check_reachable の mtr を使ったバージョン: mtr のバージョンは 0.84 以降が必要

check_reachable_by_mtr

#!/bin/bash

NAGIOS_OK=0
NAGIOS_WARNING=1
NAGIOS_CRITICAL=2
NAGIOS_UNKNOWN=3

PROGNAME="check_reachable"
VERSION="1.0"

MTR=/usr/bin/mtr

print_usage() {
	echo "$PROGNAME $VERSION"
	echo "Usage:"
	echo "$PROGNAME -H TARGET -r hop:ROUTE1[,hop2:ROUTE2[,:ROUTE3]]"
	echo " "
	echo "Example:"
	echo "$PROGNAME -H 8.8.8.8 -r 3:192.168.1.254,192.168.2.254"
}

declare -a ROUTE
while getopts C:dH:m:p:r:TW:w: OPT; do
    case "$OPT" in
        C) CRIT_RTT="$OPTARG";;
        d) DEBUG=1;;
        H) TARGET="$OPTARG";;
        m) MAXTTL="$OPTARG";;
        p) PORT="$OPTARG";;
        r) ROUTE[${#ROUTE[@]}]="$OPTARG";;
        T) METHOD="-T";;
        W) WARN_RTT="$OPTARG";;
        w) WAIT="$OPTARG";;
    esac
done

if [ -z "$TARGET" ]; then
	print_usage
	exit $NAGIOS_UNKNOWN
fi

ERRCODE=3

METHOD=${METHOD:-""}

declare -a output
oIFS="$IFS"
IFS=';'
while read MTR_VERSION time OK Hostname hop name last 2>/dev/null
do
    output[$hop]="$hop: $name $last"
    [ -n "$DEBUG" ] && echo "$hop: $name $last"
    if [ "$name" = "???" ]; then
        unreachable=$hop
    else
        unreachable=
    fi
done < <( $MTR --csv --show-ips -c 3 ${MAXTTL:+'-m'} $MAXTTL ${WAIT:+'-i'} $WAIT $METHOD ${PORT:+'-P'} $PORT $TARGET 2>&1 )
IFS="$oIFS"

if [ -n "$unreachable" ]; then
    echo "ERROR $TARGET: unreachable after hop $((unreachable - 1))"
    i=$((unreachable - 3))
    if [ $i -le 0 ]; then
        i=0
    fi
    while [ $i -le $unreachable ]; do
        echo "${output[$i]}"
        i=$((i + 1))
    done   
    exit $NAGIOS_CRITICAL
fi

ERRCODE=$NAGIOS_OK

r=$(host "$TARGET" | awk '/has address/ {print $NF}')
h=${#output[@]}
case "${output[$h]}" in
    *"$r"*) ;;
    *) [ -n "$MAXTTL" ] && [ $h -eq $MAXTTL ] || { ERRCODE=$NAGIOS_WARNING; ERRMSG="does not reach $TARGET"; };;
esac

k=0
while [ $k -lt ${#ROUTE[@]} ]; do
    oIFS="$IFS"
    IFS=",$IFS" 
    set -- ${ROUTE[$k]}
    IFS="$oIFS"

    found=
    declare -a gateways=($@)
    for gw in ${gateways[@]}; do
        case "$gw" in
            *:*)
		h=$(expr $gw : '\([1-9][0-9]*\):.*')
		r=$(expr $gw : '.*:{0,1}\(.*\)')
                ;;
            *)
		r="$gw"
                ;;
        esac
        if [ -n "$h" ]; then
	    case "${output[$h]}" in
		*$r*) found=$h;;
		*) ERRCODE=$NAGIOS_WARNING; ERRMSG="$h not found in path"; break;;
	    esac
        else
            i=0
            while [ $i -le ${#output[@]} ]; do
		case "${output[$i]}" in
		    *$r*) found=$i; break;;
		esac
                i=$((i + 1))
            done
        fi
    done
    if [ -z "$found" ]; then
	ERRCODE=$NAGIOS_WARNING
        ERRMSG="${ROUTE[$k]} not found in path"
	break
    fi
    k=$((k + 1))
done

hop=${#output[@]}
if [ "$ERRCODE" -eq "$NAGIOS_OK" ]; then
    rtt=${output[$hop]##*' '}
    rttms=$(expr "$rtt" : '\(.*\)...').$(expr "$rtt" : '.*\(...\)')  
    if [ -n "$CRIT_RTT" ] && [ $rtt -ge "$CRIT_RTT" ]; then
        echo "CRITICAL ${output[$hop}]} | hop=$hop;;;; rtt=${rttms}ms;;;;"
        ERRCODE=NAGIOS_CRITICAL
    elif [ -n "$WARN_RTT" ] && [ $rtt -ge "$WARN_RTT" ]; then
        echo "WARNING ${output[$hop]} | hop=$hop;;;; rtt=${rttms}ms;;;;"
        ERRCODE=NAGIOS_WARNING
    else
        echo "OK ${output[$hop]} | hop=$hop;;;; rtt=${rttms}ms;;;;"
    fi
else
    echo "ERROR $ERRMSG | hop=;;;; rtt=;;;;"
fi

i=1
while [ $i -le ${#output[@]} ]; do
    echo "${output[$i]}"
    i=$((i + 1))
done

exit $ERRCODE