#!/bin/sh
#
# Copyright (C) 2006 Holger Levsen
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2 dated June,
# 1991.
#
# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
# Configuration variables
#   vservers - specify the vservers to include in the graph (default: all)
#   limits - if true, turn on limit graphing (default: false)
#
# NOTE: If no configuration variables are set, the defaults will be used

# Example /etc/munin/plugin-conf.d/munin-node 
#
# The first group monitors the vservers named "vserver1 vserver2
# vserver3 vserver4" and looks to see if the resource limit has been
# breached, if so it sends a message to nagios via send_nsca, and
# sends an email to notify that this has happened.
#
# The second monitors the vservers "vserver5 vserver6 vserver7" and 
# has no limit notifications turned on.
#
# The third monitors all vservers on the system, in one graph, and it has
# no limit notifications defined.
#
# You can use any combination of these to fit your needs.
#
#
# [vsrmem_group1]
# user root
# env.vservers vserver1 vserver2 vserver3 vserver4
# env.limits 1
# contacts nagios email
# contact.nagios.command /usr/bin/send_nsca -H your.nagios-host.here -c /etc/send_nsca.cfg
# contact.email.command mail -s "Munin-notification for ${var:group} :: ${var:host}" your@email.address.here
#
# [vsrmem_group2]
# user root
# env.vservers vserver5 vserver6 vserver7
# env.limits 0
#
# [vserver_rmemory]
# user root
#
# Graph Vserver RSS usage and limits
#
# Changelog
# version 0.1 - 2006 April xx - Holger Levsen
#  - initial author
# version 0.2 - 2006 April 24 - Micah Anderson <micah@riseup.net>
#  - Add dynamic arch page size determination
#  - Some cleanup and clarification
# version 0.3 - 2006 May 3 - Micah Anderson <micah@riseup.net>
#  - Add ability to group vservers via environment vars
#  - Fix missing close quotes and standardize indents
#  - Add limit notification
#  - Update documentation to include info on groups and limits
# version 0.4 - 2006 Jun 22 - Micah Anderson <micah@riseup.net>
#  - Fix error that results if NodeName is set to include a domain name

if [ "$1" = "config" ]; then
	echo "graph_title VM by Process"
	echo 'graph_args --base 1024k'
	echo 'graph_vlabel VM size'
	echo 'graph_category system'
	echo "graph_info Shows contribution of each process to VM size"

	ps auxww | perl '
		$junk = <>;
		while (<>)
		{
			@a = split;
			$proc = $a[10];
			$proc =~ s|.*/||;
			$proc =~ s/:.*//;
			$proc =~ tr/[]//d;
			$proc =~ tr/A-Za-z0-9/_/c;
			$vsz = $a[4];
			$total{$proc} += $vsz;
		}
		my $stack = 0;
		sub draw() { return $stack++ ? "STACK" : "AREA" }
		print map
		{
			"$_.label $_\n" .
			"$_.min 0\n" .
			"$_.draw " . draw() . "\n" .
			"$_.cdef $_,1024,*\n"
		}
		sort keys %total;
		'
	exit 0
else
	ps auxww | perl -e '
		$junk = <>;
		while (<>)
		{
			@a = split;
			$proc = $a[10];
			$proc =~ s|.*/||;
			$proc =~ s/:.*//;
			$proc =~ tr/[]//d;
			$proc =~ tr/A-Za-z0-9/_/c;
			$vsz = $a[4];
			$total{$proc} += $vsz;
		}
		print map {"$_.value $total{$_}\n"} sort keys %total'
fi