[slurm-users] slurm job_container/tmpfs

Tue Nov 21 13:07:06 UTC 2023

Thanks Sean. I've tried using slurm prolog/epilog scripts but without any success. That's why I decided to look for other solutions and job_container/tmpfs plugin seemed like a good alternative.

De: slurm-users <slurm-users-bounces at lists.schedmd.com> En nombre de Sean Mc Grath
Enviado el: martes, 21 de noviembre de 2023 12:57
Para: Slurm User Community List <slurm-users at lists.schedmd.com>
Asunto: Re: [slurm-users] slurm job_container/tmpfs

ATENCIÓN: Este correo electrónico se envió desde fuera de la UAH. No haga clic en enlaces ni abra archivos adjuntos a menos que reconozca al remitente y sepa que el contenido es seguro.
Would a prolog script, https://slurm.schedmd.com/prolog_epilog.html, do what you need? Sorry if you have already considered that and I missed it.

---
Sean McGrath
Senior Systems Administrator, IT Services

________________________________
From: slurm-users <slurm-users-bounces at lists.schedmd.com<mailto:slurm-users-bounces at lists.schedmd.com>> on behalf of Arsene Marian Alain <alain.arsene at uah.es<mailto:alain.arsene at uah.es>>
Sent: Tuesday 21 November 2023 09:58
To: Slurm User Community List <slurm-users at lists.schedmd.com<mailto:slurm-users at lists.schedmd.com>>
Subject: Re: [slurm-users] slurm job_container/tmpfs

Hello Brian,

Thanks for your answer. With the job_container/tmpfs plugin I don't really create the directory manually.

I just give my Basepath=/scratch (a local directory for each node that is already mounted with 1777 permissions) in job_container.conf. The plugin automatically generates for each job a directory with the "JOB_ID", for example: /scratch/1805

The only problem is that directory 1805 is generated with root owner and permissions 700. So the user who submitted the job cannot write/read inside directory 1805.

Is there a way for the owner of directory 1805 to be the user who submitted the job and not root?

De: slurm-users <slurm-users-bounces at lists.schedmd.com<mailto:slurm-users-bounces at lists.schedmd.com>> En nombre de Brian Andrus
Enviado el: lunes, 20 de noviembre de 2023 23:29
Para: slurm-users at lists.schedmd.com<mailto:slurm-users at lists.schedmd.com>
Asunto: Re: [slurm-users] slurm job_container/tmpfs

ATENCIÓN: Este correo electrónico se envió desde fuera de la UAH. No haga clic en enlaces ni abra archivos adjuntos a menos que reconozca al remitente y sepa que el contenido es seguro.

How do you 'manually create a directory'? That would be when the ownership of root would be occurring. After creating it, you can chown/chmod it as well.

Brian Andrus

On 11/18/2023 7:35 AM, Arsene Marian Alain wrote:

Dear slurm community,

I run slurm 21.08.1 under Rocky Linux 8.5 on my small HPC cluster and am trying to configure job_container/tmpfs to manage the temporary directories.

I have a shared nfs drive "/home" and a local "/scratch" (with permissions 1777) on each node.

For each submitted job I manually create a directory with the "JOB_ID.$USER" in the local "/scratch" which is where all the temp files for the job will be generated. Now, I would like to do these automatically (especially to remove the directory when the job finishes or is canceled):

I added the following parameters in my /etc/slurm.conf:

JobContainerType=job_container/tmpfs

PrologFlags=contain

So, I have created the "job_container.conf" in the directory "/etc/slurm"

with the following configuration:

AutoBasePath=false

BasePath=/scratch

Then, I replicated the changes to all nodes and restarted the slurm daemons.

Finally, when I launch the job a directory with the "JOB_ID" is created in the local "/scratch" of the compute node. The only problem is that the owner of the directory is "root" and the user who submitted the job doesn't have read and write permissions to that directory (other users do not either).

I would like that:

1) The name of the automatically created directory will be: "JOB_ID.$USER"

2) The owner of the directory will be the user who submitted the job, not "root".

Please, could someone help me?

Thanks a lot.

Best regards,

Alain
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