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Auto Scaling Group Does Not Cover Multiple Availability Zones

Overview

This check assesses whether an Auto Scaling group extends across various Availability Zones. The assessment results in failure if the Auto Scaling group lacks presence in multiple Availability Zones.

Amazon EC2 Auto Scaling groups offer the option to operate across multiple Availability Zones. While a single Availability Zone configuration is advantageous in certain scenarios, such as batch jobs or when minimizing inter-AZ transfer costs is crucial, an Auto Scaling group restricted to a single Availability Zone will not deploy instances in an alternative zone should the initially configured zone become unavailable.

Vendor

AWS

Cloud Service

Auto Scaling

CSMM v1 BCR-02.1, AutoScaling.2

Severity

3

Item Types

AWS::AutoScaling::AutoScalingGroup