This is a blog post in IAC with Terraform series. IAC stands for Infrastructure As Code. Modern IT infrastructure can be orchestrated using programmatic methods. Terraform is(was?) a popular open source software used to orchestrate infrastructure in the cloud and elsewhere too. Terraform has the concept of modules. With modules, you can code abstract infrastructure. For example, if you are creating a pattern of infrastructure over and over again, you could abstract the pattern into a Terraform module.