11.2 Project — a three-tier application, built properly

Work through these

• Network design with the database unreachable from the internet

  The network is designed so the database cannot be reached from the internet at all, only from the application tier. Proving that, rather than asserting it, is the exercise.

• All of it defined in Terraform, deployable from scratch

  The whole environment is defined in code and can be created from nothing, which is what makes it reviewable and repeatable. A project that only exists because you clicked carefully cannot be shown to anyone.

  Terraform Tutorials · Tutorial

• Logs, metrics and one meaningful alert

  Logs, metrics and a single alert that would actually tell you something useful. One good alert demonstrates more understanding than a dashboard full of graphs.

• A README a stranger can follow, and a teardown that leaves no bill

  Documentation a stranger can follow, and a teardown that leaves nothing running. Both are what turn a project into something an employer can inspect safely.