Anouncement: ipvsman/d more than a GUI to IPVS

[Dr. Volker Jaenisch]

Hello Manuel!

Manuel Arostegui Ramirez schrieb:
El Sábado, 28 de Abril de 2007 22:50, Dr. Volker Jaenisch escribió:

> I've already written an small module taking advantaje of ipvsadm output in 
> order to know if any of the realserver went down, when went down I wanna mean 
> one of the services the Real Server is supposed to serve, If so, and alert 
> will be fired. 
> I've also written some modules to get information about incoming packets/bytes 
> to each node.
> This is simply, I know, but keep in mind this is a spefic solution a client 
> wanted us to do. So first off, I did what they want, and now, we're using 
> that to improve PandoraFMS and build some more generalistic modules to work 
> with LVS solutions :-)
ipvsman/d does nothing magically or much more sophisticated as your straight forward aproach.
ipvsman also gets the information by calling ipvsadm and parsing the output.

> But as i stated earlier ipvsmand has more (meta) information than that.
> >/ It should be possible to write an interface (text-dump in file,/
> >/ tcp-status-port, xml-rpc, ..) to retrieve/
> >/ status information from the ipvsmand. You will know best what type of/
> >/ interface you like the most for application in pandora/
> >/ - just tell me./
>
> Really? If it possible to get a dump file of all the data showed in ipvsmand? 
> (I'm sorry I didn't go deep into ipvsmand, there's such a good weather in 
> Madrid and I went out ;-)  )
> Having a dump file with all the data in plain text would be wonderful, cause 
> to write a module to parse all that data and send it to the PandoraFMS server 
> would be so easy and that's _exactly_ what we need.

There is one crucial point to mention. It is necessary, that ipvsman/d 
is used and not ldirectord nor keepalived for livekeeping.
ipvsman can be used in parallel with ldirectord or keepalived. But 
ipvsman/d requires meta data (e.g. the topology)
of the cluster. without this metadata it is nothing more than a parser 
to ipvsadm and therefore not of great use to you.
Taking it the other way around a user with ipvsman AND an other 
livechecker has to maintain two configurations for one task. This you 
will agree seems not to be a good solution from the user perspective.

If your customer uses keepalived i recomend that you ask the people from 
keepalived to build an interface with pandora. :-)

If you have a customer using exclusively ipvsmand for livechecking than 
an interface between ipvsmand and pandora seems to be a fruitfull 
solution. You must decide if this limitation is ok for you?

Best regards

Volker



-- 
====================================================
   inqbus it-consulting      +49 ( 341 )  5643800
   Dr.  Volker Jaenisch      http://www.inqbus.de
   Herloßsohnstr.    12      0 4 1 5 5    Leipzig
   N  O  T -  F Ä L L E      +49 ( 170 )  3113748
====================================================