The guide walks readers through assembling a self‑healing, auto‑scaling web fleet on AWS using EC2, Auto Scaling Groups (ASG) and an Application Load Balancer (ALB). In roughly 45 minutes, beginners to intermediates create a launch template, configure target groups, and wire the pieces together for live traffic handling.

The architecture routes users through the ALB into a target group attached to the ASG, which launches EC2 instances from the launch template. Enabling ELB health checks ensures the group replaces unhealthy servers, a nuance that trips many SAA‑C03 exam takers. CloudWatch monitors CPU and network metrics to trigger scaling events.

A quick validation shows the ALB’s DNS returning different availability zones and the ASG automatically recreating a terminated instance. Costs stay low thanks to the Free Tier t3.micro, though the ALB incurs hourly fees that must be removed after testing. Future steps include CPU‑based scaling policies and adding an RDS backend.