test driven infrastructure with chef

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Test-Driven Infrastructure with Chef

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Test-Driven Infrastructure

with Chef

Stephen Nelson-Smith

Beijing Cambridge Farnham Köln Sebastopol Tokyo

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Test-Driven Infrastructure with Chef

by Stephen Nelson-Smith

Copyright © 2011 Atalanta Systems LTD. All rights reserved.

Printed in the United States of America.

Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.

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June 2011: First Edition.

Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of

O’Reilly Media, Inc. Test-Driven Infrastructure with Chef, the image of edible-nest swiftlets, and related

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ISBN: 978-1-449-30481-2

[LSI]

1307648888

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Table of Contents

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

1. Infrastructure As Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

The Origins of Infrastructure as Code 2

The Principles of Infrastructure as Code 4

The Risks of Infrastructure as Code 5

2. Introduction to Chef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

The Chef Framework 9

The Chef Tool 10

The Chef API 11

The Chef Community 11

3. Getting Started with Chef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Installing Ruby 14

Getting Set Up on the Opscode Platform 16

Installing Chef 18

Using Chef to Write Infrastructure Code 19

4. Behavior-Driven Development (BDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

A Very Brief History of Agile Software Development 23

Test-Driven Development 24

Behavior-Driven Development 25

Building the Right Thing 26

Reducing Risk 26

Evolving Design 26

Cucumber 27

5. Introduction to Cucumber-Chef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Prerequisites 31

Sign up for Amazon Web Services 31

v

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Installation 35

6. Cucumber-Chef: A Worked Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Introducing the Bram Consulting Group (BCG) 40

Gathering Requirements 40

Writing Acceptance Tests 43

Creating a Project with Cucumber-Chef 45

Making Tests Pass 47

Cooking with Chef 50

Resources 50

Recipes 51

Cookbooks 52

Roles 52

Running Chef 53

On With the Show 55

Databags 58

Making It Live 65

Environments 66

7. Next Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Managing Risk 71

Continuous Integration and Deployment 71

Monitoring 72

Conclusion 73

Further Reading 73

vi | Table of Contents

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