Notes on Building a Raspberry Pi Kubernetes Cluster (Part 1: The Hardware)

The Hardware

Parts and price list for an 8–way Raspberry Pi 4 cluster, Feb 2021
The shelf is on top for easy access to the switch, but this rack just takes minutes to rearrange!
The PoE hats aren’t here yet, but when they are, CAT-6 cables will be the only connections to most of the Pis.
Messy but working, here I have 2 8GB, one 4GB, and one 2GB Pi 4s, all USB-powered (no PoE hats yet), and a portable hard drive.
The bottom side of a PoE hat
One rail filled with Pis, with PoE hats installed on the top three. Note how the screws mounting the boards to the rail prevent use of two of the standoffs that came with the PoE hats.



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