66 lines
2.1 KiB
Plaintext
66 lines
2.1 KiB
Plaintext
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#!/bin/sh
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#
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# Copyright (c) 2015 Babak Farrokhi. All rights reserved.
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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
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
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# 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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#
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# March-2017 @farrokhi
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# This plugin extracts "ip input" buffer overruns using sysctl and feeds
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# to munin (or any other compatible agent) for graphing
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#
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# Buffer overrung on IP Input happens when CPU is not fast enough
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# to pick ip packet from queue. This can be observed by seeing a
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# CPU hogging "task queue" process in top.
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#
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# Magic markers:
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#%# family=auto
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#%# capabilities=autoconf
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SCRIPT_NAME=$(basename $0)
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if [ $# -lt 1 ]; then
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DROPS=`sysctl -n net.inet.ip.intr_queue_drops`
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echo ip_idrops.value ${DROPS}
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elif [ "$1" == "autoconf" ]; then
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echo yes
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exit 0
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elif [ "$1" == "config" ]; then
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echo "graph_title IP Input Drops"
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echo "graph_args --lower-limit 0 --base 1000"
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echo "graph_vlabel packets / second"
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echo "graph_category system"
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echo ip_idrops.label "Input Drops"
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echo ip_idrops.type DERIVE
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echo ip_idrops.min 0
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fi
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