Google resource hierarchy
Before we discuss how to manage environments in Terraform, let’s briefly review how to set up environments in Google Cloud. Within Google Cloud, a project is a basic container to manage a cloud deployment, including resources, permissions, and billing. When you start with Google Cloud, you generally have one project, then add a second and third project. These projects are entirely independent; that is, they share no IAM permission or resource policy.
As the number of our projects increases, managing these projects, for example, billing and IAM permissions, can become unwieldy. Thus, as we grow our footprint in Google Cloud, it is recommended to set up a resource hierarchy (you can read about this more here: https://cloud.google.com/resource-manager/docs/cloud-platform-resource-hierarchy) with an organization as the root node. This resource hierarchy allows us to organize projects into folders and subfolders. We can then manage permissions on a folder...
