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#!/bin/sh
# Author: mario manno <projects@manno.name>
# Description: measure traffic for all xen hosts
# 
# 16.07.2008: improved the Plugin by Puzzle ITC to
# enable the traffic monitoring for domains
# with more than 1 one interface
# If there is more than one device, the domainname
# will get the vif name appended.
#
#%# family=auto
#%# capabilities=autoconf

if [ "$1" = "autoconf" ]; then
    if which xm > /dev/null ; then
        echo yes
    else
        echo "no (xm not found)"
        exit 1
    fi
    if [ -r /proc/net/dev ]; then
        echo yes
    else
        echo "no (/proc/net/dev not found)"
        exit 1
    fi
    exit 0
fi

if [ "$1" = "config" ]; then
    echo 'graph_title Xen Traffic'
    echo 'graph_vlabel bits received (-) / sent (+) per ${graph_period}'
    echo 'graph_args --base 1024 -l 0'
    echo 'graph_category xen'
    DOMAINS=$(xm list | awk '{print $1}' | egrep -v "^(Name|Domain-0)")
    for dom in $DOMAINS; do
    	devs=$( xm network-list $dom |\
        	egrep "^[0-9]+" | sed 's@^.*vif/\([0-9]*\)/\([0-9]*\).*$@vif\1.\2@')
        real_name=$( echo $dom | sed -e's/-/_/g' )
        name=$real_name
    	for dev in $devs; do
            if [ ${#devs} -gt 1 ]; then
                name=$real_name"_"`echo $dev | sed 's/\./\_/'`
            fi
        
            echo $name'Down.label received'
	        echo $name'Down.type COUNTER'
            echo $name'Down.graph no'
	        echo "${name}Down.cdef ${name}Down,8,*"
            echo "${name}Up.label ${name}"
	        echo $name'Up.type COUNTER'
            echo "${name}Up.negative ${name}Down"
	        echo "${name}Up.cdef ${name}Up,8,*"
	    done
    done
    exit 0
fi

DOMAINS=$(xm list | awk '{print $1}' | egrep -v "^(Name|Domain-0)")
for dom in $DOMAINS; do
    devs=$( xm network-list $dom |\
        egrep "^[0-9]+" | sed 's@^.*vif/\([0-9]*\)/\([0-9]*\).*$@vif\1.\2@')
    real_name=$( echo $dom | sed -e's/-/_/g' )
    name=$real_name
    for dev in $devs; do
            if [ ${#devs} -gt 1 ]; then
                name=$real_name"_"`echo $dev | sed 's/\./\_/'`
            fi
            awk -v name="$name" -v interface="$dev" \
                'BEGIN { gsub(/\./, "\\.", interface) } \
                $1 ~ "^" interface ":" {
                split($0, a, /: */); $0 = a[2]; \
                    print name"Down.value " $1 "\n"name"Up.value " $9 \
                }' \
            /proc/net/dev
     done
done