Here is my /usr/lib64/nagios/plugins/check_jvm. As discussed earlier in the thread, it is the same as the one downloaded from the source site, except i set the path to JvmInspector.jar to be /usr/local/libexec rather than /usr/local/bin. I have tried copying JvmInspector.jar into /usr/local/bin and setting this script to use that one, but it makes no difference: it works when logged in as the nrpe user and running the check command directly, but not when nrpe is running as a daemon and tries to run the exact same command. Also as indicated earlier, this version has known bugs (namely, it doesn't report ok/critical values at appropriate times). But for ease of consistency and tracking down the issues with why nrpe daemon cannot sudo, this is the one i'm using for now. Later on once the sudo issue is solved i'll try my fixed version again.
Code: Select all
#!/bin/bash
# This script is Nagios plugin, part of JvmInspector tool
# Version 2014101401 (YYYYMMDDxx)
#
# Author: Dimitar Fidanov <[email protected]>
#
# The latest version can be found at:
# https://fidanov.net/c0d3/nagios-plugins/jvminspector/
#
# See README for more details
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
##############################
### PATH TO JvmInspector.jar
JVMINSPECTOR="/usr/local/libexec/JvmInspector.jar"
##############################
export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
export ENV=""
export CDPATH=""
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
MSG_OK="OK"
MSG_WARNING="WARNING"
MSG_CRITICAL="CRITICAL"
MSG_UNKNOWN="UNKNOWN"
SCRIPT_NAME=$(basename $0)
p_ok () {
echo "$MSG_OK $1"
exit "$STATE_OK"
}
p_warning () {
echo "$MSG_WARNING $1"
exit "$STATE_WARNING"
}
p_critical () {
echo "$MSG_CRITICAL $1"
exit "$STATE_CRITICAL"
}
p_unknown () {
echo "$MSG_UNKNOWN $1"
exit "$STATE_UNKNOWN"
}
usage () {
cat << EOF
This is Nagios plugin that checks local JVMs properies like heap & non-heap memory, threads and etc
Usage: $SCRIPT_NAME -n|--name <java_name> -p|--property <property> -w|--warning <warn> -c|--critical <crit>
Where: <propery> is one of: "heap|non-heap|threads|classes"
Hint: You can use "jps -l" or "java -jar JvmInspector.jar all" to get the java name
Example: $SCRIPT_NAME -n org.apache.catalina.startup.Bootstrap -p heap -w 1073741824 -c 2147483648
EOF
exit 0
}
[ "$#" -eq 0 ] && usage
while [ ! -z "$1" ]; do
case $1 in
-n|--name) shift; NAME="$1";;
-p|--property) shift; PROPERTY="$1";;
-w|--warning) shift; WARNING="$1";;
-c|--critical) shift; CRITICAL="$1";;
-h|--help) usage;;
esac
shift
done
[ -z "$NAME" ] && p_unknown "Missing JVM app class name, use -n <value>"
[ -z "$PROPERTY" ] && p_unknown "Missing property, use -p <value>"
[ -z "$WARNING" ] && p_unknown "Missing warning thresholds, use -w <value>"
[ -z "$CRITICAL" ] && p_unknown "Missing critical thresholds, use -c <value>"
expr ${WARNING} : '[0-9]\+$' >/dev/null || p_unknown "Invalid warning threshold"
expr ${CRITICAL} : '[0-9]\+$' >/dev/null || p_unknown "Invalid critical threshold"
[ -f "$JVMINSPECTOR" ] || p_unknown "Can't find JvmInspector.jar, please install it and set JVMINSPECTOR var in this script"
PSLINE="$(ps axo pid,uid,command | grep [j]ava | grep $NAME | head -1)"
PID="$(echo $PSLINE | awk '{print $1}')"
PUID="$(echo $PSLINE | awk '{print $2}')"
[ -z "${PID}" ] && p_unknown "Can't find JVM with class name: $NAME"
expr ${PID} : '[0-9]\+$' >/dev/null || p_unknown "Bug"
[ "${PUID}" = "${EUID}" ] || p_unknown "JVM is running with different username, run this script with UID $PUID"
TIMEOUT="" ; timeout --version >/dev/null 2>&1 && TIMEOUT="timeout 7"
JVMDATA="$(${TIMEOUT} java -jar ${JVMINSPECTOR} ${PID} 2>&1)"
[ $? -ne 0 ] && p_unknown "Can't connect to JVM: ${JVMDATA}"
echo "$JVMDATA" | grep "class count" >/dev/null 2>/dev/null || p_unknown "Can't connect to the JVM: $JVMDATA"
#echo "$JVMDATA" # debug
if [ "${PROPERTY}" = "threads" ]; then
RESULT="$(printf "%s" "$JVMDATA" | awk '/^ thread count/{print $3}')"
FRESULT="${RESULT}"
PERFDATA="${PROPERTY}=${RESULT};;;"
elif [ "${PROPERTY}" = "classes" ]; then
RESULT=$(printf "%s" "$JVMDATA" | awk '/^ class count/{print $3}')
FRESULT="${RESULT}"
PERFDATA="${PROPERTY}=${RESULT};;;"
elif [ "${PROPERTY}" = "heap" ]; then
TEMPDATA=$(printf "%s" "$JVMDATA" | awk 'BEGIN { FS = ": " } ;/^ heap memory/{print $2}')
MAX=$(printf "%s" "$TEMPDATA" | awk 'BEGIN { FS="|" } {print $1}' | awk 'BEGIN { FS="=" } {print $2}')
COMMITED=$(printf "%s" "$TEMPDATA" | awk 'BEGIN { FS="|" } {print $2}' | awk 'BEGIN { FS="=" } {print $2}')
USED=$(printf "%s" "$TEMPDATA" | awk 'BEGIN { FS="|" } {print $3}' | awk 'BEGIN { FS="=" } {print $2}')
RESULT="${USED}"
FRESULT=$(echo "${RESULT}" | numfmt --to=iec 2>/dev/null) || FRESULT="${RESULT}"
PERFDATA="max=${MAX};;; commited=${COMMITED};;; used=${USED};;;"
elif [ "${PROPERTY}" = "non-heap" ]; then
TEMPDATA=$(printf "%s" "$JVMDATA" | awk 'BEGIN { FS = ": " } ;/^ non-heap memory/{print $2}')
MAX=$(printf "%s" "$TEMPDATA" | awk 'BEGIN { FS="|" } {print $1}' | awk 'BEGIN { FS="=" } {print $2}')
COMMITED=$(printf "%s" "$TEMPDATA" | awk 'BEGIN { FS="|" } {print $2}' | awk 'BEGIN { FS="=" } {print $2}')
USED=$(printf "%s" "$TEMPDATA" | awk 'BEGIN { FS="|" } {print $3}' | awk 'BEGIN { FS="=" } {print $2}')
RESULT="${USED}"
FRESULT=$(echo "${RESULT}" | numfmt --to=iec 2>/dev/null) || FRESULT="${RESULT}"
PERFDATA="max=${MAX};;; commited=${COMMITED};;; used=${USED};;;"
elif [ "${PROPERTY}" = "sessions" ]; then
RESULT=$(printf "%s" "$JVMDATA" | awk '/^ active sessions/' | sed 's/^.*total\=\([0-9]*\)|.*$/\1/g')
FRESULT="${RESULT}"
PERFDATA="sessions=${RESULT};;;"
else
p_unknown "Invalid property"
fi
[ -z ${RESULT} ] && p_unknown "Invalid data"
expr ${RESULT} : '-\?[0-9]\+$' >/dev/null || p_unknown "Invalid data"
if [ "${RESULT}" -ge "$CRITICAL" ]; then
p_critical "${FRESULT} |${PERFDATA}"
elif [ "${RESULT}" -ge "$WARNING" ]; then
p_warning "${FRESULT} |${PERFDATA}"
else
p_ok "${FRESULT} |${PERFDATA}"
fi
exit 0
