Terragrunt

We manage a self-hosted GitLab instance entirely through Terraform: groups, projects, branch protection, and even git branches. All of it lives in one shared module and gets applied with Terragrunt. We upgraded that module’s provider from v18 to v19. The whole thing took about two or three hours. In that time, an AI assistant sounded confident twice about things that were not fully correct. I caught only one of the two mistakes in time, and only because checking a confident answer against something else was already a habit for me, not because I noticed a problem first. ...

When terragrunt plan on a single module takes over two minutes before showing a single AWS API call, something is wrong. This post covers two distinct performance problems I found and fixed in a large multi-account Terragrunt setup (~15 AWS accounts, 400+ modules). The Problem Running terragrunt plan on our EKS cluster module was taking 2 minutes 27 seconds just to start. With debug logging enabled, the culprit was clear: ...

How to Manage Terraform/OpenTofu/Terragrunt Versions? How often do you need to switch Terraform, Terragrunt, or OpenTofu versions when jumping between projects? For me, it’s pretty often and honestly, I used to hate it. Package managers like brew only let you install one version of a tool at a time. So every time I needed a different version, I had to install it manually. Not fun. Handling Multiple Versions with Ease Thankfully, there are tools that make managing multiple versions much easier. Here are some of them: ...