While attempting to configure alarm_enrichment I am seeing a message about an inactive CMDB, similar to the following log message:
[main, alarm_enrichment] Unknown or inactive CMDB 'enricher_name' is referenced by alarm matcher '2'. Make sure this CMDB is defined and 'active = true' if this CMDB is required.
Checking the alarm_enrichment section of the NAS configuration shows that this CMDB is, in fact, defined and active, and it does appear to work properly, meaning that the desired enrichment is being performed.
This is a false-positive error which occurs any time alarm_enrichment is restarted and there is a CMDB and matcher defined.
This error can be safely ignored. This will be corrected in a future NAS version, and no functionality is being impacted.