Terraform: Up & Running, 2nd Edition by Yevgeniy Brikman -- 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’s New in the Second Edition What You Won’t Find in This Book Open Source Code Examples Using the Code Examples Conventions Used in This Book O’Reilly Online Learning 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 Orchestration Tools Provisioning Tools

The Benefits of Infrastructure as Code How Terraform Works How Terraform Compares to Other IaC 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 Using Multiple Tools Together

Conclusion

2. Getting Started with Terraform

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

3. How to Manage Terraform State

What Is Terraform State? Shared Storage for State Files Limitations with Terraform’s Backends Isolating State Files

Isolation via Workspaces Isolation via File Layout

The terraform_remote_state Data Source Conclusion

4. How to Create Reusable Infrastructure with Terraform Modules

Module Basics Module Inputs Module Locals Module Outputs Module Gotchas

File Paths Inline Blocks

Module Versioning Conclusion

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

Loops

Loops with the count Parameter Loops with for_each Expressions Loops with for Expressions Loops with the for String Directive

Conditionals

Conditionals with the count Parameter Conditionals with for_each and for Expressions Conditionals with the if String Directive

Zero-Downtime Deployment Terraform Gotchas

count and for_each Have Limitations Zero-Downtime Deployment Has Limitations Valid Plans Can Fail Refactoring Can Be Tricky Eventual Consistency Is Consistent…Eventually

Conclusion

6. Production-Grade Terraform Code

Why It Takes So Long to Build Production-Grade Infrastructure The Production-Grade Infrastructure Checklist Production-Grade Infrastructure Modules

Small Modules Composable Modules Testable Modules Releasable modules Beyond Terraform Modules

Conclusion

7. How to Test Terraform Code

Manual Tests

Manual Testing Basics Cleaning Up After Tests

Automated Tests

Unit Tests Integration Tests End-to-End Tests Other Testing Approaches

Conclusion

8. How to Use Terraform as a Team

Adopting IaC in Your Team

Convince Your Boss Work Incrementally Give Your Team the Time to Learn

A Workflow for Deploying Application Code

Use Version Control Run the Code Locally Make Code Changes Submit Changes for Review Run Automated Tests Merge and Release Deploy

A Workflow for Deploying Infrastructure Code

Use Version Control Run the Code Locally Make Code Changes Submit Changes for Review Run Automated Tests Merge and Release Deploy

Putting It All Together Conclusion

A. Recommended Reading

Books Blogs Talks Newsletters Online Forums

Index

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