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Puppet 4.10 Beginner???s Guide, Second Edition
Puppet 4.10 Beginner???s Guide, Second Edition

Puppet 4.10 Beginner???s Guide, Second Edition: From newbie to pro with Puppet 4.10 , Second Edition

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Profile Icon John Arundel
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Full star icon Full star icon Full star icon Full star icon Half star icon 4.5 (4 Ratings)
Paperback May 2017 268 pages 2nd Edition
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Arrow left icon
Profile Icon John Arundel
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Full star icon Full star icon Full star icon Full star icon Half star icon 4.5 (4 Ratings)
Paperback May 2017 268 pages 2nd Edition
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Can$30.99 Can$44.99
Paperback
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Can$30.99 Can$44.99
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Puppet 4.10 Beginner???s Guide, Second Edition

Chapter 2. Creating your first manifests

Beginnings are such delicate times.

—Frank Herbert, Dune

In this chapter, you'll learn how to write your first manifest with Puppet, and how to put Puppet to work configuring a server. You'll also understand how Puppet compiles and applies a manifest. You'll see how to use Puppet to manage the contents of files, how to install packages, and how to control services.

Creating your first manifests

Hello, Puppet – your first Puppet manifest

The first example program in any programming language, by tradition, prints hello, world. Although we can do that easily in Puppet, let's do something a little more ambitious, and have Puppet create a file on the server containing that text.

On your Vagrant box, run the following commands:

   cat /vagrant/examples/file_hello.pp
file { '/tmp/hello.txt':
  ensure  => file,
  content => "hello, world\n",
}

Tip

If you're not using the Vagrant box, copy the file examples/file_hello.pp from the puppet-beginners-guide Git repo to the server you're using to try out Puppet.

Now apply it with the following command:

   sudo puppet apply /vagrant/examples/file_hello.pp
Notice: Compiled catalog for localhost in environment production in 0.07 seconds
Notice: /Stage[main]/Main/File[/tmp/hello.txt]/ensure: defined content as '{md5}22c3683b094136c3398391ae71b20f04'
Notice: Applied catalog in 0.01 seconds

Tip

If...

Managing packages

Another key resource type in Puppet is the package. A major part of configuring servers by hand involves installing packages, so we will also be using packages a lot in Puppet manifests. Although every operating system has its own package format, and different formats vary quite a lot in their capabilities, Puppet represents all these possibilities with a single package type. If you specify in your Puppet manifest that a given package should be installed, Puppet will use the appropriate package manager commands to install it on whatever platform it's running on.

As you've seen, all resource declarations in Puppet follow the following form:

RESOURCE_TYPE { TITLE:
  ATTRIBUTE => VALUE,
  ...
}

Package resources are no different. RESOURCE_TYPE is the package, and the only attribute you usually need to specify is ensure, and the only value it usually needs to take is installed:

package { 'cowsay':
  ensure => installed,
}

Try this example:

   sudo puppet...

Services

The third most important Puppet resource type is the service, a long-running process which either does some continuous kind of work, or waits for requests and then acts on them. For example, on most systems, the sshd process runs all the time and listens for SSH login attempts.

Puppet models services with the service resource type. Service resources look like the following example (you can find this in service.pp in the /vagrant/examples directory. From now on, I'll just give the filename of each example, as they are all in the same directory):

service { 'sshd':
  ensure => running,
  enable => true,
}

The ensure parameter governs whether the service should be running or not. If its value is running then, as you might expect, Puppet will start the service if it is not running. If you set ensure to stopped, Puppet will stop the service if it is running.

Services may also be set to start when the system boots, using the enable parameter. If enable is set to true...

Summary

In this chapter, we've seen how a manifest is made up of Puppet resources. We've learned how to use Puppet's file resource to create and modify files, how to install packages using the package resource, and how to manage services with the service resource. We've looked at the common package-file-service pattern, and seen how to use the notify attribute on a resource to send a message to another resource that its configuration has been updated. We've covered the use of the require attribute to make dependencies between resources explicit, when necessary.

We've also learned to use puppet resource to inspect the current state of the system according to Puppet, and puppet describe to get command-line help on all Puppet resources. To check what Puppet would change on the system, without actually changing it, we've introduced the --noop and --show_diff options to puppet apply.

In the next chapter, we'll see how to use the version control tool Git...

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Key benefits

  • Develop skills to run Puppet 4.10 on single or multiple servers without hiccups
  • Use Puppet to spin up and manage cloud resources such as Amazon EC2 instances
  • Take full advantage of the powerful new features of Puppet 4.10, including loops, data types, structured facts, R10K module management, control repos, and EPP templates

Description

Puppet 4.10 Beginner’s Guide, Second Edition, gets you up and running with the very latest features of Puppet 4.10, including Docker containers, Hiera data, and Amazon AWS cloud orchestration. Go from beginner to confident Puppet user with a series of clear, practical examples to help you manage every aspect of your server setup. Whether you’re a developer, a system administrator, or you are simply curious about Puppet, you’ll learn Puppet skills that you can put into practice right away. With practical steps giving you the key concepts you need, this book teaches you how to install packages and config files, create users, set up scheduled jobs, provision cloud instances, build containers, and so much more. Every example in this book deals with something real and practical that you’re likely to need in your work, and you’ll see the complete Puppet code that makes it happen, along with step-by-step instructions for what to type and what output you’ll see. All the examples are available in a GitHub repo for you to download and adapt for your own server setup.

Who is this book for?

Puppet Beginner’s Guide, Second Edition is designed for those who are new to Puppet, including system administrators and developers who are looking to manage computer server systems for configuration management. No prior programming or system administration experience is assumed.

What you will learn

  • •Covers the latest Puppet 4.10 release
  • •Install and set up Puppet and discover the latest and most advanced features
  • •Configure, build, and run containers in production using Puppet's industry-leading Docker support
  • •Deploy configuration files and templates at super-fast speeds and manage user accounts and access control
  • •Automate your IT infrastructure
  • •Use the latest features in Puppet 4 onward and its official modules
  • •Manage clouds, containers, and orchestration
  • •Get to know the best practices to make Puppet more reliable and increase its performance

Product Details

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Publication date, Length, Edition, Language, ISBN-13
Publication date : May 31, 2017
Length: 268 pages
Edition : 2nd
Language : English
ISBN-13 : 9781787124004
Vendor :
Puppet
Languages :
Tools :

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Product Details

Publication date : May 31, 2017
Length: 268 pages
Edition : 2nd
Language : English
ISBN-13 : 9781787124004
Vendor :
Puppet
Languages :
Tools :

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Table of Contents

13 Chapters
1. Getting started with Puppet Chevron down icon Chevron up icon
2. Creating your first manifests Chevron down icon Chevron up icon
3. Managing your Puppet code with Git Chevron down icon Chevron up icon
4. Understanding Puppet resources Chevron down icon Chevron up icon
5. Variables, expressions, and facts Chevron down icon Chevron up icon
6. Managing data with Hiera Chevron down icon Chevron up icon
7. Mastering modules Chevron down icon Chevron up icon
8. Classes, roles, and profiles Chevron down icon Chevron up icon
9. Managing files with templates Chevron down icon Chevron up icon
10. Controlling containers Chevron down icon Chevron up icon
11. Orchestrating cloud resources Chevron down icon Chevron up icon
12. Putting it all together Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.5
(4 Ratings)
5 star 50%
4 star 50%
3 star 0%
2 star 0%
1 star 0%
Pedro Galan Aug 09, 2017
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Very clear explanations for newbies.
Amazon Verified review Amazon
John Sep 23, 2017
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I'm only half way through the book but I've thoroughly enjoyed it so far. It explains the subject matter very well and takes a lot of the mystery out of Puppet. If you are looking for a way into Puppet I highly recommend this book by the well respected author, John Arundel.
Amazon Verified review Amazon
Ryan Estep Dec 13, 2017
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
I am using the book to aide my work right now. I would like a lecture series to go with it. Then I would give it five stars.
Amazon Verified review Amazon
Paul Nov 20, 2017
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Considered that I've used puppet in production environment and have an basic of certain features within puppet this book def did it's job by allowing me to fully understand features I did not know. I would recommend for newbie!
Amazon Verified review Amazon
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