185 lines
7.1 KiB
Text
185 lines
7.1 KiB
Text
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#!/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 : Steve Bosek
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# Patched by : Bas van der Doorn
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# Release : 2.2
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# Creation date : 8 September 2007
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# Revision date : 23 November 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. Note though that there is only one set of warning
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# and critical values for iowait percent.
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#
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# Usage : ./check_cpu_stats.sh [-w <warn>] [-c <crit] ( [ -i <intervals in second> ] [ -n <report number> ])
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# ----------------------------------------------------------------------------------------
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#
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# TODO: Support for HP-UX
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#
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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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# 2.0 | 16.02.08 | Steve Bosek | Solaris support and new parameters
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# | | | New Parameters : - iostat seconds intervals
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# | | | - iostat report number
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# 2.1 | 08.06.08 | Steve Bosek | Bug perfdata and convert comma in point for Linux result
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# 2.1.1 | 20.11.08 | Bas van der Doorn | Fixed improperly terminated string
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# 2.1.2 | 23.11.08 | Bas van der Doorn | Fixed linux steal reported as idle, comparisons
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# 2.2 | 23.11.08 | Bas van der Doorn | Capable systems will output nice and steal data
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# -----------------------------------------------------------------------------------------
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#
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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:="30"}
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CRITICAL_THRESHOLD=${CRITICAL_THRESHOLD:="100"}
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INTERVAL_SEC=${INTERVAL_SEC:="1"}
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NUM_REPORT=${NUM_REPORT:="3"}
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# Plugin variable description
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PROGNAME=$(basename $0)
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RELEASE="Revision 2.1.1"
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AUTHOR="(c) 2008 Steve Bosek (steve.bosek@gmail.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_stats.sh -w -c (-i -n)"
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echo ""
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echo " -w Warning level in % for cpu iowait"
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echo " -c Crical level in % for cpu iowait"
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echo " -i Interval in seconds for iostat (default : 1)"
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echo " -n 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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;;
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-c | --critical)
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shift
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CRITICAL_THRESHOLD=$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 $NUM_REPORT | sed -e 's/,/./g' | tr -s ' ' ';' | sed '/^$/d' | tail -1`
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CPU_REPORT_SECTIONS=`echo ${CPU_REPORT} | grep ';' -o | wc -l`
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CPU_USER=`echo $CPU_REPORT | cut -d ";" -f 2`
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CPU_NICE=`echo $CPU_REPORT | cut -d ";" -f 3`
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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_IOWAIT_MAJOR=`echo $CPU_IOWAIT | cut -d "." -f 1`
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if [ ${CPU_REPORT_SECTIONS} -ge 6 ]; then
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CPU_STEAL=`echo $CPU_REPORT | cut -d ";" -f 6`
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CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 7`
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NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% nice=${CPU_NICE}% steal=${CPU_STEAL}% | CpuUser=${CPU_USER};CpuSystem=${CPU_SYSTEM};CpuIoWait=${CPU_IOWAIT};CpuIdle=${CPU_IDLE};CpuNice=${CPU_NICE};CpuSteal=${CPU_STEAL};$WARNING_THRESHOLD;$CRITICAL_THRESHOLD"
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else
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CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 6`
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NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% nice=${CPU_NICE}% | CpuUser=${CPU_USER};CpuSystem=${CPU_SYSTEM};CpuIoWait=${CPU_IOWAIT};CpuIdle=${CPU_IDLE};CpuNice=${CPU_NICE};$WARNING_THRESHOLD;$CRITICAL_THRESHOLD"
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fi
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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_IOWAIT_MAJOR=`echo $CPU_IOWAIT | cut -d "." -f 1`
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CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 6`
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NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% | CpuUser=${CPU_USER};CpuSystem=${CPU_SYSTEM};CpuIoWait=${CPU_IOWAIT};CpuIdle=${CPU_IDLE};$WARNING_THRESHOLD;$CRITICAL_THRESHOLD"
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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_IOWAIT_MAJOR=`echo $CPU_IOWAIT | cut -d "." -f 1`
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CPU_IDLE=`echo $CPU_REPORT | awk '{ print $4 }'`
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NAGIOS_DATA="user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% | CpuUser=${CPU_USER};CpuSystem=${CPU_SYSTEM};CpuIoWait=${CPU_IOWAIT};CpuIdle=${CPU_IDLE};$WARNING_THRESHOLD;$CRITICAL_THRESHOLD"
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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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if [ ${CPU_IOWAIT_MAJOR} -ge $WARNING_THRESHOLD ] && [ ${CPU_IOWAIT_MAJOR} -lt $CRITICAL_THRESHOLD ]; then
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echo "CPU STATISTICS WARNING : ${NAGIOS_DATA}"
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exit $STATE_WARNING
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elif [ ${CPU_IOWAIT_MAJOR} -ge $CRITICAL_THRESHOLD ]; then
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echo "CPU STATISTICS CRITICAL : ${NAGIOS_DATA}"
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exit $STATE_CRITICAL
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else
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echo "CPU STATISTICS OK : ${NAGIOS_DATA}"
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exit $STATE_OK
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fi
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