# Infrastructure as Code

## Overview

We use [terraform](https://developer.hashicorp.com/terraform) to manage some
of our infrastructure. It lets us repeat infrastructure setup tasks without
having to rely on individual developers clicking the right buttons in the right
order.

## Setup

1. Install terraform with the [official docs](https://developer.hashicorp.com/terraform/downloads)
2. Make sure you’re authenticated to GCP for [\*application\* usage](https://cloud.google.com/docs/authentication/application-default-credentials),
   not just normal gcloud usage: `gcloud auth application-default login`

## Development

Just put things into `main.tf` for now. You might want to check out the [GCP
tutorial](https://developer.hashicorp.com/terraform/tutorials/gcp-get-started) or the
[GCP provider docs](https://registry.terraform.io/providers/hashicorp/google/latest/docs).

Run:

1. `tf init` so you get the GCP provider. You only need to do this the first time.
2. `tf plan` to see what is going to happen.
3. `tf apply` to make changes to infrastructure.