Which troubleshooting step should be taken to help resolve the problem reported by users?
Confirm that the Application Load Balancer is in a multi-AZ configuration.
Enable health checks on the Application Load Balancer.
Ensure that port 80 is configured on the security group.
Enable sticky sessions on the Application Load Balancer.
Explanations:
A multi-AZ configuration ensures high availability but does not address the issue of repeated logins, which is likely related to session persistence or cookie handling.
Health checks on the ALB ensure that traffic is routed to healthy instances but do not impact user sessions or the repeated login issue.
Port 80 configuration on the security group is important for traffic flow, but the issue relates more to session management than basic network connectivity.
Enabling sticky sessions on the ALB helps ensure that a user is always directed to the same backend instance, preventing issues with session loss and multiple logins.
In my opinion, the answer is:
Enable sticky sessions on the Application Load Balancer.