Script: interface traffic (linux)

[gregm]

Just thought this might be handy. I'm running RH7.1, and don't have IP accounting compilied into the kernel (this is on a production server, I don't want to mess with the kernel now), so netstat doesn't show the traffic data.

However, I came across the data in /proc/net/dev (couldn't find a util to extract it) so here's a quick script to extract the data:

Code: Select all

#!/usr/local/bin/php -q
<?php

/* Greg MacLellan, Oct 19, 2002

Accepts interface name as paramter: ie,

./nettraffic.php eth0

Outputs bytes recieved/sent, seperated by a space.

*/

if (empty($_SERVER["argv"][1])) {
        echo "Usage: ".$_SERVER["argv"][0]." <interface>\n";
        echo "Outputs: <bytes recvd> <bytes sent>\n";
        exit(1);
}

$info = file("/proc/net/dev");
for ($i = 2; $i < count($info); $i++) {
        $interface = trim(substr($info[$i], 0, 6));
        $data = explode(" ", trim(substr($info[$i], 7)));
        if ($_SERVER["argv"][1] == $interface) {
                // bytes recvd,        sent
                echo $data[0]." ".$data[38]."\n";
                exit(0);
        }
}

?>

[raX]

Excellent, thanks for sharing. I am going to move this thread to the scripts and addons forum though so more people will be able to find it.

-Ian

[Guest]

Man, I just found this after I wrote my own script... lol... *sigh*

[dbenders]

Hi, I don't undertand for what we need this script if we can get the traffic of a linux using the "Get SNMP Network Data" that already comes with CACTI ?

I'm working with this in a LINUX and works perfect.

[bulek]

There are people that don't use or don't want to use SNMP for some reason so such script can be useful. It's good to have two options anyway

- bulek

[crypted]

Can someone help me install this script? I have it setup in scripts/ and am not too sure exacty how to load it although I have attempted. I may or may not have made the right kind of data input method but after that point I can't figure out how to get that input method into becoming a graph. So if I could get the steps from after putting it on the server all the way to setting up the graph I'd appreciate it.

[gregm]

It's written in PHP, which means you need the PHP-CLI binary.

Paste it into a file called "nettraffic" or whatever, probably in your cacti scripts directory, but it doesnt really matter as long as cacti can run it, and run "chmod a+x nettraffic".

After that, as long as you can run it manually ("./nettraffic eth0") and get some numbers, it should be working fine. Just add it as an input source with two fields.

[crypted]

As an input source with two fields how? I'm not following as far as setting it up via the php webconsole.

Add it as a "data input method" with the line: perl <path_cacti>/scripts/netstatint.pl <> <> and that being it? Or is there something else I'm not understanding?

[gregm]

Uh.. it's not perl, it's php. And you need to specify names:

<path_cacti>/scripts/nettraffic <recvd> <sent>

Something like that. Then add output fields (stored in RRA) for "recvd" and "sent"

At this point, you should be reading the Cacti documentation, it's all there.