Munin contributed plugins

#!/usr/bin/env ruby

=begin

Munin Plugin for MSSQL - Data file size monitoring

Author: Wilfred Chau <openapp.developer@gmail.com>

Date: 2011-05-19

Version: 1.0

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.

Prerequistes:

	1) /etc/odbc.ini and /etc/freetds.conf

	2) rubygems

	3) ruby-dbi

Usage:

	1) copy this script to the munin install plugins directory (e.g. /usr/share/munin/plugins)

	2) chmod to allow executable to others

	3) create symbolic link in /etc/munin/plugins

           ln -s /usr/share/munin/plugins/mssql_datafilesizes.rb /etc/munin/plugins/mssql_datafilesizes.rb

Parameters:

	autoconf

	config (required)

Config variables:

	sqluser : mssql user who has view server state privilege

	sqlpass : password for the mssql user

	dsn     : datasource name as defined in /etc/odbc.ini

	instance: instance to monitor

#%# family=auto

#%# capabilities=autoconf

=end

require 'rubygems'

require 'dbi'

sqluser  = 'rubyuser'

sqlpass  = 'rubyuser'

dsn      = 'TESTSQL'

instance = 'AdventureWorks'

#

# Queries

#

#

dbh = DBI.connect("DBI:ODBC:#{dsn}", sqluser, sqlpass)

instance_name_query = "SELECT distinct instance_name

                       FROM sys.dm_os_performance_counters

		       WHERE instance_name = '#{instance}'"

transaction_query = "select cntr_value/1024.0 from sys.dm_os_performance_counters

                     where counter_name = 'Data File(s) Size (KB)'

                     and object_name = 'SQLServer:Databases'

                     and instance_name = ?"

all_instance_names = Array.new

sth = dbh.execute(instance_name_query)

sth.fetch do |row|

  all_instance_names.push(row[0].strip)

end

sth.finish

#

# autoconf

#

if ARGV[0] == "autoconf"

  if all_instance_names.length > 1 && sqluser.length > 1 && sqlpass.length > 1

    puts "yes"

  else

    puts "no"

    puts "Usage: #{__FILE__} autoconf|conf"

  end

  exit 0

#

# config definition

#

elsif ARGV[0] == "config"

  puts "graph_args --base 1024k -r --lower-limit 0"

  puts "graph_title MSSQL DB File Sizes"

  puts "graph_category db"

  puts "graph_info This graph shows DB File Sizes (MB)"

  puts "graph_vlabel MB"

  puts "graph_scale no"

  puts "graph_period second"

  all_instance_names.sort.each do |s|

    puts "#{s}.label #{s}"

    puts "#{s}.info INSTANCE: #{s}"

    puts "#{s}.type GAUGE"

    puts "#{s}.draw LINE1"

  end

  exit 0

end

#

# Getting data

#

sth = dbh.prepare(transaction_query)

all_instance_names.sort.each do |k|

  sth.execute(k)

  sth.fetch do |row|

    puts "#{k.to_s}.value #{row[0].to_s}"

  end

end

sth.finish

dbh.disconnect