Basic Bramble

This repo will help you setup a basic Kubernetes cluster using Raspberry Pis

Flashing SD cards

1. Get 2 or more Raspberry Pi 4's plus SD cards (I went with 32GB)
2. Download "raspbian buster lite" image: https://www.raspberrypi.org/downloads/raspbian/
3. Flash each of your cards
4. Copy the contents of setup-files onto the "boot" partition of the SD card, which should be mounted on your machine. (this includes a folder of scripts and a file called ssh which enables you to ssh in without needing a monitor/keyboard etc.)
5. Copy script folder from this repo to boot partition
6. Put cards in Pis

Master setup

1. Power on first pi (we do one by one so we can figure out IPs)
2. Figure out the IP - your router or some IP scanner software can help
3. ssh in using username pi and password raspberry
4. Note you need to think about your IP addresses, I used my router to assign IP's based on mac-address - you may wish to make them static - if so see /boot/scripts/set-ip.sh
5. Run /boot/scripts/init-master.sh
6. Copy contents of /etc/kubernetes/admin.conf to your local machine as $HOME/.kube/config

Nodes setup

1. Power on another pi (we do one by one so we can figure out IPs)
2. Figure out the IP - your router or some IP scanner software can help
3. ssh in using username pi and password raspberry
4. Run sudo echo "192.168.1.39 master1.kube.local" >> /etc/hosts - substitute the IP address with your master node IP
5. Run /boot/scripts/init-node.sh node1 (change node number as you do each one)
6. Repeat for each node

Finishing off

Reboot all the Pis as some changes need this