NashTech Insights

How to Harness the Power of Terraform Modules for Reusable Infrastructure Automation

Rahul Miglani
Rahul Miglani
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As organizations embrace infrastructure as code (IaC) principles, they seek ways to optimize and streamline their infrastructure provisioning processes. One powerful tool that aids in achieving this goal is Terraform. Terraform allows you to define and manage infrastructure resources in a declarative and scalable manner. To further enhance the reusability and maintainability of Terraform code, developers can leverage Terraform modules. In this blog post, we will explore the concept of Terraform module and demonstrate how they can be used to create reusable infrastructure automation.

Understanding Terraform Modules:

Terraform module are self-contained, reusable units of Terraform configuration that encapsulate a specific set of resources or functionality. They allow you to package and share infrastructure code, making it easier to collaborate and promote best practices across teams. Modules provide a way to abstract complex configurations into reusable components, enabling you to create infrastructure building blocks that can be used across different projects.

Benefits of Using Terraform Modules:


Firstly, Modules promote code reusability by encapsulating infrastructure configurations and allowing them to be easily shared across projects. This eliminates the need to rewrite similar configurations for different environments or applications, saving time and effort.


Secondly, Modules facilitate better code organization and modular design. Changes made to a module propagate to all the projects using it, ensuring consistency and reducing the chances of configuration drift.


Thirdly, Modules provide a way to enforce best practices and standards across different projects. By defining modules that adhere to the organization’s guidelines, you can ensure consistent infrastructure provisioning and reduce the risk of misconfigurations.


Lastly, Modules foster collaboration between teams by providing a clear interface and abstraction layer. Different teams can work on specific modules independently, promoting parallel development and reducing interdependencies.

Example Terraform Code Snippet:

Let’s consider an example where we want to create an AWS VPC module that can be reused across multiple projects. The module will create a VPC, subnet, and an internet gateway.

In this example, we define a module for creating an AWS VPC. The module accepts two input variables, vpc_cidr_block and subnet_cidr_block, which allow customization of the VPC and subnet CIDR blocks. The module provisions the VPC, subnet, and an internet gateway using the provided inputs.

By utilizing this module, you can easily create consistent VPC infrastructure across different projects. Any changes made to the module will automatically propagate to all the projects that consume it, ensuring uniformity and reducing configuration discrepancies.


Lastly, Terraform modules are a powerful tool for achieving reusable and maintainable infrastructure automation. They enable code reusability, standardization, and collaboration across projects. By encapsulating infrastructure configurations into modular components, you can streamline provisioning processes and promote best practices.

Finally, In this blog post, we explored the concept of Terraform modules and their benefits. We also provided an example Terraform code snippet that demonstrated how to create an AWS VPC module. By leveraging Terraform modules, you can accelerate your infrastructure provisioning, reduce duplication, and foster collaboration within your organization.

Lastly, start utilizing Terraform modules in your infrastructure automation workflows and unlock the true potential of reusable infrastructure configurations. Happy coding!

Rahul Miglani

Rahul Miglani

Rahul Miglani is Vice President at NashTech and Heads the DevOps Competency and also Heads the Cloud Engineering Practice. He is a DevOps evangelist with a keen focus to build deep relationships with senior technical individuals as well as pre-sales from customers all over the globe to enable them to be DevOps and cloud advocates and help them achieve their automation journey. He also acts as a technical liaison between customers, service engineering teams, and the DevOps community as a whole. Rahul works with customers with the goal of making them solid references on the Cloud container services platforms and also participates as a thought leader in the docker, Kubernetes, container, cloud, and DevOps community. His proficiency includes rich experience in highly optimized, highly available architectural decision-making with an inclination towards logging, monitoring, security, governance, and visualization.

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