Lab - Troubleshooting Website Reachability behind a Load Balancer (Assessment Version)

The lab covers the concepts of configuring a web server behind an Elastic Load Balancer (ELB). The lab presents a scenario where users are not able to reach a website hosted on an Amazon Elastic Compute Cloud (Amazon EC2) instance behind a load balancer.

In contrast to a standard lab. an Assessment Version of a lab provides high-level instructions with hints to implement the lab objectives and learners can use the 'Check score' functionality to validate their progress. Learners also have the option of detailed instructions to complete the lab.

Objectives

• Examine the current configuration of the Application Load Balancer (ALB) and the website running on EC2 instances behind the ALB.
• Troubleshoot and identify the issues in the existing configuration which are preventing users from accessing the website.
• Remediate the configuration to allow users to access the website behind the ALB and ensure the solution is highly available.

Prerequisites

• Navigating through the AWS Management Console.
• Elastic Load Balancer (ELB).
• Amazon Virtual Private Cloud (Amazon VPC).
• Amazon Elastic Compute Cloud (Amazon EC2).

Outline

Task 1: Testing the web server reachability from the internet

Task 2: Troubleshooting and remediating website reachability issues

Task 3: Ensuring the solution is highly available