Munin contributed plugins

#!/bin/sh

#

# Copyright (C) 2006-2008 Holger Levsen and 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 cpu usage stats

#

# Configuration variables

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

#

# NOTE: If no configuration variable is set, the default will be used

#

# see vserver_resources for example uses of configuration files

#

# or links to define what to monitor:

# vserver_cpu_		-> monitor cpu usage of all vservers on all cpus

# vserver_hold_		-> monitor hold on all vservers on all cpus

# vserver_hold_0 	-> monitor hold on all vservers on cpu0

# vserver_hold_1 	-> monitor hold on all vservers on cpu1

# vserver_hold_foo 	-> monitor hold on all cpus on vserver named foo

# vserver_sys_foo 	-> monitor cpu usage on all cpus on vserver named foo

# Changelog    

# version 0.2 - 2006 October 02 Holger Levsen <debian@layer-acht.org>

# - label fixed: we measure jiffies not seconds

# - Fix error that results if NodeName is set to include a domain name 

# - Fix hypens in NodeNames, replace them with underscores

# - whitespace cleanup 

# version 0.3 - 2006 October 07 Holger Levsen <debian@layer-acht.org>

# - rewrite of vserver_usercpu

# - smp-aware

# - can display hold too (third value in the cpu line(s) of /proc/virtual/<xid>/sched)

# - no seperation between user and system cpu anymore

#  - handle identical vserver-names by using the vserver-id internally

# version 0.4 - 2007, October 07

# Micah Anderson <micah@riseup.net>

#  - fixed variable name (thanks pietro)

# version 0.5 - 2008, July 07

# Micah Anderson <micah@riseup.net>

#  - fixed number of CPU regexp to be more accurate

#  - added $NAMELOC - fixes plugin so it works with VCI_SPACES (> 2.6.19) as well as older version

# TODO:

# - comment the code or go mad

# - add info how many jiffies per second are available on a machine

# - user and system cpu are always added to each other, make it optional to split them?

# - use /proc less often (100 times more overhead than talking to the kernel directly)

#      i.e. use something like pagesize=`perl -MPOSIX -e 'print POSIX::sysconf(_SC_PAGESIZE), "\n";'`

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 by linking but not in the configuration-file by name

    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

BASEPARAM=`basename $0 | sed 's/^vserver_//'`

MODE=`echo $BASEPARAM | sed 's/^hold.*//'`

#debug=true

if [ -z "$MODE" ] ; then

	MODE=hold

	TARGET=`echo $BASEPARAM | sed 's/^hold_//'`

else 

	MODE=cpu

	TARGET=`echo $BASEPARAM | sed 's/^cpu_//'`

fi

CPU1=0

if [ -n "$TARGET" ] ; then

	if [ "${#TARGET}" == 1 ] ; then 

		if [ $debug ] ; then echo $MODE, only on cpu $TARGET, for all vservers ; fi

		WHAT=ALLVSERVER

		CPU1=$TARGET

	else 

		if [ $debug ] ; then echo $MODE on all cpus together, only for vserver $TARGET ; fi

		WHAT=VSERVER

	fi

else

	if [ $debug ] ; then echo $MODE for all cpus, for all vservers ; fi

	WHAT=ALLVSERVER

fi

CPUS=$[ `grep ^processor /proc/cpuinfo|wc -l` -1 ]

CPUS=`seq $CPU1 $CPUS`

if [ $debug ] ; then

	echo cpus= $CPUS

	echo baseparam= $BASEPARAM

	echo mode= $MODE 

	echo target= $TARGET

	echo what= $WHAT

fi

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

	echo 'graph_category vserver'

	echo 'graph_args --base 1000'

	if [ "$MODE" == "cpu" ] ; then

		echo 'graph_title Vserver cpu usage'

		echo 'graph_vlabel jiffies used per cpu per ${graph_period}'

		echo 'graph_info Shows jiffies used per cpu on each vserver.'

	else

		echo 'graph_title Vserver cpu on hold'

		echo 'graph_vlabel jiffies on hold per cpu per ${graph_period}'

		echo 'graph_info Shows jiffies on hold used per cpu on each vserver.'

	fi

 	for j in $CPUS ; do 

		A=0

	        for i in $XIDS ; do 

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

			if [ "$WHAT" == "ALLVSERVER" ] || [ "$TARGET" == "$LABEL" ] ; then

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

	    			if [ "$MODE" == "cpu" ] ; then

					echo "${NAME}_$j.label cpu usage for cpu $j on $LABEL"

					echo "${NAME}_$j.info cpu usage for cpu $j on $LABEL."

				else 

					echo "${NAME}_$j.label on hold for cpu $j on $LABEL"

					echo "${NAME}_$j.info on hold for cpu $j on $LABEL."

				fi

				echo "${NAME}_$j.type COUNTER"

				if [ "$A" == 0 ] ; then 

					echo "${NAME}_$j.draw AREA"

					A=1

				else

					echo "${NAME}_$j.draw STACK"

 				fi

			fi

		done

	done

	exit 0

fi

for j in $CPUS ; do 

	for i in $XIDS ; do

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

		if [ "$WHAT" == "ALLVSERVER" ] || [ "$TARGET" == "$LABEL" ] ; then

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

			echo -n "${NAME}_$j.value "

			if [ "$MODE" == "cpu" ] ; then

				USERCPU=`cat /proc/virtual/$i/sched |grep "cpu $j"| cut -d' ' -f3`

				SYSCPU=`cat /proc/virtual/$i/sched |grep "cpu $j"| cut -d' ' -f4`

	 			echo $[$USERCPU + $SYSCPU]

			else

				cat /proc/virtual/$i/sched |grep "cpu $j"| cut -d' ' -f5

			fi

		fi	

	done

done