How to Deploy EC2 Instances in Multiple AZs, with a Load Balancer, and SSL Certificate in AWS with Terraform

In this story, we will learn how to build several components to create a good foundation base to deploy high available web applications in AWS.

We will deploy:

• Amazon Linux EC2 Instances in multiple AZs
• An Application Load Balancer (ALB) to distribute the load between these EC2
• ALB Target Group and Listeners for HTTP and HTTPS protocols
• Register DNS Records in Route 53
• Create an SSL certificate using AWS Certificate Manager

If you are interested in deploying similar workloads for internal applications (not accessible from the internet), please look at this story → How to Deploy EC2 Instances with an Internal Load Balancer, and ACM SSL Certificate in AWS with Terraform.

Prerequisite #1: AWS Credentials

Before creating our AWS EC2 Instance, we will need AWS Credentials to execute our Terraform code.

The AWS provider offers a few options for providing credentials for authentication:

• Static credentials
• Environment variables
• Shared…