What should a solutions architect do so that the production environment can deploy successfully?
Increase the size of the EC2 instances.
Increase the health check timeout for the ALB.
Change the health check path for the ALB.
Increase the health check grace period for the Auto Scaling group.
Explanations:
Increasing the size of the EC2 instances does not address the health check failure issue. The problem is likely related to the instance startup time, not the instance size or capacity.
Increasing the health check timeout for the ALB would not resolve the underlying issue of the instances failing health checks due to the time taken to download the critical content from S3. This option does not address the root cause of the problem.
Changing the health check path for the ALB would not help if the instances are still failing health checks due to long startup times. The health check path must still be valid and accessible, but the core issue seems to be related to resource availability during initialization.
Increasing the health check grace period for the Auto Scaling group allows the EC2 instances more time to initialize and complete their user data scripts before being evaluated by the health checks. This is likely the best solution, as it accommodates the extra time needed due to the increased size of the content being downloaded from S3.
I outline that the answer is:
Increase the health check grace period for the Auto Scaling group.