[slurm-users] Problem with cgroup plugin in Ubuntu22.04 and slurm 21.08.5

[Angel de Vicente]

Hello,

I've installed Slurm in a workstation (this is a single-node install)
with Ubuntu 22.04, and have installed Slurm version 21.08.5 (I didn't
compile it myself, just installed it with "apt install").

In the slurm.conf file I have:

,----
| ProctrackType=proctrack/cgroup
| TaskPlugin=task/affinity,task/cgroup
`----

When I submit a job, the "slurmd.log" shows:

,----
| [2023-04-21T12:22:14.128] task/affinity: task_p_slurmd_batch_request: task_p_slurmd_batch_request: 127018
| [2023-04-21T12:22:14.128] task/affinity: batch_bind: job 127018 CPU input mask for node: 0x00000001
| [2023-04-21T12:22:14.129] task/affinity: batch_bind: job 127018 CPU final HW mask for node: 0x00000001
| [2023-04-21T12:22:14.156] [127018.extern] error: cgroup namespace 'cpuset' not mounted. aborting
| [2023-04-21T12:22:14.156] [127018.extern] error: unable to create cpuset cgroup namespace
| [2023-04-21T12:22:14.156] [127018.extern] error: cgroup namespace 'memory' not mounted. aborting
| [2023-04-21T12:22:14.156] [127018.extern] error: unable to create memory cgroup namespace
| [2023-04-21T12:22:14.156] [127018.extern] error: failure enabling memory enforcement: Unspecified error
| [2023-04-21T12:22:14.156] [127018.extern] error: Couldn't load specified plugin name for task/cgroup: Plugin init() callback failed
| [2023-04-21T12:22:14.156] [127018.extern] error: cannot create task context for task/cgroup
| [2023-04-21T12:22:14.156] [127018.extern] error: job_manager: exiting abnormally: Plugin initialization failed
`----

If I change TaskPlugin to be just

,----
| TaskPlugin=task/affinity
`----

then the job executes without any problems.

Do you know how I could fix this while keeping the cgroup plugin? My
intuition tells me that I should probably get the latest version of
Slurm and compile it myself, but I thought I would ask here before going
that route.

Any ideas/pointers? Many thanks,
-- 
Ángel de Vicente
 Research Software Engineer (Supercomputing and BigData)
 Tel.: +34 922-605-747
 Web.: http://research.iac.es/proyecto/polmag/

 GPG: 0x8BDC390B69033F52
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