[slurm-users] What is an easy way to prevent users run programs on the master/login node.

Marcus Wagner wagner at itc.rwth-aachen.de
Mon Apr 26 06:01:38 UTC 2021


we also have a wrapper script, together with a number of "MPI-Backends".
If mpiexec is called on the login nodes, only the first process is started on the login node, the rest runs on the MPI backends.


Am 25.04.2021 um 09:46 schrieb Patrick Begou:
> Hi,
> I also saw a cluster setup where mpirun or mpiexec commands were
> replaced by a shell script just saying "please use srun or sbatch...".
> Patrick
> Le 24/04/2021 à 10:03, Ole Holm Nielsen a écrit :
>> On 24-04-2021 04:37, Cristóbal Navarro wrote:
>>> Hi Community,
>>> I have a set of users still not so familiar with slurm, and yesterday
>>> they bypassed srun/sbatch and just ran their CPU program directly on
>>> the head/login node thinking it would still run on the compute node.
>>> I am aware that I will need to teach them some basic usage, but in
>>> the meanwhile, how have you solved this type of user-behavior
>>> problem? Is there a preffered way to restrict the master/login
>>> resources, or actions,  to the regular users ?
>> We restrict user limits in /etc/security/limits.conf so users can't
>> run very long or very big tasks on the login nodes:
>> # Normal user limits
>> *               hard    cpu             20
>> *               hard    rss             50000000
>> *               hard    data            50000000
>> *               soft    stack           40000000
>> *               hard    stack           50000000
>> *               hard    nproc           250
>> /Ole

Dipl.-Inf. Marcus Wagner

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