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contrib-munin/plugins/snmp/snmp_room_alert_
2012-11-20 22:07:09 -08:00

111 lines
2.8 KiB
Ruby
Executable File

#!/usr/bin/ruby
# Plugin to monitor Room Alert 11E environmental units.
# Requires ruby and the ruby SNMP library.
#
# Written by Phil Gold <phil_g@pobox.com>.
#
# Usage: Copy or link into /etc/munin/node.d/. End word can be either
# "temperature" or "humidity".
#
# Parameters:
#
# config (required)
# autoconf (optional - used by munin-config)
#
# Config variables:
#
# units - DNS names of environmental units
# community - Community to use to access the Room Alert unit
# Defaults to 'public'.
# variables of the form label_<unit>_<num>, where dots and dashes in the
# unit names are replaced with underscores - labels for specific sensors
# in the unit.
# e.g. env.label_192_168_1_115_2 Main Unit
#
# Example config:
#
# [room_alert_*]
# env.units unit1.example.com unit2.example.com
# env.community private
# env.label_unit1_example_com_2 Main Unit
# env.label_unit1_example_com_3 Rack 2 Sensor
require 'snmp'
base_oid = "enterprises.20916.1.3.1"
case $0.match('[^_]+$')[0]
when "temperature"
subchannel = 1
name = "temperature"
label = "°C"
letter = "t"
when "humidity"
subchannel = 3
name = "humidity"
label = "% Relative Humidity"
letter = "h"
else
exit 1
end
def is_vb_valid(vb, subchannel)
return (vb.name[-1] == 0 and vb.name[-2] == subchannel and vb.value > 1)
end
def field_name(unit, vb, letter)
clean_unit = unit.gsub(/[.-]/, '_')
sensor = vb.name[-3].to_s
return "#{clean_unit}_#{letter}#{sensor}"
end
def label(unit, vb)
clean_unit = unit.gsub(/[.-]/, '_')
sensor = vb.name[-3].to_s
label = "#{unit} " + (ENV["label_#{clean_unit}_#{sensor}"] || "sensor #{sensor}")
end
units = (ENV['units'] || "").split(/\s+/)
community = ENV['community'] || "public"
case ARGV[0]
when "autoconf"
puts "no"
exit 1
when "config"
puts "graph_title Room Alert 11E units (#{name} probes)"
puts "graph_vlabel #{label}"
puts "graph_category sensors"
if name == "humidity"
puts "graph_args --lower-limit 0 --upper-limit 100"
end
units.each do |unit|
SNMP::Manager.open(:Host => unit,
:Community => community,
:Version => :SNMPv1) do |manager|
manager.walk(base_oid) do |vb|
if not is_vb_valid(vb, subchannel)
next
end
puts "#{field_name(unit, vb, letter)}.label #{label(unit, vb)}"
end
end
end
exit 0
end
units.each do |unit|
SNMP::Manager.open(:Host => unit,
:Community => community,
:Version => :SNMPv1) do |manager|
manager.walk(base_oid) do |vb|
if not is_vb_valid(vb, subchannel)
next
end
puts "#{field_name(unit, vb, letter)}.value #{vb.value.to_f / 100}"
end
end
end