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64 lines
2.4 KiB
Bash
64 lines
2.4 KiB
Bash
#!/bin/sh
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if [ "$1" = "-w" ] && [ "$2" -gt "0" ] && [ "$3" = "-c" ] && [ "$4" -gt "0" ] ; then
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warn=$2
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crit=$4
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SYSCTL_FILE='/home/nagios/sysctl.temp'
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SYSCTL=$(/sbin/sysctl -a > $SYSCTL_FILE)||exit 3
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#echo $SYSCTL
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TOTAL_MEM=`grep 'hw.physmem:' $SYSCTL_FILE | cut -d":" -f2`
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#echo "total mem" $TOTAL_MEM
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TOTAL_MEM_MB=`expr $TOTAL_MEM / 1024 / 1024`
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#echo "total mem in MB" $TOTAL_MEM_MB
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PAGESIZE=`grep 'hw.pagesize:' $SYSCTL_FILE | cut -d":" -f2`
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#echo "pagesize" $PAGESIZE
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ACTIVE_COUNT=`grep 'vm.stats.vm.v_active_count:' $SYSCTL_FILE | cut -d":" -f2`
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#echo "active_count" $ACTIVE_COUNT
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MEM_ACTIVE=`expr $ACTIVE_COUNT \* $PAGESIZE`
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#echo "mem active" $MEM_ACTIVE
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INACTIVE_COUNT=`grep 'vm.stats.vm.v_inactive_count:' $SYSCTL_FILE | cut -d":" -f2`
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#echo "inactive_count" $INACTIVE_COUNT
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MEM_INACTIVE=`expr $INACTIVE_COUNT \* $PAGESIZE`
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#echo "mem inactive" $MEM_INACTIVE
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CACHE_COUNT=`grep 'vm.stats.vm.v_cache_count:' $SYSCTL_FILE | cut -d":" -f2`
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#echo "cache_count" $CACHE_COUNT
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MEM_CACHE=`expr $CACHE_COUNT \* $PAGESIZE`
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#echo "mem cache" $MEM_CACHE
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FREE_COUNT=`grep 'vm.stats.vm.v_free_count:' $SYSCTL_FILE | cut -d":" -f2`
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#echo "free_count" $FREE_COUNT
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MEM_FREE=`expr $FREE_COUNT \* $PAGESIZE`
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#echo "mem free" $MEM_FREE
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FREE_MEM=`expr $MEM_INACTIVE + $MEM_CACHE + $MEM_FREE`
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#echo "free mem" $FREE_MEM
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#FREE_MEM_KB=`expr $FREE_MEM / 1024`
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#echo "free mem in KB" $FREE_MEM_KB
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FREE_MEM_MB=`expr $FREE_MEM / 1024 / 1024`
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#echo "free mem in MB" $FREE_MEM_MB
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USED_MEM=`expr $TOTAL_MEM - $FREE_MEM`
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#echo "used mem" $USED_MEM
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USED_MEM_MB=`expr $USED_MEM / 1024`
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#echo "used mem in MB" $USED_MEM
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USED_MEM_PER=`expr $USED_MEM \* 100 / $TOTAL_MEM`
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#echo "used mem %" $USED_MEM_PER
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if [ $USED_MEM_PER -ge $warn ];then
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if [ $USED_MEM_PER -ge $crit ]; then
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echo "CRITICAL - Memory Usage = $USED_MEM_PER%|MEM=$USED_MEM_PER;;;;"
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exit 2
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else
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echo "WARNING - Memory Usage = $USED_MEM_PER%|MEM=$USED_MEM_PER;;;;"
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exit 1
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fi
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else
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echo "OK - Memory Usage = $USED_MEM_PER%|MEM=$USED_MEM_PER;;;;"
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exit 0
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fi
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else
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echo "check_mem.sh - Nagios Plugin for checking memory usage"
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echo ""
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echo "Usage: check_mem.sh -w <warnlevel> -c <critlevel>"
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exit 3
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fi
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