Puppet 4 Essentials, 2nd Edition: Acquire skills to manage your IT infrastructure effectively with Puppet PDF
Preview Puppet 4 Essentials, 2nd Edition: Acquire skills to manage your IT infrastructure effectively with Puppet
[ 1 ] www.it-ebooks.info Puppet 4 Essentials Second Edition Acquire the skills to manage your IT infrastructure effectively with Puppet Felix Frank Martin Alfke BIRMINGHAM - MUMBAI www.it-ebooks.info Puppet 4 Essentials Second Edition Copyright © 2015 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 authors, 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: November 2014 Second edition: December 2015 Production reference: 1071215 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78588-110-7 www.packtpub.com www.it-ebooks.info Credits Authors Project Coordinator Felix Frank Shweta H Birwatkar Martin Alfke Proofreader Safis Editing Reviewer Ger Apeldoorn Indexer Tejal Daruwale Soni Acquisition Editor Nadeem Bagban Production Coordinator Melwyn Dsa Content Development Editor Sumeet Sawant Cover Work Melwyn Dsa Technical Editor Menza Mathew Copy Editors Angad Singh Alpha Singh www.it-ebooks.info About the Authors Felix Frank has used and programmed computers for most of his life. During and after working on his computer science diploma, he gained experience on the job as a systems administrator, server operator, and open source software developer. He spent 6 years of his 11-year career as a Puppet power user. In parallel, he spent about two years intensifying his studies through ongoing source code contributions and active participation in several conferences. For making this title possible in the first place, and for their ongoing support, I'd like to thank my editors, Nadeem Bagban and Arwa Manasawala. Also, this book would not be what it is without the amazing feedback from my reviewers. For their kind feedback and ongoing support, I'd also like to thank a number of Puppet Labs employees: Michael Smith, Peter Huene, Josh Cooper, Andrew Parker, Adrien Thebo, Dawn Foster, Kara Sowles, Joshua Partlow, Henrik Lindberg, Charlie Sharpsteen, Nigel Kersten, Kylo Ginsberg, Ethan Brown, Rob Reynolds, Jeff McCune, and Eric Sorenson. Special thanks to Luke Kanies for creating Puppet and dedicating so many resources to this amazing community. Further thanks go to Waltraut Niepraschk and the whole datacenter staff at DESY Zeuthen for getting me on track with the central management of UNIX servers. Thanks also to mpex for giving me the opportunity to learn a lot about Puppet, and ultimately, write this very book. www.it-ebooks.info Martin Alfke is co-founder and CEO of example42 GmbH. He is a Puppet and automation enthusiast since 2007. In the past, he would have said he is a "system administrator". Nowadays, he likes the term "infrastructure engineer". The big difference is that system administrators sshs into systems to fix them, whereas infrastructure engineers fix their automation. Martin is serving as a Puppet Labs' training partner in Germany since 2011, conducting official Puppet training. In his spare time, he likes reading books and visiting interesting locations. www.it-ebooks.info About the Reviewer Ger Apeldoorn is a freelance Puppet consultant and teaches official Puppet Labs courses in the Netherlands. He has helped many companies implement Puppet (both Open Source and Enterprise), and has conducted talks at PuppetConf, PuppetCamps, FOSDEM, and other conferences. You can go through his official website at http://puppetspecialist.nl. www.it-ebooks.info www.PacktPub.com Support files, eBooks, discount offers, and more For support files and downloads related to your book, please visit www.PacktPub.com. Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub. com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at [email protected] for more details. 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Simply use your login credentials for immediate access. www.it-ebooks.info www.it-ebooks.info Table of Contents Preface vii Chapter 1: Writing Your First Manifests 1 Getting started 2 Introducing resources and properties 4 Interpreting the output of the puppet apply command 5 Dry-testing your manifest 7 Adding control structures in manifests 7 Using variables 9 Variable types 9 Controlling the order of evaluation 10 Declaring dependencies 12 Error propagation 15 Avoiding circular dependencies 16 Implementing resource interaction 18 Examining the most notable resource types 20 The user and group types 22 The exec resource type 23 The cron resource type 25 The mount resource type 25 Summary 26 Chapter 2: The Master and Its Agents 27 The Puppet Master 27 Puppet Master and Puppet Server 28 Setting up the master machine 29 Creating the master manifest 30 Inspecting the configuration settings 32 [ i ] www.it-ebooks.info
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