From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rene Gallati <lartc@draxinusom.ch>
Date: Mon, 19 Jul 2004 13:47:38 +0000
Subject: Re: [LARTC] tc+mrtg
Message-Id: <40FBD0FA.7060100@draxinusom.ch>
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To: lartc@vger.kernel.org

Gideon le Grange wrote:

> On Mon, 2004-07-19 at 14:20, Roy wrote:
>=20
>>MRTG can only show interface load, basicaly it is the graphic representat=
ion
>> of what you will see with ifconfig.
>>
>>For more advanced graph you need to use another software than mrtg.
>=20
>=20
> MRTG can graph any variable that you can read using SNMP. The problem is
> getting the tc stats readable using SNMP, that's the trick bit (which as
> far as I've seen can't be done, but I hope I'm wrong).=20
>=20

MRTG doesn't necessarily need SNMP, you can feed it ANY value via a perl=20
script. I've been doing it for ages. You just need to get at the values=20
(peridoic tc -s qdisc show, parse it, feed mrtg)

 From : http://people.ee.ethz.ch/~oetiker/webtools/mrtg/mrtg-reference.html

"External Monitoring Scripts
     If you want to monitor something which does not provide data via=20
snmp you can use some external program to do the data gathering.

     The external command must return 4 lines of output:

Line 1
     current state of the first variable, normally 'incoming bytes count'

Line 2
     current state of the second variable, normally 'outgoing bytes count'

Line 3
     string (in any human readable format), telling the uptime of the=20
target.

Line 4
     string, telling the name of the target.

Depending on the type of data your script returns you might want to use=20
the 'gauge' or 'absolute' arguments for the Options keyword.

Example:

  Target[ezwf]: `/usr/local/bin/df2mrtg /dev/dsk/c0t2d0s0`

Note the use of the backticks (`), not apostrophes (') around the command.

If you want to use a backtick in the command name this can be done but=20
you must escape it with a backslash ...

If your script does not have any data to return but does not want mrtg=20
to complain about invalid data, it can return 'UNKNOWN' instead of a=20
number. Note though that only rrdtool is realy equipped to handle=20
unknown data well.
"


--=20

C U

      - -- ---- ----- -----/\/  Ren=E9 Gallati  \/\---- ----- --- -- -
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