Terraform VPC Configuration

Overview

This Terraform project sets up a Virtual Private Cloud (VPC) on [AWS]. The configuration is modular, with each .tf file handling different components of the VPC, such as subnets, route tables, and gateways. This structure ensures that the VPC is scalable, secure, and easy to manage.

Prerequisites

Before using this Terraform configuration, ensure you have the following installed:

Terraform v1.0 or later

AWS CLI configured with appropriate credentials (for AWS) An active account with [AWS]

Project Structure

The project is organized into multiple .tf files, each responsible for a specific aspect of the VPC:

• provider.tf: This file defines the cloud provider (AWS, Azure, GCP) and the necessary credentials. It ensures that Terraform knows where to deploy the infrastructure.

• regionVariable.tf: Contains the variables related to the region where the VPC will be created. It allows you to specify and change the region easily.

• vpc.tf: This file contains the main configuration for creating the VPC, including the CIDR block and DNS settings.

• vpc_variable.tf: Defines variables related to the VPC, such as the CIDR block and whether DNS support is enabled.

• subnets.tf: Manages the creation of public and private subnets within the VPC. It allows for the division of the VPC into multiple subnets for different purposes.

• route_table.tf: Configures the route tables for the VPC, defining how traffic is routed between subnets and to external networks.

• gateways.tf: Sets up internet gateways or NAT gateways for the VPC, allowing instances in public subnets to communicate with the internet.

• nacls.tf: Configures Network ACLs (Access Control Lists) to provide an additional layer of security by controlling inbound and outbound traffic at the subnet level.

• terraform.tfstate & terraform.tfstate.backup: These files track the state of the deployed infrastructure, ensuring that Terraform can manage updates and changes over time.

Configuration

Input Variables

The configuration allows customization through various input variables defined in the vpc_variable.tf and regionVariable.tf files:

vpc_name: (Optional) The name to assign to the VPC. Default is my-vpc.

• cidr_block: (Required) The CIDR block for the VPC. Example: 10.0.0.0/16.
• region: (Optional) The region where the VPC should be created. Default is us-west-2.

Outputs

The project outputs several important details about the VPC, including:

vpc_id: The ID of the created VPC.

• public_subnet_ids: List of IDs of the created public subnets.
• private_subnet_ids: List of IDs of the created private subnets.
• route_table_id: The ID of the main route table associated with the VPC.

Clone the Repository

``bash git clone https://github.com/njange/Terraform.git cd Terraform

Initialize Terraform

bash terraform init

Run the following command to initialize the Terraform working directory:

Customize Variables

Modify the terraform.tfvars file or pass variables directly through the command line to customize the configuration.

Plan the Configuration

Run the following command to preview the changes that Terraform will make:

bash Copy code terraform plan

Apply the Configuration

Apply the Terraform configuration to create the VPC:

bash Copy code terraform apply

Review the proposed changes and type yes to confirm.

Destroy the Resources (Optional)

If you want to tear down the created infrastructure, run:

Review the proposed changes and type yes to confirm. This will remove all the resources that were created.