Single Node k3s cluster

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

Installation

Use the provider-kairos artifacts which contains k3s.

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

#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

Notably:

• We use the k3s block to disable traefik and servicelb (the default k3s load balancer).
• We use write_files to write manifests to the default k3s manifest directory (/var/lib/rancher/k3s/server/manifests/) see docs to deploy MetalLB and configure it with the 192.168.1.10-192.168.1.20 IP range. Make sure to pick up a range which doesn’t interfere with your local DHCP network.