Terraform · Up and Running · Writing Infrastructure as Code by Brikman, Yevgeniy -- Read -- Imperial Library of Trantor

Index

Preface

Who Should Read This Book Why I Wrote This Book What You Will Find in This Book What You Won’t Find in This Book Open Source Code Examples Using the Code Examples Conventions Used in This Book O’Reilly Safari How to Contact O’Reilly Media Acknowledgments

1. Why Terraform

The Rise of DevOps What Is Infrastructure as Code?

Ad Hoc Scripts Configuration Management Tools Server Templating Tools Server Provisioning Tools

Benefits of Infrastructure as Code How Terraform Works How Terraform Compares to Other Infrastructure as Code Tools

Configuration Management Versus Provisioning Mutable Infrastructure Versus Immutable Infrastructure Procedural Language Versus Declarative Language Master Versus Masterless Agent Versus Agentless Large Community Versus Small Community Mature Versus Cutting Edge

Conclusion

2. Getting Started with Terraform

Set Up Your AWS Account Install Terraform Deploy a Single Server Deploy a Single Web Server Deploy a Configurable Web Server Deploy a Cluster of Web Servers Deploy a Load Balancer Cleanup Conclusion

3. How to Manage Terraform State

What Is Terraform State? Shared Storage for State Files Locking State Files Isolating State Files File Layout Read-Only State Conclusion

4. How to Create Reusable Infrastructure with Terraform Modules

Module Basics Module Inputs Module Outputs Module Gotchas

File Paths Inline Blocks

Module Versioning Conclusion

5. Terraform Tips and Tricks: Loops, If-Statements, Deployment, and Gotchas

Loops If-Statements

Simple If-Statements More Complicated If-Statements

If-Else-Statements

Simple If-Else-Statements More Complicated If-Else-Statements

Zero-Downtime Deployment Terraform Gotchas

Count Has Limitations Zero-Downtime Deployment has Limitations Valid Plans Can Fail Refactoring Can Be Tricky Eventual Consistency Is Consistent…Eventually

Conclusion

6. How to Use Terraform as a Team

Version Control

A Repository for Modules A Repository for Live Infrastructure The Golden Rule of Terraform

Automated Tests

Prepare Your Code Write the Test Code Use Multiple Types of Automated Tests

Coding Guidelines

Documentation File Layout Style Guide

Workflow

Plan Staging Code Review Production Some Types of Terraform Changes Can Be Automated Some Types of Terraform Changes Lead to Conflicts Larger Teams May Need to Use a Development Pipeline

Conclusion

A. Recommended Reading

Books Blogs Talks Newsletters Online Forums

Index