Book Image

Ansible Playbook Essentials

By : Gourav Shah, GOURAV JAWAHAR SHAH
Book Image

Ansible Playbook Essentials

By: Gourav Shah, GOURAV JAWAHAR SHAH

Overview of this book

Ansible Playbook Essentials will show you how to write a blueprint of your infrastructure, encompassing multitier applications using Ansible's playbooks. Beginning with basic concepts such as plays, tasks, handlers, inventory, and YAML Ain't Markup Language (YAML) syntax that Ansible uses, you'll understand how to organize your code into a modular structure. Building on this, you will study techniques to create data-driven playbooks with variables, templates, logical constructs, and encrypted data, which will further strengthen your application skills in Ansible. Adding to this, the book will also take you through advanced clustering concepts, such as discovering topology information about other nodes in the cluster and managing multiple environments with isolated configurations. As you approach the concluding chapters, you can expect to learn about orchestrating infrastructure and deploying applications in a coordinated manner. By the end of this book, you will be able to design solutions to your automation and orchestration problems using playbooks quickly and efficiently.
Table of Contents (20 chapters)
Ansible Playbook Essentials
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Setting Up the Learning Environment
References
Index

The PHP5-FPM role


In PHP5-FPM, FPM stands for FastCGI Process Manager. PHP5-FPM comes with advanced features over fastcgi, which are useful for managing high-traffic sites. It is suitable for serving our fifanews site, which is expected to get a few million hits a day. Following our design tenet of creating a modular code, we would keep PHP functionality in its own role. Let's initialize the PHP5-FPM role using the Ansible-Galaxy command, as follows:

$ ansible-galaxy init --init-path roles/ php5-fpm

Defining an array

PHP installation will involve the installation of multiple packages, including php5-fpm, php5-mysql, and a few others. So far, we have been writing tasks one at a time. For example, let's take a look at the following code snippet:

  - name: install php5-fpm
    apt: name: "php5-fpm" 
  - name: install php5-mysql
    apt: name: "php5-mysql"

However, this could become repetitive when we want to install multiple packages, also causing redundant code. Being committed to writing data...