Question

Your team runs a stateless web application on a single Compute Engine instance. Occasionally the application process hangs, and you must manually SSH in and restart the VM. You want Cloud Monitoring to automatically detect when the HTTP endpoint stops responding and immediately notify your on-call engineer's email, with the least operational effort. Which combination should you configure?

Accepted Answer

Create an uptime check against the HTTP endpoint, then create an alerting policy that triggers on the uptime check failure and sends to an email notification channel.

Answer

Install the Ops Agent and create a log-based metric that counts HTTP 500 errors, then alert when the count exceeds zero.

Answer

Create a Cloud Scheduler job that curls the endpoint every minute and writes results to a Pub/Sub topic subscribed by a Cloud Function that emails the team.

Answer

Enable the Compute Engine autohealing health check on a managed instance group and configure email alerts from the instance group.