Chapter 6. Scaling and Updating Infrastructure

Honestly, you already know almost everything about Terraform now. Creating networks in the Cloud? Easy. Starting a new virtual server and provisioning it with favorite configuration management tool, isn't it a piece of cake? You know how to write a beautiful template. Refactor it into modules and configure it with many ways that are there to configure the template.

Perhaps you even moved your whole infrastructure to Terraform. But then you realize that creating infrastructure with Terraform is just the beginning; that is, your infrastructure is there to stay, and it needs to be updated continuously as your business requirements change.

There are many challenges in managing resources you have. We need to figure out how to perform changes without interrupting the service. We will take a look at the following and some other topics in this chapter:

• The means of scaling the service up and down with Terraform
• Performing an in-place upgrade...