#!/bin/sh
#
# Plugin for watching io-bound traffic (in bytes) on disks.
#
# Parameters:
#
# 	config   (required)
# 	autoconf (optional - used by munin-config)
#
# $Log: iostat.in,v $
# Revision 1.1.1.1  2006/06/04 20:53:57  he
# Import the client version of the Munin system monitoring/graphing
# tool -- project homepage is at http://munin.sourceforge.net/
#
# This package has added support for NetBSD, via a number of new plugin
# scripts where specific steps needs to be taken to collect information.
#
# I also modified the ntp_ plugin script to make it possible to not
# plot the NTP poll delay, leaving just jitter and offset, which IMO
# produces a more telling graph.
#
#
# Magic markers (optional - used by munin-config and some installation
# scripts):
#%# family=auto
#%# capabilities=autoconf

if [ "$1" = "autoconf" ]; then
    if [ -x /usr/sbin/iostat ]; then
	echo yes
	exit 0
    else
	echo "no (no /usr/sbin/iostat executable)"
	exit 0
    fi
fi

nf=`/usr/sbin/iostat -I -x | tail -1 | awk '{ print NF }'`
if [ $nf -eq 5 ]; then
    oldformat=true
else
    oldformat=false
fi

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

    echo 'graph_title IOstat by bytes'
    echo 'graph_args --base 1024 -l 0'

    if ! $oldformat; then
	echo 'graph_vlabel MB per ${graph_period} read (-) / written (+)'
    else
	echo 'graph_vlabel MB per ${graph_period} read+written'
    fi

    echo 'graph_category disk'
    echo 'graph_info This graph shows the I/O to and from block devices'

    drives=`/usr/sbin/iostat -I -x | awk '
/^device/ { next; }
// { print $1; }'`

    echo -n 'graph_order'
    for d in $drives; do
	if $oldformat; then
	    echo -n ' '${d}'_io'
	else
	    echo -n ' '${d}'_read '${d}'_write'
	fi
    done
    echo

    if $oldformat; then
	for d in $drives; do
	    echo "${d}_io.label ${d}"
	    echo "${d}_io.info I/O on device ${d}"
	    echo "${d}_io.type DERIVE"
	    echo "${d}_io.max 2000"
	    echo "${d}_io.min 0"
	done
    else
	for d in $drives; do
	    echo "${d}_read.label ${d}"
	    echo "${d}_read.type DERIVE"
	    echo "${d}_read.max 2000"
	    echo "${d}_read.min 0"
	    echo "${d}_read.graph no"

	    echo "${d}_write.label ${d}"
	    echo "${d}_write.info I/O on device ${d}"
	    echo "${d}_write.type DERIVE"
	    echo "${d}_write.max 2000"
	    echo "${d}_write.min 0"
	    echo "${d}_write.negative ${d}_read"
	done
    fi
    exit 0
fi

if $oldformat; then
    /usr/sbin/iostat -I -x | awk '
/^device/ { next; }
{
    print $1 "_io.value " int($5);
}
'
else
    /usr/sbin/iostat -I -x | awk '
/^device/ { next; }
{
    print $1 "_read.value " int($5);
    print $1 "_write.value " int($9);
}
'
fi