mirror of
https://github.com/munin-monitoring/contrib.git
synced 2018-11-08 00:59:34 +01:00
139 lines
3.2 KiB
Bash
Executable File
139 lines
3.2 KiB
Bash
Executable File
#!/bin/bash
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#
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# Plugin for monitor JVM activity - GC Count -
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#
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# Usage:
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#
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# Symlink into /etc/munin/plugins/ and add the monitored
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# alias name like :
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#
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# ln -s /usr/share/munin/plugins/jstat__gccount \
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# /etc/munin/plugins/jstat_<jvm alias>_gccount
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# This should, however, be given through autoconf and suggest.
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#
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# Requirements:
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#
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# You need to execute your Java program under jsvc provided by
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# http://jakarta.apache.org/commons/daemon/
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# which enables you to run your Java program with specified
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# pid file with -pidfile option.
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# A Brief setup documentation is also available at
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# http://tomcat.apache.org/tomcat-5.5-doc/setup.html
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#
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# Target:
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#
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# Target Java Virtual Machine to monitor are:
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# Sun JDK 5.0 (http://java.sun.com/javase/) (default)
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# BEA JRockit 5.0 (http://dev2dev.bea.com/jrockit/)
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#
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# Parameters:
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#
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# config (required)
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#
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# Config variables:
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#
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# pidfilepath - Which file path use. Defaults to '/var/run/jsvc.pid'
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# javahome - override automatic detection of JRE directory
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# graphtitle - Title of the graph (defaults to PID file location)
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#
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default_java_home=/usr/lib/jvm/default-java
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[ -e "$default_java_home" ] || default_java_home=/usr/local/java/jdk
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pidfilepath=${pidfilepath:-/var/run/jsvc.pid}
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graphtitle=${graphtitle:-$pidfilepath}
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JAVA_HOME=${javahome:-$default_java_home}
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export JAVA_HOME
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#
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# Functions
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#
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chk_jdk()
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{
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isJRockit=`${JAVA_HOME}/bin/java -version 2>&1 | egrep -i 'jrockit'`
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if [ -n "${isJRockit}" ]; then
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JDK_TYPE="bea"
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else
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JDK_TYPE="sun"
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fi
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}
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chk_version()
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{
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Version=`${JAVA_HOME}/bin/java -version 2>&1 | egrep '^java version' | awk '{print $3}' | sed -e 's/\"//g' | cut -d'_' -f 1`
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if [ "${Version}" != "1.5.0" ]; then
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return 1
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else
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return 0
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fi
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}
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print_config() {
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echo 'graph_title GC Count' $graphtitle
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echo 'graph_args -l 0'
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echo 'graph_vlabel GC Count(times)'
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echo 'graph_total total'
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echo 'graph_info GC Count'
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echo 'graph_category virtualization'
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echo 'Young_GC.label Young_GC'
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echo 'Young_GC.min 0'
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if [ "${JDK_TYPE}" == "bea" ]; then
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echo 'Old_GC.label Old_GC'
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echo 'Old_GC.min 0'
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else
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echo 'Full_GC.label Full_GC'
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echo 'Full_GC.min 0'
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fi
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}
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print_stats() {
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local pid_num="$1"
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local awk_script
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if [ "${JDK_TYPE}" == "bea" ]; then
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# shellcheck disable=SC2016
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awk_script='{ YC = $4; OC = $5; print "Young_GC.value " YGC; print "Old_GC.value " FGC; }'
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else
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# shellcheck disable=SC2016
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awk_script='{ YGC = $11; FGC = $13; print "Young_GC.value " YGC; print "Full_GC.value " FGC; }'
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fi
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"${JAVA_HOME}/bin/jstat" -gc "$pid_num" | tail -1 | awk "$awk_script"
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}
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chk_jdk
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#
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# autoconf
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#
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if [ "$1" = "autoconf" ]; then
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if [ ! -x "${JAVA_HOME}/bin/jstat" ]; then
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echo "no (No jstat found in ${JAVA_HOME}/bin)"
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exit 1
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fi
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chk_version
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if [ $? != 0 ]; then
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echo "no (Java version is invalid)"
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exit 1
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fi
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if [ ! -f "${pidfilepath}" -o ! -r "${pidfilepath}" ]; then
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echo "no (No such file ${pidfilepath} or cannot read ${pidfilepath}"
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exit 1
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fi
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echo "yes"
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exit 0
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fi
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if [ "$1" = "config" ]; then
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print_config
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exit 0
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fi
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print_stats "$(cat "$pidfilepath")"
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