#!/bin/sh ############################################### # # Nagios script to check I/O statistics # # NOTE: Requires kernel 2.4 or higher # # See usage for command line switches # # Created: 2007-06-27 (i.yates@uea.ac.uk) # Updated: 2007-07-27 (i.yates@uea.ac.uk) # Updated: 2007-10-29 (i.yates@uea.ac.uk) - Fixed typos in usage! # Updated: 2008-03-26 (i.yates@uea.ac.uk) - Fixed bug in critical/warning level checking which could result in erroneous results. Thanks to Drew Sudell for pointing this out! # Updated: 2008-11-21 (kseever@in-kc.com) - Rewrote entire script to meet our needs # ############################################### . /usr/lib/nagios/plugins/utils.sh VERSION="1.2" IOSTAT=/usr/bin/iostat GREP=/bin/grep AWK=/usr/bin/awk TPS_LEVEL_WARN="" TPS_LEVEL_CRIT="" READS_LEVEL_WARN="" READS_LEVEL_CRIT="" WRITES_LEVEL_CRIT="" WRITES_LEVEL_CRIT="" RESULT="" RESULT_STATUS="" RESULT_TPS="" RESULT_READS="" RESULT_WRITES="" PERF="" PERF_TPS="" PERF_READS="" PERF_WRITES="" EXIT_STATUS=$STATE_OK EXIT_STATUS_TPS=$STATE_OK EXIT_STATUS_READS=$STATE_OK EXIT_STATUS_WRITES=$STATE_OK READSS_HISTORY=0 WRITESS_HISTORY=0 ############################################### # ## FUNCTIONS # ## Print usage usage() { echo " check_iostat $VERSION - Nagios I/O statistics check script" echo "" echo " Usage: check_iostat -w -c -d ] [ -h ]" echo "" echo " -w Warning trigger levels READS/WRITES" echo " -c Critical trigger levels READS/WRITES" echo " -d Device" echo " -h Show this page" echo "" } ## Process command line options doopts() { if ( `test 0 -lt $#` ) then while getopts ":w:c:d:h:" myarg "$@" do case $myarg in h|\?) usage exit;; w) LEVEL_WARN="$OPTARG";; c) LEVEL_CRIT="$OPTARG";; d) DEVICE="$OPTARG";; *) # Default usage exit;; esac done shift `expr $OPTIND - 1` else usage exit fi } # Write output and return result theend() { echo "$RESULT_STATUS: $RESULT |$PERF" exit $EXIT_STATUS } # ## END FUNCTIONS # ############################################# # ## MAIN # # Handle command line options doopts $@ # Do the do FIRST_RUN=$(if test -f "/tmp/$DEVICE.readsio" && test -f "/tmp/$DEVICE.readsio"; then echo "false"; else echo "true"; fi) OUTPUT=`$IOSTAT -k -d $DEVICE | $GREP $DEVICE` TIMESTAMP=`date +%s` if test -z "$OUTPUT" ; then RESULT="IOSTAT UNKNOWN - query returned no output!" EXIT_STATUS=$STATE_UNKNOWN else ## Handle Transactions per second # TPS=`echo $OUTPUT | $AWK '{print $2}'` # TPS_ABS=`echo $TPS | $AWK '{printf "%d",$1}'` # TPS_LEVEL_WARN=`echo $LEVEL_WARN | $AWK -F/ '{print $1}'` # TPS_LEVEL_CRIT=`echo $LEVEL_CRIT | $AWK -F/ '{print $1}'` # RESULT_TPS="Transactions = $TPS" # PERF_TPS="TPS=$TPS;$TPS_LEVEL_WARN;$TPS_LEVEL_CRIT" # if test "$TPS_ABS" -lt "$TPS_LEVEL_WARN" ; then # EXIT_STATUS_TPS=$STATE_OK # else # if test "$TPS_ABS" -ge "$TPS_LEVEL_CRIT" ; then # EXIT_STATUS_TPS=$STATE_CRITICAL # else # if test "$TPS_ABS" -ge "$TPS_LEVEL_WARN" ; then # EXIT_STATUS_TPS=$STATE_WARNING # fi # fi # fi # READSS_CURRENT=`echo $OUTPUT | $AWK '{print $6}'` WRITESS_CURRENT=`echo $OUTPUT | $AWK '{print $7}'` if [ $FIRST_RUN = "false" ]; then ## Handle Reads per second READSS_HISTORY=`cat /tmp/$DEVICE.readsio | $AWK -F"::" '{print $1}'` READSS_TIMESTAMP=`cat /tmp/$DEVICE.readsio | $AWK -F"::" '{print $2}'` if test "$READSS_CURRENT" -ge "$READSS_HISTORY" ; then TIMEVARIANCE=`expr $TIMESTAMP - $READSS_TIMESTAMP` READSSVARIANCE=`expr $READSS_CURRENT - $READSS_HISTORY` fi READSS=`expr $READSSVARIANCE / $TIMEVARIANCE` READSS_ABS=`echo $READSS | $AWK '{printf "%d",$1}'` READS_LEVEL_WARN=`echo $LEVEL_WARN | $AWK -F/ '{print $1}'` READS_LEVEL_CRIT=`echo $LEVEL_CRIT | $AWK -F/ '{print $1}'` RESULT_READS="Reads = $READSS" PERF_READS="READS=$READSS;$READS_LEVEL_WARN;$READS_LEVEL_CRIT" if test "$READSS_ABS" -lt "$READS_LEVEL_WARN" ; then EXIT_STATUS_READS=$STATE_OK else if test "$READSS_ABS" -ge "$READS_LEVEL_CRIT" ; then EXIT_STATUS_READS=$STATE_CRITICAL else if test "$READSS_ABS" -ge "$READS_LEVEL_WARN" ; then EXIT_STATUS_READS=$STATE_WARNING fi fi fi ## Handle Writes per second WRITESS_HISTORY=`cat /tmp/$DEVICE.writesio | $AWK -F"::" '{print $1}'` WRITESS_TIMESTAMP=`cat /tmp/$DEVICE.writesio | $AWK -F"::" '{print $2}'` if test "$WRITESS_CURRENT" -ge "$WRITESS_HISTORY" ; then TIMEVARIANCE=`expr $TIMESTAMP - $WRITESS_TIMESTAMP` WRITESSVARIANCE=`expr $WRITESS_CURRENT - $WRITESS_HISTORY` fi WRITESS=`expr $WRITESSVARIANCE / $TIMEVARIANCE` WRITESS_ABS=`echo $WRITESS | $AWK '{printf "%d",$1}'` WRITES_LEVEL_WARN=`echo $LEVEL_WARN | $AWK -F/ '{print $2}'` WRITES_LEVEL_CRIT=`echo $LEVEL_CRIT | $AWK -F/ '{print $2}'` RESULT_WRITES="Writes = $WRITESS" PERF_WRITES="WRITES=$WRITESS;$WRITES_LEVEL_WARN;$WRITES_LEVEL_CRIT" if test "$WRITESS_ABS" -lt "$WRITES_LEVEL_WARN" ; then EXIT_STATUS_WRITES=$STATE_OK else if test "$WRITESS_ABS" -ge "$WRITES_LEVEL_CRIT" ; then EXIT_STATUS_WRITES=$STATE_CRITICAL else if test "$WRITESS_ABS" -ge "$WRITES_LEVEL_WARN" ; then EXIT_STATUS_WRITES=$STATE_WARNING fi fi fi fi echo "$READSS_CURRENT::$TIMESTAMP" > "/tmp/$DEVICE.readsio" echo "$WRITESS_CURRENT::$TIMESTAMP" > "/tmp/$DEVICE.writesio" # RESULT="$RESULT_TPS ; $RESULT_READS ; $RESULT_WRITES" # PERF="$PERF_TPS $PERF_READS $PERF_WRITES" if [ $FIRST_RUN = "false" ]; then RESULT="$RESULT_READS ; $RESULT_WRITES" PERF="$PERF_READS $PERF_WRITES" # if test $EXIT_STATUS_TPS -eq $STATE_CRITICAL ; then # EXIT_STATUS=$STATE_CRITICAL # RESULT_STATUS="CRITICAL" # else if test $EXIT_STATUS_READS -eq $STATE_CRITICAL ; then EXIT_STATUS=$STATE_CRITICAL RESULT_STATUS="CRITICAL" else if test $EXIT_STATUS_WRITES -eq $STATE_CRITICAL ; then EXIT_STATUS=$STATE_CRITICAL RESULT_STATUS="CRITICAL" else # if test $EXIT_STATUS_TPS -eq $STATE_WARNING ; then # EXIT_STATUS=$STATE_WARNING # RESULT_STATUS="WARNING" # else if test $EXIT_STATUS_READS -eq $STATE_WARNING ; then EXIT_STATUS=$STATE_WARNING RESULT_STATUS="WARNING" else if test $EXIT_STATUS_WRITES -eq $STATE_WARNING ; then EXIT_STATUS=$STATE_WARNING RESULT_STATUS="WARNING" else EXIT_STATUS=$STATE_OK RESULT_STATUS="OK" fi fi # fi fi # fi fi else RESULT_STATUS="CRITICAL" RESULT="Tracker file IO error. Verify /tmp/$DEVICE.* files." fi fi # Quit and return information and exit status theend