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Luis Garca Acosta 2011-04-12 16:03:30 +02:00 • committed by Steve Schnepp
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#! /opt/csw/bin/ruby
#
# Wildcard-script to monitor network port usage using netstat. To monitor a
# port, link port_<service> to this file. E.g. This plugin shall run by root user
#
# ln -s /usr/share/munin/node/plugins-auto/port_ /etc/munin/node.d/port_www
#
# ...will monitor www connections. Services are those listed in
# /etc/services. Case service is not listed the numeric value shall be passed
#
# Author: Luis García Acosta
# V 1.0
# Date Tue April 12 09:20:21 CET 2011
require 'rubygems'
require 'munin'
SERVICE = $0.split( '_' ).last
SERVICE_F = '/etc/services'
PORT = /^[\d]+(\.[\d]+){0,1}$/ === SERVICE ? SERVICE : %x[grep #{SERVICE} #{SERVICE_F}].split( "\t\t" )[1].split( '/' )[0]
class PortMonit < Munin::Plugin
graph_attributes "#{SERVICE} port usage, known as #{PORT}",
:category => 'Mobile Gateway',
:info => 'This graph shows connection split by the state of the socket.',
:vlabel => 'Current connections'
declare_field :ESTABLISHED,
:label => 'Established', :draw => :AREA,
:type => :GAUGE, :min => 0
declare_field :CLOSE_WAIT,
:label => 'Waiting close', :draw => :STACK,
:type => :GAUGE, :min => 0
declare_field :TIME_WAIT,
:label => 'Waiting after close', :draw => :STACK,
:type => :GAUGE, :min => 0
declare_field :CLOSING,
:label => 'Closing', :draw => :STACK,
:type => :GAUGE, :min => 0
declare_field :LAST_ACK,
:label => 'Waiting for acknowledgement', :draw => :STACK,
:type => :GAUGE, :min => 0
declare_field :FIN_WAIT_1,
:label => 'Socket closed, connection shutting down', :draw => :STACK,
:type => :GAUGE, :min => 0
declare_field :FIN_WAIT_2,
:label => 'Connection closed, Socket still waiting', :draw => :STACK,
:type => :GAUGE, :min => 0
def retrieve_values
@_netstat = %x[netstat -n -P tcp | egrep "\.#{PORT} "].split( "\n" )
{ :ESTABLISHED => count( @_netstat, 'ESTABLISHED' ),
:CLOSE_WAIT => count( @_netstat, 'CLOSE_WAIT' ),
:CLOSING => count( @_netstat, 'CLOSING' ),
:LAST_ACK => count( @_netstat, 'LAST_ACK' ),
:FIN_WAIT_1 => count( @_netstat, 'FIN_WAIT_1' ),
:FIN_WAIT_2 => count( @_netstat, 'FIN_WAIT_2' ),
:TIME_WAIT => count( @_netstat, 'TIME_WAIT' ) }
end
private
def count( source, regex )
@_result = 0
source.each { |obj| @_result += 1 if obj.match( regex ) }
return @_result
end
end
PortMonit.new.run