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

ENV['VAGRANT_DEFAULT_PROVIDER'] = 'libvirt'

require 'yaml'
secmachines = YAML.load_file("machines.yml")

Vagrant.configure("2") do |config|
  secmachines.each do |machines|
    config.vm.define machines["name"] do |server|
      server.vm.hostname = machines["name"]
      server.vm.box = machines["box"]
      server.vm.box_check_update = false
      server.vm.network "private_network", ip: machines["ip"] 

      server.vm.provider "libvirt" do |lv|
        lv.memory = machines["memory"]
        lv.cpus = machines["cpus"]
        lv.cpu_mode = "host-passthrough"
      end
    end
  end
  config.vm.synced_folder ".", "/vagrant", disabled: true
end