [@Shadowphax](https://discourse.openondemand.org/u/Shadowphax)\
**Replies:** 3\
**Last updated:** [June 25, 2026, 6:33am UTC](https://discourse.openondemand.org/t/gpu-hardware-suggestion-for-interactive-hpc-using-virtualgl-for-apps-and-desktop/4894 "2026-06-25T06:33:16Z")

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Good day, I would appreciate any recommendations / suggestions for a data-center GPU card that works well with Open OnDemand for interactive use of HPC apps and desktop sessions. We currently making use of the Nvidia L4…

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## [Published passenger app doesn't appear in dropdown menus](https://discourse.openondemand.org/t/published-passenger-app-doesnt-appear-in-dropdown-menus/4901)

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**Author:** [@RonRahaman](https://discourse.openondemand.org/u/RonRahaman)\
**Replies:** 8\
**Last updated:** [June 22, 2026, 2:06pm UTC](https://discourse.openondemand.org/t/published-passenger-app-doesnt-appear-in-dropdown-menus/4901 "2026-06-22T14:06:07Z")

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Hi all, I’m trying to publish a passenger app at our site for the first time, but it is not appearing on the dropdown on the top menu bar as I expect. Any tips on debugging this? I’m following the Python tutorial, and…

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## [RFC: rustdesk as novnc and vnc alternative?](https://discourse.openondemand.org/t/rfc-rustdesk-as-novnc-and-vnc-alternative/4676)

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**Author:** [@jose-d](https://discourse.openondemand.org/u/jose-d)\
**Replies:** 7\
**Last updated:** [June 22, 2026, 12:01pm UTC](https://discourse.openondemand.org/t/rfc-rustdesk-as-novnc-and-vnc-alternative/4676 "2026-06-22T12:01:26Z")

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I noticed that RustDesk is an actively developed remote desktop solution, and I was wondering whether anyone has considered integrating it as an alternative to the websocket-based VNC approach in Open OnDemand.. (contex…

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## [\[Hybrid - cloud brusting\] OOD + Slurm + AWS](https://discourse.openondemand.org/t/hybrid-cloud-brusting-ood-slurm-aws/4903)

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**Author:** [@trongdv](https://discourse.openondemand.org/u/trongdv)\
**Replies:** 3\
**Last updated:** [June 15, 2026, 6:32pm UTC](https://discourse.openondemand.org/t/hybrid-cloud-brusting-ood-slurm-aws/4903 "2026-06-15T18:32:41Z")

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Hello everyone, I’m building a hybrid system using OOD + Slurm that will spin up EC2 instances when jobs are submitted. Normally, on-premises servers share data via NFS, but using NFS over a Site-to-Site VPN is extremely…

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## [System-status not working after upgrade to 4.1.1](https://discourse.openondemand.org/t/system-status-not-working-after-upgrade-to-4-1-1/4753)

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**Author:** [@statiksof](https://discourse.openondemand.org/u/statiksof)\
**Replies:** 10\
**Last updated:** [June 3, 2026, 10:26pm UTC](https://discourse.openondemand.org/t/system-status-not-working-after-upgrade-to-4-1-1/4753 "2026-06-03T22:26:59Z")

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Hi, I just upgraded ondemand to 4.1.1. without errors. system-status (slurm cluster) is not working anymore. it is stuck on \`loading\`. in the console log: Failed to load resource: the server responded with a status of…

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## [GOOD26 slide decks](https://discourse.openondemand.org/t/good26-slide-decks/4884)

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**Author:** [@emily.dragowsky](https://discourse.openondemand.org/u/emily.dragowsky)\
**Replies:** 3\
**Last updated:** [May 13, 2026, 4:12pm UTC](https://discourse.openondemand.org/t/good26-slide-decks/4884 "2026-05-13T16:12:13Z")

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I’ve been reviewing videos from GOOD26, but have not managed to find the location of slides from talks. Were all/any slide decks shared? Thanks!

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## [Error -- invalid byte sequence in US-ASCII](https://discourse.openondemand.org/t/error-invalid-byte-sequence-in-us-ascii/4697)

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**Author:** [@lilianna](https://discourse.openondemand.org/u/lilianna)\
**Replies:** 10\
**Last updated:** [May 11, 2026, 9:39am UTC](https://discourse.openondemand.org/t/error-invalid-byte-sequence-in-us-ascii/4697 "2026-05-11T09:39:20Z")

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Hi, Thank you very much for you help. One of our user (and only one user) has a problem to open OnDemand on his laptop. He even does not see the login page and I can not see logs on the cluster. He get an error (his AD …

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## [Various Selinux errors in journalctld on RHEL 10.1](https://discourse.openondemand.org/t/various-selinux-errors-in-journalctld-on-rhel-10-1/4874)

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**Author:** [@timeu](https://discourse.openondemand.org/u/timeu)\
**Replies:** 1\
**Last updated:** [May 1, 2026, 8:44pm UTC](https://discourse.openondemand.org/t/various-selinux-errors-in-journalctld-on-rhel-10-1/4874 "2026-05-01T20:44:35Z")

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I installed OpenOnDemand 4.1.4 on a RHEL 10.1 host with enforcing Selinux. I have set setsebool ondemand\_use\_slurm on When I try to submit a job I get following error: An error occurred when submitting jobs for simulat…

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## [Ood v4.1.1, Shell Access failed to launch](https://discourse.openondemand.org/t/ood-v4-1-1-shell-access-failed-to-launch/4770)

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**Author:** [@hpc4you](https://discourse.openondemand.org/u/hpc4you)\
**Replies:** 6\
**Last updated:** [April 30, 2026, 8:14am UTC](https://discourse.openondemand.org/t/ood-v4-1-1-shell-access-failed-to-launch/4770 "2026-04-30T08:14:27Z")

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OS: Rocky Linux release 10.1 (Red Quartz) ood: 4.1.1 Click the menu: Clusters: Shell Access, got the error. The web page says: We’re sorry, but something went wrong. Here is the related log file, the last 20 lines. …

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## [Web based SQL workbench application for AWS Athena with temporary credentials](https://discourse.openondemand.org/t/web-based-sql-workbench-application-for-aws-athena-with-temporary-credentials/4836)

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**Author:** [@keloconnor](https://discourse.openondemand.org/u/keloconnor)\
**Replies:** 0\
**Last updated:** [April 28, 2026, 2:19pm UTC](https://discourse.openondemand.org/t/web-based-sql-workbench-application-for-aws-athena-with-temporary-credentials/4836 "2026-04-28T14:19:27Z")

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I help administer an OOD environment and was curious if anyone knew of a tool or application that could work as a web based SQL workbench environment for AWS Athena. I have briefly looked at Cloudbeaver’s community edit…

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## [Developing dashboard plugins](https://discourse.openondemand.org/t/developing-dashboard-plugins/4709)

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**Author:** [@grvlbit](https://discourse.openondemand.org/u/grvlbit)\
**Replies:** 7\
**Last updated:** [April 14, 2026, 3:45pm UTC](https://discourse.openondemand.org/t/developing-dashboard-plugins/4709 "2026-04-14T15:45:37Z")

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I am currently developing a few small dashboard plugins for our OOD instance. The main idea is to natively show the user some information on their account quota and system metrics on the dashboard. I have read through t…

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