Configuring a Demand-Based Scaling Policy

An Auto Scaling group needs a scaling policy to determine when to perform scaling activities. Auto scaling policies work with CloudWatch to identify metrics and set alarms, which are triggered when the metrics fall outside of a specified value range. To configure a scale-based policy, you need to create the policy, and then create CloudWatch alarms to associate with the policy.

In the following example, we will create a demand-based scaling policy.
Note: For more information on CloudWatch, go to Using CloudWatch.