Re: Distributed CC with QEMU?

Am 12.08.2009 um 20:48 schrieb Dan Rollo:

> Hi Lothar,
>
> Interesting idea. FWIW, I use a number of VirtualBox VMs with cc- 
> agents
> to perform builds, but I leave the VM/Agents running.
>

I do not have endless memory and keeping scheduled build running at  
distinct time
is a bit more work than simply running some qemu instances serialized  
in a script. Another solution
would be freezing unused qemu instances and keep only one continuing.  
Using a ring list of
qemu PID's to shedule probably keeps the qemu guest install simpler :-)

> I think it should be possible to do what you suggest.
> Have a look at the JMXBuildAgentUtility. This provides a way to
> programmatically stop a BuildAgent. You'd want to make sure the Agent
> stays alive long enough after a build to ensure all build results have
> been returned (so make sure KillOrRestartAfterBuildFinished=true).
>

I haven't setup that scenario yet. I need to read some about the  
JMXBuildAgentUtility :-)

> If the QEMU(or VBox ;) vm automatically starts a build agent when the
> OS/User luanches, then I think it would all work.
>

Using init scripts would help. On a Windows host there are similar  
solutions to start...

> You can probably use a CompoundBuilder to invoke the
> JMXBuildAgentUtility to kill the agent - and not even have to  
> customize
> Builders at all.
>

Maybe working on a sample setup and publish?

> If you get stuck, holler!
>
> Dan
>
> PS: I know cost is always an issue, but the time it takes a VM to load
> may or may not be faster than leaving the VM running...but that  
> tends to
> want more RAM...

Ringlist structure, but then swap may grow. I only have 3GB and use  
other VM's for CVS and Mailserver :-)
I have setup this VM's to keep resetup a bit easier, if I need to move  
between hosts.

Lothar

-- | Rapid Prototyping | XSLT Codegeneration | http://www.lollisoft.de
Lothar Behrens
Heinrich-Scheufelen-Platz 2
73252 Lenningen









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