Book Image

Chef Infrastructure Automation Cookbook

By : Matthias Marschall
Book Image

Chef Infrastructure Automation Cookbook

By: Matthias Marschall

Overview of this book

Table of Contents (14 chapters)
Chef Infrastructure Automation Cookbook Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Preface

Irrespective of whether you're a systems administrator or developer, if you're sick and tired of repetitive manual work and don't know whether you may dare to reboot your server, it's time for you to get your infrastructure automated.

This book has all the required recipes to configure, deploy, and scale your servers and applications, irrespective of whether you manage five servers, 5,000 servers, or 500,000 servers.

It is a collection of easy-to-follow, step-by-step recipes showing you how to solve real-world automation challenges. Learn techniques from the pros and make sure you get your infrastructure automation project right the first time.

This book takes you on a journey through the many facets of Chef. It teaches you simple techniques as well as full-fledged real-world solutions. By looking at easily digestible examples, you'll be able to grasp the main concepts of Chef, which you'll need to automate your own infrastructure. Instead of wasting time trying to get the existing community cookbooks running in your environment, you'll get ready-made code examples to get you started.

After describing how to use the basic Chef tools, the book shows you how to troubleshoot your work and explains the Chef language. Then, it shows you how to manage users, applications, and your whole Cloud infrastructure. The book concludes by providing you with additional, indispensable tools, and giving you an in-depth look into the Chef ecosystem.

Learn the techniques of the pros by walking through a host of step-by-step guides to solve your real-world infrastructure automation challenges.

What this book covers

Chapter 1, Chef Infrastructure, helps you to get started with Chef. It explains some key concepts, such as cookbooks, roles, and environments, and shows you how to use some basic tools like the Chef development kit (ChefDK), such as Git, knife, chef shell, Vagrant, and Berkshelf.

Chapter 2, Evaluating and Troubleshooting Cookbooks and Chef Runs, is all about getting your cookbooks right. It covers logging and debugging as well as the why run mode, and shows you how to develop your cookbooks totally test driven.

Chapter 3, Chef Language and Style, covers additional Chef concepts, such as attributes, templates, libraries, and even Light Weight Resource Providers. It shows you how to use plain old Ruby inside your recipes and ends with writing your own Ohai and knife plugins.

Chapter 4, Writing Better Cookbooks, shows you how to make your cookbooks more flexible. It covers ways to override attributes, use data bags and search, and to make your cookbooks idempotent. Writing cross-platform cookbooks is covered as well.

Chapter 5, Working with Files and Packages, covers powerful techniques to manage configuration files, and install and manage software packages. It shows you how to install software from source and how to manage whole directory trees.

Chapter 6, Users and Applications, shows you how to manage user accounts, securing SSH and configuring sudo. Then, it walks you through installing complete applications, such as nginx, MySQL, WordPress, Ruby on Rails, and Varnish. It ends by showing you how to manage your own OS X workstation with Chef.

Chapter 7, Servers and Cloud Infrastructure, deals with networking and applications spanning multiple servers. You'll learn how to create your whole infrastructure using Chef provisioning. Then it shows you how to set up high-availability services and load-balancers, and how to monitor your whole infrastructure with Nagios. Finally, it'll show you how to manage your Amazon EC2 Cloud with Chef.

What you need for this book

To run the examples in this book, you'll need a computer running OS X or Ubuntu Linux 14.04. The examples will use Sublime Text (http://www.sublimetext.com/) as the editor. Make sure you configured Sublime text command-line tool subl to follow along smoothly.

It helps if you have Ruby 2.1.0 with bundler (http://bundler.io/) installed on your system as well.

Who this book is for

This book is for system engineers and administrators who have a fundamental understanding of information management systems and infrastructure. It helps if you've already played around with Chef; however, this book covers all the important topics you will need to know. If you don't want to dig through a whole book before you can get started, this book is for you, as it features a set of independent recipes you can try out immediately.

Sections

In this book, you will find several headings that appear frequently (Getting ready, How to do it…, How it works…, There's more…, and See also).

To give clear instructions on how to complete a recipe, we use these sections as follows:

Getting ready

This section tells you what to expect in the recipe and describes how to set up any software or preliminary settings required for the recipe.

How to do it…

This section contains the steps required to follow the recipe.

How it works…

This section usually consists of a detailed explanation of what happened in the previous section.

There's more…

This section consists of additional information about the recipe in order to make the reader more knowledgeable about the recipe.

See also

This section provides helpful links to other useful information for the recipe.

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: "The omnibus installer will download Ruby and all required Ruby gems into /opt/chef/embedded."

A block of code is set as follows:

name "web_servers"
description "This role contains nodes, which act as web servers"
run_list "recipe[ntp]"
default_attributes 'ntp' => {
  'ntpdate' => {
    'disable' => true
  }
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

name "web_servers"
description "This role contains nodes, which act as web servers"
run_list "recipe[ntp]"
default_attributes 'ntp' => {
  'ntpdate' => {
    'disable' => true
  }
}

Any command-line input or output is written as follows:

mma@laptop:~/chef-repo $ knife role from file web_servers.rb

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: "Open http://requestb.in in your browser and click on Create a RequestBin."

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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