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‎check_pfSense.sh

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#!/bin/sh
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#Initial File: https://gitlab.unetresgrossebite.com/DevOps/puppet/blob/30bf4d18dd98d5dc1b658be56a312051f61ac9bc/modules/nagios/files/custom_plugins/check_pfsense
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#rewritten by Pit Wenkin
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#using stuff from: https://github.com/diogouchoas/check_pfsense/blob/master/check_pfsense.sh
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#Additions include:
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# - CPU check
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# - Load check
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# - Memory check
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# - Disk check (diskusage was confusing)
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# - Possibility to define custom warning/critical levels
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Prg=`basename $0`
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OK=0
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WARNING=1
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CRITICAL=2
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UNKNOWN=3
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ret=UNKNOWN
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community="public"
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target="127.0.0.1"
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query="firmware"
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port=1
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OID_MOUNTPOINT=".1.3.6.1.2.1.25.2.3.1.3"
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OID_FSBLKSIZE=".1.3.6.1.2.1.25.2.3.1.4"
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OID_FSBLKAMOUNT=".1.3.6.1.2.1.25.2.3.1.5"
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OID_FSBLKUSED=".1.3.6.1.2.1.25.2.3.1.6"
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OID_PROCS=".1.3.6.1.2.1.25.1.6.0"
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OID_USERS=".1.3.6.1.2.1.25.1.5.0"
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OID_STATES=".1.3.6.1.4.1.12325.1.200.1.3.1.0"
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OID_CPU=".1.3.6.1.4.1.2021.11.11.0"
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OID_LOAD=".1.3.6.1.4.1.2021.10.1.3.1"
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OID_LOAD5=".1.3.6.1.4.1.2021.10.1.3.2"
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OID_LOAD15=".1.3.6.1.4.1.2021.10.1.3.3"
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OID_MEMT=".1.3.6.1.4.1.2021.4.5.0"
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OID_MEMF=".1.3.6.1.4.1.2021.4.11.0"
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OID_DISK_UPCT=".1.3.6.1.4.1.2021.9.1.9.1"
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OID_DISK_TOT=".1.3.6.1.4.1.2021.9.1.6.1"
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OID_DISK_FREE=".1.3.6.1.4.1.2021.9.1.7.1"
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usage()
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{
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echo "Usage: $Prg -H host -C community -t query -w warning -c critical"
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echo " query: cpu"
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echo " query: disk"
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echo " query: diskusage [-d disknbr]"
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echo " query: load"
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echo " query: memory"
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echo " query: procs"
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echo " query: states"
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echo " query: users"
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}
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if test -z "$1"; then
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usage
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exit $UNKNOWN
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fi
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while getopts H:C:t:d:w:c:h OPT
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do
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case $OPT in
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H) target=$OPTARG ;;
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C) community=$OPTARG ;;
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t) query=$OPTARG ;;
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d) disk=$OPTARG ;;
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w) warning=$OPTARG ;;
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c) critical=$OPTARG ;;
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h)
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usage
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exit $UNKNOWN
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;;
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esac
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done
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if test $query = diskusage; then
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for i in `seq 1 100`
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do
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test "$disk" && i=$disk
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mpt=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_MOUNTPOINT.$i | sed 's|"||g'`
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echo "$mpt" | grep UMA && break
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echo "$mpt" | grep MALLOC && break
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bsz=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_FSBLKSIZE.$i`
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tsz=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_FSBLKAMOUNT.$i`
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usz=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_FSBLKUSED.$i`
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tsz=`expr $tsz '*' $bsz`
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usz=`expr $usz '*' $bsz`
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free=`expr $tsz - $usz`
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if echo "$mpt" | grep '^/,'; then
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if test `expr $free '*' 20` -lt $tsz; then
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ret=CRITICAL
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elif test `expr $free '*' 10` -lt $usz; then
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ret=WARNING
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elif test $tsz -ge 0 -a $usz -ge 0; then
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ret=OK
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fi
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fi
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for val in free usz tsz
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do
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unit=b
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eval i=\$$val
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while :
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do
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case $unit in
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b) unit=k ;;
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k) unit=M ;;
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M) unit=G ;;
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G) unit=T ;;
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T) unit=P ;;
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P) unit=E ;;
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E) unit=Z ;;
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*) break ;;
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esac
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if test `expr $i / 1024` -lt 1024; then
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i="`expr $i / 1024`.`expr $i % 1024`"
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break
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fi
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i=`expr $i / 1024`
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done
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eval $val=$i$unit
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done
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test "$msg" && msg="$msg,"
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msg="$msg $mpt usage: $free/$usz/$tsz (free/used/tot)"
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test "$disk" && break
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done
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elif test $query = disk; then
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diskpct=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_DISK_UPCT`
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#disktot=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_DISK_TOT`
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diskfree=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_DISK_FREE`
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if test $diskpct -gt $critical; then
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ret=CRITICAL
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elif test $diskpct -gt $warning; then
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ret=WARNING
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elif test $diskpct -ge 0; then
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ret=OK
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fi
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for val in free diskfree
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do
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unit=b
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eval i=\$$val
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while :
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do
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case $unit in
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b) unit=k ;;
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k) unit=M ;;
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M) unit=G ;;
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G) unit=T ;;
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T) unit=P ;;
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P) unit=E ;;
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E) unit=Z ;;
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*) break ;;
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esac
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if test `expr $i / 1024` -lt 1024; then
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i="`expr $i / 1024`.`expr $i % 1024`"
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break
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fi
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i=`expr $i / 1024`
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done
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eval $val=$i$unit
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done
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msg=" free space: / $diskfree ($diskpct%)"
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elif test $query = users; then
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res=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_USERS`
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warning=${warning:='5'}
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critical=${critical:='10'}
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if test $res -gt $critical; then
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ret=CRITICAL
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elif test $res -gt $warning; then
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ret=WARNING
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elif test $res -ge 0; then
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ret=OK
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fi
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msg=" $res active sessions"
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elif test $query = cpu; then
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res=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_CPU`
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used=`expr 100 - $res`
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warning=${warning:='50'}
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critical=${critical:='75'}
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if test $used -gt $critical; then
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ret=CRITICAL
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elif test $used -gt $warning; then
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ret=WARNING
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elif test $used -ge 0; then
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ret=OK
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fi
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msg=" $used% cpu used - $warning/$critical"
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elif test $query = load; then
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load=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_LOAD | sed 's|"||g'`
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load5=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_LOAD5 | sed 's|"||g'`
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load15=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_LOAD15 | sed 's|"||g'`
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load100=$(echo "scale=0; 100*$load" | bc)
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load105=$(echo "scale=0; 100*$load5" | bc)
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load115=$(echo "scale=0; 100*$load15" | bc)
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load100=$(echo $load100 |cut -d '.' -f 1)
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load105=$(echo $load105 |cut -d '.' -f 1)
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load115=$(echo $load115 |cut -d '.' -f 1)
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warning=${warning:='0.75'}
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critical=${critical:='1'}
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warning100=$(echo "scale=0; 100 * $warning" | bc)
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critical100=$(echo "scale=0; 100 * $critical" | bc)
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warning100=$(echo $warning100 |cut -d '.' -f 1)
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critical100=$(echo $critical100 |cut -d '.' -f 1)
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if test $load105 -gt $critical100; then
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if test $load115 -gt $critical100; then
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ret=CRITICAL
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else
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ret=WARNING
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fi
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elif test $load105 -gt $warning100; then
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if test $load115 -gt $warning100; then
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ret=CRITCAL
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else
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ret=WARNING
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fi
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else
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ret=OK
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fi
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msg=" load = $load, $load5, $load15"
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elif test $query = memory; then
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memt=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_MEMT | sed 's|"||g'`
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memf=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_MEMF | sed 's|"||g'`
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memf_pct=$(echo "scale=0; $memf*100/$memt" | bc)
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memu=$(($memt-$memf))
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memu_pct=$((100-$memf_pct))
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warning=${warning:='70'}
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critical=${critical:='80'}
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warning=$(echo $warning |cut -d ',' -f 1)
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critical=$(echo $critical |cut -d ',' -f 1)
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if test $memu_pct -gt $critical; then
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ret=CRITICAL
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elif test $memu_pct -gt $warning; then
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ret=WARNING
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elif test $memu_pct -ge 0; then
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ret=OK
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fi
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for val in free memt memf memu
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do
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unit=b
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eval i=\$$val
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while :
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do
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case $unit in
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b) unit=k ;;
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k) unit=M ;;
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M) unit=G ;;
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G) unit=T ;;
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T) unit=P ;;
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P) unit=E ;;
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E) unit=Z ;;
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*) break ;;
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esac
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if test `expr $i / 1024` -lt 1024; then
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i="`expr $i / 1024`.`expr $i % 1024`"
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break
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fi
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i=`expr $i / 1024`
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done
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eval $val=$i$unit
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done
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msg=" Memory usage: $memu_pct% - Total: $memt, used: $memu, free: $memf"
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elif test $query = procs; then
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res=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_PROCS`
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warning=${warning:='150'}
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critical=${critical:='200'}
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if test $res -gt $critical; then
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ret=CRITICAL
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elif test $res -gt $warning; then
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ret=WARNING
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elif test $res -ge 0; then
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ret=OK
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fi
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msg=" $res processes"
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elif test $query = states; then
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res=`snmpget -t2 -r2 -v1 -c $community -Ovq $target $OID_STATES`
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warning=${warning:='15000'}
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critical=${critical:='20000'}
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if test $res -gt $critical; then
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ret=CRITICAL
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elif test $res -gt $warning; then
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ret=WARNING
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elif test $res -gt 0; then
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ret=OK
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fi
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msg=" $res states"
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fi >/dev/null 2>&1
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echo $ret$msg$pefdata
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eval ret=\$$ret
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exit $ret
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