133 lines
3.6 KiB
Bash
Executable File
133 lines
3.6 KiB
Bash
Executable File
#!/bin/sh
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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/)
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# Sun JDK 8.0 (http://java.sun.com/javase/)
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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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get_jdk_type() {
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local version
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if "${JAVA_HOME}/bin/java" -version 2>&1 | grep -qi 'jrockit'; then
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echo "bea"
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else
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version=$("${JAVA_HOME}/bin/java" -version 2>&1 | grep '^java version' | awk '{print $3}' | sed -e 's/\"//g' | cut -d'_' -f 1)
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if echo "$version" | grep -q '^1\.5\.'; then
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echo "sun15"
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else
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echo "sun"
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fi
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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 = $5; print "Young_GC.value " YGC; print "Old_GC.value " FGC; }'
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elif [ "${JDK_TYPE}" = "sun15" ]; then
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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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else
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# example output of jstat for Java 1.8:
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# S0C S1C S0U S1U EC EU OC OU MC MU CCSC CCSU YGC YGCT FGC FGCT GCT
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# 2048.0 2048.0 0.0 1344.0 694784.0 145013.5 1398272.0 414857.1 102400.0 96308.0 12544.0 11240.1 979 20.997 5 2.705 23.702
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# shellcheck disable=SC2016
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awk_script='{ YGC = $13; FGC = $15; print "Young_GC.value " YGC; print "Full_GC.value " FGC; }'
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fi
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"${JAVA_HOME}/bin/jstat" -gc "$pid_num" | tail -1 | awk "$awk_script"
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}
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#
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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 ${JAVA_HOME}/bin)"
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elif [ ! -f "$pidfilepath" ]; then
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echo "no (missing file $pidfilepath)"
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elif [ ! -r "$pidfilepath" ]; then
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echo "no (cannot read $pidfilepath)"
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else
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echo "yes"
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fi
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exit 0
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fi
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JDK_TYPE=$(get_jdk_type)
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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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