Infrastructure as Code with Terraform

Curriculum

1. 01Why Infrastructure as CodeWhat infrastructure as code is and the problems it solves, how Terraform records what it manages, and how much of Tallybook's cloud was created by hand and forgotten.15 min
2. 02Providers, Resources and the WorkflowRead and write Terraform's language (HCL) - providers, resources, arguments and references - and learn the init, plan and apply workflow by running real Terraform in Colab with providers that need no cloud account.25 min
3. 03Variables and EnvironmentsUse variables, variable files, locals and outputs so one set of code builds both staging and production, and compare the two environments to see where they differ and what each costs.25 min
4. 04State and SecretsUnderstand what Terraform's state file contains, why it must be stored remotely with locking and encryption, and find the secrets sitting in plain text inside Tallybook's state.25 min
5. 05Reading a PlanRead a Terraform plan, both as people see it and as the JSON that tools read, summarise what each change will create, update, replace or destroy, and do it for six real pull requests.25 min
6. 06Dangerous ChangesRecognise the plans that destroy data or cause downtime (replacements of stateful resources, renames, mass deletions and hidden attribute changes) and fix them with moved blocks, lifecycle rules and safer sequencing.25 min
7. 07Policy as CodeTurn review rules into automatic checks that run on every plan (no destroying stateful resources, no sensitive ports open to the internet, required tags, flagged major upgrades) and see which of Tallybook's pull requests they block.25 min
8. 08Drift and ImportsFind drift (real infrastructure that no longer matches Terraform's state) and resources Terraform doesn't manage, then decide for each whether to import it, change it back or delete it.25 min
9. 09Modules and the PipelinePackage repeated infrastructure as modules with pinned versions, and design the pull request pipeline (format, validate, plan, policy checks, review and apply) that turns everything in this course into the everyday way of working.20 min
10. 10Final ProjectPlan your final project, a review of Tallybook's Terraform estate and six pending pull requests, with policy checks, drift and secrets findings, and the plan to make Terraform the only way infrastructure changes.20 min
11. Final assessmentPass it (60% or more) to earn the Infrastructure as Code with Terraform course completion badge.