Automated Deployment of Web Servers with Auto Scaling Group and Load Balancer

Clone repo

git clone https://github.com/atulkamble/asg-lb-webserver-automation.git
cd asg-lb-webserver-automation

Auto Scaling Group with Load Balancer | Web Server Hosting

This project demonstrates the deployment of a scalable web server environment using AWS Auto Scaling Groups (ASG) in conjunction with an Elastic Load Balancer (ELB). The guide outlines the steps required to create a highly available and scalable web server infrastructure.

Tips and Configuration

1. Security Groups (SG) Configuration:

   • Instance-Level SG: Ensure that the security group associated with the EC2 instances allows HTTP (port 80) and HTTPS (port 443) traffic.
   • Load Balancer SG: Configure the security group for the Load Balancer to permit HTTP (port 80) and HTTPS (port 443) traffic.

2. Instance-Level Configuration:

   • Package Management: Install necessary packages and configure paths.
   • Web Server Path and Port:
     • Linux: /var/www/html/index.html (Port 80)
     • Windows: C:/inetpub/wwwroot/index.html (Port 80)

Steps to Deploy

1. Create Auto Scaling Group (ASG):

   • Define the parameters for the ASG, including the minimum, maximum, and desired capacities for your web server instances.

2. Create Launch Configuration/Template:

   • AMI: Use an Amazon Linux AMI or other Linux-based AMI.
   • Advanced Configuration: Insert the following user data script to initialize the instances:

     #!/bin/bash
     yum update -y
     yum install httpd -y
     systemctl start httpd
     systemctl enable httpd
     usermod -a -G apache ec2-user
     chmod 777 /var/www/html
     cd /var/www/html
     echo "<h1>hello from $(hostname -f) webserver</h1>" > /var/www/html/index.html

3. Instance Type:

   • On-Demand or Spot Instances: Choose between on-demand or spot instances based on your cost and availability preferences.

4. Define Scaling Parameters:

   • Configure the desired capacity, maximum capacity, and minimum capacity settings for the ASG.

5. Attach Load Balancer to ASG:

   • Link the Elastic Load Balancer to the Auto Scaling Group to distribute incoming traffic across the instances.

6. Verify Deployment:

   • Access the EC2 Management Console to monitor instance health and status.

7. Testing:

   • Public IP: Obtain the public IP address of the web server instance and verify that it serves the content by accessing it via a web browser.
   • Load Balancer: Check the Load Balancer to ensure it is properly routing traffic to healthy instances within the target group.

8. Cleanup:

   • Delete Auto Scaling Group: Remove the ASG, noting that associated instances will be terminated automatically.
   • Delete Target Group: Remove the target group from the Load Balancer configuration.
   • Delete Load Balancer: Delete the Elastic Load Balancer to complete the cleanup.

This project provides a detailed, step-by-step guide to setting up a scalable web server infrastructure using AWS services, ensuring high availability and load balancing for your applications.