Terraform Infrastructure for Jenkins Deployment

This Terraform configuration automates the provisioning of AWS infrastructure for a Jenkins deployment. The setup includes a Virtual Private Cloud (VPC), subnets, security groups, and an EC2 instance for Jenkins.

Infrastructure Overview

This Terraform script provisions the following AWS resources:

• VPC with configurable CIDR block, DNS support, and hostname resolution.
• Subnets (Public and Private) in a specified availability zone.
• Internet Gateway (IGW) for public subnet connectivity.
• NAT Gateway for private subnet connectivity.
• Route Tables to manage traffic routing.
• Security Groups to control inbound and outbound access.
• Key Pair for SSH access to EC2 instances.
• EC2 Instance configured for Jenkins deployment.

Configuration Variables

Below are the configurable variables used in the Terraform script:

General Tags

tags = {
    Name        = "<vpc-name>"
    Environment = "<environment>"
    Owner       = "<owner>"
}

• Name: Name assigned to the VPC.
• Environment: Deployment environment (e.g., Development, Staging, Production).
• Owner: Owner of the infrastructure.

AWS Provider

region = "<aws-region>"

• region: AWS region where the infrastructure will be deployed.

VPC Configuration

cidr_block           = "<vpc-cidr-block>"
enable_dns_support   = <true/false>
enable_dns_hostnames = <true/false>

• cidr_block: CIDR range for the VPC.
• enable_dns_support: Enable/disable DNS resolution support.
• enable_dns_hostnames: Enable/disable DNS hostnames for instances.

Subnet Configuration

public_subnet_cidr_block  = "<public-subnet-cidr>"
private_subnet_cidr_block = "<private-subnet-cidr>"
availability_zone         = "<availability-zone>"

• public_subnet_cidr_block: CIDR block for the public subnet.
• private_subnet_cidr_block: CIDR block for the private subnet.
• availability_zone: AWS availability zone to deploy the subnets.

Security Group Configuration

My_computer_ip = "<your-ip-address>/32"

• My_computer_ip: IP address allowed to connect via SSH.

Key Pair

key_name = "<key-pair-name>"

• key_name: Name of the SSH key pair used for EC2 instance access.

EC2 Instance Configuration

instance_type      = ["<instance-type>"]
private_key_path   = "<path-to-private-key>"

• instance_type: AWS instance type for the Jenkins server.
• private_key_path: Path to the private key file for SSH access.

Usage

1. Initialize Terraform

   terraform init

2. Validate Configuration

   terraform validate

3. Plan Deployment

   terraform plan

4. Apply Configuration

   terraform apply -auto-approve

5. Destroy Infrastructure (if needed)

   terraform destroy -auto-approve

Variables

Variable Name	Description	Example Value
tags	General tags for resource identification	{ Name = "jenkins-vpc", Environment = "Production" }
region	AWS region for resource deployment	ap-southeast-1
cidr_block	CIDR block for VPC	11.0.0.0/16
enable_dns_support	Enable DNS resolution support	true
enable_dns_hostnames	Enable DNS hostnames for instances	true
public_subnet_cidr_block	CIDR block for public subnet	11.0.1.0/24
private_subnet_cidr_block	CIDR block for private subnet	11.0.3.0/24
availability_zone	Availability zone for subnets	ap-southeast-1a
My_computer_ip	IP address allowed for SSH access	192.168.154.131/32
key_name	SSH key pair name	jenkins-key
instance_type	AWS instance type	t2.medium
private_key_path	Path to the SSH private key	./Modules/08_aws_key_pair/jenkins-key.pem

Prerequisites

• Terraform installed (>= v5.0).
• AWS CLI configured with necessary permissions.
• SSH key pair created for EC2 instance access.

Author

• VuPlayBoizz