nearly empty playbook to trigger vagrant to create a valid Ansible inventory and keys

How to create a Vagrant Box to run Ansible against on OSX

* create a folder, here we call it /tmp/ansible-vagrant
* paste this two files inside
run:
$ vagrant up && vagrant provisioning
* this will create those both files that you will need to run ansible againt the box 
/tmp/ansible-vagrant.vagrant/machines/default/virtualbox/private_key
/tmp/ansible-vagrant.vagrant/provisioners/ansible/inventory/vagrant_ansible_inventory 

ansible-playbook  --private-key=.vagrant/machines/default/virtualbox/private_key  \
                  -u vagrant \
                  -i .vagrant/provisioners/ansible/inventory/vagrant_ansible_inventory \
                  path/to/the/playbook.yml

playbook.yml

---
- hosts: all
  tasks:
    - debug: msg="Please work Vagrant!"

Vagrantfile

# This guide is optimized for Vagrant 1.7 and above.
# Although versions 1.6.x should behave very similarly, it is recommended
# to upgrade instead of disabling the requirement below.
Vagrant.require_version ">= 1.7.0"

Vagrant.configure(2) do |config|

  config.vm.box = "ubuntu/trusty64"

  # Disable the new default behavior introduced in Vagrant 1.7, to
  # ensure that all Vagrant machines will use the same SSH key pair.
  # See https://github.com/mitchellh/vagrant/issues/5005
  config.ssh.insert_key = false

  config.vm.provision "ansible" do |ansible|
    ansible.verbose = "v"
    ansible.playbook = "playbook.yml"
  end
end