Question

Your team runs a public-facing web application served from a Compute Engine instance behind a global HTTP(S) load balancer at https://shop.example.com. Operations wants to be notified within a few minutes whenever the site becomes unreachable from multiple geographic regions. Using the least operational effort, what should you configure in Cloud Monitoring?

Accepted Answer

Create an uptime check targeting the URL https://shop.example.com with checks from multiple regions, then attach an alerting policy that fires when the check fails.

Answer

Install the Ops Agent on the VM and create a log-based metric that counts HTTP 500 responses, then alert on that metric.

Answer

Create a dashboard widget showing the load balancer request count and manually review it during business hours.

Answer

Write a Cloud Run job that curls the URL every minute and writes results to Cloud Logging, then create an alert on the log entries.