Ensure your AWS Auto Scaling Group (ASG) health check feature is properly configured to detect whether its registered EC2 instances are healthy or not. If an AWS Elastic Load Balancer (ELB) is being used for distributing traffic across instances within the ASG make sure that the ELB health check is enabled (works at hypervisor and application level). If an Elastic Load Balancer is not being used within your ASG make sure that the EC2 health check is enabled (works at hypervisor level only).
This rule can help you with the following compliance standards:
- APRA
- NIST4
For further details on compliance standards supported by Conformity, see here.
This rule can help you work with the AWS Well-Architected Framework.
This rule resolution is part of the Conformity Security & Compliance tool for AWS.
efficiency
By using the right health check configuration for your Auto Scaling Groups, you can increase the reliability and availability of the applications deployed within these groups.
Audit
To determine if your ASGs are configured properly for using health checks and to verify the health check type used (ELB or EC2-based), perform the following:
Remediation / Resolution
To update your ASGs health check configuration based on whether these are associated with a load balancer, perform the following:
References
- AWS Documentation
- Auto Scaling Groups
- Trusted Advisor Best Practices (Checks)
- Health Checks for Auto Scaling Instances
- AWS Command Line Interface (CLI) Documentation
- autoscaling
- describe-auto-scaling-groups
- update-auto-scaling-group
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You are auditing:
Auto Scaling Group Health Check
Risk level: Medium