IA01 · Infrastructure as Code & policy
Terraform Modules, Remote State & Plan Review
Use a module for the network, keep state remote with locking and review the plan in a pull request.
🎯 You will learn to
- Use modules
- Use remote state and locks
- Review plans
🧪 Live environment
Runs entirely in your browser: nothing is installed, no real cloud account is used and your code is never sent to our server.
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✅ Steps & checkpoints
🗺️ Modules and remote state
A root module calls a network module; state lives in a locked remote backend and the plan is reviewed in a pull request.
The 2D diagram shows the exact flow, ports and trust boundaries. The 3D scene is a concept view of the same parts; packets travel along the same arrows.
🤔 Think about it
What happens if two people apply at once without a lock?
🛡️ Safety & cost
Every apply here is simulated. Always review a real plan before you apply it.
🧹 Cleanup
Run destroy in the simulator, and in real life check that state is empty.
📚 Reference documents
- Terraform documentation · HashiCorp
- Terraform state · HashiCorp
- OpenTofu documentation · OpenTofu
- Bicep overview · Microsoft Learn
- What is AWS CloudFormation? · AWS
Official sources, checked on 5 Nov 2026. Cloud services change often; check the official page before relying on a feature. All references