Munin contributed plugins

#!/bin/zsh

#

# Created by Jan Rękorajski <baggins@pld-linux.org> based on vserver_cpu_ plugin.

#

# Obtained from https://github.com/munin-monitoring/contrib.git

#

# Changes by Andras Korn, 2015:

#

#  * Convert to zsh

#  * Fix to remove dots from vserver names (replace them with _)

#  * Drop support for old (pre 2.6.19) kernels

#  * Replace cat | grep | cut pipelines with a single sed

#  * Add env.stripdomain (a domain name to strip from the

#    end of vserver names when generating labels; be sure

#    to include the leading dot)

#

# Graph Vserver cumulative 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

VSERVERS=(${=vservers})

STRIPDOMAIN="$stripdomain"

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

NAMELOC="nsproxy"

if [[ -z "$VSERVERS" ]] ; then

    cd /proc/virtual

    XIDS=($(echo *(/)))

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 /proc/virtual/*(/) -type d; do

	    	if [[ "$i" = $(sed -n '/NodeName/s/^NodeName:[[:space:]]*//p' $j/$NAMELOC) ]]; then

		    XIDS=($XIDS[@] ${j:t})

		fi

	    done

	fi

    done

fi

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

	echo 'graph_category virtualization'

	echo 'graph_args --base 1000'

	echo 'graph_title Vserver cpu usage'

	echo 'graph_vlabel jiffies used per ${graph_period}'

	echo 'graph_info Shows jiffies used on each vserver.'

	for i in $XIDS[@]; do

		LABEL=$(sed -n '/NodeName/s/^NodeName:[[:space:]]*//p' /proc/virtual/$i/$NAMELOC)

		LABEL=${LABEL%$STRIPDOMAIN}

		NAME=${LABEL//./_}

		NAME=${NAME//-/_}

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

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

		echo "${NAME}_hold.type COUNTER"

		echo "${NAME}_scpu.label system cpu usage for $LABEL"

		echo "${NAME}_scpu.info system cpu usage for $LABEL."

		echo "${NAME}_scpu.type COUNTER"

		echo "${NAME}_ucpu.label user cpu usage for $LABEL"

		echo "${NAME}_ucpu.info user cpu usage for $LABEL."

		echo "${NAME}_ucpu.type COUNTER"

	done

	exit 0

fi

for i in $XIDS[@]; do

	LABEL=$(sed -n '/NodeName/s/^NodeName:[[:space:]]*//p' /proc/virtual/$i/$NAMELOC)

	LABEL=${LABEL%$STRIPDOMAIN}

	NAME=${LABEL//./_}

	NAME=${NAME//-/_}

	awk -v name=$NAME -v u=0 -v s=0 -v h=0 '

		/^cpu [0-9]+:/ { u+=$3; s+=$4; h+=$5}

		END {

			print name "_hold.value " h

			print name "_scpu.value " s

			print name "_ucpu.value " u

		}' /proc/virtual/$i/sched

done