Set up node

Install new OS

Enable SSH

Execute:

sudo raspi-config

Enable SSH

![raspi-config_enable_ssh.png](raspi-config_enable_ssh.png){width=800}

Set static IP

sudo nano /etc/network/interfaces

Add the following

auto eth0
iface eth0 inet static
    address 192.168.0.52
    netmask 255.255.255.0
    routers 192.168.0.1
    donamin-name-servers 192.168.0.1

Reboot. From this point everything is done over SSH

sudo apt update
sudo apt full-upgrade

sudo nano /etc/hostname

Add

node1

Save and exit Edit the hosts file. If there are more nodes to be added then they can be added now

127.0.0.1       localhost
::1             localhost ip6-localhost ip6-loopback
ff02::1         ip6-allnodes
ff02::2         ip6-allrouters

#127.0.1.1               node1     
192.168.0.52            node1
192.168.0.51            master

Reboot Confirm Host name change

Install MPICH

sudo apt install mpich

Test MPICH

Create machinefile

nano machinefile

add one entry for master

node1

Test:

andrew@master:~ $ mpiexec -hostfile machinefile -n 4 hostname
node1
node1
node1
node1
andrew@master:~ $ 

Generate SSH keys

andrew@master:/ $ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/andrew/.ssh/id_rsa): 
Created directory '/home/andrew/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/andrew/.ssh/id_rsa
Your public key has been saved in /home/andrew/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:HRw29BTB7P4+ZpYTv/4cvTqNc3jPqz305lm0h7twtos andrew@master
The key's randomart image is:
+---[RSA 3072]----+
|         .=o+o   |
|         o =o    |
|          o..    |
|         . ..    |
|        S ..    .|
|            . .+o|
|            ..O*=|
|             XXXX|
|            EB##%|
+----[SHA256]-----+

Install pip

Pip is required to install Python libraries.

sudo apt install pip

You will probably receive a message referring to python-pip or python3-pip. Ignore these as the OS knows what it's doing.

Once pip is installed, mpi4py can be installed.

Install mpi4py

sudo pip install mpi4py

This will take a while. The action:

Building wheel for mpi4py (PEP 517)

will take several minutes to run during which time there will be no visible activity. The spinning "| / - \ |" sequence will stop as well. Just wait.

Done

Now it's time to configure the individual machines into a cluster.

Last modified: 22 April 2024