How to Deploy AWS Resources Using Terraform
1. Prerequisites
Before starting, ensure the following tools are installed and configured:
- Terraform - Install Terraform
- AWS CLI with configured Access KeyID and secret AccessKey.
Create a folder, exemple:my_test_deploy, open VS Code and open the folder you just created.
Create a new file and name it as main.tf, and paste the terraform code bellow.
2. Backend State Storage (Optional)
In a production environment, save your state file remotely. To enable S3 remote state storage, update the following block:
terraform {
backend "s3" {
bucket = "your-s3-bucket-name"
key = "terraform/state.tfstate"
region = "us-east-1"
encrypt = true
}
}
3. Terraform Configuration
Required Providers and Versions
terraform {
required_providers {
aws = {
source = "hashicorp/aws"
version = "~> 4.16"
}
}
required_version = ">= 1.2.0"
}
provider "aws" {
region = "us-east-1"
}
Create VPC
resource "aws_vpc" "my_vpc" {
cidr_block = "10.0.0.0/16"
enable_dns_hostnames = true
enable_dns_support = true
tags = {
Name = "my_vpc"
}
}
Create Public Subnet
resource "aws_subnet" "public_subnet" {
vpc_id = aws_vpc.my_vpc.id
cidr_block = "10.0.1.0/24"
availability_zone = "us-east-1a"
tags = {
Name = "public-subnet"
}
}
Create Private Subnet
resource "aws_subnet" "private_subnet" {
vpc_id = aws_vpc.my_vpc.id
cidr_block = "10.0.2.0/24"
availability_zone = "us-east-1b"
tags = {
Name = "private-subnet"
}
}
Create Internet Gateway
resource "aws_internet_gateway" "igw" {
vpc_id = aws_vpc.my_vpc.id
tags = {
Name = "my-igw"
}
}
Create Route Table for Public Subnet
resource "aws_route_table" "public_rt" {
vpc_id = aws_vpc.my_vpc.id
tags = {
Name = "public-route-table"
}
}
Add Route to Internet Gateway
resource "aws_route" "public_internet_route" {
route_table_id = aws_route_table.public_rt.id
destination_cidr_block = "0.0.0.0/0"
gateway_id = aws_internet_gateway.igw.id
}
Associate Public Subnet with Route Table
resource "aws_route_table_association" "public_assoc" {
subnet_id = aws_subnet.public_subnet.id
route_table_id = aws_route_table.public_rt.id
}
Launch an EC2 Instance
resource "aws_instance" "app_server_irlan" {
ami = "ami-01816d07b1128cd2d" # Replace with the desired AMI ID
instance_type = "t2.micro"
tags = {
Name = "app_server_irlan"
}
}
4. Outputs
Output VPC ID
output "vpc_id" {
value = aws_vpc.my_vpc.id
}
Output Public Subnet ID
output "public_subnet_id" {
value = aws_subnet.public_subnet.id
}
Output EC2 Instance Public IP
output "instance_public_ip" {
value = aws_instance.app_server_irlan.public_ip
}
Terraform Workflow
Open a terminal, and go to the folder you created earlier.
Step 1: Initialize Terraform
Run the following command to initialize the working directory and download the AWS provider plugin:
terraform init
Step 2: Review the Terraform Plan
Verify the resources that will be created:
terraform plan
Step 3: Deploy the Resources
Apply the Terraform script to provision resources on AWS:
terraform apply
Type yes when prompted to confirm the deployment.
5. Verify the Deployment
After applying the script:
- Check the AWS Management Console for the created VPC, subnets, and EC2 instance.
- Use the outputs printed to access the public subnet ID, EC2 instance public IP, and VPC ID.
- To get outputs again at any time, run:
terraform output
6. Clean Up
To destroy all resources created by Terraform:
terraform destroy
Confirm by typing yes when prompted.
Conclusion
Using Terraform to deploy infrastructure on AWS provides a scalable and consistent approach. This script automates the creation of a VPC, public and private subnets, an Internet Gateway, and an EC2 instance. You can modify or extend it further to include security groups, load balancers, or RDS instances as needed.
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