Multi Node k3s cluster

In the example below we will use a bare metal host to provision a Kairos cluster in the local network with K3s and one master node.

Installation

Use the provider-kairos artifacts which contains k3s.

Follow the Installation documentation, and use the following cloud config file with Kairos for the master and worker:

• server
• worker

#cloud-config

hostname: metal-{{ trunc 4 .MachineID }}
users:
- name: kairos
  # Change to your pass here
  passwd: kairos
  ssh_authorized_keys:
  # Replace with your github user and un-comment the line below:
  # - github:mudler

k3s:
  enabled: true
  args:
  - --disable=traefik,servicelb

#cloud-config

hostname: metal-{{ trunc 4 .MachineID }}
users:
- name: kairos
  # Change to your pass here
  passwd: kairos
  ssh_authorized_keys:
  # Add your github user here!
  - github:mudler

k3s-agent:
  enabled: true
  env:
   K3S_TOKEN: ...
   K3S_URL: ...

Deploy first the server; the value to use for K3S_TOKEN in the worker is stored at /var/lib/rancher/k3s/server/node-token on your server node.

Notably:

• we use the k3s block to disable traefik and servicelb (the default k3s load balancer)
• You can add additional configuration as args to k3s here, see k3s documentation