Check all protocols in one command
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check_bird2_oneshot
Executable file
179
check_bird2_oneshot
Executable file
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#!/bin/sh
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# Copyright 2019 alarig <alarig@grifon.fr>
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#
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# BSD-3-Clause licence
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# For debuggin purpose, uncomment the next line and `tail -F` the file.
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#exec 2> /tmp/check_bgp.log
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# This scipt works with bird2 only
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CONF_IGNORE_FILE="/usr/local/etc/nrpe-bird/ignore.cfg"
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usage() {
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printf "Usage:\n"
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printf "Must be run with user account able to use birdc/birdc6 or "
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printf "specify -s to use birdc with sudo.\n"
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printf "To ignore sessions, put one per line in ${CONF_IGNORE_FILE}.\n"
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}
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args=$(getopt hs $*)
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if [ $? -ne 0 ]; then
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usage
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exit 3
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fi
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set -- $args
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while :; do
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case "$1" in
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-h)
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usage
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exit 0
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shift;;
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-s)
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SUDO='sudo'
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shift;;
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--)
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shift;
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break;;
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esac
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done
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test_route_limit() {
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if [ "${ROUTE_HIT_IN}" != "" ]; then
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printf "${protocol} has hit import route " >> \
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${DIR}/CRITICAL.txt
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printf "limit\n" >> ${DIR}/CRITICAL.txt
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elif [ "${ROUTE_HIT_OUT}" != "" ]; then
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printf "${protocol} has hit export route " >> \
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${DIR}/CRITICAL.txt
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printf "limit\n" >> ${DIR}/CRITICAL.txt
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elif [ ${RATIO_IN} -gt 92 ]; then
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printf "${protocol} import route limit is " >> \
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${DIR}/WARNING.txt
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printf "over threshold\n" >> ${DIR}/WARNING.txt
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fi
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}
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# path expansion for birdc and sudo of FreeBSD
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PATH="$PATH:/usr/local/sbin/:/usr/local/bin/"
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DIR="$(mktemp -d '/tmp/nrpe-bird.XXXX')"
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#$birdc 'show protocols' | awk '$2 ~ "BGP" && $4 !~ "down" { print $0 }' > \
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# ${DIR}/bgp_protocols_up.txt
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# The sed removes the first two lines (BIRD 2.0.2 ready and Name Proto blah)
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birdc 'show protocols all' | sed '1,2d;$d' | \
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awk -v RS= -v DIR=$DIR '{print > (DIR "/" $1 ".txt")}'
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for protocol in $(cat ${CONF_IGNORE_FILE}); do
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rm "${DIR}/${protocol}.txt"
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done
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for protocol in $(find ${DIR} -type f); do
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protocol_name=$(echo ${protocol} | cut -d / -f 4 | cut -d . -f 1)
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STATE="$(head -n 1 ${protocol} | awk '{ print $6 }')"
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ROUTE_LIMIT_IN="$(awk '/Import limit/ { print $3 }' ${protocol})"
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ROUTES_IMPORTED="$(grep 'Routes:' ${protocol} | \
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sed -Ee '/imported/{ s/^.* ([0-9]+) imported.*$/\1/; p;}' -e d)"
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ROUTE_HIT_IN="$(grep -E 'Receive limit:.*HIT' ${protocol})"
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if [ -z ${ROUTE_LIMIT_IN} ]; then
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# There is no import limit, so no ratio either
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RATIO_IN=0
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else
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RATIO_IN=$(echo "(${ROUTES_IMPORTED}*100)/${ROUTE_LIMIT_IN}" \
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| bc)
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fi
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ROUTE_HIT_OUT="$(grep -E 'Export limit:.*HIT' ${protocol})"
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# Plugin return codes:
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# https://nagios-plugins.org/doc/guidelines.html#AEN78
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case ${STATE} in
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# BGP
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# Session states:
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# https://gitlab.labs.nic.cz/labs/bird/blob/master/proto/bgp/bgp.h#L601
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Established)
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test_route_limit
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;;
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OpenSent | OpenConfirm)
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printf "${protocol} is in ${STATE} state\n" >> \
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${DIR}/WARNING.txt
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;;
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Idle | Connect | Active)
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printf "CRITICAL: ${protocol} is in ${STATE} state\n" \
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>> ${DIR}/CRITICAL.txt
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;;
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# OSPF
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# https://gitlab.labs.nic.cz/labs/bird/blob/master/proto/ospf/ospf.c#L532
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Running)
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test_route_limit
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;;
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Alone)
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printf "${protocol} is in ${STATE} state\n" >> \
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${DIR}/WARNING.txt
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exit 1
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;;
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# Or what
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*)
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if [ -z ${STATE} ]; then
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printf "Empty state for ${protocol_name}\n" \
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>> ${DIR}/UNKNOWN.txt
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else
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printf "Unknown state ${STATE} for " >> \
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${DIR}/UNKNOWN.txt
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printf "${protocol}\n" >> ${DIR}/UNKNOWN.txt
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fi
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;;
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esac
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done
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if [ -f ${DIR}/CRITICAL.txt ]; then
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printf "CRITICAL: $(cat ${DIR}/CRITICAL.txt)\n"
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rm -r ${DIR}
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exit 2
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elif [ -f ${DIR}/WARNING.txt ]; then
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printf "WARNING: $(cat ${DIR}/WARNING.txt)\n"
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rm -r ${DIR}
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exit 1
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elif [ -f ${DIR}/UNKNOWN.txt ]; then
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printf "UNKNOWN: $(cat ${DIR}/UNKNOWN.txt)\n"
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rm -r ${DIR}
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exit 3
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else
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printf "OK: This is fine\n"
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rm -r ${DIR}
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exit 0
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fi
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