Configuring a compute node

This is a step by step guide on how to set up a miniHPC using Raspberry Pis.

Flash an SD card as described in episode 2 and give it a name of «nodename»002 where «nodename» is the name that you use for all your nodes in your HPC.

Run and update and an upgrade

sudo apt update -y
sudo apt full-upgrade -y

Disable WiFi and Bluetooth

Open /boot/firmware/config.txt and add the following two lines at the bottom in the [all] section.

dtoverlay=disable-wifi
dtoverlay=disable-bt

Save the file and reboot

Create a mount point for the shared drive

sudo mkdir /sharedfs

Install required packages

sudo apt-get install -y slurmd slurm-client munge vim ntp ntpdate

• Copy the /etc/hosts from the login node to the compute node
• Copy the slurm config of the login node to /etc/slurm/slurm.conf
• Copy the /etc/munge/munge.key from the login node to the compute node
• Copy the /etc/cgroup.conf and /etc/cgroup_allowed_devices_file.conf from the login node to the compute node
• Update /etc/fstab to show the following:

proc            /proc           proc    defaults          0       0
PARTUUID=3e3e7392-01  /boot/firmware  vfat    defaults          0       2
PARTUUID=3e3e7392-02  /               ext4    defaults,noatime  0       1
192.168.5.101:/sharedfs    /sharedfs    nfs    defaults   0 0
192.168.5.101:/home    /home    nfs    defaults   0 0

Install ESSI

mkdir essi
cd essi
wget https://raw.githubusercontent.com/EESSI/eessi-demo/main/scripts/install_cvmfs_eessi.sh
sudo bash ./install_cvmfs_eessi.sh
echo "source /cvmfs/software.eessi.io/versions/2023.06/init/bash" | sudo tee -a /etc/profile