Question

Your team runs a fleet of IoT gateway devices that push a custom metric named 'device/heartbeat' to Cloud Monitoring every 60 seconds. Operations wants to be paged automatically if any device stops reporting its heartbeat entirely, indicating the gateway has gone offline. What is the most appropriate way to configure this alerting policy in Cloud Monitoring?

Accepted Answer

Create an alerting policy with a metric-absence condition on 'device/heartbeat', grouped by device, that triggers when data is missing for a chosen duration.

Answer

Create a metric-threshold alerting policy that fires when 'device/heartbeat' is greater than 0 for 5 minutes.

Answer

Create an uptime check pointed at each device's IP address and alert when the check fails.

Answer

Create a log-based metric that counts heartbeat log entries and alert when the count exceeds a threshold.