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Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for
From: |
Anthony Liguori |
Subject: |
Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64 |
Date: |
Tue, 21 May 2013 11:42:11 -0500 |
User-agent: |
Notmuch/0.15.2+77~g661dcf8 (http://notmuchmail.org) Emacs/23.3.1 (x86_64-pc-linux-gnu) |
"Daniel P. Berrange" <address@hidden> writes:
> On Tue, May 21, 2013 at 07:55:27PM +1000, Paul Mackerras wrote:
>> On Tue, May 21, 2013 at 09:39:53AM +0100, Daniel P. Berrange wrote:
>> I think libvirt needs some more sensible way to ask qemu what its
>> capabilities are. Currently it has no way to ask qemu "what machines
>> can you emulate with kvm acceleration?" If the user has asked for a
>> KVM domain then the default machine should be one that can be provided
>> by KVM. At present it isn't, on PowerPC.
>
> If QEMU can provide more intelligent info in this respect, then
> libvirt can use it. We're doing the best we can with picking
> defaults given the info QEMU currently provides us.
Thinking about this a little more.
OpenStack pushes a lot of configuration to the nodes themselves instead
of making things dynamic and exposing APIs (think host network
configuration).
QEMU actually does allow a user to change the default machine type via
the global config file so in theory you could do this with OpenStack.
However, since libvirt uses -nouserconfig, this doesn't work in
practice.
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.
Regards,
Anthony Liguori
>
>
> Daniel
> --
> |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :|
> |: http://libvirt.org -o- http://virt-manager.org :|
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- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, (continued)
- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, Paul Mackerras, 2013/05/21
- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, Daniel P. Berrange, 2013/05/21
- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, Peter Maydell, 2013/05/21
- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, Anthony Liguori, 2013/05/21
- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, Peter Maydell, 2013/05/21
- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, Christian Borntraeger, 2013/05/21
- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64,
Anthony Liguori <=
- Re: [Qemu-devel] [libvirt] [qemu-devel] Default machine type setting for ppc64, Eric Blake, 2013/05/21
- Re: [Qemu-devel] [libvirt] [qemu-devel] Default machine type setting for ppc64, Daniel P. Berrange, 2013/05/21
- Re: [Qemu-devel] [libvirt] [qemu-devel] Default machine type setting for ppc64, Anthony Liguori, 2013/05/21
- Re: [Qemu-devel] [libvirt] [qemu-devel] Default machine type setting for ppc64, Li Zhang, 2013/05/22
- Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, Li Zhang, 2013/05/21
Re: [Qemu-devel] [qemu-devel][libvirt] Default machine type setting for ppc64, Li Zhang, 2013/05/21