Deploying an Application Load Balancer (ALB) in AWS

In this lesson, we practiced launching an Application Load Balancer (ALB) in AWS to distribute traffic across multiple EC2 instances. Below is a structured breakdown of the process, including key concepts and step-by-step instructions.

🚀 Launching EC2 Instances

Before setting up the load balancer, we first need to create EC2 instances to handle incoming traffic.

1️⃣ Create Two EC2 Instances

• Navigate to EC2 → Launch Instances.
• Set instance count to 2.
• Name the first instance "My First Instance", and rename the second one later.
• Choose Amazon Linux 2 as the OS.
• Select t2.micro instance type.
• Skip key pair configuration (use EC2 Instance Connect instead).
• Network Settings: Select an existing security group (Launch Wizard 1), which allows HTTP and SSH traffic.
• User Data Script: Add a script to initialize the instances upon launch.
• Click Launch and then rename the second instance to "My Second Instance".

2️⃣ Verify EC2 Instances

• Copy the IPv4 Public Address of each instance.
• Paste into a browser to confirm that each instance returns "Hello World".

At this point, we have two running EC2 instances, each serving traffic individually.