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 root@vm:~# /usr/lib/nagios/plugins/check_open_files.sh -s java -w 25 -c 35
CRITICAL - java has 434 or 42% files open of the 1024 allowed open files! 

Code: Select all

#!/bin/sh

#   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; version 2 of the License only.
#
#   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, write to the Free Software
#   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

PROGNAME=`basename $0`
VERSION="Version 1.0"
AUTHOR="2014, Patrick Bass"

LV_W=100;
LV_C=100;


#Print Version
print_version() {
    echo "$VERSION $AUTHOR"
}

# Help
usage(){
    echo $PROGNAME $VERSION
    echo $AUTHOR
	echo 
	echo This is a Nagios plugin that will check the number of open files a service has running.
	echo 
	echo OPTIONS:
	echo  -h Shows this help
	echo  -v Shows the Version
	echo  -s sets the service whose open files you want to check
	echo  -w sets the warning level
	echo  -c sets the critical level
}

# Option selection
while getopts "hvs:w:c:" opt; do
  case $opt in
    h)
      usage
      exit
      ;;
    v)
      print_version
      exit
      ;;
	s)
	  SERVICE=$OPTARG
	  ;;
    w)
      LV_W=$OPTARG
      ;;
    c)
      LV_C=$OPTARG 
      ;;

    \?)
      echo "Invalid option: -$OPTARG" >&2
      exit 1
      ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit 1
      ;;
  esac
done

# Are the levels for warning and critical set right?
    if [ ${LV_W} -ge ${LV_C} ]
    then
        echo "Please adjust levels. The critical level must be higher than the warning level!"
	exit 666
    fi

# Lsof lists information about files opened by a processes
# print the number of bytes, words, and lines in files (-l = lines)
COUNT=$(lsof -c $SERVICE | wc -l)

# Get the value of maximum open files for each prozess and how much percent of these the service uses
MAX=$(ulimit -n)
USED=$(echo "scale=0; 100*$COUNT/$MAX" | bc -l)

# Compare the levels with the values for critical and warning

if [ $USED -ge ${LV_W} ]
    then
        if [ $USED -gt ${LV_C} ]
			then
				echo "CRITICAL - $SERVICE has $COUNT or $USED% files open of the $MAX allowed open files!"
				exit $ST_CR
			else
				echo "WARNING - $SERVICE has $COUNT or $USED% files open of the $MAX allowed open files."
				exit $ST_WR
		fi
	else
		echo "OK - $SERVICE has $COUNT or $USED% files open of the $MAX allowed open files."
        exit $ST_OK
fi