How I set up a simple Raspberry Pi cluster using microk8s

After endlessly surfing through docs and youtube videos I was able to set up my pis to build a cluster! This is exactly how I did it

Requirements

• At least 2 raspberry pis with an OS and ssh enabled connected on the same network
  • I strongly recommend raspberrypi lite, it's simple and made for the pi
  • I used 1 raspberry pi 5 8gb and 2 raspberry pi 3b+
• that's it.

Why microk8s?

• Light-weight: 40% the amount of memory usage when compared to standard kubernetes
• Supports ARM by default(the architecture all pis run)
• Easy to use, and extremely convenient to connect worker nodes

On each node

• Install snapd

  $ sudo apt update
  $ sudo apt upgrade -y
  $ sudo apt install snapd -y

• Install microk8s via snapd

  $ sudo snap install microk8s --classic --channel=1.23/stable

• Run microk8s as sudo by default

  $ sudo usermod -a -G microk8s $USER
  $ sudo chown -f -R $USER ~/.kube
  $ newgrp microk8s

On the master node

$ microk8s status --wait-ready
$ microk8s enable dns dashboard storage
$ microk8s add-node

This command will then proceed to output a command that looks like this

microk8s join <master-ip>:25000/<token>

On the worker node/(s)

Simply run

microk8s join <master-ip>:25000/<token>

Note: do not use the same command for more than one worker node

Done!

That's it, you now have your very own pi cluster! This is mine: