112 lines
2.8 KiB
Ruby
Executable File
112 lines
2.8 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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"
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=head1 NAME
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snmp__linksys_poe - Munin plugin to monitor the current supplied by Linksys PoE
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switches.
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Requires ruby and the ruby SNMP library.
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=head1 APPLICABLE SYSTEMS
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I wrote this to query SRW2008MP switches and determined the OIDs by trial and
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error. There may be other Linksys devices that this will also work for.
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=head1 CONFIGURATION
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This plugin defaults to SNMP version 2c and a community string of 'public'. The
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defaults can be overridden in the usual way:
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[snmp_*]
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env.version 1
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env.community private
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SNMP version 3 is not supported.
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=head1 INTERPRETATION
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The plugin simply reports the current being supplied on each of the device's
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PoE ports.
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=head1 MIB INFORMATION
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Information is gathered from Linksys' private MIB space, so it's probably only
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applicable to Linksys devices. I have been unable to get an actual copy of
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the appropriate MIB, so I don't know the actual names of the values I'm
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retrieving.
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=head1 MAGIC MARKERS
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#%# family=snmpauto contrib
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#%# capabilities=snmpconf
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=head1 VERSION
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1.0
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=head1 BUGS
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None known.
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=head1 AUTHOR
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Written by Phil Gold <phil_g@pobox.com>.
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=head1 LICENSE
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CC0 <http://creativecommons.org/publicdomain/zero/1.0/>
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To the extent possible under law, all copyright and related or neighboring
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rights to this plugin are waived. Do with it as you wish.
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=cut
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"
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require 'snmp'
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idx_oid = "enterprises.3955.89.108.1.1.2"
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max_oid = "enterprises.3955.89.108.1.1.6"
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cur_oid = "enterprises.3955.89.108.1.1.5"
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community = ENV['community'] || "public"
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version = ENV['version'] == '1' ? :SNMPv1 : :SNMPv2c
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case ARGV[0]
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when "snmpconf"
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puts "require 1.3.6.1.4.1.3955.89.108.1.1.2.1. [0-9]"
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puts "require 1.3.6.1.4.1.3955.89.108.1.1.5.1. [0-9]"
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puts "require 1.3.6.1.4.1.3955.89.108.1.1.6.1. [0-9]"
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exit 0;
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when "config"
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host = $0.match('^(?:|.*\/)snmp_([^_]+)')[1]
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puts "host_name #{host}"
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puts "graph_title PoE Power Usage"
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puts "graph_vlabel Watts"
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puts "graph_category sensors"
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max_current = 0
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SNMP::Manager.open(:Host => host,
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:Community => community,
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:Version => version) do |manager|
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manager.walk([idx_oid, max_oid]) do |row|
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puts "iface_#{row[0].value}.label Port #{row[0].value}"
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puts "iface_#{row[0].value}.cdef iface_#{row[0].value},1000,/"
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puts "iface_#{row[0].value}.line #{row[1].value.to_f / 1000}"
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if row[1].value > max_current
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max_current = row[1].value
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end
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end
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end
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puts "graph_args --upper-limit #{max_current.to_f / 1000}"
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exit 0
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else
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host = $0.match('^(?:|.*\/)snmp_([^_]+)')[1]
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SNMP::Manager.open(:Host => host,
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:Community => community,
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:Version => version) do |manager|
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manager.walk([idx_oid, cur_oid]) do |row|
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puts "iface_#{row[0].value}.value #{row[1].value}"
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end
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end
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end
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