Description of problem:

AlertmanagerReceiversNotConfigured alerts are firing after a period of time, even though they were setup correctly and worked previously. It appears that the alert is being used more do indicate that a receiver has not been used. In this case a more appropriate name would be AlertmanagerReceiversNotUsed


How reproducible: Consistently


Steps to Reproduce:
1.Setup one or more valid Alertmanager receivers


Actual results:

After a period of time the alert starts firing


Expected results:

The AlertmanagerReceiversNotConfigured would not fire if valid receivers have been configured. An alert named AlertmanagerReceiversNotUsed would be more appropriate when indicating a receiver has not been actively used.