You added a "routes" section containing a route with no receiver. This says: "if the alert is InstanceDown and the service is database, then don't send any alert". Only alerts which *don't* match this condition will fall through to the default receiver.
Try removing the "routes" section entirely to start with - then all alerts should go to your default receiver. After that, you can introduce routes as and when you require, to direct specific alerts to specific destinations. > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/f8ada933-3ca6-405c-b213-2815cbc2a40a%40googlegroups.com.
