Building a Reusable VPC, Subnets, and Firewall Rules Module

📰 Dev.to · Abraham Naiborhu

Learn to build a reusable VPC, subnets, and firewall rules module using Terraform to improve infrastructure management

intermediate Published 9 May 2026
Action Steps
  1. Create a new Terraform module for VPC, subnets, and firewall rules
  2. Define the module's input variables for customization
  3. Configure the VPC, subnets, and firewall rules using Terraform resources
  4. Test and validate the module using Terraform apply and destroy
  5. Reuse the module in other Terraform configurations to simplify infrastructure management
Who Needs to Know This

DevOps engineers and infrastructure managers can benefit from this module to streamline their Google Cloud resource creation and management

Key Insight

💡 Terraform modules can help improve infrastructure management by providing a reusable and customizable way to create and manage Google Cloud resources

Share This
🚀 Simplify your Google Cloud infrastructure management with reusable Terraform modules! 🚀

Key Takeaways

Learn to build a reusable VPC, subnets, and firewall rules module using Terraform to improve infrastructure management

Full Article

Title: Building a Reusable VPC, Subnets, and Firewall Rules Module

URL Source: https://dev.to/abrahamparn/building-a-reusable-vpc-subnets-and-firewall-rules-module-10p8

Published Time: 2026-05-09T07:16:13Z

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# Building a Reusable VPC, Subnets, and Firewall Rules Module - DEV Community
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Posted on May 9

# Building a Reusable VPC, Subnets, and Firewall Rules Module

[#terraform](https://dev.to/t/terraform)[#googlecloud](https://dev.to/t/googlecloud)[#devops](https://dev.to/t/devops)[#infrastructure](https://dev.to/t/infrastructure)

In the previous Terraform labs, I created Google Cloud resources directly from the root configuration.

That worked, but the structure was still quite simple.

Every resource was defined directly inside the main Terraform configuration. For a small lab, that is fine. But as the infrastructure grows, putting everything in one root configuration can become harder to maintain.

So in this lab, I started learning Terraform modules.

The goal is to turn the previous VPC and subnet configuration into a reusable local module.

But instead o
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