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- Herausgeber: Packt Publishing
- Kategorie: Wissenschaft und neue Technologien
- Sprache: Englisch
Discover how to efficiently deploy and customize Ansible in the way your platform demands
About This Book
- Get the first book on the market that maximizes the functionalities of Ansible
- Master the skill of extending Ansible by deep diving into its modules and plugins
- Work through this step-by-step guide to customizing Ansible according to your requirements
Who This Book Is For
This book is perfect for developers and administrators who are familiar with Ansible and Python programming, but have no knowledge of how to customize Ansible.
What You Will Learn
- Get a thorough understanding of Ansible modules
- Find out everything about plugins that fit in the Ansible architecture
- Get to grips with designing modules and handling errors
- Work with data structures
- Distribute Ansible extensions using PyPi and Git submodules
- Get to know the various distribution methods of modules and plugins
In Detail
Ansible is an IT automation tool that lets you manage your Infrastructure as a Code. It helps you deploy your applications and manage configurations, thus making life easier. Ansible, in most ways, is self sufficient to address most of your requirements.
Ideally, standard modules, libraries, or plugins are used to automate a given IT platform. Customizing Ansible can be done by custom module and plugin development.
This book shows you how to automate most of the tasks in your IT environment, thus minimizing the need to manually perform scheduled tasks and extend your Ansible implementation by developing customized modules and plugins.
You'll begin by getting an understanding of the fundamental aspects of extending the Ansible framework, such as custom functions and reusable modules. You'll then progress to building custom plugins and extensions using the fundamental building blocks explained earlier. We'll also show you how to automate some tasks using scripts. Finally, we'll demonstrate how these extensions can be seamlessly integrated into existing Ansible installations and explain how to conduct unit testing on these extensions to ensure they work as desired.
Style and approach
This book is a learning book on the fundamentals of Ansible framework and how it can be leveraged to extend it using the modules and plugins.
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Seitenzahl: 120
Veröffentlichungsjahr: 2016
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Extending Ansible
Extending Ansible
Copyright © 2016 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: March 2016
Production reference: 1210316
Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham B3 2PB, UK.
ISBN 978-1-78217-500-1
www.packtpub.com
Credits
Author
Rishabh Das
Reviewer
Xiang Zhang
Commissioning Editor
Veena Pagare
Acquisition Editor
Subho Gupta
Content Development Editor
Divij Kotian
Technical Editor
Vivek Pala
Copy Editor
Lauren Harkins
Project Coordinator
Nikhil Nair
Proofreader
Safis Editing
Indexer
Tejal Soni
Graphics
Kirk D'Penha
Production Coordinator
Melwyn D'sa
Cover Work
Melwyn D'sa
About the Author
Rishabh Das, presently working with Red Hat India, is responsible for managing and maintaining the CI/CD workflow and infrastructure for his team. He has more than 3 years of industry experience and has extensive hands-on experience with Ansible. You can reach Rishabh on Twitter at @rshbhdas.
This book would have not seen the light of day without the support of many individuals—both known and unknown. I would like to express my gratitude to the Ansible and Python communities for making my life easier. Thank you to everyone who is part of this open source community for all the amazing work that you do.
I would like to thank my colleagues who helped me out at each step with their varying abilities. I couldn't have asked for more encouragement and support. Thank you for all the awesome projects you work on, giving me an opportunity to learn, explore, and push my limits.
Thanks to my friends and family, who have always been there no matter the time, situation, or place. Thanks for all the things you have done, for all the ideas you pitched in, for my craziness that you put up with, and for all the compromises you made to help me finish off what I started.
Lastly, but most importantly, I want to specially thank my father, who every single day, checked on my progress. I couldn't have reached this far without you. Thank you ma and baba.
About the Reviewer
Xiang Zhang is a systems engineer working for SINA. He has expertise in Python and has put Ansible in use to manage several thousand servers at work.
SINA is a NASDAQ-listed company and the parent company of Weibo, another NASDAQ-listed company.
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Preface
With most companies moving to the cloud, infrastructure needs are growing exponentially. The growing data and massive computing power required to store, analyze, and process this data adds to the infrastructure needs. With the endlessly increasing number of Internet service users and the enormous inflow of data accompanied by a race for data mining, big data and cloud services have opened up new data centers and expanded upon the existing ones. Also, with constantly scaling infrastructure and increasing demands, with the 99.9% uptime promises to keep, automated management of infrastructure became the need of the hour. DevOps soon became a necessity and the market has flooded with DevOps tools. Ansible is one such open source solution that combines orchestration, configuration management, and application deployment capabilities in one.
Ansible is an IT automation tool that lets you manage your Infrastructure as Code. It helps you deploy your applications and manage configurations, thus making life easier. It is an open source project built on Python and has great community support. Ansible, in most ways, is sufficient to address most of your requirements. With a number of modules and plugins available, Ansible makes everything look so easy. Writing and understanding playbooks is smooth.
This book is aimed at advanced users who already have a working knowledge of Ansible, we will discuss various extension points that are exposed by Ansible and how they can be exploited to fit our requirements. This book covers in detail the Ansible Python API, Ansible modules, and Ansible plugins. In this book—by means of real-life scenarios—demonstrates how Ansible can be extended to meet your requirements. This will take you through a step-by-step process of how you can fill in the gaps and become a master of Ansible.
What this book covers
Chapter 1, Getting Started with Ansible, is an introductory chapter that introduces you to Ansible and encourages you to become a power user. It introduces you to the Ansible architecture and gives you a reason to chose Ansible as an infrastructure and configuration management tool.
Chapter 2, Getting to Know Ansible Modules, covers the basics of writing an Ansible module. It introduces you to the AnsibleModule boilerplate. This chapter also helps you develop sample Ansible modules in Bash and Python.
Chapter 3, Digging Deeper into Ansible Modules, introduces you to handling arguments in an Ansible Module. It also takes you through a scenario of collecting information about the infrastructure by developing a custom Ansible module.
Chapter 4, Exploring API, covers in detail the Python API for Ansible, running Ansible programmatically, and discusses the various extension points provided by Ansible. It discusses topics such as Plugin Loader, Runner, Playbooks, and Callbacks in depth.
Chapter 5, An In-Depth Look at Ansible Plugins, covers different plugins from the code level. It also demonstrates how you can write your own Ansible plugin through a few examples.
Chapter 6, Fitting It All Together – Integration, covers various configuration options for Ansible, thus allowing the user to get the most out of the tool. This chapter introduces you to Ansible Galaxy, a platform for sharing roles. It takes the reader through the process of contributing to Ansible and distributing their modules and plugins.
Chapter 7, Becoming a Master – A Complete Configuration Guide, contains real-life scenarios where one can exploit the power of Ansible to perform the required tasks. Also contains scenarios where one can go a step ahead from using Ansible as an Infrastructure and configuration management tool.
What you need for this book
To get the most out of this book, you need the following:
Who this book is for
This book is perfect for developers and administrators who are familiar with Ansible and Python programming but have no knowledge of how to customize Ansible.
Conventions
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.
Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "A path specified by the library variable in the configuration file, located at /etc/ansible/ansible.cfg."
A block of code is set as follows:
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
Any command-line input or output is written as follows:
New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "By using the Add a Role option from the menu and supplying the required credentials, Galaxy will import the role from your GitHub repository and make it available on the Galaxy platform for the entire community."
Note
Warnings or important notes appear in a box like this.
Tip
Tips and tricks appear like this.
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Questions
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