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Preparing the Raspberry Pi

Feel free to skip this section, if you already have a Ubuntu Server powered machine in your homelab. This section will be a brief walk through the process of preparing a Raspberry Pi before installing microk8s.

Pre-requisites

Hardware

  • Raspberry Pi 4 Model B (8 GB RAM recommended)
  • Raspberry Pi Power Supply & Ethernet Cable
  • Micro SD Card & SD Card Reader

Software

Flash the Micro SD Card

  • Download and run the Raspberry Pi Imager, choose your correct Raspberry Pi Device and select the Micro SD card that is connected to your machine
  • For the Operating System use: Other general-purpose OS > Ubuntu > Ubuntu Server 22.04.3 LTS (64-bit)
  • Flash it ⚡

Prepare for MicroK8s

  • SSH into your Raspberry Pi and enable c-groups so kubelet will work out of the box. To do so, configure the following configuration file:
sudo nano /boot/firmware/cmdline.txt
  • Add the following options: cgroup_enable=memory cgroup_memory=1
  • Save the file and reboot your Raspberry Pi
  • For Ubuntu Server image versions 21.10+, it is necessary to install to install extra kernel modules
sudo apt-get update
sudo apt install linux-modules-extra-raspi
  • Restart your Raspberry Pi once again

Next: install and configure microk8s