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