Raspberry Pi Kubernetes Cluster

While self-hosting and homelab setups have become increasingly popular, I decided I wanted to build my own Kubernetes cluster from scratch to understand container orchestration at a deeper level. Though I had experience with software development, I had never worked with infrastructure as code or bare metal hardware before.

I discovered that building a Raspberry Pi cluster with PoE hats was a hands-on way to learn about distributed systems, persistent storage solutions like Longhorn, and ingress controllers, leading me down a path of infrastructure management that now extends to hosting my own projects with proper SSL certificates and redundant storage.

project revive 2024

• software
  • persistent volumes (ssd 512gb + 2tb usb hdd redundancy?)
    • blog: https://hashbang.nl/blog/installing-longhorn-for-persistent-replicated-storage-on-raspberry-pi-kubernetes-cluster
  • infrastructure as code
• hardware
  • disconnect umbrel from Poe box / din rail
  • disconnect raspbeep from Poe / din rail
  • install separate rail for raspbeep + umbrel
  • research versions libreelec / raspbeep / umbrel
  • restore raspcontrol raspbravo
  • connect umbrel to ups power
• projects to run
  • recordfairs.hashbang.nl
• ingress / nginx
  • multiple ssl

guides

• Reboot pi k8s cluster https://github.com/ljfranklin/k8s-pi
• more up to date: k3s https://k3s.io

components

• Raspberrypi 4
• Poe hat
  https://www.sossolutions.nl/raspberry-pi-poe-hat-voor-raspberry-pi-model-3b?gclid=EAIaIQobChMIypvby5PH6QIV1eN3Ch0YewmoEAQYAyABEgKJqvD_BwE
• DIN rail
  • Lengte91 mmBreedte72 mmHoogte63 mm
  • https://www.conrad.nl/p/joy-it-rb-case-07-sbc-behuizing-geschikt-voor-raspberry-pi-voor-din-railmontage-grijs-1436758
  • https://www.amazon.de/GeeekPi-Rahmen-f%C3%BCr-Raspberry-Schiene/dp/B083B93PPM/ref=sr_1_2?crid=2U36U8Q1WAR98&dchild=1&keywords=raspberyy+pi+4+DIN&qid=1590142895&quartzVehicle=812-409&replacementKeywords=raspberyy+pi+din&sprefix=raspbery%2Caps%2C187&sr=8-2

settings

https://itnext.io/building-a-kubernetes-cluster-on-raspberry-pi-and-low-end-equipment-part-1-a768359fbba3

poe fan settings

bloggedabout it: [https://hashbang.nl/blog/kubernetes-cluster-build-with-raspberry-pi-and-poe-hats] /boot/firmware/usrconfig.txt

dtparam=rpi-poe,poe_fan_temp0=10000,poe_fan_temp0_hyst=1000  
dtparam=rpi-poe,poe_fan_temp1=55000,poe_fan_temp1_hyst=5000  
dtparam=rpi-poe,poe_fan_temp2=60000,poe_fan_temp1_hyst=5000  
dtparam=rpi-poe,poe_fan_temp3=65000,poe_fan_temp1_hyst=5000  
dtparam=rpi-poe,poe_fan_temp4=70000,poe_fan_temp1_hyst=5000