Different alert messages for nodata

[jangaraj]

@duncanwhit

When I set the alert rule’s noDataState to “Alerting”, an alert is generated but the labels and values are identical to the high memory case so the it doesn’t seem possible to distinguish between the two to send the appropriate message text.

Yes, but State and health of alerts | Grafana documentation

alertname: Either DatasourceNoData or DatasourceError depending on the state.

So you can use notification policy for custom routing based on alertname. Probably you can use it also in the notification template to customize message.