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contrib-munin/plugins/other/snmp__linksys_poe

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2010-08-12 22:56:09 +02:00
#!/usr/bin/ruby
"
=head1 NAME
snmp__linksys_poe - Munin plugin to monitor the current supplied by Linksys PoE
switches.
Requires ruby and the ruby SNMP library.
=head1 APPLICABLE SYSTEMS
I wrote this to query SRW2008MP switches and determined the OIDs by trial and
error. There may be other Linksys devices that this will also work for.
=head1 CONFIGURATION
This plugin defaults to SNMP version 2c and a community string of 'public'. The
defaults can be overridden in the usual way:
[snmp_*]
env.version 1
env.community private
SNMP version 3 is not supported.
=head1 INTERPRETATION
The plugin simply reports the current being supplied on each of the device's
PoE ports.
=head1 MIB INFORMATION
Information is gathered from Linksys' private MIB space, so it's probably only
applicable to Linksys devices. I have been unable to get an actual copy of
the appropriate MIB, so I don't know the actual names of the values I'm
retrieving.
=head1 MAGIC MARKERS
#%# family=snmpauto contrib
#%# capabilities=snmpconf
=head1 VERSION
1.0
=head1 BUGS
None known.
=head1 AUTHOR
Written by Phil Gold <phil_g@pobox.com>.
=head1 LICENSE
CC0 <http://creativecommons.org/publicdomain/zero/1.0/>
To the extent possible under law, all copyright and related or neighboring
rights to this plugin are waived. Do with it as you wish.
=cut
"
require 'snmp'
idx_oid = "enterprises.3955.89.108.1.1.2"
max_oid = "enterprises.3955.89.108.1.1.6"
cur_oid = "enterprises.3955.89.108.1.1.5"
community = ENV['community'] || "public"
version = ENV['version'] == '1' ? :SNMPv1 : :SNMPv2c
case ARGV[0]
when "autoconf"
puts "no"
exit 1
when "snmpconf"
puts "require 1.3.6.1.4.1.3955.89.108.1.1.2.1. [0-9]"
puts "require 1.3.6.1.4.1.3955.89.108.1.1.5.1. [0-9]"
puts "require 1.3.6.1.4.1.3955.89.108.1.1.6.1. [0-9]"
exit 0;
when "config"
host = $0.match('^(?:|.*\/)snmp_([^_]+)')[1]
puts "host_name #{host}"
puts "graph_title PoE Power Usage"
puts "graph_vlabel Watts"
puts "graph_category sensors"
max_current = 0
SNMP::Manager.open(:Host => host,
:Community => community,
:Version => version) do |manager|
manager.walk([idx_oid, max_oid]) do |row|
puts "iface_#{row[0].value}.label Port #{row[0].value}"
puts "iface_#{row[0].value}.cdef iface_#{row[0].value},1000,/"
puts "iface_#{row[0].value}.line #{row[1].value.to_f / 1000}"
if row[1].value > max_current
max_current = row[1].value
end
end
end
puts "graph_args --upper-limit #{max_current.to_f / 1000}"
exit 0
else
host = $0.match('^(?:|.*\/)snmp_([^_]+)')[1]
SNMP::Manager.open(:Host => host,
:Community => community,
:Version => version) do |manager|
manager.walk([idx_oid, cur_oid]) do |row|
puts "iface_#{row[0].value}.value #{row[1].value}"
end
end
end