bin/java-heap-pcnt.sh in sensu-plugins-java-1.2.0 vs bin/java-heap-pcnt.sh in sensu-plugins-java-1.3.0

@@ -4,21 +4,25 @@
 # This was forked from Sensu Community Plugins
 
 # Date: 2013-9-30
 # Modified: Mario Harvey - badmadrad.com
 
+# Date: 2018-08-30
+# Modified: Juan Moreno Martinez - Change MAX HEAP instead Current HEAP
+
 # You must have openjdk-7-jdk and openjdk-7-jre packages installed
 # http://openjdk.java.net/install/
 
 # Also make sure the user "sensu" can sudo without password
 
 # #RED
-while getopts 'w:c:n:hp' OPT; do
+while getopts 'w:c:n:l:hp' OPT; do
   case $OPT in
     w)  WARN=$OPTARG;;
     c)  CRIT=$OPTARG;;
     n)  NAME=$OPTARG;;
+    l)  HEAP_MAX=$OPTARG;;
     h)  hlp="yes";;
     p)  perform="yes";;
     *)  unknown="yes";;
   esac
 done
@@ -30,10 +34,20 @@
         -n --> Name of JVM process < value
         -w --> Warning Percentage < value
         -c --> Critical Percentage < value
         -p --> print out performance data
         -h --> print this help screen
+        -l --> limit, valid value max or current (default current)
+               current: when -Xms and -Xmx same value
+               max: when -Xms and -Xmx have different values
+
+Requirement: User that launch script must be permisions in sudoers for jps,jstat,jmap
+sudoers lines suggested:
+----------
+sensu ALL=(ALL) NOPASSWD: /usr/bin/jps, /usr/bin/jstat, /usr/bin/jmap
+Defaults:sensu !requiretty
+----------
 "
 
 if [ "$hlp" = "yes" ]; then
   echo "$HELP"
   exit 0
@@ -51,11 +65,17 @@
     echo "$COUNT java process(es) found with name $NAME"
     exit 3
 fi
 
 #Get heap capacity of JVM
-TotalHeap=$(sudo jstat -gccapacity $PID  | tail -n 1 | awk '{ print ($4 + $5 + $6 + $10) / 1024 }')
-
+if [ "$HEAP_MAX" == "" ] || [ "$HEAP_MAX" == "current" ]; then
+  TotalHeap=$(sudo ${JAVA_BIN}jstat -gccapacity $PID  | tail -n 1 | awk '{ print ($4 + $5 + $6 + $10) / 1024 }')
+elif [[ "$HEAP_MAX" == "max" ]]; then
+  TotalHeap=$(sudo ${JAVA_BIN}jmap -heap $PID 2> /dev/null | grep MaxHeapSize | tr -s " " | tail -n1 | awk '{ print $3 /1024 /1024 }')
+else
+  echo "limit options must be max or current"
+  exit 1
+fi
 #Determine amount of used heap JVM is using
 UsedHeap=$(sudo jstat -gc $PID  | tail -n 1 | awk '{ print ($3 + $4 + $6 + $8 + $10) / 1024 }')
 
 #Get heap usage percentage
 HeapPer=$(echo "scale=3; $UsedHeap / $TotalHeap * 100" | bc -l| cut -d "." -f1)