Question

A retail company runs a customer-facing web application on a managed instance group behind an external HTTPS load balancer. Internal dashboards show all backend instances as healthy, yet customers in several regions intermittently report that the login page fails to load. The operations team wants a proactive way to detect these user-facing failures from outside Google Cloud and alert on both availability and the correctness of the login page content. Which Google Cloud Observability capability should they implement?

Accepted Answer

Configure a Cloud Monitoring uptime check with a content-match assertion against the login URL and create an alerting policy on its check-passed metric.

Answer

Enable load balancer backend health checks with a shorter interval and alert when any backend becomes unhealthy.

Answer

Create a log-based metric on the application's HTTP 500 responses and alert when the error count exceeds a threshold.

Answer

Deploy the Ops Agent on each instance and alert on CPU and memory saturation to catch overloaded backends.