Terraform Scenario Labs

Fix broken HCL configs, missing variables, and misconfigured backends

10 Scenarios ~15 min each

How It Works

Each lab drops you into a broken config. Your job: find the bug and fix it.

Read the Scenario

Understand what went wrong — a teammate pushed broken config and CI is failing.

Debug in the Terminal

Run the tool, read the errors, and trace them back to the source.

Fix & Verify

Edit the config, re-run the check, and confirm a clean result.

Terminal

Beginner(4)

Intermediate(3)

Advanced(3)

Beginner

4 labs

Start here — core concepts and simple fixes

Fix S3 Backend Configuration

Fix a misconfigured Terraform S3 backend and outdated provider version constraint

Beginner

Fix Resource Dependencies

Add explicit dependencies to prevent race conditions between an EC2 instance and a CloudWatch alarm

Beginner

Fix Dynamic Block Syntax

Fix iterator references and add a missing content block in a Terraform dynamic block

Beginner

Fix Broken EC2 Configuration

Debug and fix syntax errors in a Terraform AWS EC2 instance configuration

Beginner

Level Up to Intermediate

Intermediate

3 labs

Level up — multi-resource configs and debugging

Fix IAM Policy Document

Correct action name casing and add a missing Resource field in an IAM policy

Intermediate

Fix Lifecycle Rules

Add prevent_destroy and ignore_changes lifecycle rules to protect a production RDS database

Intermediate

Fix Module Configuration

Pass missing required input variables to a Terraform VPC module

Intermediate

Level Up to Advanced

Advanced

3 labs

Expert mode — complex configurations and edge cases

Fix Broken Output References

Fix output blocks that reference non-existent resource attributes on an RDS instance

Advanced

Fix Security Group Rules

Fix an overly permissive SSH rule and add a missing egress rule to an AWS security group

Advanced

Add Missing Variable Definitions

Resolve undeclared variable errors in a Terraform S3 bucket configuration

Advanced