The K8S Cube runs on 16 Raspberry Pi single board computers. However, there are other considerations for networking, power, storage and casing that I want to go through here. Raspberries The Raspberries are a mix of models 3B+, 4B and there may be 1-2 Model 3 boards, too. BitScope Blade Rack Running up to 20 Raspberry Pis from 20 powerbricks is not a choice I wanted to make. Back in 2019 when I started my original project, I ordered a Blade Rack from the Australian company BitScope. Read more

Let’s go through some of the design principles for my refurbished cluster. I got the farm of Raspberries in early 2019 and I have been expanding a bit after that. I have had this setup running previously, so I am starting with some assumptions. These are not set in stone, but are supposed to limit my options to avoid wasting my time on trying to do everything. Avoid SD cards like the plague Ignore Wifi Run read-only Have a golden image Trust DHCP Boot from NFS All of these opinions are based on annoying stuff happening. Read more