Project: Kubernetes cluster using Raspberry Pi 4

⚠️ I am still working on this project. I'll release the services as soon as it's done

Index

• Hardware
• Diagram
• Requirements
• Setting up
  • Ip Address
  • Ansible hosts file
  • Group Vars
• Services
• Deploy
• Images

Hardware

• 3 Raspberry Pi 4, 4Gb each
• 1 Raspberry Pi 4, 8Gb
• 4 Micro SDXC SanDisk 128Gb each (64Gb will be enough as well)
• 4 Cables Ugreen USB C to USB A
• 1 Micro-HDMI to standard HDMI
• 1 GeeekPi Rack Tower 4 Layer Acrylic Cluster Case Large Cooling Fan LED RGB Light.
• 1 Anker 60W 6-Port USB Wall Charger, amazon link

Diagram

Requirements

1. The first step is to install the OS, for this project I'd choose Ubuntu Server 20.04.3 LTS. Step by step is here.

2. Install Ansible on your local computer.

3. Install sshpass on MAC

brew install hudochenkov/sshpass/sshpass

Setting up

Ip Address

As specified on the official documentation, we can set up the wifi connection by modifying the file network-config.

Cluster IP addresses.

Hostname	IP Address
rpi-k8s-master	192.168.1.123
rpi-k8s-node-1	192.168.1.164
rpi-k8s-node-2	192.168.1.111
rpi-k8s-storage	192.168.1.175

Also, as I set up the Rpi to not use a static IP address, once the devices got the respective IPs, I bound this to each respective MAC Address on my router.

Ansible hosts file

The Inventory hosts file needs to be updated with the Rpi Ip address.

The file is located at /inventory/hosts

[all:vars]
ansible_connection=ssh
ansible_user=ubuntu
ansible_ssh_pass=Y8WJq84Y #your ubuntu password

[master]
rpi-k8s-master  ansible_host=192.168.1.123

[nodes]
rpi-k8s-node-1  ansible_host=192.168.1.164
rpi-k8s-node-2  ansible_host=192.168.1.111

[storage]
rpi-k8s-storage  ansible_host=192.168.1.175

Group Vars

This file contains information to be used on K8s services. Update it accordingly.

IpAddress:
  k8s_master: 192.168.1.123
  k8s_node_1: 192.168.1.164
  k8s_node_2: 192.168.1.111
  k8s_storage: 192.168.1.175

K8s:
  cluster_name: cluster-rpi-lessandro
  podSubnet: "10.244.0.0/16"
  version: 1.22.0-00 #Kubernetes version to be installed

AWS:
  HOSTED_ZONE_ID: ABCDE #Your Route53 Zone Id - K8s Dynamic DNS Services
  VPN_NAME: example.com #Your public record - K8s Dynamic DNS Services
  default_region: ap-southeast-2 #Your default AWS Region

Applications

⚠️ Make sure you read the documentation before deploying the applications.

Name	URL	Username	Password	Documentation
Linkerd	http://192.168.1.164:32100	N/A	N/A	link
Kubernetes Dashboard	https://192.168.1.164:32200	N/A	N/A	link
Dynamic DNS	N/A	N/A	N/A	link
Wireguard	N/A	N/A	N/A	link
NFS Server	N/A	N/A	N/A	link
Jenkins & Trivy	http://192.168.1.164:32000	admin	P@ssw0rd	link
Pi-hole	http://192.168.1.164:8000	admin		link
Grafana	http://192.168.1.164:32000	admin	admin	link
Prometheus	http://192.168.1.164:32090	N/A	N/A	link
Alertmanager	http://192.168.1.164:32093	N/A	N/A	link

Deploy

Run the below Ansible playbook command.

ansible-playbook deploy

It'll deploy the services and applications specified on deploy.yml file.

Images

Raspberry Pi

Case