Hands-On: Building a Three-Tier Web Architecture with Terraform

This capstone lesson puts the workflow together end to end, so the individual commands stop feeling like a list.

The sequence is: write the configuration → terraform init to prepare providers → validate and fmt to check it → plan to preview → apply to build → show and output to confirm → destroy when it is no longer needed.

In Try It, run terraform init — the step everything else depends on, and the beginning of the loop you will repeat for the rest of your Terraform work.

A common stumble is knowing every command but hesitating over the order. Remember the loop — write, init, check, preview, apply, verify — and any change follows the same shape.

In real work, this loop runs in CI on every pull request: plan on proposal, apply on merge, with the plan output serving as the review artefact.