lucaslehnen / k8s-raspberry Goto Github PK

This repository contains the code for install and configure a Kubernetes cluster with kubeadm in 3 Raspberry's Pi 4 running under Ubuntu Server.

I'll presume that you use a linux. If you use another system, check the equivalent commands. You can contribute with this repo to add another distro...

You can see how install Ubuntu on Raspberry's here:

https://ubuntu.com/tutorials/how-to-install-ubuntu-on-your-raspberry-pi#1-overview

I use this image: https://ubuntu.com/download/raspberry-pi/thank-you?version=21.04&architecture=server-arm64+raspi

After burn Ubuntu image to SDCard, you can define a static ip address. Edit the network-config on the system-boot partition, like as:

version: 2
ethernets:
  eth0:
    dhcp4: false
    optional: true
    addresses:
      - 10.100.1.11/24 
    gateway4: 10.100.1.1
    nameservers:
      addresses: [8.8.8.8, 1.1.1.1]

Define the address and gateway4 as you prefer, but remember define the address different for each pi.

And you can configure a default password to SSH, creating a file ssh.txt on the boot partition. Use this password to connect after the boot.

Obs.: On first time you connect in the pi, you need change the password.

Also, I recommend to configure SSH access with SSH Keys to your raspberry's:

• Create a SSH key:

ssh-keygen -f ~/.ssh/rasps-k8s -C "Key for access raspberrys" -P ""

So, register your public SSH key in your raspberry's:

ssh-copy-id -i ~/.ssh/rasps-k8s.pub [email protected]

Test your SSH access in all nodes, no password will be required.

Next, i recommend you set hostname different to each Pi.

I prepared five roles:

• configure_node: Enable kernel modules, firewall rules and another linux changes.
• install_containerd: No Docker is required, just containerd. This role install it.
• install_k8s: Install k8s with kubeadm and Helm
• init_cluster: Initialize cluster and install pod network
• join_workers: Join node workers to cluster
• install_monit_tools: Install helm chart for Prometheus Stack
• Who's next?

Check each role folder for more details...