Check_MK Environmental Monitoring: Room Alert 4E

JR

2 minute read

One of our Network Engineers needed some monitoring (internal temp, external temp, and external humidity) added for an AVTech Room Alert 4E unit, preferably using a check_MK plugin. Couldn’t find one in any repos or in git, so decided to add this to a growing collection of plugins I’ve been working on. Another request from the same team: MinuteMan UPS units. I’ll be adding to my check_mk_bag git repo periodically with any new, custom check plugins. I’ll also try to get these on Check_MK’s Exchange. For now, here’s some environmental monitors, of course with perfdata output — gotta have the metrics available for trending!

As typical with check_MK checks, this supports auto-inventory (scan function configured):

ra4e_sensor_temp_defaultlevels = (28, 32)

def inventory_ra4e_sensor_temp(info):
inventory = []
for tempc, tempf, desc in info:
inventory.append( (desc, “ra4e_sensor_temp_defaultlevels”) )
import pprint ; pprint.pprint(info)
return inventory


def check_ra4e_sensor_temp(item, params, info):
for tempc, tempf, desc in info:
if desc == item:
warn, crit = params
temp = (int(tempc)/100)
tempf = (int(tempf)/100)
if tempc != "" and tempf != “":
infotext = “%.1f " % tempf + “F (%.1f C)” % temp + " (warn/crit at %.1f/%.1f " % (warn, crit) + “C)”
perfdata = [ ( “temperature”, temp, warn, crit ) ]
if temp >= crit:
return (2, “Temperature is: " + infotext, perfdata)
elif temp >= warn:
return (1, “Temperature is: " + infotext, perfdata)
else:
return (0, “Temperature is: " + infotext, perfdata )
else:
return (3, “Sensor is offline”)
return (3, “Sensor not found”)


check_info[“ra4e_sensor_temp”] = {
�check_function�:          check_ra4e_sensor_temp,
�inventory_function�:      inventory_ra4e_sensor_temp,
�service_description�:     �Temperature %s�,
�has_perfdata�:            True,
�snmp_info�:               (
“.1.3.6.1.4.1.20916.1.6.1.2.1”, [
1, #digital-sen1 - Degrees in Celsius
2, #digital-sen1 - Degrees in Fahrenheit
6, #digital-sen1 - Description
],
),
�snmp_scan_function�:     

lambda oid: “Room Alert” in oid(".1.3.6.1.2.1.1.1.0”),
�group�:                   �room_temperature�,

ra4e_sensor_temp view raw
comments powered by Disqus