slurmd override ulimit settings are not applied

[jamesbeedy]

Bug Description

We create an override file for slurmd that sets the openfile setting to 1048576. For some reason, the openfile settings are not applied to processes spawned by slurmd.

To Reproduce

To reproduce, deploy the bundle below, and inspect ulimit -n once deployed.

$ srun -p slurmd --pty bash
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

ubuntu@juju-87c6ff-2:~$ ulimit -n
1024

Environment

slurm-charms deployed from edge using lxd provider and kvm virtual-machines

series: jammy
applications:
  mysql:
    charm: mysql
    channel: 8.0/edge
    num_units: 1
    to:
    - "0"
    storage:
      database: rootfs,1,1024M

  slurmctld:
    charm: slurmctld
    channel: edge
    num_units: 1
    to:
    - "1"

  slurmd:
    charm: slurmd
    channel: edge
    num_units: 1
    to:
    - "2"

  slurmdbd:
    charm: slurmdbd
    channel: edge
    num_units: 1
    to:
    - "3"

  slurmdbd-mysql-router:
    charm: mysql-router
    channel: dpe/edge
    num_units: 0

machines:
  "0":
    constraints: arch=amd64
  "1":
    constraints: arch=amd64 virt-type=virtual-machine
  "2":
    constraints: arch=amd64 virt-type=virtual-machine
  "3":
    constraints: arch=amd64 virt-type=virtual-machine
relations:
- - slurmdbd-mysql-router:backend-database
  - mysql:database
- - slurmdbd:database
  - slurmdbd-mysql-router:database
- - slurmctld:slurmd
  - slurmd:slurmctld
- - slurmctld:slurmdbd
  - slurmdbd:slurmctld

Relevant log output

n/a

Additional context

No response