When facing health check issues with a Load Balancer on Cloud, what command helps resolve the failed health checks?

In scenarios involving health check issues with a Load Balancer, the critical factor is ensuring that the backend instances are reachable over the appropriate network protocols and ports. When health checks fail, it often indicates that the Load Balancer cannot communicate with the backend services as expected. Creating a firewall rule that allows incoming traffic on port 80 is essential because health checks typically use HTTP or HTTPS protocols to assess the functionality of backend services.

By allowing incoming traffic on port 80, you are ensuring that the Load Balancer can send health check requests to the backend instances. If the necessary ports are blocked by firewall rules, the health checks will fail regardless of whether the backend services are actually healthy. Thus, enabling traffic on the correct port is a foundational step in troubleshooting and resolving these health check issues.

Other options relate to different aspects of the backend instance configuration but do not directly address the blocked communication that is often the cause of failed health checks. While assigning access configurations or adding tags can be part of a broader approach to managing backend resources, they do not specifically resolve the immediate issue of blocked traffic that might be contributing to health check failures. Allowing egress traffic is also important but pertains more to instances initiating outbound connections rather than the Load Balancer performing health checks