---
Vagrantfile.yaml:
---
box_image: 'ubuntu-20.04_mini-20211220c'
interface: 'eno1'
systems:
 smar002: ''
 delf003: ''

---
Vagrantfile:
---
# -*- mode: ruby -*-
# vi: set ft=ruby :

require 'yaml'

current_dir    = File.dirname(File.expand_path(__FILE__))
myconfigs        = YAML.load_file("#{current_dir}/Vagrantfile.yaml")

myhostnames = myconfigs['systems']
myinterface = myconfigs['interface']
mybox_image = myconfigs['box_image']

Vagrant.configure("2") do |config|
 myhostnames.each do |i,x|
  config.vm.boot_timeout = 900
  config.vm.define vm_name = "#{i}" do |subconfig|
   subconfig.vm.box = mybox_image
   subconfig.ssh.username = "vmadmin"
   subconfig.ssh.password = "vmadmin"
   subconfig.vm.hostname = "#{i}"
   subconfig.vm.network :public_network, auto_config: false, bridge: myinterface
   subconfig.vm.provision "shell", inline: <<-SHELL
    /bin/touch /tmp/firstrun
   SHELL
   subconfig.vm.provider "virtualbox" do |v|
    v.name = vm_name
    v.customize ["modifyvm", :id, "--paravirtprovider", "kvm"]
    v.customize ["modifyvm", :id, "--autostart-enabled", "on"]
    v.customize ["modifyvm", :id, "--nictype1", "virtio"]
    v.customize ["modifyvm", :id, "--nictype2", "virtio"]
   end
   #
   # https://superuser.com/questions/1338429/how-do-i-reboot-a-vagrant-guest-from-a-provisioner
   #
   #subconfig.trigger.after [:provision] do |t|
   # t.name = "Reboot after provisioning"
   # t.run = { :inline => "vagrant reload" }
   #end
   #config.vm.provision :shell do |shell|
   # shell.privileged = true
   # shell.inline = 'echo rebooting'
   # shell.reboot = true
   #end
  end
 end
end