Example of running k0s using vagrant and the k0sctl binary to install on the 2 nodes.

k0sctl.yaml

#
# NOTES:
# - by default k0sctl will detect the network interface to use (usually eth0) for this configuration this will not work.
# - override the default network interface so nodes can talk over public ip range
#

apiVersion: k0sctl.k0sproject.io/v1beta1
kind: Cluster
metadata:
  name: k0s-cluster
spec:
  hosts:
  - ssh:
      address: 192.100.0.41
      user: vagrant
      port: 22
      keyPath: ./.vagrant/machines/k0s1/virtualbox/private_key
    role: controller
    privateInterface: eth1      # override the default network interface
  - ssh:
      address: 192.100.0.42
      user: vagrant
      port: 22
      keyPath: ./.vagrant/machines/k0s2/virtualbox/private_key
    role: worker
    privateInterface: eth1      # override the default network interface
  k0s:
    version: 1.21.3+k0s.0

Vagrantfile

# Defines our Vagrant environment
#
# -*- mode: ruby -*-
# vi: set ft=ruby :

nodeCount = 2
image = "debian/buster64"
ipRangeStart = 40

Vagrant.configure("2") do |config|

  # nodes
  if nodeCount > 0
    (1..nodeCount).each do |i|
      config.vm.define "k0s#{i}" do |config|
          config.vm.hostname = "k0s#{i}"
          config.vm.box_check_update = false
          config.vm.box = image
          config.vm.network "public_network", ip: "192.100.0.#{ipRangeStart + i}", :bridge => 'en0: Wi-Fi 2 (AirPort)'
          config.vm.provider "virtualbox" do |vb|
            vb.memory = "1024"
          end
      end
    end
  end
end