Munin contributed plugins

#!/bin/sh

#

# Copyright (C) 2007 Andrei Morgan

# Copyright (C) 2008 Micah Anderson

#

# 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.

# Graph Vserver load average

# 

# Configuration variables

#   vservers - specify the vservers to include in the graph (default: all)

#

# NOTE: If no configuration variables are set, the defaults will be used

# Example  /etc/munin/plugin-conf.d/munin-node 

#

# The following monitors the load average for vservers 1 and 3:

#

# [vserver_loadavg]

# user root

# env.vservers vserver1 vserver3

# Changelog

# version 0.1 - 2007 June 26

# Andrei Morgan <asm-debian@fifthhorseman.net>

#  - initial author, based upon vserver_resources by Holger Levsen and

#    Micah Anderson, and upon the examples in the munin wiki.

# version 0.2 - 2008 July 7

# Micah Anderson <micah@riseup.net>

#  - fix cvirt vs. nsproxy issue with newer kernels by adding $NAMELOC which

#    is aware of VCI_SPACES (> 2.6.19) as well as the older version

# If run with the "autoconf"-parameter, give our opinion on whether we

# should be run on this system or not. This is optional, and only used by

# munin-config. In the case of this plugin, we should most probably

# always be included whwn there is a vserver kernel.

if [ "$1" = "autoconf" ]; then

        echo yes

        exit 0

fi

# if vservers are specified, use them; the default is to use all.

VSERVERS="$vservers"

INFO=(`sed 's/.*:\t//' /proc/virtual/info 2>/dev/null || echo '<none>'`)

KCIN="$[ 16#${INFO[2]} ]";

# If this is 1, then VCI_SPACES is present in the kernel (new in 2.6.19)

if [ $[ (KCIN >> 10) & 1 ] -eq 1 ]

then 

    NAMELOC="nsproxy"

else 

    NAMELOC="cvirt"

fi

if [ -z "$VSERVERS" ] ; then

    XIDS=`find /proc/virtual/* -type d -exec basename {} \;`

else

    # it's really more performant to specify vservers by ids or not at all

    XIDS=""

    for i in $VSERVERS ; do

	if [ -d /proc/virtual/$i ] ; then

	    XIDS="${XIDS}${i} "

	else

	    for j in `find /proc/virtual/* -type d -exec basename {} \;` ; do

		if [ "$i" = "`cat /proc/virtual/$j/$NAMELOC |grep NodeName |cut -f2`" ] ; then

		    XIDS="${XIDS}${j} "

		fi

	    done

	fi

    done

fi

# If run with the "config"-parameter, give out information on how the

# graphs should look.  

if [ "$1" = "config" ]; then

        # The title of the graph

	echo 'graph_title loadavg of vserver'

        # Arguments to "rrdtool graph". In this case, tell it that the

        # lower limit of the graph is '0', and that 1k=1000 (not 1024)

	echo 'graph_args --base 1000 -l 0'

        # We want Cur/Min/Avg/Max unscaled (i.e. 0.42 load instead of

        # 420 milliload)

	echo 'graph_scale no'

        # The Y-axis label

	echo 'graph_vlabel loadavg'

	# graph information for the main table

	echo 'graph_info Shows 5-minute load average per vserver.'

        # Graph category. Defaults to 'other'

	echo 'graph_category vserver'

	for xid in $XIDS ; do

	# Specify the vservers

		LABEL=`cat /proc/virtual/$xid/$NAMELOC |grep NodeName |cut -f2`

		NAME=`echo $LABEL | cut -d. -f1 |  tr '-' '_'`

		echo "$NAME.label $LABEL: load average"

		echo "$NAME.info $NAME average load for the past 5 minutes"

	done 

        # Last, if run with the "config"-parameter, quit here (don't

        # display any data)

        exit 0

fi

for xid in $XIDS ; do

	LABEL=`cat /proc/virtual/$xid/$NAMELOC |grep NodeName |cut -f2`

	NAME=`echo $LABEL | cut -d. -f1 |  tr '-' '_'`

	echo -n "$NAME.value ";

	cat /proc/virtual/$xid/cvirt | grep loadavg: | cut -d' ' -f2	

done