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contrib-munin/plugins/thin/thin_threads

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#!/usr/bin/env ruby
# thin_threads -
# A munin plugin for Linux to monitor how many threads per thin process
#
# For Linux ONLY !
# DOES NOT WORK on OSX, Solaris or BSD.
# only linux, because this script relies on proc filesystem
#
# Original author:
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# Frederico de Souza Araujo - fred.the.master@gmail.com
# http://www.frederico-araujo.com
#
# Usurper:
# Adam Michel - elfurbe@furbism.com
# http://www.furbism.com
#
# Originally based on:
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# thin_process_memory -
# A munin plugin to monitor memory size of
# each individual thin process
# by 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.
#
#
#%# family=auto
#%# capabilities=autoconf
module Munin
class ThinThreads
def run
pids = get_pids()
pids.sort.each do |pid|
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res = (get_threads(pid).to_i)
puts "thin_#{pid}.value #{res}"
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end
end
# only get threads count for each pid
# Using Proc filesystem
# ONLY LINUX! because relies on proc filesystem
# TODO: make this work on OSX and Solaris,
# so the whole unix gang is happy ;)
def get_threads(pid)
res = `grep "Threads" /proc/#{pid}/status`.split[1]
if res.match("cannot access")
return nil
else
return res
end
end
# Get pis using lsof (list open files)
# look for listening tcp applications
# that match the name thin
def get_pids
pids = `pgrep thin`.split
end
def autoconf
get_pids().length > 0
end
end
end
mpm = Munin::ThinThreads.new
case ARGV[0]
when "config"
puts "graph_title Thin Threads"
puts "graph_vlabel Threads"
puts "graph_category Thin"
puts "graph_args -l 0"
puts "graph_scale yes"
puts "graph_info Tracks how many threads per thin processes"
mpm.get_pids.sort.each do |pid|
puts "thin_#{pid}.label thin_#{pid}"
puts "thin_#{pid}.info Threads per Thin process"
puts "thin_#{pid}.type GAUGE"
puts "thin_#{pid}.min 0"
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end
when "autoconf"
if mpm.autoconf
puts "yes"
exit 0
end
puts "no"
exit 1
else
mpm.run
end