Automating Infrastructure Deployment Using Terraform

This repository demonstrates how to use Terraform to automate the deployment of Google Cloud infrastructure. The project deploys an auto mode network with a firewall rule and two VM instances.

Project Overview

This project creates:

• One auto mode VPC network
• A firewall rule to allow HTTP, SSH, RDP, and ICMP traffic
• Two VM instances in different zones connected to the network

Video

https://youtu.be/FdxTlCYXBDs

Prerequisites

• Google Cloud Platform account
• Terraform (v1.5.7 or later)
• Google Cloud SDK

Project Structure

.
├── README.md
├── provider.tf          # Google Cloud provider configuration
├── mynetwork.tf         # Network and VM instance configurations
└── instance/            # VM instance module
    ├── main.tf          # VM instance resource definition
    └── variables.tf     # Input variables for the module

How to Use This Repository

1. Clone the Repository

git clone https://github.com/yourusername/terraform-gcp-infrastructure.git
cd terraform-gcp-infrastructure

2. Initialize Terraform

terraform init

3. Create an Execution Plan

terraform plan

4. Apply the Configuration

terraform apply

Confirm by typing yes when prompted.

5. Verify Deployment

1. In the Google Cloud console, navigate to VPC Network > VPC Networks to verify network creation
2. Navigate to VPC Network > Firewall to verify firewall rule creation
3. Navigate to Compute Engine > VM Instances to verify VM instances creation
4. Test connectivity between instances using SSH and ping commands

6. Clean Up Resources (Optional)

To destroy all resources created by Terraform:

terraform destroy

Confirm by typing yes when prompted.

Implementation Details

Network Configuration

The configuration creates an auto mode VPC network, which automatically creates a subnet in each region. The firewall rule allows HTTP (port 80), SSH (port 22), RDP (port 3389), and ICMP traffic.

VM Instance Module

The instance module is used to create VM instances with consistent configuration. The module takes the following input variables:

• instance_name: Name of the VM instance
• instance_zone: Zone where the VM instance is created
• instance_type: Machine type (defaults to e2-micro)
• instance_network: Network to which the VM instance is connected

Key Concepts

• Infrastructure as Code: Define infrastructure using code for improved consistency and reusability
• Modules: Reusable Terraform configurations for creating similar resources
• Resource Dependencies: Using references like self_link to create resources in the proper order

License

This project is licensed under the MIT License - see the LICENSE file for details.