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[/] [trunk/] [statistiky/] [opt/] [statistiky/] [collect_arp.sh] - Rev 1
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#!/bin/bash

PATH=/opt/rrdtool/bin:$PATH:/sbin:/usr/sbin

data_dir="/var/statistiky/arp"
mkdir -p $data_dir

cd ${data_dir}

config_file=/opt/statistiky/collect_arp.conf

function create()
{
    local filename=$1
    echo "    creating new arp2.rrd"

# zakladem je krok 5 sekund
# petiminutove useky se pocitaji z 60 PDP (primary data points) (12 za minutu * 5 minut)
# vsechny RRA se pocitaji primo z PDP, tj. dvouhodinove useky se pocitaji z 240 PDP
# za posledni tyden chceme 5minutove useky udaje => 12*24*9 = 2592 radku
# za posledni mesic chceme 20minutove useky => 3*24*38 = 2736 radku
# za posledni rok chceme dvouhodinove useky => 12*400 = 4800 radku
rrdtool create ${filename}.rrd --step 5 --start `date +%s`    \
                          DS:count:GAUGE:10:0:100     \
                          RRA:AVERAGE:0.7:1:1440     \
                          RRA:MAX:0.7:4:2880         \
                          RRA:MIN:0.7:4:2880         \
                          RRA:AVERAGE:0.7:4:2880     \
                          RRA:MAX:0.7:60:2592        \
                          RRA:MIN:0.7:60:2592        \
                          RRA:AVERAGE:0.7:60:2592    \
                          RRA:MAX:0.7:240:2736       \
                          RRA:MIN:0.7:240:2736       \
                          RRA:AVERAGE:0.7:240:2736   \
                          RRA:MAX:0.7:1440:4800      \
                          RRA:MIN:0.7:1440:4800      \
                          RRA:AVERAGE:0.7:1440:4800

}

function wait_to()
# $1 date for waiting to
{
    local time_now=`date +%s`;
    while [ $time_now -lt $1 ]
    do
        time_now=`date +%s`
        sleep 1;
    done
}

echo "Looking for arp.rrd"
if [ ! -f arp.rrd ] ; then
    create arp
fi
sleep 2;


start_time=`date +%s`
interval=$(( $start_time / 5 * 5 + 5 ))

while [ true ]
do
    . ${config_file}
    
    echo "Wait to $interval"
    wait_to $interval
    timenow=`date +%s`
    echo "Time now: `date +%s`"

    count="0"
    for net_dev in $DEVICES
    do
        count_dev=$(( `arp -n -i $net_dev | grep ether | grep -v "192.168" | wc -l` + 0 ))
        echo "    items in arp table $net_dev: $count_dev"
        let count+=$count_dev
    done
    echo "All items in arp table     : $count"


    if [ ! -z "${count}" ]
    then
        rrdtool update arp.rrd $timenow:$count
    fi
        
    interval=$(( $interval + 5 ))

done