Munin contributed plugins

#!/usr/bin/env ruby

# mongrel_memory - A munin plugin for OpenSolaris to monitor memory size of

#                  each individual mongrel process

# Copyright (C) 2009 Matthias Marschall - mm@agileweboperations.com

#

# Based on:

# mongrel_process_memory - A munin plugin to monitor memory size of

#                          each individual mongrel process

# Copyright (C) 2007 Ben VandenBos and Avvo, Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License version 2

# as published by the Free Software Foundation.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License along

# with this program; if not, write to the Free Software Foundation, Inc.,

# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Author: Ben VandenBos

# Contributors: Adam Jacob (<adam@hjksolutions.com>)

#               Ryan Woodrum

#               Matthias Marschall (mm@agileweboperations.com)

#

#%# family=auto

#%# capabilities=autoconf

module Munin

  class MongrelProcessMemory

    def run

      pid_port_map = get_pids()

      port_list = Hash.new

      pid_port_map.sort.each do |pid, port|

        rss = `pmap -x #{pid} | grep total`.split(" ")[3]

        puts "mongrel_#{port}.value #{rss}"

      end

    end

    def get_pids

      h = Hash.new

      pids = []

      pids += `pgrep mongrel_rails`.split("\n")

      pids += `pgrep ruby`.split("\n")

      pids.each { |pid|

        l = `pargs -l #{pid}`

      	l =~ /-p (\d+)/

      	h[pid] = $1 if $1

      }

      h

    end

    def autoconf

      get_pids().length > 0

    end

  end

end

mpm = Munin::MongrelProcessMemory.new

case ARGV[0]

when "config"

  puts "graph_title Mongrel Memory"

  puts "graph_vlabel RSS"

  puts "graph_category memory"

  puts "graph_args --base 1024 -l 0"

  puts "graph_scale yes"

  puts "graph_info Tracks the size of individual mongrel processes"

  mpm.get_pids.values.sort.each do |port|

    puts "mongrel_#{port}.label mongrel_#{port}"

    puts "mongrel_#{port}.info Process memory"

    puts "mongrel_#{port}.type GAUGE"

    puts "mongrel_#{port}.min 0"

  end

when "autoconf"

  if mpm.autoconf

    puts "yes"

    exit 0

  end

  puts "no"

  exit 1

else

  mpm.run

end