Hello everyone,
thanks for all the answers.
To elaborate further: I'm developing in C, but that's not a problem
since I can find an equivalent to LUA as Jeffrey T Frey said.
One more thing I'd like to point out, is that I need to monitor jobs
going from pending to running state (after waiting in the jobs queue). I
currently have a separate pthread to achieve this, but I think at this
point the job_submit()/job_modify() function has already exited.
I do get the output of the slurm_kill_job() function when called, but
that's not useful for the user and I couldn't find a way to append
custom messages.
Again, thanks everyone who helped.
Regards,
Lorenzo
On 19/07/23 16:00, Jeffrey T Frey wrote:
In case you're developing the plugin in C and not LUA, behind the scenes the
LUA mechanism is concatenating all log_user() strings into a single variable
(user_msg). When the LUA code completes, the C code sets the *err_msg argument
to the job_submit()/job_modify() function to that string, then NULLs-out
user-msg. (There's a mutex around all of that code so slurmctld never executes
LUA job submit/modify scripts concurrently.) The slurmctld then communicates
that returned string back to sbatch/salloc/srun for display to the user.
Your C plugin would do likewise — set *err_msg before returning from
job_submit()/job_modify() — and needn't be mutex'ed if the code is reentrant.
On Jul 19, 2023, at 08:37, Angel de Vicente<angel.de.vice...@iac.es> wrote:
Hello Lorenzo,
Lorenzo Bosio<lorenzo.bo...@unito.it> writes:
I'm developing a job submit plugin to check if some conditions are met before a
job runs.
I'd need a way to notify the user about the plugin actions (i.e. why its jobs
was killed and what to do), but after a lot of research I could only write to
logs and not the user shell.
The user gets the output of slurm_kill_job but I can't find a way to add a
custom note.
Can anyone point me to the right api/function in the code?
In our "job_submit.lua" script we have the following for that purpose:
,----
| slurm.log_user("%s: WARNING: [...]", log_prefix)
`----
--
Ángel de Vicente
Research Software Engineer (Supercomputing and BigData)
Tel.: +34 922-605-747
Web.:http://research.iac.es/proyecto/polmag/
GPG: 0x8BDC390B69033F52
--
*/Dott. Mag. Lorenzo Bosio/*
Tecnico di Ricerca
Dipartimento di Informatica
Università degli Studi di Torino
Corso Svizzera, 185 - 10149 Torino
tel. +39 011 670 6836
