bundles/sshmon: import from work repository

bundles/sshmon/files/check_ram

@@ -0,0 +1,86 @@
+#!/bin/bash
+# 
+# Plugin to check free ram space
+# using check_by_ssh
+# by Markus Walther (voltshock@gmx.de)
+# The script needs a working check_by_ssh connection and needs to run on the client to check it
+# 
+# Command-Line for check_by_ssh
+# command_line $USER1$/check_by_ssh -H $HOSTNAME$ -p $ARG1$ -C "$ARG2$ $ARG3$ $ARG4$ $ARG5$ $ARG6$"
+# 
+# Command-Line for service (example)
+# check_by_ssh!82!/nagios/check_ram.sh!20!10
+#
+##########################################################
+
+case $1 in
+  --help | -h )
+        echo "Usage: check_ram [warn] [crit]"
+        echo " [warn] and [crit] as int"
+        echo " Example: check_ram 20 10"
+        exit 3
+         ;;
+  * )
+    ;;
+esac
+
+warn=$1
+crit=$2
+
+if [[ "$1" == disabled ]]
+then
+        echo "OK: Check disabled"
+        exit 0
+fi
+
+if [ ! "$1" -o ! "$2" ]; then
+        echo "Usage: check_ram [warn] [crit]"
+        echo " [warn] and [crit] as int"
+        echo " Example: check_ram 20 10"
+        echo "Unknown: Options missing: using default (warn=20, crit=10)"
+        warn=`echo $((20))`
+        crit=`echo $((10))`
+fi
+
+full=`free | grep Mem | sed -r 's/\ +/\ /g' | cut -d \  -f 2`
+free=`free | grep "buffers/cache" | sed -r 's/\ +/\ /g' | cut -d \  -f 4`
+if [ "x$free" = "x" ]; then
+    # The output of "free" has changed in winter 2014: It removed the
+    # "buffers/cache" line, but added an "available" column. We're going
+    # to use that new one.
+    free=`free | grep Mem | sed -r 's/\ +/\ /g' | cut -d \  -f 7`
+fi
+
+if [ -r /proc/spl/kstat/zfs/arcstats ]
+then
+    # This system is using ZFS. ZFS does not use the standard I/O
+    # caching mechanism of Linux. As a result, ZFS caches appear as "in
+    # use by an application", which is not entirely true, since they
+    # will be freed when actual applications need memory.
+    #
+    # Add the current size of the ZFS ARC to the amount of free memory.
+    free=$(gawk -vfree="$free" '/^size / { printf "%d\n", free + $3 / 1024 }' \
+        /proc/spl/kstat/zfs/arcstats)
+fi
+
+if [ "$warn" -lt "$crit" -o "$warn" -eq "$crit" ]; then
+   echo "Unknown: [warn] must be larger than [crit]"
+        exit 3
+fi
+
+use=`echo $(( ($free * 100) / $full ))`
+
+if [ "$use" -gt "$warn" -o "$use" -eq "$warn" ]; then
+        echo "OK: $use% free memory"
+        exit 0
+ elif [ "$use" -lt "$warn" -a "$use" -gt "$crit" ]; then
+        echo "Warning: $use% free memory"
+        exit 1
+ elif [ "$use" -eq "$crit" -o "$use" -lt "$crit" ]; then
+        echo "Critical: $use% free memory"
+        exit 2
+ else
+        echo "Unknown"
+        exit 3
+fi
+