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Mastering Ansible

Mastering Ansible

4.6 (15)
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Mastering Ansible

Mastering Ansible

4.6 (15)

Overview of this book

Automation is critical to success in the world of DevOps. How quickly and efficiently an application deployment can be automated, or a new infrastructure can be built up, can be the difference between a successful product or a failure. Ansible provides a simple yet powerful automation engine. Beyond the basics of Ansible lie a host of advanced features which are available to help you increase efficiency and accomplish complex orchestrations with ease. This book provides you with the knowledge you need to understand how Ansible works at a fundamental level and leverage its advanced capabilities. You'll learn how to encrypt Ansible content at rest and decrypt data at runtime. You will master the advanced features and capabilities required to tackle the complex automation challenges of today and beyond. You will gain detailed knowledge of Ansible workflows, explore use cases for advanced features, craft well thought out orchestrations, troubleshoot unexpected behaviour, and extend Ansible through customizations. Finally, you will discover the methods used to examine and debug Ansible operations, helping you to understand and resolve issues.
Table of Contents (10 chapters)
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Developing modules


Modules are the workhorses of Ansible. They provide just enough abstraction to enable playbooks to be stated simply and clearly. There are nearly 150 core modules maintained by the core Ansible development team covering clouds, commands, databases, files, network, packaging, source control, system, utilities, web infrastructure and more. In addition, there are more than 100 other extra modules, largely maintained by community contributors, that expand functionality in many of these categories. The real magic happens inside the module code, which takes in the arguments passed to it and works to establish the desired outcome.

Modules in Ansible are the bits of code that get transported to the remote host to be executed. They can be written in any language that the remote host can execute; however, Ansible provides some very useful shortcuts if writing the module in Python.

The basic module construct

A module exists to satisfy a need—the need to do some piece of work on a host...

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Mastering Ansible
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