vagrant up sets up two virtual machines with salt-minion installed pointing to the static ip of my private machine.

vagrant.bootstrap.sh

#!/bin/sh
echo "192.168.255.124 salt" >> /etc/hosts
apt-get -y install python-software-properties avahi-daemon
add-apt-repository -y ppa:saltstack/salt
apt-get -y update
#  really, don't do this...
#apt-get -y dist-upgrade
apt-get -y install salt-minion

Vagrantfile

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

# Create two virtual machines, each with salt-minion installed
# They are bridged, so they need to reach a salt master somewhere.
# you can use these for trying out salt for deploying slightly different
# data collector settings for different machines from the same salt states

Vagrant.configure("2") do |config|
  box_url = "http://cloud-images.ubuntu.com/precise/current/precise-server-cloudimg-vagrant-i386-disk1.box"
  servers = {
    :dcc => "dcc99",
    :legacy => "legacy"
  }

  servers.each do |sid, sname|
    config.vm.define sid do |app_config|
      app_config.vm.box = "precise32-cloud"
      app_config.vm.box_url = box_url
      app_config.vm.hostname = sname.to_s
      app_config.vm.network :public_network, :bridge => "eth1"
      #app_config.vm.network :bridged, :bridge => "eth1"
      app_config.vm.provision :shell, :path => "vagrant.bootstrap.sh"
    end
  end

end