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#!/bin/bash
# ==============================================================================
# CPU Utilization Statistics plugin for Nagios
#
# Written by : Steve Bosek
# Patched by : Bas van der Doorn,Philipp Lemke
# Release : 2.3.6
# Creation date : 8 September 2007
# Revision date : 5 August 2011
# Package : BU Plugins
# Description : Nagios plugin (script) to check cpu utilization
# statistics.
# This script has been designed and written on Unix
# plateform (Linux, Aix, Solaris),
# requiring iostat as external program. The locations of
# these can easily be changed by editing the variables
# $IOSTAT at the top of the script.
# The script is used to query 6 of the key cpu statistics
# (user,system,iowait,steal,nice,idle) at the same time.
#
# USAGE : ./check_cpu_stats.sh [-w <user,system,iowait>] [-c <user,system,iowait>] ( [ -i <intervals in second> ] [ -n <report number> ])
#
# Exemple: ./check_cpu_stats.sh
# ./check_cpu_stats.sh -w 70,40,30 -c 90,60,40
# ./check_cpu_stats.sh -w 70,40,30 -c 90,60,40 -i 3 -n 5
#
# ----------------------------------------------------------------------------------------
#
# TODO: - Support for MacOSX
# - Search Binary Path (iostat,sar) or Add Path parameter when other as default
#
# ========================================================================================
#
# HISTORY :
# Release | Date | Authors | Description
# -------------+------------+------------------+------------------------------------------------------------------------------------
# 2.0 | 16.02.08 | Steve Bosek | Solaris support and new parameters
# New Parameters : - iostat seconds intervals
# - iostat report number
# 2.1 | 08.06.08 | Steve Bosek | Bug perfdata and convert comma in point for Linux result
# 2.1.1 | 05.12.08 | Steve Bosek | Fixed improperly terminated string that was left open at line 130
# 2.1.2 | 06.12.08 | Bas van der Doorn | Fixed linux steal reported as idle, comparisons
# 2.2 | 06.12.08 | Bas van der Doorn | Capable systems will output nice and steal data
# 2.2.1 | 06.12.08 | Steve Bosek | Add for uniform Unix output nice and steal data on all perfdata
# 2.3 | 11.12.08 | Steve Bosek | Add Threshold for user and system output with format -w user,system,iowait -c user,system,iowait
# Add Default parameters value for threshold if not define
# Add check for ${TAB_WARNING_THRESHOLD[@]} and ${TAB_CRITICAL_THRESHOLD[@]}
# Add verify for Critical CPU Threshold lower as Warning CPU threshold
# 2.3.1 | 16.12.08 | Steve Bosek | Potability AIX,SOLARIS,LINUX for table initialisation (TAB_WARNING_THRESHOLD and TAB_CRITICAL_THRESHOLD)
# 2.3.2 | 22.12.08 | Steve Bosek | Strict Guideline Nagios for perfdata
# 2.3.3 | 08.02.08 | Philipp Lemke | Add HP-UX support (tested on HP-UX B.11.23 U ia64) - steve bosek : uniform perfdata
# 2.3.4 | 29.03.09 | Steve Bosek | Bug in line 176: return only critical state for warning condition for USER Stats.
# 2.3.5 | 05.05.09 | Steve Bosek | Bug fix in NAGIOS_DATA for HP-UX
# 2.3.6 | 05.08.11 | Steve Bosek | Bug fix in NAGIOS_DATA : replace comma with semicolon in perfdata - compatibility with pnp
# -----------------------------------------------------------------------------------------
# Paths to commands used in this script. These may have to be modified to match your system setup.
IOSTAT="/usr/bin/iostat"
#Needed for HP-UX
SAR="/usr/bin/sar"
# Nagios return codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
# Plugin parameters value if not define
LIST_WARNING_THRESHOLD=${LIST_WARNING_THRESHOLD:="70,40,30"}
LIST_CRITICAL_THRESHOLD=${LIST_CRITICAL_THRESHOLD:="90,60,40"}
INTERVAL_SEC=${INTERVAL_SEC:="1"}
NUM_REPORT=${NUM_REPORT:="3"}
# Plugin variable description
PROGNAME=$(basename $0)
RELEASE="Revision 2.3.6"
AUTHOR="(c) 2008 Steve Bosek (steve.bosek@gmail.com)"
if [ `uname` = "HP-UX" ];then
if [ ! -x $SAR ]; then
echo "UNKNOWN: sar not found or is not executable by the nagios user."
exit $STATE_UNKNOWN
fi
else
if [ ! -x $IOSTAT ]; then
echo "UNKNOWN: iostat not found or is not executable by the nagios user."
exit $STATE_UNKNOWN
fi
fi
# Functions plugin usage
print_release() {
echo "$RELEASE $AUTHOR"
}
print_usage() {
echo ""
echo "$PROGNAME $RELEASE - CPU Utilization check script for Nagios"
echo ""
echo "Usage: check_cpu_stats.sh -w -c (-i -n)"
echo ""
echo " -w Warning threshold in % for warn_user,warn_system,warn_iowait CPU (default : 70,40,30)"
echo " Exit with WARNING status if cpu exceeds warn_n"
echo " -c Critical threshold in % for crit_user,crit_system,crit_iowait CPU (default : 90,60,40)"
echo " Exit with CRITICAL status if cpu exceeds crit_n"
echo " -i Interval in seconds for iostat (default : 1)"
echo " -n Number report for iostat (default : 3)"
echo " -h Show this page"
echo ""
echo "Usage: $PROGNAME"
echo "Usage: $PROGNAME --help"
echo ""
exit 0
}
print_help() {
print_usage
echo ""
echo "This plugin will check cpu utilization (user,system,CPU_Iowait,idle in %)"
echo ""
exit 0
}
# Parse parameters
while [ $# -gt 0 ]; do
case "$1" in
-h | --help)
print_help
exit $STATE_OK
;;
-v | --version)
print_release
exit $STATE_OK
;;
-w | --warning)
shift
LIST_WARNING_THRESHOLD=$1
;;
-c | --critical)
shift
LIST_CRITICAL_THRESHOLD=$1
;;
-i | --interval)
shift
INTERVAL_SEC=$1
;;
-n | --number)
shift
NUM_REPORT=$1
;;
*) echo "Unknown argument: $1"
print_usage
exit $STATE_UNKNOWN
;;
esac
shift
done
# List to Table for warning threshold (compatibility with
TAB_WARNING_THRESHOLD=( `echo $LIST_WARNING_THRESHOLD | sed 's/,/ /g'` )
if [ "${#TAB_WARNING_THRESHOLD[@]}" -ne "3" ]; then
echo "ERROR : Bad count parameter in Warning Threshold"
exit $STATE_WARNING
else
USER_WARNING_THRESHOLD=`echo ${TAB_WARNING_THRESHOLD[0]}`
SYSTEM_WARNING_THRESHOLD=`echo ${TAB_WARNING_THRESHOLD[1]}`
IOWAIT_WARNING_THRESHOLD=`echo ${TAB_WARNING_THRESHOLD[2]}`
fi
# List to Table for critical threshold
TAB_CRITICAL_THRESHOLD=( `echo $LIST_CRITICAL_THRESHOLD | sed 's/,/ /g'` )
if [ "${#TAB_CRITICAL_THRESHOLD[@]}" -ne "3" ]; then
echo "ERROR : Bad count parameter in CRITICAL Threshold"
exit $STATE_WARNING
else
USER_CRITICAL_THRESHOLD=`echo ${TAB_CRITICAL_THRESHOLD[0]}`
SYSTEM_CRITICAL_THRESHOLD=`echo ${TAB_CRITICAL_THRESHOLD[1]}`
IOWAIT_CRITICAL_THRESHOLD=`echo ${TAB_CRITICAL_THRESHOLD[2]}`
fi
if [ ${TAB_WARNING_THRESHOLD[0]} -ge ${TAB_CRITICAL_THRESHOLD[0]} -o ${TAB_WARNING_THRESHOLD[1]} -ge ${TAB_CRITICAL_THRESHOLD[1]} -o ${TAB_WARNING_THRESHOLD[2]} -ge ${TAB_CRITICAL_THRESHOLD[2]} ]; then
echo "ERROR : Critical CPU Threshold lower as Warning CPU Threshold "
exit $STATE_WARNING
fi
# CPU Utilization Statistics Unix Plateform ( Linux,AIX,Solaris are supported )
case `uname` in
Linux ) CPU_REPORT=`iostat -c $INTERVAL_SEC $NUM_REPORT | sed -e 's/,/./g' | tr -s ' ' ';' | sed '/^$/d' | tail -1`
CPU_REPORT_SECTIONS=`echo ${CPU_REPORT} | grep ';' -o | wc -l`
CPU_USER=`echo $CPU_REPORT | cut -d ";" -f 2`
CPU_NICE=`echo $CPU_REPORT | cut -d ";" -f 3`
CPU_SYSTEM=`echo $CPU_REPORT | cut -d ";" -f 4`
CPU_IOWAIT=`echo $CPU_REPORT | cut -d ";" -f 5`
if [ ${CPU_REPORT_SECTIONS} -ge 6 ]; then
CPU_STEAL=`echo $CPU_REPORT | cut -d ";" -f 6`
CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 7`
NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}%, iowait=${CPU_IOWAIT}%, idle=${CPU_IDLE}%, nice=${CPU_NICE}%, steal=${CPU_STEAL}% | CpuUser=${CPU_USER}%;${TAB_WARNING_THRESHOLD[0]};${TAB_CRITICAL_THRESHOLD[0]};0; CpuSystem=${CPU_SYSTEM}%;${TAB_WARNING_THRESHOLD[1]};${TAB_CRITICAL_THRESHOLD[1]};0; CpuIowait=${CPU_IOWAIT}%;${TAB_WARNING_THRESHOLD[2]};${TAB_CRITICAL_THRESHOLD[2]};0; CpuIdle=${CPU_IDLE}%;0;0;0; CpuNice=${CPU_NICE}%;0;0;0; CpuSteal=${CPU_STEAL}%;0;0;0;"
else
CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 6`
NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}%, iowait=${CPU_IOWAIT}%, idle=${CPU_IDLE}%, nice=${CPU_NICE}%, steal=0.00% | CpuUser=${CPU_USER}%;${TAB_WARNING_THRESHOLD[0]};${TAB_CRITICAL_THRESHOLD[0]};0; CpuSystem=${CPU_SYSTEM}%;${TAB_WARNING_THRESHOLD[1]};${TAB_CRITICAL_THRESHOLD[1]};0; CpuIowait=${CPU_IOWAIT}%;${TAB_WARNING_THRESHOLD[2]};${TAB_CRITICAL_THRESHOLD[2]};0; CpuIdle=${CPU_IDLE}%;0;0;0; CpuNice=${CPU_NICE}%;0;0;0; CpuSteal=0.0%;0;0;0;"
fi
;;
AIX ) CPU_REPORT=`iostat -t $INTERVAL_SEC $NUM_REPORT | sed -e 's/,/./g'|tr -s ' ' ';' | tail -1`
CPU_USER=`echo $CPU_REPORT | cut -d ";" -f 4`
CPU_SYSTEM=`echo $CPU_REPORT | cut -d ";" -f 5`
CPU_IOWAIT=`echo $CPU_REPORT | cut -d ";" -f 7`
CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 6`
NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}%, iowait=${CPU_IOWAIT}%, idle=${CPU_IDLE}%, nice=0.00%, steal=0.00% | CpuUser=${CPU_USER}%;${TAB_WARNING_THRESHOLD[0]};${TAB_CRITICAL_THRESHOLD[0]};0; CpuSystem=${CPU_SYSTEM}%;${TAB_WARNING_THRESHOLD[1]};${TAB_CRITICAL_THRESHOLD[1]};0; CpuIowait=${CPU_IOWAIT}%;${TAB_WARNING_THRESHOLD[2]};${TAB_CRITICAL_THRESHOLD[2]};0; CpuIdle=${CPU_IDLE}%;0;0;0; CpuNice=0.0%;0;0;0; CpuSteal=0.0%;0;0;0;"
;;
SunOS ) CPU_REPORT=`iostat -c $INTERVAL_SEC $NUM_REPORT | tail -1`
CPU_USER=`echo $CPU_REPORT | awk '{ print $1 }'`
CPU_SYSTEM=`echo $CPU_REPORT | awk '{ print $2 }'`
CPU_IOWAIT=`echo $CPU_REPORT | awk '{ print $3 }'`
CPU_IDLE=`echo $CPU_REPORT | awk '{ print $4 }'`
NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}%, iowait=${CPU_IOWAIT}%, idle=${CPU_IDLE}%, nice=0.00%, steal=0.00% | CpuUser=${CPU_USER}%;${TAB_WARNING_THRESHOLD[0]};${TAB_CRITICAL_THRESHOLD[0]};0; CpuSystem=${CPU_SYSTEM}%;${TAB_WARNING_THRESHOLD[1]};${TAB_CRITICAL_THRESHOLD[1]};0; CpuIowait=${CPU_IOWAIT}%;${TAB_WARNING_THRESHOLD[2]};${TAB_CRITICAL_THRESHOLD[2]};0; CpuIdle=${CPU_IDLE}%;0;0;0; CpuNice=0.0%;0;0;0; CpuSteal=0.0%;0;0;0;"
;;
HP-UX) CPU_REPORT=`$SAR $INTERVAL_SEC $NUM_REPORT | grep Average`
CPU_USER=`echo $CPU_REPORT | awk '{ print $2 }'`
CPU_SYSTEM=`echo $CPU_REPORT | awk '{ print $3 }'`
CPU_IOWAIT=`echo $CPU_REPORT | awk '{ print $4 }'`
CPU_IDLE=`echo $CPU_REPORT | awk '{ print $5 }'`
NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% nice=0.00% steal=0.00% | CpuUser=${CPU_USER}%;${TAB_WARNING_THRESHOLD[0]};${TAB_CRITICAL_THRESHOLD[0]};0; CpuSystem=${CPU_SYSTEM}%;${TAB_WARNING_THRESHOLD[1]};${TAB_CRITICAL_THRESHOLD[1]};0; CpuIowait=${CPU_IOWAIT};${TAB_WARNING_THRESHOLD[2]};${TAB_CRITICAL_THRESHOLD[2]};0; CpuIdle=${CPU_IDLE}%;0;0;0; CpuNice=0.0%;0;0;0; CpuSteal=0.0%;0;0;0;"
;;
# MacOS X test
# Darwin ) CPU_REPORT=`iostat -w $INTERVAL_SEC -c $NUM_REPORT | tail -1`
# CPU_USER=`echo $CPU_REPORT | awk '{ print $4 }'`
# CPU_SYSTEM=`echo $CPU_REPORT | awk '{ print $5 }'`
# CPU_IDLE=`echo $CPU_REPORT | awk '{ print $6 }'`
# NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=0.00% idle=${CPU_IDLE}% nice=0.00% steal=0.00% | CpuUser=${CPU_USER}%;${TAB_WARNING_THRESHOLD[0]};${TAB_CRITICAL_THRESHOLD[0]};0; CpuSystem=${CPU_SYSTEM}%;${TAB_WARNING_THRESHOLD[1]};${TAB_CRITICAL_THRESHOLD[1]};0; CpuIowait=0.0%;0;0;0; CpuIdle=${CPU_IDLE}%;0;0;0; CpuNice=0.0%;0;0;0; CpuSteal=0.0%;0;0;0;"
# ;;
*) echo "UNKNOWN: `uname` not yet supported by this plugin. Coming soon !"
exit $STATE_UNKNOWN
;;
esac
# Add for integer shell issue
CPU_USER_MAJOR=`echo $CPU_USER| cut -d "." -f 1`
CPU_SYSTEM_MAJOR=`echo $CPU_SYSTEM | cut -d "." -f 1`
CPU_IOWAIT_MAJOR=`echo $CPU_IOWAIT | cut -d "." -f 1`
CPU_IDLE_MAJOR=`echo $CPU_IDLE | cut -d "." -f 1`
# Return
if [ ${CPU_USER_MAJOR} -ge $USER_CRITICAL_THRESHOLD ]; then
echo "CPU STATISTICS CRITICAL : ${NAGIOS_DATA}"
exit $STATE_CRITICAL
elif [ ${CPU_SYSTEM_MAJOR} -ge $SYSTEM_CRITICAL_THRESHOLD ]; then
echo "CPU STATISTICS CRITICAL : ${NAGIOS_DATA}"
exit $STATE_CRITICAL
elif [ ${CPU_IOWAIT_MAJOR} -ge $IOWAIT_CRITICAL_THRESHOLD ]; then
echo "CPU STATISTICS CRITICAL : ${NAGIOS_DATA}"
exit $STATE_CRITICAL
elif [ ${CPU_USER_MAJOR} -ge $USER_WARNING_THRESHOLD ] && [ ${CPU_USER_MAJOR} -lt $USER_CRITICAL_THRESHOLD ]; then
echo "CPU STATISTICS WARNING : ${NAGIOS_DATA}"
exit $STATE_WARNING
elif [ ${CPU_SYSTEM_MAJOR} -ge $SYSTEM_WARNING_THRESHOLD ] && [ ${CPU_SYSTEM_MAJOR} -lt $SYSTEM_CRITICAL_THRESHOLD ]; then
echo "CPU STATISTICS WARNING : ${NAGIOS_DATA}"
exit $STATE_WARNING
elif [ ${CPU_IOWAIT_MAJOR} -ge $IOWAIT_WARNING_THRESHOLD ] && [ ${CPU_IOWAIT_MAJOR} -lt $IOWAIT_CRITICAL_THRESHOLD ]; then
echo "CPU STATISTICS WARNING : ${NAGIOS_DATA}"
exit $STATE_WARNING
else
echo "CPU STATISTICS OK : ${NAGIOS_DATA}"
exit $STATE_OK
fi