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Not sure if this will help. It has which user will execute the scripts</div>
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<a href="https://slurm.schedmd.com/prolog_epilog.html" id="LPNoLPOWALinkPreview">https://slurm.schedmd.com/prolog_epilog.html</a><br>
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Maybe the variable isn't set for the user executing the prolog/epilog/taskprolog</div>
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Jeff</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> slurm-users <slurm-users-bounces@lists.schedmd.com> on behalf of Davide DelVento <davide.quantum@gmail.com><br>
<b>Sent:</b> Saturday, October 29, 2022 9:37 AM<br>
<b>To:</b> slurm-users@schedmd.com <slurm-users@schedmd.com><br>
<b>Subject:</b> [slurm-users] Prolog and job_submit</font>
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<div class="PlainText">My problem: grant licensed software availability to my users only if<br>
they request it on slurm; for now with local licenses.<br>
<br>
I wrote a job_submit lua script which checks job_desc.licenses and if<br>
it contains the appropriate strings it sets an appropriate<br>
SOMETHING_LICENSE_REQ environmental variable.<br>
<br>
This part works, I can see the environmental variable correctly set in<br>
the jobs that require the license.<br>
<br>
Now this licensed software is a bit tricky to manage, so the way that<br>
I thought to use it is simply to make its binary disappear from the<br>
nodes when not requested, with a prolog and epilog scripts which copy<br>
it from a location in the shared filesystem accessible only by root.<br>
Simply a copy during the prolog and a delete during the epilog.<br>
<br>
Something like this:<br>
<br>
if [[ $SOMETHING_LICENSE_REQ == 1 ]]; then<br>
# copy the binary<br>
fi<br>
<br>
After banging my head to make the prolog run (executable bit and full<br>
path required, and not said so in the documentation and error logs<br>
being cryptic about it) I am finally able to see it running.... only<br>
to find out that the SOMETHING_LICENSE_REQ environmental variable is<br>
not set, despite the documentation at<br>
<a href="https://urldefense.com/v3/__https://slurm.schedmd.com/prolog_epilog.html__;!!LkSTlj0I!GeYFMK5LTz38C-Y5efzywysYqnEPMq4Rq9Nj77WE3gOEYPJ-rRbnBR6alpC8cPi6XJbsBhkAgFOFbEIzzx4ItgH_Ssba$" data-auth="NotApplicable">https://urldefense.com/v3/__https://slurm.schedmd.com/prolog_epilog.html__;!!LkSTlj0I!GeYFMK5LTz38C-Y5efzywysYqnEPMq4Rq9Nj77WE3gOEYPJ-rRbnBR6alpC8cPi6XJbsBhkAgFOFbEIzzx4ItgH_Ssba$</a>
stating<br>
<br>
> The task prolog is executed with the same environment as the user tasks to be initiated.<br>
<br>
Now, I'd be very happy to do this copy from the job_submit, but that<br>
is run on the head node (I checked) and so I can't do that. It would<br>
seem strange that the job_submit is run after the prolog, since the<br>
latter runs on the compute node (I checked that too).<br>
<br>
Moreover, I also verified with additional environmental variables<br>
which I set at submit time are available for the user job correctly,<br>
but not in the prolog.<br>
<br>
So either I misinterpreted that "same environment as the user tasks"<br>
or there is something else that I am doing wrong.<br>
<br>
Does anybody have any insight?<br>
<br>
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