Which solution will meet these requirements?
Create an A Record for the development website that has the value set to the ALB. Create a listener rule on the ALB that forwards requests for the development website to the target group that contains the development instance.
Recreate the development instance with a public IP address. Create an A Record for the development website that has the value set to the public IP address of the development instance.
Create an A Record for the development website that has the value set to the ALB. Create a listener rule on the ALB to redirect requests for the development website to the public IP address of the development instance.
Place all the instances in the same target group. Create an A Record for the development website. Set the value to the ALB. Create a listener rule on the ALB that forwards requests for the development website to the target group.
Explanations:
This option correctly uses an A Record pointing to the ALB. The ALB listener rule can be configured to forward requests to the target group containing the development instance. This setup ensures that even if the development instance is replaced, as long as it remains in the same target group, routing will continue to function correctly.
This option requires the development instance to have a static public IP address, which is not ideal for a dynamic environment where instances can be replaced. If the instance is replaced, the A Record would need to be updated with the new public IP, which does not meet the requirement of automatic routing to the new instance.
Similar to option B, this solution directs traffic to the public IP address of the development instance. If the instance is replaced, the public IP will change, requiring manual updates to the A Record, which fails to meet the requirement for automatic routing.
While this option sets up an A Record pointing to the ALB, placing all instances in the same target group is not necessary or optimal since it could lead to traffic being routed to multiple instances, not just the development instance. Additionally, it does not address the requirement to specifically route to one development instance.
I gauge that the answer is:
Create an A Record for the development website that has the value set to the ALB. Create a listener rule on the ALB that forwards requests for the development website to the target group that contains the development instance.