Terraform is an infrastructure as a code (IaC) tool. This tool helps you to build, change, manage or version the infrastructure using scripts. This includes most of the components such as instance compute, switch, router, Storage, DNS entries, SaaS features, etc.
Terraform can help infrastructure engineers to build and maintain the components safely and efficiently. Also, this tool provides building infrastructure in a group. For example, 10 people can write only one script in a group. When they want to merge their scripts in Terraform cloud their solutions are to build components without conflict.
There are only 5 main steps to deploy infrastructure with Terraform:
- Scope – Identify the infrastructure for your project.
- Author – Write the configuration for your infrastructure.
- Initialize – Install the plugins Terraform needs to manage the infrastructure.
- Plan – Preview the changes Terraform will make to match your configuration.
- Apply – Make the planned changes.
Below there is a picture that explains the Terraform aims flow:
This flow shows that, at first, practitioners try to write a script to create or change the infrastructure. That means he/she writes the aims in a script. Then push it on the Terraform (IaC) platform. In this way, you can write everything that you want to implement in your infrastructure. It can be possible with Terraform documents for each provider.
The second step is to check the latest script and the plan of infrastructure. The plan shows what will be implemented in our infrastructure. Then if there is a problem or misconfiguration in the script it is possible to correct and then apply it to infrastructure. The last step is the apply step. When you are sure of your setting it is time to apply it to infrastructure. Congratulations, you have new infrastructure in your company. Enjoy it and maintain it simple.
How does Terraform work?
Terraform creates and manages resources on cloud platforms and other services through its application programming interfaces (APIs). Providers enable Terraform to work with virtually any platform or service with an accessible API.
In the next post, we will learn how to install and use terraform commands, also we will run the first example.