[slurm-users] enforce Qos to users

Hello everyone,

I'm trying to use QoS to enforce resource limits on an association, but I'm having trouble with proper enforcement.

I created a QoS with resource limits: ``` sacctmgr add qos qos_gpus flags=denyonlimit,overpartqos maxjobsperuser=4 maxtresperjob=gres/gpu=1 ```

Then I assigned it to an account: ``` sacctmgr modify account name=account-a set qos=qos_gpus defaultqos=qos_gpus systemctl restart slurmctld ```

Users in this account can bypass the QoS limits by explicitly specifying a different QoS when submitting jobs: ``` srun --qos=(normal|qos_gpus) ... ```

Even though I set `defaultqos=qos_gpus`, users can still choose any available QoS and bypass the intended resource limits.

My question is: How can I restrict users to only using their assigned QoS and prevent them from specifying other QoS options? Is there a configuration I'm missing to enforce QoS restrictions properly?

Best,

--- info about my setup slurm version : tested on 23.11.4 and 23.02.7 AccountingStorageEnforce = associations,limits EnforcePartLimits = ALL