Terraform Introduction

What is Terraform

Terraform is an open source infrastructure as code tool used to build manage and automate infrastructure. Instead of manually creating servers databases or networks through cloud dashboards you can define everything in simple configuration files. Terraform then uses these files to provision and manage resources across different cloud providers in a consistent way.

Terraform explained in simple way

Lets imagine you want to create a website using AWS services. For a website, different services are used. For example

  • The code needs to be hosted somewhere, so a service like AWS S3 can be used
  • For storing website data, a database service like Amazon RDS is used
  • For content delivery and faster loading across regions, AWS CloudFront is used

Depending on how complex the website is, different services are combined to build the complete system. Now these services are backed by physical infrastructure. For example, compute power comes from physical servers, databases rely on storage devices, and networking is handled by data centers and networking hardware.

One way to create these AWS services is to open a browser, log in to the AWS Management Console, and manually create and configure each service one by one so that your application can use them

Now imagine a situation where your website infrastructure gets deleted accidentally, or you need to create another website with the same setup. In that case, you would have to manually recreate every service again by going through the AWS console step by step

This manual approach is slow, prone to errors, difficult to track, and not version controlled. This is where Terraform comes in and solves these problems. Instead of manually creating resources, you write your infrastructure as code in configuration files

Whenever you need to create the infrastructure, you simply run a few Terraform commands and all the required services are created automatically. If you want to delete the entire infrastructure, you can do that in seconds using Terraform without manual effort

This approach is fast, consistent, reduces human errors, and allows you to version control your infrastructure just like application code, which is why it has become an industry standard for managing infrastructure

Who Created Terraform

Terraform was created by Mitchell Hashimoto and Armon Dadgar, at a company called HashiCorp which is a company focused on infrastructure automation tools. Terraform was first released in 2014.

Why Was Terraform Created

Before tools like Terraform, managing infrastructure was mostly manual or done using scripts that were hard to maintain and reuse. Each cloud provider also had its own tools which made it difficult to manage resources across multiple platforms.

Terraform was created to solve these problems by providing a single tool that can work across different cloud providers. It allows developers and operations teams to define infrastructure using code which brings several advantages such as automation consistency and version control. It also helps in reducing human errors and makes it easy to recreate or modify infrastructure when needed.

Key Features of Terraform

  • Terraform uses a declarative approach which means you define what your infrastructure should look like and Terraform figures out how to achieve that state.
  • It supports multiple cloud providers so you can manage resources on platforms like AWS Azure and Google Cloud using the same tool.
  • It keeps track of infrastructure using a state file which helps it understand what changes are needed.
  • It allows infrastructure to be version controlled just like application code. It supports modular code which makes it easy to reuse configurations.

Terraform is a powerful and widely used tool in modern cloud environments. It simplifies infrastructure management by turning it into code which makes systems more reliable scalable and easier to maintain.