88 lines
2.5 KiB
Bash
88 lines
2.5 KiB
Bash
#!/bin/bash
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# editorconfig-checker-disable-file
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#
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# Plugin to check free ram space
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# using check_by_ssh
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# by Markus Walther (voltshock@gmx.de)
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# The script needs a working check_by_ssh connection and needs to run on the client to check it
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#
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# Command-Line for check_by_ssh
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# command_line $USER1$/check_by_ssh -H $HOSTNAME$ -p $ARG1$ -C "$ARG2$ $ARG3$ $ARG4$ $ARG5$ $ARG6$"
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#
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# Command-Line for service (example)
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# check_by_ssh!82!/nagios/check_ram.sh!20!10
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#
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##########################################################
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case $1 in
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--help | -h )
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echo "Usage: check_ram [warn] [crit]"
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echo " [warn] and [crit] as int"
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echo " Example: check_ram 20 10"
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exit 3
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;;
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* )
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;;
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esac
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warn=$1
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crit=$2
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if [[ "$1" == disabled ]]
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then
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echo "OK: Check disabled"
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exit 0
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fi
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if [ ! "$1" -o ! "$2" ]; then
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echo "Usage: check_ram [warn] [crit]"
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echo " [warn] and [crit] as int"
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echo " Example: check_ram 20 10"
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echo "Unknown: Options missing: using default (warn=20, crit=10)"
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warn=`echo $((20))`
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crit=`echo $((10))`
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fi
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full=`free | grep Mem | sed -r 's/\ +/\ /g' | cut -d \ -f 2`
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free=`free | grep "buffers/cache" | sed -r 's/\ +/\ /g' | cut -d \ -f 4`
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if [ "x$free" = "x" ]; then
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# The output of "free" has changed in winter 2014: It removed the
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# "buffers/cache" line, but added an "available" column. We're going
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# to use that new one.
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free=`free | grep Mem | sed -r 's/\ +/\ /g' | cut -d \ -f 7`
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fi
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if [ -r /proc/spl/kstat/zfs/arcstats ]
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then
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# This system is using ZFS. ZFS does not use the standard I/O
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# caching mechanism of Linux. As a result, ZFS caches appear as "in
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# use by an application", which is not entirely true, since they
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# will be freed when actual applications need memory.
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#
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# Add the current size of the ZFS ARC to the amount of free memory.
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free=$(gawk -vfree="$free" '/^size / { printf "%d\n", free + $3 / 1024 }' \
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/proc/spl/kstat/zfs/arcstats)
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fi
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if [ "$warn" -lt "$crit" -o "$warn" -eq "$crit" ]; then
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echo "Unknown: [warn] must be larger than [crit]"
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exit 3
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fi
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use=`echo $(( ($free * 100) / $full ))`
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if [ "$use" -gt "$warn" -o "$use" -eq "$warn" ]; then
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echo "OK: $use% free memory"
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exit 0
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elif [ "$use" -lt "$warn" -a "$use" -gt "$crit" ]; then
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echo "Warning: $use% free memory"
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exit 1
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elif [ "$use" -eq "$crit" -o "$use" -lt "$crit" ]; then
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echo "Critical: $use% free memory"
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exit 2
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else
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echo "Unknown"
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exit 3
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fi
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