Book Image

Puppet 3: Beginner's Guide

By : John Arundel
Book Image

Puppet 3: Beginner's Guide

By: John Arundel

Overview of this book

<p>Everyone's talking about Puppet, the open-source DevOps technology that lets you automate your server setups and manage websites, databases, and desktops. Puppet can build new servers in seconds, keep your systems constantly up to date, and automate daily maintenance tasks. <br /><br />"Puppet 3 Beginner's Guide" gets you up and running with Puppet straight away, with complete real world examples. Each chapter builds your skills, adding new Puppet features, always with a practical focus. You'll learn everything you need to manage your whole infrastructure with Puppet.<br /><br />"Puppet 3 Beginner’s Guide" takes you from complete beginner to confident Puppet user, through a series of clear, simple examples, with full explanations at every stage.</p> <p>Through a series of worked examples introducing Puppet to a fictional web company, you'll learn how to manage every aspect of your server setup. Switching to Puppet needn't be a big, long-term project; this book will show you how to start by bringing one small part of your systems under Puppet control and, little by little, building to the point where Puppet is managing your whole infrastructure.</p> <p>Presented in an easy-to-read guide to learning Puppet from scratch, this book explains simply and clearly all you need to know to use this essential IT power tool, all the time applying these solutions to real-world scenarios.</p>

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Puppet 3: Beginner's Guide
John Arundel
Apr, 2013 | 204 pages
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Table of Contents (17 chapters)
Puppet 3 Beginner's Guide
Puppet 3 Beginner's Guide
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Introduction to Puppet
Introduction to Puppet
The problem
Solving the problem
Infrastructure as code
What is Puppet?
Summary
2
First steps with Puppet
First steps with Puppet
What you'll need
Time for action – preparing for Puppet
Time for action – installing Puppet
Your first manifest
Organizing your manifests
Time for action – creating a directory structure
Time for action – creating a node declaration
Summary
3
Packages, Files, and Services
Packages, Files, and Services
Packages
Time for action – installing Nginx
Modules
Time for action – creating an Nginx module
Time for action – making a "puppet apply" command
Services
Time for action – adding the Nginx service
Files
Time for action – deploying a virtual host
Summary
4
Managing Puppet with Git
Managing Puppet with Git
What is version control?
Time for action – importing your manifests into Git
Time for action – committing and inspecting changes
Distributing Puppet manifests
Time for action – creating a master Git repo
Time for action – cloning the repo to a new machine
Time for action – adding a new node
Time for action – pushing changes to the master repo
Time for action – automatic pull-and-apply script
Learning more about Git
Summary
5
Managing users
Managing users
Users
Time for action – creating a user
Access control
Time for action – adding an SSH authorized key
Time for action – deploying an SSH configuration file
User privileges
Time for action – deploying a sudoers file
Summary
6
Tasks and templates
Tasks and templates
Running commands with exec resources
Time for action – running an arbitrary command
Scheduled tasks
Time for action – scheduling a backup
Distributing files
Time for action – using a recursive file resource
Using templates
Time for action – templating an Nginx virtual host
Summary
7
Definitions and Classes
Definitions and Classes
Grouping resources into arrays
Definitions
Time for action – creating a definition for Nginx websites
Classes
Time for action – creating an NTP class
Summary
8
Expressions and Logic
Expressions and Logic
Conditionals
Expressions
Regular expressions
Arrays and hashes
Summary
9
Reporting and troubleshooting
Reporting and troubleshooting
Reporting
Time for action – generating a report
Debug output
Monitoring
Errors
Summary
10
Moving on Up
Moving on Up
Puppet style
Puppet learning resources
Projects
Last word
Index
Index

About the Reviewers

Ugo Bellavance has done most of his studies in e-commerce, started using Linux at Red Hat 5.2, got Linux training from Savoir-Faire-Linux at the age of 20, and got his RHCE on RHEL 6 in 2011. He's been a consultant in the past, but he's now an employee for a provincial government agency for which he manages the infrastructure (servers, workstations, network, security, virtualization, SAN/NAS, PBX). He's a big fan of open-source software and its underlying philosophy. He's worked with Debian, Ubuntu, and SUSE, but what he knows best is RHEL-based distributions. He's known for his contributions to the MailScanner project (he has been a technical reviewer for the MailScanner book), but he also gave time to different open-source projects, such as mondorescue, OTRS, SpamAssassin, pfSense, and a few others.

I thank my lover, Lysanne, who accepted allowing me some free time slots for this review even with a 2-year-old and a 6-month-old to take care of. The presence of these 3 human beings in my life is simply invaluable.

I must also thank my friend Sébastien, whose generosity is only matched by his knowledge and kindness. I would never have reached that high in my career if it wasn't for him.

Jason Slagle is a 15-year veteran of Systems and Network administration. Having worked on everything from Linux systems to Cisco networks and SAN Storage, he is always looking for ways to make his work repeatable and automated. When he is not hacking at a computer for work or pleasure, he enjoys running, cycling, and occasionally geocaching.

He is currently employed by CNWR, Inc., an IT and Infrastructure consulting company in his home town of Toledo, Ohio. There he supports several larger customers in their quest to automate and improve their infrastructure and development operations.

I'd like to thank my wife, Heather, for being patient through the challenges of being married to a lifelong systems guy, and my new son, Jacob, for bringing a smile to my face on even the longest days.

Johan De Wit was an early Linux user and he still remembers those days building a 0.9x Linux kernel on his brand-new 486 computer that took a whole night, and always had a great love for the UNIX Operating System.

It is not surprising that he started a career as a UNIX system administrator.

Since 2009, he has been working as an open-source consultant at Open-Future, where he got the opportunity to work with Puppet. Right now, Puppet has become Johan's biggest interest, and recently he became a Puppet trainer.

Besides his work with Puppet, he spends a lot of his free time with his two lovely kids and his two Belgian draft horses, and if time and the weather permit, he likes to drive his chopper.

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