Domain 2.1: Scalable Architectures — AWS SAA-C03 Practice Question 23

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Understand the difference between EC2 status checks (hardware) and ELB health checks (application layer).

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Configure the Auto Scaling group to use ELB health checks., Ensure the ALB health check is configured to ping a valid application endpoint.

By default, Auto Scaling uses EC2 status checks, which only verify hardware/network health. To replace instances where the application has crashed, you must enable ELB health checks on the ASG and ensure the ALB is checking a valid HTTP endpoint.

Common mistakes

Assuming EC2 status checks monitor application health.

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Common mistakes

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