Munin contributed plugins

#!/bin/bash

#

# Plugin for monitor JVM activity - GC Count -

#

# Usage:

#

#       Symlink into /etc/munin/plugins/ and add the monitored

#	alias name like :

#

#       ln -s /usr/share/munin/plugins/jstat__gccount \

#	  /etc/munin/plugins/jstat_<jvm alias>_gccount

#       This should, however, be given through autoconf and suggest.

#

# Requirements:

#

#	You need to execute your Java program under jsvc provided by

#	  http://jakarta.apache.org/commons/daemon/

#	which enables you to run your Java program with specified

#	pid file with -pidfile option.

#       A Brief setup documentation is also available at

#         http://tomcat.apache.org/tomcat-5.5-doc/setup.html

#

# Target:

#

#	Target Java Virtual Machine to monitor are:

#	  Sun JDK 5.0 (http://java.sun.com/javase/) (default)

#	  BEA JRockit 5.0 (http://dev2dev.bea.com/jrockit/)

#

# Parameters:

#

#       config   (required)

#

# Config variables:

#

#       pidfilepath  - Which file path use. Defaults to '/var/run/jsvc.pid'

#       javahome     - Defaults to '/usr/local/java/jdk'

#

DefaultPidFile="/var/run/jsvc.pid"

DefaultJavaHome="/usr/local/java/jdk"

#

# Environment Variables

#

if [ -z "${pidfilepath}" ]; then

  pidfilepath="${DefaultPidFile}"

fi

if [ -z "${graphtitle}" ]; then

  graphtitle="${pidfilepath}"

fi

if [ -z "${javahome}" ]; then

  JAVA_HOME="${DefaultJavaHome}"

else

  JAVA_HOME="${javahome}"

fi

export JAVA_HOME

#

# Functions

#

chk_jdk()

{

  isJRockit=`${JAVA_HOME}/bin/java -version 2>&1 | egrep -i 'jrockit'`

  if [ -n "${isJRockit}" ]; then

    JDK_TYPE="bea"

  else

    JDK_TYPE="sun"

  fi

}

chk_version()

{

  Version=`${JAVA_HOME}/bin/java -version 2>&1 | egrep '^java version' | awk '{print $3}' | sed -e 's/\"//g' | cut -d'_' -f 1`

  if [ "${Version}" != "1.5.0" ]; then

    return 1

  else

    return 0

  fi

}

config_common()

{

  echo 'graph_title GC Count' $graphtitle

  echo 'graph_args -l 0'

  echo 'graph_vlabel GC Count(times)'

  echo 'graph_total total'

  echo 'graph_info GC Count'

  echo 'graph_category JVM'

}

config_sun_jdk()

{

  config_common

  echo 'Young_GC.label Young_GC'

  echo 'Young_GC.min 0'

  echo 'Full_GC.label Full_GC'

  echo 'Full_GC.min 0'

}

config_bea_jdk()

{

  config_common

  echo 'Young_GC.label Young_GC'

  echo 'Young_GC.min 0'

  echo 'Old_GC.label Old_GC'

  echo 'Old_GC.min 0'

}

print_sun_stats()

{

${JAVA_HOME}/bin/jstat -gc ${PidNum} | tail -1 | awk \

'{\

        S0C = $1; \

        S1C = $2; \

        S0U = $3; \

        S1U = $4; \

        EC  = $5; \

        EU  = $6; \

        OC  = $7; \

        OU  = $8; \

        PC  = $9; \

        PU  = $10; \

        YGC  = $11; \

        YGCT  = $12; \

        FGC  = $13; \

        FGCT  = $14; \

        GCT  = $15; \

        \

        S0F = S0C - S0U; \

        S1F = S1C - S1U; \

        EF  = EC  - EU;  \

        OF  = OC  - OU;  \

        PF  = PC  - PU;  \

        \

        print "Young_GC.value " YGC; \

        print "Full_GC.value " FGC; \

}'

}

print_bea_stats()

{

${JAVA_HOME}/bin/jstat -gc ${PidNum} | tail -1 | awk \

'{\

	HeapSize = $1; \

	NurserySize = $2; \

	UsedHeapSize = $3; \

	YC = $4; \

	OC = $5; \

	YCTime = $6; \

	OCTime = $7; \

	GCTime = $8; \

	YCPauseTime = $9; \

	OCPauseTime = $10; \

	PauseTime = $11; \

	Finalizers = $12; \

	\

	print "Young_GC.value " YC; \

	print "Old_GC.value " OC;\

}'

}

#

# common for all argument

#

chk_jdk

#

# autoconf

#

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

  if [ ! -x "${JAVA_HOME}/bin/jstat" ]; then

    echo "no (No jstat found in ${JAVA_HOME}/bin)"

    exit 1

  fi

  chk_version

  if [ $? != 0 ]; then

    echo "no (Java version is invalid)"

    exit 1

  fi

  if [ ! -f "${pidfilepath}" -o ! -r "${pidfilepath}" ]; then

    echo "no (No such file ${pidfilepath} or cannot read ${pidfilepath}"

    exit 1

  fi

  echo "yes"

  exit 0

fi

#

# config

#

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

  if [ "${JDK_TYPE}" == "bea" ]; then

    config_bea_jdk

  else

    config_sun_jdk

  fi

  exit 0

fi

#

# Main

#

PidNum=`cat ${pidfilepath}`

if [ "${JDK_TYPE}" == "bea" ]; then

  print_bea_stats

else

  print_sun_stats

fi