bin/metrics-java-heap-graphite.sh
#!/usr/bin/env bash
#
# Collect metrics on your JVMs and allow you to trace usage in graphite
# Modified: Mario Harvey - badmadrad.com
# Date: 2017-06-06
# Modified: Nic Scott - re-work to be java version agnostic
# Date: 2018-08-30
# Modified: Juan Moreno Martinez - Add MAX HEAP metric and fix bug java agnostic
# depends on jps and jstat in openjdk-devel in openjdk-<VERSION>-jdk and
# openjdk-<VERSION>-jre packages being installed
# http://openjdk.java.net/install/
# Also make sure the user "sensu" can sudo jps and jstat without password
while getopts 's:n:h' OPT; do
case $OPT in
s) SCHEME=$OPTARG;;
n) NAME=$OPTARG;;
h) hlp="yes";;
esac
done
#usage
HELP="
usage $0 [ -n value -s value -h ]
-n --> NAME or name of jvm process < value
-s --> SCHEME or server name ex. :::name::: < value
-h --> print this help screen
"
if [ "$hlp" = "yes" ]; then
echo "$HELP"
exit 0
fi
SCHEME=${SCHEME:=0}
NAME=${NAME:=0}
JAVA_BIN=${JAVA_BIN:=""}
#Get PID of JVM.
#At this point grep for the name of the java process running your jvm.
PIDS=$(sudo ${JAVA_BIN}jps $OPTIONS | grep " $NAME$" | awk '{ print $1 }')
COUNT=$(echo $PID | wc -w)
for PID in $PIDS
do
project=$(sudo jps | grep $PID | awk '{ print $2 }' | cut -d. -f1)
JSTAT=$(sudo ${JAVA_BIN}jstat -gc $PID | tail -n 1)
# Java version indifferent memory stats
#Determine MaxHeap
MaxHeap=$(sudo jmap -heap $PID 2> /dev/null | grep MaxHeapSize | tr -s " " | tail -n1 | awk '{ print $3 /1024 /1024 }')
#Determine Old Space Utilization
OldGen=$(echo $JSTAT | awk '{ print ($8) / 1024 }')
#Determine Eden Space Utilization
ParEden=$(echo $JSTAT | awk '{ print ($6) / 1024 }')
#Determine Survivor Space utilization
ParSurv=$(echo $JSTAT | awk '{ print ($3 + $4) / 1024 }')
# Java version-specific memory stats
# Java 8 jstat -gc returns 17 columns Java 7 returns 15
if [[ $(echo $JSTAT| wc -w) -gt 15 ]]; then
# Metaspace is NOT a part of heap in Java 8
#Get heap capacity of JVM
TotalHeap=$(echo $JSTAT | awk '{ print ($1 + $2 + $5 + $7) / 1024 }')
#Determine amount of used heap JVM is using
UsedHeap=$(echo $JSTAT | awk '{ print ($3 + $4 + $6 + $8) / 1024 }')
#Get MetaSpace capacity of JVM
TotalMeta=$(echo $JSTAT | awk '{ print ($9) / 1024 }')
#Determine Meta Space Utilization
UsedMeta=$(echo $JSTAT | awk '{ print ($10) / 1024 }')
echo "JVMs.$SCHEME.$project.Meta_Capacity $TotalMeta `date '+%s'`"
echo "JVMs.$SCHEME.$project.Meta_Util $UsedMeta `date '+%s'`"
else
# PermGen IS part of heap in Java <8
#Get heap capacity of JVM
TotalHeap=$(echo $JSTAT | awk '{ print ($1 + $2 + $5 + $7 + $9) / 1024 }')
#Determine amount of used heap JVM is using
UsedHeap=$(echo $JSTAT | awk '{ print ($3 + $4 + $6 + $8 + $10) / 1024 }')
#Get PermGen capacity of JVM
TotalPerm=$(echo $JSTAT | awk '{ print ($9) / 1024 }')
#Determine PermGen Space Utilization
UsedPerm=$(echo $JSTAT | awk '{ print ($10) / 1024 }')
echo "JVMs.$SCHEME.$project.Perm_Capacity $TotalPerm `date '+%s'`"
echo "JVMs.$SCHEME.$project.Perm_Util $UsedPerm `date '+%s'`"
fi
echo "JVMs.$SCHEME.$project.Max_Heap $MaxHeap `date '+%s'`"
echo "JVMs.$SCHEME.$project.Committed_Heap $TotalHeap `date '+%s'`"
echo "JVMs.$SCHEME.$project.Heap_Util $UsedHeap `date '+%s'`"
echo "JVMs.$SCHEME.$project.Eden_Util $ParEden `date '+%s'`"
echo "JVMs.$SCHEME.$project.Survivor_Util $ParSurv `date '+%s'`"
echo "JVMs.$SCHEME.$project.Old_Util $OldGen `date '+%s'`"
done