Install Guide (v2.3): Rocky 8.4/x86 64 + Warewulf + SLURM
3.4 Add resource management services on master node
OpenHPC provides multiple options for distributed resource management. The following command adds the
Slurm workload manager server components to the chosen master host. Note that client-side components
will be added to the corresponding compute image in a subsequent step.
# Install slurm server meta-package
[sms]# yum -y install ohpc-slurm-server
# Use ohpc-provided file for starting SLURM configuration
[sms]# cp /etc/slurm/slurm.conf.ohpc /etc/slurm/slurm.conf
# Identify resource manager hostname on master host
[sms]# perl -pi -e "s/ControlMachine=\S+/ControlMachine=${sms_name}/" /etc/slurm/slurm.conf
There are a wide variety of configuration options and plugins available for Slurm and the example config
file illustrated above targets a fairly basic installation. In particular, job completion data will be stored in a
text file (/var/log/slurm jobcomp.log) that can be used to log simple accounting information. Sites who
desire more detailed information, or want to aggregate accounting data from multiple clusters, will likely
want to enable the database accounting back-end. This requires a number of additional local modifications
(on top of installing slurm-slurmdbd-ohpc), and users are advised to consult the online documentation for
more detailed information on setting up a database configuration for Slurm.
Tip
SLURM requires enumeration of the physical hardware characteristics for compute nodes under its control.
In particular, three configuration parameters combine to define consumable compute resources: Sockets,
CoresPerSocket, and ThreadsPerCore. The default configuration file provided via OpenHPC assumes dual-
socket, 8 cores per socket, and two threads per core for this 4-node example. If this does not reflect your
local hardware, please update the configuration file at /etc/slurm/slurm.conf accordingly to match your
particular hardware. Note that the SLURM project provides an easy-to-use online configuration tool that
can be accessed here.
Other versions of this guide are available that describe installation of alternate resource management
systems, and they can be found in the docs-ohpc package.
3.5 Optionally add InfiniBand support services on master node
The following command adds OFED and PSM support using base distro-provided drivers to the chosen
master host.
[sms]# yum -y groupinstall "InfiniBand Support"
# Load IB drivers
[sms]# systemctl start rdma
Tip
InfiniBand networks require a subnet management service that can typically be run on either an
administrative node, or on the switch itself. The optimal placement and configuration of the subnet
manager is beyond the scope of this document, but Rocky 8.4 provides the opensm package should
you choose to run it on the master node.
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