Details
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Bug
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Resolution: Fixed
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Major
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None
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Professional Edition
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None
Description
I'am not very sure but I think there is a problem if the sensor_value / measured value is "0" in snmp reply for custom alerts. We have a lot of false positive since months which we simply ignored until today but now we would like to fix this.
I have an alert that checks the RX power light level and triggers an alert if the sensor_value is below sensor_limit_low. That's working so far fine, but if the device replys with an INTEGER of 0 I'am not able to match it. The alert still gets triggered in this case which shouldn't.
I also added a screenshot of the alert, the current database output, test conditions used in checker and a snmpget for the specific OID.
sensor_value le @sensor_limit_low |
sensor_value ne 0.00000 |
sensor_value ne 0 |
sensor_value ne -40.00000 |
sensor_value ne -30.00000 |
{
|
"table": "sensors", |
"rows": |
[
|
{
|
"sensor_id": 48785, |
"sensor_deleted": 0, |
"sensor_class": "dbm", |
"device_id": 52, |
"poller_type": "snmp", |
"sensor_oid": ".1.3.6.1.4.1.9.9.91.1.1.1.1.4.46010283", |
"sensor_mib": "CISCO-ENTITY-SENSOR-MIB", |
"sensor_object": "entSensorValue", |
"sensor_index": "46010283", |
"sensor_type": "CISCO-ENTITY-SENSOR-MIB-entSensorValue", |
"sensor_descr": "Non-Cisco OEM SFP+ 10G Pluggable Optics Module - Transceiver Rx Power - Rx 0/0/2/1", |
"sensor_unit": "W", |
"sensor_multiplier": 0.000001, |
"sensor_limit": 0, |
"sensor_limit_warn": -1.00179, |
"sensor_limit_low": -15.5284, |
"sensor_limit_low_warn": -14.437, |
"sensor_custom_limit": 0, |
"entPhysicalIndex_measured": "36", |
"measured_class": "port", |
"measured_entity": "6010", |
"entPhysicalIndex": "46010283", |
"entPhysicalClass": null, |
"sensor_ignore": 0, |
"sensor_disable": 0, |
"sensor_value": 0.00000, |
"sensor_event": "alert", |
"sensor_status": "Sensor critical thresholds exceeded.", |
"sensor_polled": 1579166206, |
"sensor_last_change": 1563878252 |
}
|
]
|
}
|
root@observium:/opt/observium# snmpget -c XXX -v 2c asr .1.3.6.1.4.1.9.9.91.1.1.1.1.4.46010283 |
iso.3.6.1.4.1.9.9.91.1.1.1.1.4.46010283 = INTEGER: 0 |
