AWS Auto Scaling

[Theory+Lab] Auto scaling Groups and Launch Configurations with Amazon EC2

Auto Scaling helps you maintain application availability and allows you to scale your Amazon EC2 capacity up or down automatically according to conditions you define. Before creating an auto scaling group, you need to create launch configurations, and is very similar to creating an EC2 instance.

If you have not deleted previous s3 bucket or the elastic load balancers, you may reuse them. Else you can create them following the exercises.