Re: Multiple IP MRTG or Similar
From: Adam Jacob Muller (adam_at_oxeo.com)
Date: Wed, 6 Jul 2005 01:27:07 -0400 To: G Felter <email@example.com>
MRTG and everything else for that matter monitors at the kernel level.
basically this means that you are monitoring on a per interface
basis, not a per address basis.
If you plan on having 12 ips on 1 interface you can not break out the
bandwidth usage per IP.
The solution we use on our virtually hosted machines is to use an
apache "traffic" log to track the bandwidth usage of apache.
Obviously this does not track bandwidth usage from FTP or SSH however
we basically consider this bandwidth incidental and ignore it.
That said, if your customers will have root access then it's
"possible" to compromise this system. It's also useless if they
intend to have other kinds of servers besides apache running.
All that said, I highly suggest that if you do decide to use MRTG
that you use the rrdtool backend, rrdtool is basically the gold
standard in the IT industry. Remember, rrdtool, MRTG and cacti are
not the same type of thing.
RRDTool is an interface to rrd's that is, round robin databases,
these binary packed files are used to store data. That's basically
it. I use it for everything from storing bandwidth to storing the
data from my hydroponic garden. That said, MRTG is a data gathering
tool. It is designed to gather data from a SNMP (or other types of)
query and put it into some kind of storage medium. MRTG is built with
the basic support for flat ASCII logs but i don't know of anyone that
uses that anymore. It's highly susceptible to corruption. use the RRD
logging if you go with MRTG.
Now, finally, there is cacti. Cacti integrates MRTG and RRDTool to
create a pretty web interface.
Basically, we need to know exactly what kind of stuff your customers
plan on doing.
AFAIK this is possible under linux using interface aliases. I'm not
sure about FreeBSD.
On Jul 5, 2005, at 10:33 PM, G Felter wrote:
> I just want to introduce myself to the list. My name is Greg and I
> have been using FreeBSD for about four years, I have even swore off
> Windows and use FreeBSD as my workstation.
> I am writing because I have a FreeBSD server which I provide shell
> accounts to customers with. I soon hope to provide jails after
> working out some glitches. I need to monitor each customers bandwidth
> usage on a per IP basis. I know MRTG is basically the standard but I
> am open to suggestions. I seem to have trouble setting up MRTG myself
> and have consulted several people for the purpose having them set up
> MRTG. They have told me they can only set up MRTG on FreeBSD for the
> main IP of the server and not for each individual IP. I know there
> are providers monitoring the bandwidth of each IP in FreeBSD. Which
> script are they using to do this, MRTG, cacti, RRDTool, cricket? If
> someone could offer a little guidance to get me started I would be
> grateful. Thank you
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