Uphill Thomas. - Mastering Puppet
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.Puppet is a configuration management system and a language. It was written for and by system administrators to manage large numbers of systems efficiently and prevent configuration drifts.Mastering Puppet deals with the issues faced when scaling out Puppet to handle large numbers of nodes. It will show you how to fit Puppet into your enterprise and allow many developers to work on your Puppet code simultaneously. In addition, you will learn to write custom facts and roll your own modules to solve problems. Next, popular options for performing reporting and orchestration tasks will be introduced in this book. Moving over to troubleshooting techniques, which will be very useful. The concepts presented are useful to any size organization.By the end of the book, you will know how to deal with problems of scale and exceptions in your code, automate workflows, and support multiple developers working simultaneously.What You Will Learn:
Scale out your Puppet infrastructure using proxying techniques;
Automate your code promotion workflow using Git and r10k;
Solve real-world problems using public modules from the Puppet Forge;
Use Hiera to separate the data of your configuration from the code of your configuration;
Write your own custom facts in Ruby;
Extend Puppet with your own custom facts, modules, and types;
Use exported resources to orchestrate change between machines;
Debug a puppetserver using Java techniques.This book is an advanced guide to using and deploying Puppet 4 in your organization with a special focus on issues faced in larger enterprise deployments.
From an experienced author, learn to deal with scaling, performance, and multiple developers with the help of real-world examples.
This is the most up-to-date guide on Puppet, and covers the advanced concepts of Puppet 4.Who This Book Is For:
This book is for those who have intermediate knowledge of Puppet and are looking to deploy it in their environment. Some idea how to write simple modules for configuration management with Puppet is a prerequisite for this book. iPAD Amazon Kindle, PC , Cool Reader (EPUB), Calibre (EPUB, MOBI, AZW3), Adobe Digital Editions (EPUB), FBReader (EPUB, MOBI, AZW3).
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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: July 2014
Second edition: February 2016
Production reference: 1220216
Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham B3 2PB, UK.
ISBN 978-1-78588-810-6
www.packtpub.com
Author
Thomas Uphill
Reviewer
Bas Grolleman
Commissioning Editor
Priya Singh
Acquisition Editor
Nadeem Bagban
Content Development Editor
Mehvash Fatima
Technical Editor
Taabish Khan
Copy Editors
Ting Baker
Sneha Singh
Project Coordinator
Kinjal Bari
Proofreader
Safis Editing
Indexer
Tejal Daruwale Soni
Production Coordinator
Aparna Bhagat
Cover Work
Aparna Bhagat
Thomas Uphill is a long-time user of Puppet. He has presented Puppet tutorials at LOPSA-East, Cascada, and PuppetConf. He has also been a system administrator for over 20 years, working primarily with RedHat systems; he is currently a RedHat Certified Architect (RHCA). When not running the Puppet User Group of Seattle (PUGS), he volunteers for the LOPSA board and his local LOPSA chapter, SASAG. He blogs at http://ramblings.narrabilis.com.
Bas Grolleman works as a self-taught freelance Puppet professional in the Netherlands, he has his name in the code of many large-scale deployments. He learned the pain of scaling Puppet the hard way, that is, trial and error and spending hours going through a maze of dependencies. Now, he mostly tells people to take the time to do it right.
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The complexity of your installation will increase with the number of nodes in your organization. Working on a small deployment with a few developers is much simpler than working on a large installation with many developers.
Mastering Puppet Second Edition deals with the issues faced by larger deployments, such as scaling and versioning. This book will show you how to fit Puppet into your organization and keep everyone working. The concepts presented can be adopted to suit any size organization.
, Dealing with Load/Scale , will show you how to scale your Puppet infrastructure as your node count increases.
, Organizing Your Nodes and Data , is where we show different methods of applying modules to nodes. We look at Hiera and external node classifiers (ENCs).
, Git and Environments , introduces Git and how to use Git as an integral component of your Puppet infrastructure.
, Public Modules , shows how to use Puppet Forge as a source of modules and how to use several popular modules in your organization.
, Custom Facts and Modules , is where we extend Puppet with custom facts and start writing our own modules.
, Custom Types , is where we introduce defined types and show how to extend the Puppet language with our own custom types and providers.
, Reporting and Orchestration , is where we configure reporting to help track down errors in our Puppet deployments.
, Exported Resources , explains how useful it is to have resources on one node that can be applied to other nodes in your organization.
, Roles and Profiles , shows a popular design pattern in Puppet node deployments. Here we present the concept and show example usage.
, Troubleshooting , is where we show some common errors found in Puppet deployments, as well as possible solutions.
All the examples in this book were written and tested using an Enterprise Linux 7 derived installation, such as CentOS 7, Scientific Linux 7, or Springdale Linux 7. Additional repositories used were EPEL (Extra Packages for Enterprise Linux), the Software Collections (SCL) repository, the Foreman repository, and the Puppet Labs repository. The version of Puppet used was the latest 4.2 series at the time of writing.
This book is for those who have intermediate knowledge of Puppet and are looking to deploy it in their environment. Some idea of how to write simple modules for configuration management with Puppet is a prerequisite for this book.
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: "Now sign the certificate using the puppet cert sign command."
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