/usr/share/munin/plugins/ipac-ng is in munin-plugins-extra 2.0.19-3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# -*- sh -*-
: << =cut
=head1 NAME
ipac-ng - Skeleton-plugin to monitor ipac-ng rules.
=head1 CONFIGURATION
No configuration
=head1 USAGE
To monitor a rule, copy ipac-ng and edit variables.
=head1 AUTHOR
Unknown author
=head1 LICENSE
GPLv2
=head1 MAGIC MARKERS
#%# family=contrib
#%# capabilities=autoconf
=cut
# Visible name of graph
TITLE="traffic"
# perlre(1) expressions passed to ipacsum -f. For more info
# `man ipacsum`, `man perlre`.
UP="upload rule"
DOWN="download rule"
if [ "$1" = "autoconf" ]; then
if [ -x /usr/sbin/fetchipac ] && [ -x /usr/sbin/ipacsum ]; then
echo yes
exit 0
else
echo no
exit 0
fi
fi
if [ "$1" = "config" ]; then
echo "graph_order down up"
echo "graph_title $TITLE"
echo 'graph_args --base 1000'
echo 'graph_vlabel b/s in (-) / out (+)'
echo 'down.label received'
echo 'down.graph no'
# Divide it by 1500 seconds (5m), to get b/s
echo 'down.cdef down,1500,/'
echo 'up.label b/s'
echo 'up.negative down'
echo 'up.cdef up,1500,/'
exit 0
fi;
fetchipac || error=1
if [ "$error" != "1" ]; then
ipacsum -s 5m -x -f "$UP" | tail -n 1 | cut -d : -f 2 | awk \
{'print "up.value " $1'}
ipacsum -s 5m -x -f "$DOWN" | tail -n 1 | cut -d : -f 2 | awk \
{'print "down.value " $1'}
else
echo 'up.value 0'
echo 'down.value 0'
fi
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