Re: [LARTC] tc+mrtg

[Alessandro Ren <alessandro.ren@opservices.com.br>]

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    A good tool that I use to graoh things is netmrg, www.netmrg.net

    []s.

Rene Gallati wrote:

> Gideon le Grange wrote:
>
>> On Mon, 2004-07-19 at 14:20, Roy wrote:
>>
>>> MRTG can only show interface load, basicaly it is the graphic 
>>> representation
>>> of what you will see with ifconfig.
>>>
>>> For more advanced graph you need to use another software than mrtg.
>>
>>
>>
>> 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).
>
>
> MRTG doesn't necessarily need SNMP, you can feed it ANY value via a 
> perl script. I've been doing it for ages. You just need to get at the 
> values (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 
> 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 
> target.
>
> Line 4
>     string, telling the name of the target.
>
> Depending on the type of data your script returns you might want to 
> use 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 
> you must escape it with a backslash ...
>
> If your script does not have any data to return but does not want mrtg 
> to complain about invalid data, it can return 'UNKNOWN' instead of a 
> number. Note though that only rrdtool is realy equipped to handle 
> unknown data well.
> "
>
>

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Alessandro Ren

	

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