Munin contributed plugins

#!/usr/bin/env ruby

#

# Plugin to monitor the number of connections blocked by moblock.

#

# Requirements:

#

#       Moblock up and running with generated log files going to /var/log/moblock

#

# Parameters supported:

#

#       config

#       autoconf

#

# Configurable variables

#

#       logfile  - Override default moblock logfile

#

# Magic markers

#

#%# family=auto

#%# capabilities=autoconf

#

# Initialize vars

#

$logfile = ENV['logfile'] || "/var/log/moblock.log"

#

# Configure generated graph

#

def config

  puts "graph_args --base 1000 -r --lower-limit 0"

  puts "graph_title Moblock"

  puts "graph_vlabel Blocked Connections"

  puts "graph_category fw"

  puts "graph_info This graph shows the number of connections blocked by Moblock"

  puts "blocked_in.label Blocked In"

  puts "blocked_in.draw LINE1"

  puts "blocked_in.info Number of blocked incoming connections"

  puts "blocked_in.type GAUGE"

  puts "blocked_out.label Blocked Out"

  puts "blocked_out.draw LINE1"

  puts "blocked_out.info Number of blocked outgoing connections"

  puts "blocked_out.type GAUGE"

  puts "blocked_total.label Total Blocked"

  puts "blocked_total.draw LINE1"

  puts "blocked_total.info Total Number of blocked connections"

  puts "blocked_total.type GAUGE"

end

#

# Grep moblock logs for stats

#

def fetch(debug=false)

  num_in = %x{cat #{$logfile} | grep --extended-regexp 'IN: ' | wc -l}

  num_out = %x{cat #{$logfile} | grep --extended-regexp 'OUT: ' | wc -l}

  num_total = num_in.to_i + num_out.to_i

  puts "blocked_in.value #{num_in}"

  puts "blocked_out.value #{num_out}"

  puts "blocked_total.value #{num_total}"

end

#

# If moblock executable on path then allow autoconfiguration

#

def autoconf

  moblock_path = %x{which moblock}

  if moblock_path.index('moblock')

    puts "yes"

  else

    puts "no"

  end

end

#

# Handle command line args

#

case ARGV.first

  when 'config'

    config

  when 'debug'

    fetch true

  when 'autoconf'

    autoconf

  else

    fetch

end