Add check_cpu_stats plugin
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check_cpu_stats
Executable file
192
check_cpu_stats
Executable file
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#!/bin/bash
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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PROGNAME=`basename $0`
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VERSION="Version 1.0,"
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AUTHOR="2009, Mike Adolphs (http://www.matejunkie.com/)"
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ST_OK=0
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ST_WR=1
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ST_CR=2
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ST_UK=3
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interval=1
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print_version() {
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echo "$VERSION $AUTHOR"
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}
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print_help() {
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print_version $PROGNAME $VERSION
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echo ""
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echo "$PROGNAME is a Nagios plugin to monitor CPU utilization. It makes"
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echo "use of /proc/stat and calculates it through Jiffies rather than"
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echo "using another frontend tool like iostat or top."
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echo "When using optional warning/critical thresholds all values except"
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echo "idle are aggregated and compared to the thresholds. There's"
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echo "currently no support for warning/critical thresholds for specific"
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echo "usage parameters."
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echo ""
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echo "$PROGNAME [-i/--interval] [-w/--warning] [-c/--critical]"
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echo ""
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echo "Options:"
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echo " --interval|-i)"
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echo " Defines the pause between the two times /proc/stat is being"
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echo " parsed. Higher values could lead to more accurate result."
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echo " Default is: 1 second"
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echo " --warning|-w)"
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echo " Sets a warning level for CPU user. Default is: off"
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echo " --critical|-c)"
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echo " Sets a critical level for CPU user. Default is: off"
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exit $ST_UK
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}
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while test -n "$1"; do
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case "$1" in
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--help|-h)
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print_help
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exit $ST_UK
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;;
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--version|-v)
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print_version $PROGNAME $VERSION
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exit $ST_UK
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;;
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--interval|-i)
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interval=$2
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shift
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;;
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--warning|-w)
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warn=$2
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shift
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;;
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--critical|-c)
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crit=$2
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shift
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;;
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*)
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echo "Unknown argument: $1"
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print_help
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exit $ST_UK
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;;
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esac
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shift
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done
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val_wcdiff() {
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if [ ${warn} -gt ${crit} ]
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then
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wcdiff=1
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fi
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}
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get_cpuvals() {
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tmp1_cpu_user=`grep -m1 '^cpu' /proc/stat|awk '{print $2}'`
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tmp1_cpu_nice=`grep -m1 '^cpu' /proc/stat|awk '{print $3}'`
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tmp1_cpu_sys=`grep -m1 '^cpu' /proc/stat|awk '{print $4}'`
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tmp1_cpu_idle=`grep -m1 '^cpu' /proc/stat|awk '{print $5}'`
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tmp1_cpu_iowait=`grep -m1 '^cpu' /proc/stat|awk '{print $6}'`
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tmp1_cpu_irq=`grep -m1 '^cpu' /proc/stat|awk '{print $7}'`
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tmp1_cpu_softirq=`grep -m1 '^cpu' /proc/stat|awk '{print $8}'`
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tmp1_cpu_total=`expr $tmp1_cpu_user + $tmp1_cpu_nice + $tmp1_cpu_sys + \
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$tmp1_cpu_idle + $tmp1_cpu_iowait + $tmp1_cpu_irq + $tmp1_cpu_softirq`
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sleep $interval
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tmp2_cpu_user=`grep -m1 '^cpu' /proc/stat|awk '{print $2}'`
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tmp2_cpu_nice=`grep -m1 '^cpu' /proc/stat|awk '{print $3}'`
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tmp2_cpu_sys=`grep -m1 '^cpu' /proc/stat|awk '{print $4}'`
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tmp2_cpu_idle=`grep -m1 '^cpu' /proc/stat|awk '{print $5}'`
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tmp2_cpu_iowait=`grep -m1 '^cpu' /proc/stat|awk '{print $6}'`
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tmp2_cpu_irq=`grep -m1 '^cpu' /proc/stat|awk '{print $7}'`
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tmp2_cpu_softirq=`grep -m1 '^cpu' /proc/stat|awk '{print $8}'`
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tmp2_cpu_total=`expr $tmp2_cpu_user + $tmp2_cpu_nice + $tmp2_cpu_sys + \
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$tmp2_cpu_idle + $tmp2_cpu_iowait + $tmp2_cpu_irq + $tmp2_cpu_softirq`
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diff_cpu_user=`echo "${tmp2_cpu_user} - ${tmp1_cpu_user}" | bc -l`
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diff_cpu_nice=`echo "${tmp2_cpu_nice} - ${tmp1_cpu_nice}" | bc -l`
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diff_cpu_sys=`echo "${tmp2_cpu_sys} - ${tmp1_cpu_sys}" | bc -l`
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diff_cpu_idle=`echo "${tmp2_cpu_idle} - ${tmp1_cpu_idle}" | bc -l`
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diff_cpu_iowait=`echo "${tmp2_cpu_iowait} - ${tmp1_cpu_iowait}" | bc -l`
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diff_cpu_irq=`echo "${tmp2_cpu_irq} - ${tmp1_cpu_irq}" | bc -l`
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diff_cpu_softirq=`echo "${tmp2_cpu_softirq} - ${tmp1_cpu_softirq}" \
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| bc -l`
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diff_cpu_total=`echo "${tmp2_cpu_total} - ${tmp1_cpu_total}" | bc -l`
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cpu_user=`echo "scale=2; (1000*${diff_cpu_user}/${diff_cpu_total}+5)/10" \
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| bc -l | sed 's/^\./0./'`
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cpu_nice=`echo "scale=2; (1000*${diff_cpu_nice}/${diff_cpu_total}+5)/10" \
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| bc -l | sed 's/^\./0./'`
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cpu_sys=`echo "scale=2; (1000*${diff_cpu_sys}/${diff_cpu_total}+5)/10" \
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| bc -l | sed 's/^\./0./'`
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cpu_idle=`echo "scale=2; (1000*${diff_cpu_idle}/${diff_cpu_total}+5)/10" \
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| bc -l | sed 's/^\./0./'`
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cpu_iowait=`echo "scale=2; (1000*${diff_cpu_iowait}/${diff_cpu_total}+5)\\
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/10" | bc -l | sed 's/^\./0./'`
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cpu_irq=`echo "scale=2; (1000*${diff_cpu_irq}/${diff_cpu_total}+5)/10" \
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| bc -l | sed 's/^\./0./'`
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cpu_softirq=`echo "scale=2; (1000*${diff_cpu_softirq}/${diff_cpu_total}\\
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+5)/10" | bc -l | sed 's/^\./0./'`
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cpu_total=`echo "scale=2; (1000*${diff_cpu_total}/${diff_cpu_total}+5)\\
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/10" | bc -l | sed 's/^\./0./'`
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cpu_usage=`echo "(${cpu_user}+${cpu_nice}+${cpu_sys}+${cpu_iowait}+\\
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${cpu_irq}+${cpu_softirq})/1" | bc`
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}
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do_output() {
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output="user: ${cpu_user}, nice: ${cpu_nice}, sys: ${cpu_sys}, \
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iowait: ${cpu_iowait}, irq: ${cpu_irq}, softirq: ${cpu_softirq} \
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idle: ${cpu_idle}"
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}
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do_perfdata() {
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perfdata="'user'=${cpu_user} 'nice'=${cpu_nice} 'sys'=${cpu_sys} \
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'softirq'=${cpu_softirq} 'iowait'=${cpu_iowait} 'irq'=${cpu_irq} \
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'idle'=${cpu_idle}"
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}
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if [ -n "$warn" -a -n "$crit" ]
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then
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val_wcdiff
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if [ "$wcdiff" = 1 ]
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then
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echo "Please adjust your warning/critical thresholds. The warning\\
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must be lower than the critical level!"
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exit $ST_UK
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fi
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fi
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get_cpuvals
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do_output
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do_perfdata
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if [ -n "$warn" -a -n "$crit" ]
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then
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if [ "$cpu_usage" -ge "$warn" -a "$cpu_usage" -lt "$crit" ]
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then
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echo "WARNING - ${output} | ${perfdata}"
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exit $ST_WR
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elif [ "$cpu_usage" -ge "$crit" ]
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then
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echo "CRITICAL - ${output} | ${perfdata}"
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exit $ST_CR
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else
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echo "OK - ${output} | ${perfdata}"
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exit $ST_OK
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fi
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else
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echo "OK - ${output} | ${perfdata}"
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exit $ST_OK
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fi
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