Question

Your team runs a payment microservice on Compute Engine that writes structured logs to Cloud Logging. Application errors appear as log entries with severity=ERROR and a jsonPayload.transaction_status field of "declined". The on-call engineer wants to be paged whenever the rate of these declined-transaction errors exceeds a defined threshold over a 5-minute window. What is the most appropriate way to configure this in the operations suite?

Accepted Answer

Create a counter log-based metric that filters for the declined-transaction error entries, then build a Cloud Monitoring alerting policy on that metric with a threshold condition and a notification channel.

Answer

Configure a Cloud Logging log sink that exports the matching entries to Pub/Sub, and subscribe a Cloud Function that emails the on-call engineer when messages arrive.

Answer

Enable an uptime check against the payment microservice endpoint and set the alerting policy to trigger when the check reports failures.

Answer

Use Error Reporting to automatically group the log entries and rely on its default weekly digest email to notify the on-call engineer.