Custom OID or YAML modification for alerting additional oids?

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1

Hello,

I am trying to configure alerts for a Mikrotik RB1100Dx4 - with dual PSU. Since mikrotik does not have OIDs for status, I decided to monitor the voltage of each PSU, if it drops below 20V, send an alert.

Miktorik terminal:
4  psu1-voltage       24.4   V   
5  psu2-voltage       24.3   V  
4 name=.1.3.6.1.4.1.14988.1.1.3.100.1.2.7201
   value=.1.3.6.1.4.1.14988.1.1.3.100.1.3.7201 <- "added this to libreNMS for custom oid"
   type=.1.3.6.1.4.1.14988.1.1.3.100.1.4.7201
 5 name=.1.3.6.1.4.1.14988.1.1.3.100.1.2.7202
   value=.1.3.6.1.4.1.14988.1.1.3.100.1.3.7202 <- "added this to libreNMS for custom oid"
   type=.1.3.6.1.4.1.14988.1.1.3.100.1.4.7202

snmpwalk output:
iso.3.6.1.4.1.14988.1.1.3.100.1.2.7201 = STRING: “psu1-voltage”
iso.3.6.1.4.1.14988.1.1.3.100.1.2.7202 = STRING: “psu2-voltage”
iso.3.6.1.4.1.14988.1.1.3.100.1.3.7201 = Gauge32: 245
iso.3.6.1.4.1.14988.1.1.3.100.1.3.7202 = Gauge32: 243
iso.3.6.1.4.1.14988.1.1.3.100.1.4.7201 = INTEGER: 3
iso.3.6.1.4.1.14988.1.1.3.100.1.4.7202 = INTEGER: 3

It works fine under Custom OIDs, I can see the graphs. But the alerting does not work.

After searchnig a bit I found this: Alert on Custom OID - #2 by murrant and followed this: Health Information - LibreNMS Docs

I added this to /opt/librenms/includes/definitions/discovery/routeros.yaml

        voltage:
            data:
                     --- other default values here ----

              -
                    oid: psu1-voltage
                    value: voltage
                    num_oid: '.1.3.6.1.4.1.14988.1.1.3.100.1.3.7201'
                    divisor: 10
                    descr: 'PSU1 Voltage'
                -
                    oid: psu2-voltage
                    value: voltage
                    num_oid: '.1.3.6.1.4.1.14988.1.1.3.100.1.3.7202'
                    divisor: 10
                    descr: 'PSU2 Voltage'

After triggering a “rediscover device” nothing changes. I assume I did not configure this correctly.

Any help or hint appreciated.

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