Ansible 2 machine vagrant setup

Vagrantfile.rb

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/trusty64"
  config.vm.define "app1" do |app|
    app.vm.hostname = "app1.dev"
    app.vm.network :private_network, ip: "192.168.60.4"
    app.vm.provision "shell", inline: <<-SHELL
      sudo apt-get update
      sudo apt-get install -y software-properties-common
      sudo apt-add-repository ppa:ansible/ansible
      sudo apt-get update
      sudo apt-get install -y ansible
    SHELL
  end
  config.vm.define "app2" do |app|
    app.vm.hostname = "app2.dev"
    app.vm.network :private_network, ip: "192.168.60.5"
  end
end