On further inspection I found:

slurmd: debug3: Trying to load plugin /usr/lib64/slurm/cgroup_v2.so

slurmd: debug4: /usr/lib64/slurm/cgroup_v2.so: Does not exist or not a regular file.

Which didn’t exist. So I created the cgroup.conf file:

x8000c0s0b0n0:/etc/slurm # cat cgroup.conf

CgroupPlugin=cgroup/v1

ConstrainCores=yes

ConstrainRAMSpace=yes

AllowedRAMSpace=95

then

mkdir -p /sys/fs/cgroup/freezer

mount -t cgroup -o freezer cgroup /sys/fs/cgroup/freezer

now slurmd can start.

- Jordan

From: Webb, Jordan via slurm-users <slurm-users@lists.schedmd.com>
Date: Monday, January 20, 2025 at 3:59 PM
To: slurm-users@schedmd.com <slurm-users@schedmd.com>
Subject: [EXTERNAL] [slurm-users] Slurmd cannot find cgroup plugin

Hi all, When trying to start slurmd, it is failing with cgroup issues. Any suggestions on where to troubleshoot this issue? x8000c0s0b0n0: ~ # slurmd -V slurm 24. 11. 0 x8000c0s0b0n0: ~ # slurmd -D -vvv slurmd: debug: Log file re-opened slurmd: 

Hi all,

When trying to start slurmd, it is failing with cgroup issues. Any suggestions on where to troubleshoot this issue?

x8000c0s0b0n0:~ # slurmd -V

slurm 24.11.0

x8000c0s0b0n0:~ # slurmd -D -vvv

slurmd: debug:  Log file re-opened

slurmd: debug2: hwloc_topology_init

slurmd: debug2: hwloc_topology_load

slurmd: debug2: hwloc_topology_export_xml

slurmd: debug:  CPUs:288 Boards:1 Sockets:4 CoresPerSocket:72 ThreadsPerCore:1

slurmd: error: Couldn't find the specified plugin name for cgroup/v2 looking at all files

slurmd: error: cannot find cgroup plugin for cgroup/v2

slurmd: error: cannot create cgroup context for cgroup/v2

slurmd: error: Unable to initialize cgroup plugin

slurmd: error: slurmd initialization failed

x8000c0s0b0n0:~ # mount | grep cgroup

cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate,memory_recursiveprot)

x8000c0s0b0n0:~ # grep cgroup /etc/slurm/slurm.conf

ProctrackType=proctrack/cgroup

TaskPlugin=task/affinity,task/cgroup

Thanks!

Jordan