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',
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