Munin contributed plugins

#!/bin/bash

#

# Monitors memory usage in openVZ or Virtuozzo

# based on http://www.huschi.net/archiv/speicher-anzeigen-mit-vzfree.html

# Author: Michael Richter, http://osor.de/ 

# Cleaned up and translated to english by: Marian Sigler <m@qjym.de>, 2010-08-13

#

#%# capabilities=autoconf

BEANCOUNTERS=/proc/user_beancounters

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

    if [ -e $BEANCOUNTERS ]; then

        echo yes

        exit 0

    else

        echo no

        exit 1

    fi

fi

if [ ! -r $BEANCOUNTERS ]; then

    echo "$BEANCOUNTERS not readable" >&2

    exit 1

fi

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

    limit=$(awk '/privvmpages/ {print $5*4096}' $BEANCOUNTERS)

    cut -c9- <<EOF

        graph_args --base 1024 -l 0 --vertical-label bytes --upper-limit $limit

        graph_title VPS memory usage

        graph_category system

        graph_info Shows memory usage and VPS memory limits.

        graph_order maxheld held oomguar barrier limit

        held.label held

        held.draw AREA

        held.info currently held memory

        maxheld.label maxheld

        maxheld.draw AREA

        maxheld.info maximum held memory

        oomguar.label guaranteed

        oomguar.draw LINE2

        oomguar.info memory guaranteed for OOM

        barrier.label barrier

        barrier.draw LINE2

        barrier.info memory usage barrier

        limit.label limit

        limit.draw LINE2

        limit.info memory usage limit

EOF

    exit 0

fi

if [ -n "$1" ]; then

    echo "Invalid argument: $1" >&2

    exit 1

fi

awk '/privvmpages/ {print "held.value", $2*4096 "\nmaxheld.value", $3*4096 "\nbarrier.value", $4*4096 "\nlimit.value", $5*4096}' $BEANCOUNTERS

awk '/oomguarpages/ { print "oomguar.value", $4*4096 }' $BEANCOUNTERS