Installation Ansible in Ubuntu which sample playbook

ppa:ansible/ansible repository 

sudapt-add-repository -y ppa:ansible/ansible
sudapt-get update
sudapt-get install -y ansible 

This installs Ansible globally.

Virtualenv's
This is my preferred way to install Ansible.

We can also use Pip to install virtualenv, which lets us install Python libraries in their own little environment that won't affect others (nor force us to install tools globally).

Here's how:

# Install python2.7 (Ubuntu 16.04 comes with python 3 out of the box) and Pip

sudo apt-get install -y python2.7 python-pip

## Use Pip to install virtualenv
### -U updates it if the package is already installed
sudo pip install -U virtualenv

Once we have pip and virtualenv installed globally, we can get Ansible inside of a virtual environment:

# Go to my user's home directory,

# make a directory to play with ansible

cd ~/
mkdir ansible-play
cd ansible-play

# Create a python virtual environment
virtualenv .venv

# Enable the virtual environment
source .venv/bin/activate

# Then anything we intall with pip will be
# inside that virtual environment
pip install ansible

Those commands will install the latest stable Ansible 2 (as of this writing).

Later, when you're done, you can deactivate the virtualenv via the deactivate command
At any time, you can update ansible by running:

# Assumes the virtualenv is active - `source .venv/bin/activate`
# Assuming the virtualenv is active
pip install -U ansible

 Basic Playbook Structure

---

- name: Example Playbook

  hosts: web_servers  # Target group from inventory

  become: yes         # Run as root/sudo

  vars:               # Define variables

    http_port: 80

    package_name: nginx

  tasks:

    - name: Ensure Nginx is installed

      apt:

        name: "{{ package_name }}"

        state: present

        update_cache: yes

    - name: Start and enable Nginx

      service:

        name: nginx

        state: started

        enabled: yes

Key Components:

hosts: Target servers (from inventory)

become: Privilege escalation (sudo)

vars: Playbook variables

tasks: Actions to execute