ckandoth/single_machine_slurm_on_ubuntu.md

## single_machine_slurm_on_ubuntu.md

      
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              single_machine_slurm_on_ubuntu.md
            
          
    Use apt to install the necessary packages:
sudo apt install -y slurm-wlm slurm-wlm-doc

Load file:///usr/share/doc/slurm-wlm/html/configurator.html in a browser (or file://wsl%24/Ubuntu/usr/share/doc/slurm-wlm/html/configurator.html on WSL2), and:

Set your machine's hostname in SlurmctldHost and NodeName.
Set CPUs as appropriate, and optionally Sockets, CoresPerSocket, and ThreadsPerCore. Use command lscpu to find what you have.
Set RealMemory to the number of megabytes you want to allocate to Slurm jobs,
Set StateSaveLocation to /var/spool/slurm-llnl.
Set ProctrackType to linuxproc because processes are less likely to escape Slurm control on a single machine config.
Make sure SelectType is set to Cons_res, and set SelectTypeParameters to CR_Core_Memory.
Set JobAcctGatherType to Linux to gather resource use per job, and set AccountingStorageType to FileTxt.

Hit Submit, and save the resulting text into /etc/slurm-llnl/slurm.conf i.e. the configuration file referred to in /lib/systemd/system/slurmctld.service and /lib/systemd/system/slurmd.service.
Load /etc/slurm-llnl/slurm.conf in a text editor, uncomment DefMemPerCPU, and set it to 8192 or whatever number of megabytes you want each job to request if not explicitly requested using --mem during job submission. Read the docs and edit other defaults as you see fit.
Create /var/spool/slurm-llnl and /var/log/slurm_jobacct.log, then set ownership appropriately:
sudo mkdir -p /var/spool/slurm-llnl
sudo touch /var/log/slurm_jobacct.log
sudo chown slurm:slurm /var/spool/slurm-llnl /var/log/slurm_jobacct.log

Install mailutils so that Slurm won't complain about /bin/mail missing:
sudo apt install -y mailutils

Make sure munge is installed and running, and a munge.key was created with user-only read-only permissions, owned by munge:munge:
sudo service munge start
sudo ls -l /etc/munge/munge.key

Start services slurmctld and slurmd:
sudo service slurmd start
sudo service slurmctld start