Ensure load balancer health checks are used for AWS Auto Scaling Groups

Load balancer health checks are not used for AWS Auto Scaling Groups may lead to performance issues and unavailability of applications.

In AWS Console -

1. Sign in to the AWS Console and go to the EC2 console.
2. In the navigation pane, under Auto Scaling, choose Auto Scaling Groups.
3. Select the check box for your group.
4. Select Edit.
5. Under Health checks, for Health check type, choose ELB.
6. For Health check grace period, enter 300.
7. At the bottom of the page, choose Update.

In Terraform -

1. Create an 'aws_autoscaling_attachment' resource with an 'elb' linked using the name of the elb.
2. Set 'autoscaling_group_name' as the Auto Scaling Group having 'health_check_type' set to 'ELB'.

References:
https://docs.aws.amazon.com/autoscaling/application/userguide/what-is-application-auto-scaling.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/autoscaling_attachment