146 lines
4 KiB
Bash
Executable file
146 lines
4 KiB
Bash
Executable file
#!/bin/sh
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# Copyright 2017 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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usage() {
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printf "Usage:\n"
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printf "check_bgp [-4|-6] -p session\n"
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printf "Must be run with user account able to use birdc/birdc6 or use"
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printf "-s to use birdc with sudo.\n"
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}
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args=$(getopt 46hsp: $*)
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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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;;
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-4)
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VERSION="IPv4"
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shift
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;;
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-6)
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VERSION="IPv6"
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shift
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;;
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-s)
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SUDO='sudo'
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shift
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;;
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-p)
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SESSION="$2"
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shift; shift
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;;
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--)
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shift; break
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;;
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esac
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done
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# path expansion for birdc and sudo of FreeBSD
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PATH="$PATH:/usr/local/sbin/:/usr/local/bin/"
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if [ "${VERSION}" = "IPv4" ]; then
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birdc="${SUDO} birdc -r"
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elif [ "${VERSION}" = "IPv6" ]; then
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birdc="${SUDO} birdc6 -r"
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else
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printf "CRITICAL: Invalid IP version, use -4 for IPv4 and -6 for IPv6\n"
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exit 2
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fi
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if [ -z ${SESSION} ]; then
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printf "CRITICAL: No session name supplied, use -p \$session.\n"
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exit 2
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fi
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STATE="$($birdc show protocol ${SESSION} | \
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awk -v session=${SESSION} '$0 ~ session { print $6 }')"
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ROUTE_LIMIT_IN="$($birdc show protocol all ${SESSION} | \
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awk '/Receive limit/ { print $3 }')"
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ROUTES_IMPORTED="$($birdc show protocol all ${SESSION} | grep 'Routes:' | \
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sed -Ee '/imported/{ s/^.* ([0-9]+) imported.*$/\1/; p;}' -e d)"
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ROUTE_HIT_IN="$($birdc show protocol all ${SESSION} | \
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grep -E 'Receive limit:.*HIT')"
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RATIO_IN=$(echo "(${ROUTES_IMPORTED}*100)/${ROUTE_LIMIT_IN}" | bc)
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ROUTE_HIT_OUT="$($birdc show protocol all ${SESSION} | \
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grep -E 'Export limit:.*HIT')"
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# Session states: https://gitlab.labs.nic.cz/labs/bird/blob/master/proto/bgp/bgp.c#L1465
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# Plugin return codes: https://nagios-plugins.org/doc/guidelines.html#AEN78
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case ${STATE} in
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Established)
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if [ ${RATIO_IN} -lt 90 ]; then
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printf "OK: ${SESSION} is ${STATE}\n"
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exit 0
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elif [ "${ROUTE_HIT_IN}" != "" ]; then
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printf "CRITICAL: ${SESSION} has hit import route "
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printf "limit\n"
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exit 2
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elif [ "${ROUTE_HIT_OUT}" != "" ]; then
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printf "CRITICAL: ${SESSION} has hit export route "
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printf "limit\n"
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exit 2
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else
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printf "WARNING: ${SESSION} import route limit is "
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printf "over thresold\n"
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exit 1
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fi
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;;
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OpenSent | OpenConfirm)
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printf "WARNING: ${SESSION} is in ${STATE} state\n"
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exit 1
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;;
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Idle | Connect | Active)
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printf "CRITICAL: ${SESSION} is in ${STATE} state\n"
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exit 2
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;;
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*)
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printf "Unknown state: ${STATE}\n"
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exit 3
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;;
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esac
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