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Re: [Libvir] Request for additional entry points



On Thu, 2006-04-13 at 12:00 -0400, libvir-list-request redhat com wrote:


> We've discussed this before and I think the most compelling argument for 
> passive domain support in libvirt (and even at a lower level such as 
> Xend) is the following scenario:
> 
> Let's say a user creates a virtual FC6 virtual machine that she is going 
> to use to test her apps under Gnome (she's a KDE user).  The machine 
> isn't always there b/c she rarely needs it.  She created it with some 
> nifty KDE tool that has yet to be written.
> 
> Of course, she finds out about this neat applet that you can use to 
> managing running domains.  If there isn't a common way of accessing 
> passive domains then she won't see the FC6 VM.
> 
> Now, I don't think that *all* domains should have to have passive 
> equivalents (which is a requirement in the CIM provider today) because 
> of some of the scenarios you outlined.  However, I think not attempting 
> to have a common API for passive domains is going to creative a mess as 
> we get a larger number of management tools.

I think we're confusing the notion of what a passive domain is with what
config files happen to be sitting on / exposed to the dom0 machine.  I
could very easily look at having an rdbms store the info about the
passive domain, hand that down to the dom0 via rpc, and directly call
the createLinux call.  To me, that's still a passive domain, even though
it's configs haven't touched disk yet.

I guess I'm also struggling to understand why you'd toss this into
xenstore... it just seems this is a higher level concept that needs to
be tracked in too specific a way by management systems.

--Bret



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