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This commit is contained in:
Eric Loyd
Executable
+152
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#!/bin/bash
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hostname=""
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community=""
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counter=""
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perfName=""
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iname=""
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inum=""
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debug=""
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min=""
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max=""
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warn=""
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crit=""
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exitCode="0"
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statusText="OK"
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# snmpwalk -v 2c -c public 192.168.0.1 1.3.6.1.2.1.2.2.1.2 | sed -e "s/^IF-MIB::ifDescr.//" | awk '{print $NF, $1}' | while read iname inum; do echo "$iname"; for oid in 1.3.6.1.2.1.2.2.1.5 1.3.6.1.2.1.2.2.1.10 1.3.6.1.2.1.2.2.1.16 1.3.6.1.2.1.2.2.1.20; do snmpget -v 2c -c public 192.168.0.1 ${oid}.${inum}; done; done
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# current bandwidth snmpwalk -v 2c -c public 192.168.1.1 1.3.6.1.2.1.2.2.1.5
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# octets received snmpwalk -v 2c -c public 192.168.1.1 1.3.6.1.2.1.2.2.1.10
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# octets sent snmpwalk -v 2c -c public 192.168.1.1 1.3.6.1.2.1.2.2.1.16
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# error octets 1.3.6.1.2.1.2.2.1.20
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do_debug() {
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[ -z "$debug" ] && return
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echo "DEBUG: $*" >&2
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}
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do_help() {
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echo "Usage: $0 -H <hostname> -C <community> [-I <interface name> | -i <inum>) -t (b|r|s|e) [-w <warn>] [-c <crit>]"
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# -w <warn> -c <crit> -m <min> -M <max> [-d] (kp | flux)"
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exit
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}
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while getopts "dhC:H:I:i:t:w:c:" opt; do
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case "$opt" in
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H) hostname="$OPTARG";;
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I) iname="$OPTARG";;
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i) inum="$OPTARG";;
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t) counter="$OPTARG";;
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C) community="$OPTARG";;
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w) warn="$OPTARG";;
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c) crit="$OPTARG";;
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h) do_help;;
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d) debug="true";;
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esac
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done
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shift $((OPTIND - 1))
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command="$@"
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do_debug "host=$hostname iname=$iname inum=$inum counter=$counter warn=$warn crit=$crit"
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[ -z "$hostname" ] && echo "No hostname specified." && exit 0
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[ -z "$community" ] && echo "No community specified." && exit 0
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check_threshold() {
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local val=$1
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local range=$2
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local alert_inside=0
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local start=0
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local end="inf"
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# Handle empty thresholds safely
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if [[ -z "$range" ]]; then return 0; fi
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# Check for the inside-range prefix '@'
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if [[ "$range" == @* ]]; then
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alert_inside=1
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range="${range#@}" # Strip the '@'
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fi
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# Parse start and end values out of the range colon (:) syntax
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if [[ "$range" == *:* ]]; then
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start="${range%%:*}"
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end="${range#*:}"
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# Handle implicit defaults
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[[ -z "$start" ]] && start=0
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[[ "$start" == "~" ]] && start="-inf"
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[[ -z "$end" ]] && end="inf"
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else
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# No colon: Shorthand for 0:X
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start=0
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end="$range"
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fi
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# Evaluate logic using bc (handles floats and floating point math)
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local outside=0
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# Check lower boundary; inclusive of endpoints
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if [[ "$start" != "-inf" ]]; then
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if (( $(echo "$val < $start" | bc -l) )); then outside=1; fi
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fi
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# Check upper boundary; inclusive of endpoints
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if [[ "$end" != "inf" ]]; then
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if (( $(echo "$val > $end" | bc -l) )); then outside=1; fi
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fi
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# Return true/false based on whether the @ symbol inverted the logic
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if [[ $alert_inside -eq 1 ]]; then
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# Alert if INSIDE the range
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if [[ $outside -eq 0 ]]; then return 1; else return 0; fi
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else
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# Alert if OUTSIDE the range (Standard Nagios Behavior)
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if [[ $outside -eq 1 ]]; then return 1; else return 0; fi
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fi
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}
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do_snmp() {
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myNum="$1"
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myOid="$2"
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myName="$3"
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do_debug "checking $hostname for $myName (inum: $myNum) on $myOid:"
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output=$(snmpget -v 2c -c $community $hostname ${myOid}.${myNum} | awk '{print $NF}')
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if [ -z "$output" ]; then
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echo "UNKNOWN: snmpget error"
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exit 3
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else
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echo "$output"
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fi
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}
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do_stats() {
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myNum="$1"
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myName="$2"
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myOid=""
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do_debug "do_stats: myNum=$myNum myName=$myName myOid=$myOid"
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case "$counter" in
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b) counter="Bandwidth"; perfName="'bw_bytes'"; myOid="1.3.6.1.2.1.2.2.1.5";;
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r) counter="Received"; perfName="'bytes_recv'"; myOid="1.3.6.1.2.1.2.2.1.10";;
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s) counter="Sent"; perfName="'bytes_sent'"; myOid="1.3.6.1.2.1.2.2.1.16";;
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e) counter="Errors"; perfName="'bytes_errors'"; myOid="1.3.6.1.2.1.2.2.1.20";;
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*) echo "Invalid counter type specified."; exit 0;;
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esac
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do_debug "do_stats: do_snmp $myNum $myOid $myName"
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value=$(do_snmp $myNum $myOid $myName)
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# CRITICAL check must always run first to ensure it takes precedence
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if ! check_threshold "$value" "$crit"; then
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exitCode=2
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statusText="CRITICAL"
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elif ! check_threshold "$value" "$warn"; then
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exitCode=1
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statusText="WARNING"
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fi
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# [ "$value" != "?" ] && value=$(printf "%.4f" "$value")
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echo "$myName $counter $statusText: $value|$perfName=${value}B;$warn;$crit;$min;$max"
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exit $exitCode
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}
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if [ -n "$inum" ]; then
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do_debug "Specified inum=$inum"
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do_stats $inum
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else
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do_debug "Did not specify an inum"
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do_debug "snmpwalk -v 2c -c $community $hostname 1.3.6.1.2.1.2.2.1.2"
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snmpwalk -v 2c -c $community $hostname 1.3.6.1.2.1.2.2.1.2 | sed -e "s/^IF-MIB::ifDescr.//" | awk '{print $1, $NF}' | while read myNum myName; do
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[ -z "$iname" -a -z "$inum" ] && echo "iname: $myName (inum: $myNum)" && continue # Show interfaces if we didn't specify one
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[ "$iname" != "$myName" ] && continue
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do_debug "Found $iname (ifnum: $myNum)"
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do_stats $myNum
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done
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fi
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