This guide will show how to setup Nginx+php5-fpm development VM’s using  Vagrant  with Ansible as provisioner with added bonus using Ansible Galaxy for roles.
Requirements:
Ubuntu 12.04 or higher
Virtualbox 4.14+
Vagrant 1.4.3
Ansible 1.4+
Setup Ansible using VirtualEnv to isolate working environment: 
$ virtualenv ansi_env
$ cd ansi_env
$ source bin/activate
$ pip install ansible
 
Assuming Virtualbox and vagrant are already installed:  
$ mkdir ~/vagrant 
$ cd ~/vagrant 
$ vagrant box add precise64 http://files.vagrantup.com/precise64.box
$ git clone https://github.com/cocoy/vagrant_ansible.git 
$ cd vagrant_ansible
$ vagrant up web 
The commands will launch  vagrant web vm with simply nginx installed.
The nice part is using Ansible Galaxy by adding more roles to speedup environment setup. 
$ export ANSIBLE_ROLES_PATH=playbooks/roles/
$  ansible-galaxy install nbz4live.php-fpm
Edit playbook/web.xml  under roles add the line below: 
 ---
 - hosts: all
   roles:
    - common 
    - nginx
    - nbz4live.php-fpm
Now let’s provision the web server with php-fpm added: 
$ vagrant provision web 
 
Now we can see nginx + php5-fpm installed. Let’s try adding site config and index.php then.
 ---
 - hosts: all
   roles:
    - common 
    - nginx
    - nbz4live.php-fpm
    - nginx-fpm-setup 
This time just run ansible provision web and hit localhost:8080 on your browser.
In summary Ansible Galaxy can ease our setup and ready to use Ansible roles!