220 lines
8 KiB
Bash
Executable file
220 lines
8 KiB
Bash
Executable file
#!/bin/bash
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# ========================================================================================
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# CPU Utilization Statistics plugin for Nagios
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#
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# Written by : Andreas Baess based on a script by Steve Bosek
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# Release : 1.1
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# Creation date : 3 May 2008
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# Package : DTB Nagios Plugin
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# Description : Nagios plugin (script) to check cpu utilization statistics.
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# This script has been designed and written on Unix plateform (Linux, Aix, Solaris),
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# requiring iostat as external program. The locations of these can easily
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# be changed by editing the variables $IOSTAT at the top of the script.
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# The script is used to query 4 of the key cpu statistics (user,system,iowait,idle)
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# at the same time.
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#
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# Usage : ./check_cpu.sh [-w <warn>] [-c <crit]
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# [-uw <user_cpu warn>] [-uc <user_cpu crit>]
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# [-sw <sys_cpu warn>] [-sc <sys_cpu crit>]
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# [-iw <io_wait_cpu warn>] [-ic <io_wait_cpu crit>]
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# [-i <intervals in second>] [-n <report number>]
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# ----------------------------------------------------------------------------------------
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# ========================================================================================
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#
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# HISTORY :
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# Release | Date | Authors | Description
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# --------------+---------------+---------------+------------------------------------------
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# 1.1 | 03.05.08 | Andreas Baess | Changed script to use vmstat on Linux because
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# | | | iostat does not use integers
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# | | | Fixed output to display the IO-wait warning threshhold
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# --------------+---------------+---------------+------------------------------------------
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# 1.0 | 03.05.08 | Andreas Baess | Changed script so that thresholds are global
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# | | | and output can be parsed by perfprocessing
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# | | | changed default warning to 70 critical to 90
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# =========================================================================================
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# Paths to commands used in this script. These may have to be modified to match your system setup.
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IOSTAT=/usr/bin/iostat
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# Nagios return codes
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STATE_OK=0
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STATE_WARNING=1
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STATE_CRITICAL=2
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STATE_UNKNOWN=3
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# Plugin parameters value if not define
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WARNING_THRESHOLD=${WARNING_THRESHOLD:="70"}
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CRITICAL_THRESHOLD=${CRITICAL_THRESHOLD:="90"}
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INTERVAL_SEC=${INTERVAL_SEC:="1"}
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NUM_REPORT=${NUM_REPORT:="3"}
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U_CPU_W=${WARNING_THRESHOLD}
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S_CPU_W=${WARNING_THRESHOLD}
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IO_CPU_W=${WARNING_THRESHOLD}
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U_CPU_C=${CRITICAL_THRESHOLD}
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S_CPU_C=${CRITICAL_THRESHOLD}
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IO_CPU_C=${CRITICAL_THRESHOLD}
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# Plugin variable description
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PROGNAME=$(basename $0)
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RELEASE="Revision 1.0"
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AUTHOR="by Andreas Baess <ab@gun.de> based on a work from Steve Bosek (sbosek@mac.com)"
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if [ ! -x $IOSTAT ]; then
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echo "UNKNOWN: iostat not found or is not executable by the nagios user."
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exit $STATE_UNKNOWN
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fi
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# Functions plugin usage
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print_release() {
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echo "$RELEASE $AUTHOR"
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}
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print_usage() {
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echo ""
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echo "$PROGNAME $RELEASE - CPU Utilization check script for Nagios"
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echo ""
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echo "Usage: check_cpu.sh [flags]"
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echo ""
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echo "Flags:"
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echo " -w <number> : Global Warning level in % for user/system/io-wait cpu"
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echo " -uw <number> : Warning level in % for user cpu"
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echo " -iw <number> : Warning level in % for IO_wait cpu"
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echo " -sw <number> : Warning level in % for system cpu"
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echo " -c <number> : Global Critical level in % for user/system/io-wait cpu"
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echo " -uc <number> : Critical level in % for user cpu"
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echo " -ic <number> : Critical level in % for IO_wait cpu"
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echo " -sc <number> : Critical level in % for system cpu"
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echo " -i <number> : Interval in seconds for iostat (default : 1)"
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echo " -n <number> : Number report for iostat (default : 3)"
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echo " -h Show this page"
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echo ""
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echo "Usage: $PROGNAME"
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echo "Usage: $PROGNAME --help"
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echo ""
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}
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print_help() {
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print_usage
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echo ""
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echo "This plugin will check cpu utilization (user,system,iowait,idle in %)"
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echo ""
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exit 0
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}
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# Parse parameters
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while [ $# -gt 0 ]; do
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case "$1" in
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-h | --help)
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print_help
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exit $STATE_OK
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;;
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-v | --version)
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print_release
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exit $STATE_OK
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;;
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-w | --warning)
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shift
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WARNING_THRESHOLD=$1
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U_CPU_W=$1
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S_CPU_W=$1
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IO_CPU_W=$1
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;;
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-c | --critical)
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shift
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CRITICAL_THRESHOLD=$1
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U_CPU_C=$1
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S_CPU_C=$1
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IO_CPU_C=$1
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;;
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-uw | --uwarn)
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shift
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U_CPU_W=$1
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;;
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-uc | --ucrit)
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shift
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U_CPU_C=$1
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;;
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-sw | --swarn)
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shift
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S_CPU_W=$1
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;;
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-sc | --scrit)
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shift
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S_CPU_C=$1
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;;
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-iw | --iowarn)
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shift
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IO_CPU_W=$1
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;;
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-ic | --iocrit)
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shift
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IO_CPU_C=$1
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;;
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-i | --interval)
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shift
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INTERVAL_SEC=$1
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;;
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-n | --number)
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shift
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NUM_REPORT=$1
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;;
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*) echo "Unknown argument: $1"
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print_usage
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exit $STATE_UNKNOWN
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;;
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esac
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shift
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done
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# CPU Utilization Statistics Unix Plateform ( Linux,AIX,Solaris are supported )
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case `uname` in
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# Linux ) CPU_REPORT=`iostat -c $INTERVAL_SEC $NUM_REPORT | tr -s ' ' ';' | sed '/^$/d' | tail -1`
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# CPU_USER=`echo $CPU_REPORT | cut -d ";" -f 2`
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# CPU_SYSTEM=`echo $CPU_REPORT | cut -d ";" -f 4`
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# CPU_IOWAIT=`echo $CPU_REPORT | cut -d ";" -f 5`
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# CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 6`
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# ;;
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AIX ) CPU_REPORT=`iostat -t $INTERVAL_SEC $NUM_REPORT | sed -e 's/,/./g'|tr -s ' ' ';' | tail -1`
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CPU_USER=`echo $CPU_REPORT | cut -d ";" -f 4`
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CPU_SYSTEM=`echo $CPU_REPORT | cut -d ";" -f 5`
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CPU_IOWAIT=`echo $CPU_REPORT | cut -d ";" -f 7`
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CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 6`
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;;
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Linux ) CPU_REPORT=`vmstat -n $INTERVAL_SEC $NUM_REPORT | tail -1`
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CPU_USER=`echo $CPU_REPORT | awk '{ print $13 }'`
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CPU_SYSTEM=`echo $CPU_REPORT | awk '{ print $14 }'`
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CPU_IOWAIT=`echo $CPU_REPORT | awk '{ print $16 }'`
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CPU_IDLE=`echo $CPU_REPORT | awk '{ print $15 }'`
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;;
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SunOS ) CPU_REPORT=`iostat -c $INTERVAL_SEC $NUM_REPORT | tail -1`
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CPU_USER=`echo $CPU_REPORT | awk '{ print $1 }'`
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CPU_SYSTEM=`echo $CPU_REPORT | awk '{ print $2 }'`
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CPU_IOWAIT=`echo $CPU_REPORT | awk '{ print $3 }'`
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CPU_IDLE=`echo $CPU_REPORT | awk '{ print $4 }'`
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;;
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*) echo "UNKNOWN: `uname` not yet supported by this plugin. Coming soon !"
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exit $STATE_UNKNOWN
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;;
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esac
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# Return
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# Are we in a critical state?
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if [ ${CPU_IOWAIT} -ge ${IO_CPU_C} -o ${CPU_USER} -ge ${U_CPU_C} -o ${CPU_SYSTEM} -ge ${S_CPU_C} ];
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then
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echo "CPU CRITICAL : user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% | cpu_user=${CPU_USER}%;${U_CPU_W};${U_CPU_C}; cpu_sys=${CPU_SYSTEM}%;${S_CPU_W};${S_CPU_C}; cpu_iowait=${CPU_IOWAIT}%;${IO_CPU_W};${IO_CPU_C}; cpu_idle=${CPU_IDLE}%;"
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exit $STATE_CRITICAL
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fi
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# Are we in a warning state?
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if [ ${CPU_IOWAIT} -ge ${IO_CPU_W} -o ${CPU_USER} -ge ${U_CPU_W} -o ${CPU_SYSTEM} -ge ${S_CPU_W} ];
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then
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echo "CPU WARNING : user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% | cpu_user=${CPU_USER}%;${U_CPU_W};${U_CPU_C}; cpu_sys=${CPU_SYSTEM}%;${S_CPU_W};${S_CPU_C}; cpu_iowait=${CPU_IOWAIT}%;${IO_CPU_W};${IO_CPU_C}; cpu_idle=${CPU_IDLE}%;"
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exit $STATE_WARNING
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fi
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# If we got this far, everything seems to be OK - IDLE has no threshold
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echo "CPU OK : user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% | cpu_user=${CPU_USER}%;${U_CPU_W};${U_CPU_C}; cpu_sys=${CPU_SYSTEM}%;${S_CPU_W};${S_CPU_C}; cpu_iowait=${CPU_IOWAIT}%;${IO_CPU_W};${IO_CPU_C}; cpu_idle=${CPU_IDLE}%;"
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exit $STATE_OK
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