Gain insights into Infrastructure as Code with Terraform, sharpen your skills, and prepare for the HashiCorp Terraform Associate certification in a cloud-agnostic way.

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This course is designed to help learners obtain the Terraform Associate certification from HashiCorp. 

You’ve likely picked up this course because you dabbled in Terraform as a hobbyist or in a
development environment, and you’re excited about the possibilities of deploying Infrastructure 
as Code (IaC). It will enable you to sharpen your skills and prove your knowledge with a certification from HashiCorp. Terraform is an amazing tool to deploy Infrastructure as Code in a cloud-agnostic way. We’re excited to share our accumulated knowledge with you through this course.

HashiCorp Terraform Certified Associate Preparation Guide

# Why does Terraform lock the state?

State data is rather important, and transactions that involve the state should be atomic in nature. To prevent multiple processes from editing the state at the same time, Terraform locks the state.

# State locking behavior

Any operation that could edit the state first checks to make sure the state isn’t locked. If the state isn’t locked, Terraform attempts to create a lock on the state before making changes. Terraform doesn’t continue if it can’t attain a lock. We can override the locking behavior for several commands by using the `-lock=false` flag. This is a major change and should be approached with caution. A corrupted state is disastrous at best.

A `-lock-timeout` flag for most commands determines how long Terraform should wait to attain a lock on the state. This is useful for a state back-end that takes longer to create a lock for Terraform.

The majority of state back-ends support locking, but a few don’t. We should check the documentation for any given back-end to determine what features it supports.

# Key takeaways

Terraform can lock the state file on supported back-ends to prevent simultaneous write operations to the state data.


Learn about Terraform's state locking behavior.

Introduction to the Course

Introduction to Infrastructure as Code

Basics of Terraform

Outside the Workflow: Using the Terraform CLI

Terraform Modules

Navigate Terraform Workflow

Implement and Maintain State

Read, Generate, and Modify Configuration

Understand Terraform Enterprise Capabilities

Conclusion

Outline State Locking