if_

#!/usr/bin/bash
# -*- sh -*-

# =head1 NAME
#
# if_ - Wildcard plugin to monitor traffic network interfaces
#
# =head1 CONFIGURATION
#
# =head2 ENVIRONMENT VARIABLES
#
# This plugin does not use environment variables
#
# =head2 WILDCARD PLUGIN
#
# This is a wildcard plugin. To monitor an interface, link
# if_<interface> to this file. E.g.
# 
#   ln -s /usr/share/munin/plugins/if_ \
#         /etc/munin/node.d/if_eth0
# 
# ...will monitor eth0.
#
# Any device found in /usr/bin/kstat can be monitored.
#
# =head1 AUTHOR
#
# Unknown author
#
# =head1 LICENSE
#
# GPLv2
#
# =head1 MAGIC MARKERS
#
#  #%# family=auto
#  #%# capabilities=autoconf suggest

. $MUNIN_LIBDIR/plugins/plugin.sh

INTERFACE=${0##*/if_}

if [ "$1" = "autoconf" ]; then
	if [ -x /usr/bin/kstat ]; then
		echo yes
		exit 0
	else
		echo "no (/usr/bin/kstat not found)"
		exit 0
	fi
fi

if [ "$1" = "suggest" ]; then
	if [ -x /usr/bin/kstat ]; then
		kstat -p -s rbytes64 | awk -F: '{ print $3 }'
		exit 0
	else
		exit 1
	fi
fi

if [ "$1" = "config" ]; then

	echo "graph_order rbytes obytes" 
	echo "graph_title $INTERFACE traffic"
	echo 'graph_args --base 1000'
	echo 'graph_vlabel bits per ${graph_period} in (-) / out (+)'
	echo 'graph_category network'
	echo 'rbytes.label received'
	echo 'rbytes.type DERIVE'
	echo 'rbytes.graph no'
	echo 'rbytes.cdef rbytes,8,*'
	echo 'rbytes.min 0'
	print_warning rbytes
	print_critical rbytes
	echo 'obytes.label bps'
	echo 'obytes.type DERIVE'
	echo 'obytes.negative rbytes'
	echo 'obytes.cdef obytes,8,*'
	echo 'obytes.min 0'
	print_warning obytes
	print_critical obytes
	exit 0
fi

kstat -C -c net -n $INTERFACE -s rbytes64 | sed 's/.*\(.bytes\)64./\1.value /'
kstat -C -c net -n $INTERFACE -s obytes64 | sed 's/.*\(.bytes\)64./\1.value /'