Ansible installation

• install virtualenv
• create virtualenv

$ virtualenv ~/VIRTUALENV/ansible2

• switch to created virtualenv

$ source ~/VIRTUALENV/ansible2/bin/activate

• upgrade setuptools

$ (ansible2)$ pip install --upgrade setuptools

• install ansible

$ (ansible2)$ pip install ansible==2.3.1

• upgrade ansible

$ (ansible2)$ pip install --upgrade ansible==2.3.1