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Re: [Qemu-devel] [libvirt] [qemu-devel] Default machine type setting for

From: Eric Blake
Subject: Re: [Qemu-devel] [libvirt] [qemu-devel] Default machine type setting for ppc64
Date: Tue, 21 May 2013 11:12:26 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6

On 05/21/2013 10:42 AM, Anthony Liguori wrote:
> Perhaps the right thing to do for OpenStack is to allow for a user
> specified configuration file to select things like the default hardware
> models/machine types?  Then this could become node configuration instead
> of dynamic configuration.
> I think it could be useful for general users too.  Every domain requires
> a lot of the same boiler plate bits.  I think a lot of configurations
> would benefit from being able to set global domain options.

I have also argued in the past that it would be useful for libvirt to
support the idea of a template, where you can specify a domain XML that
inherits defaults from the template.  We've already done things like
this for networking, nwfilter, and even secret management (in domain
XML, you declare that you are using a named network object, and that
network object serves as the template instead of you having to hard-code
all the elements into your domain XML), so we have a design to base it
on.  But until someone adds such a feature for libvirt, then OpenStack
should be passing explicit XML to libvirt, and tracking defaults at the
OpenStack layer.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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