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Re: [libvirt] [FeatureRequest/RFC] non-volitile domain defines



Daniel P. Berrange schreef:
On Wed, Jul 23, 2008 at 12:43:25PM +0200, Stefan de Konink wrote:
Daniel P. Berrange schreef:
On Wed, Jul 23, 2008 at 11:54:11AM +0200, Stefan de Konink wrote:
DP: Would a patch be accepted that makes this configurable for *all*
implementations? So that by after configuration a file is saved, and is
queried after the platform specific implementation doesn't list the domain as defined?

List Defined domains:
- Query current implementation
- If defined merge all non available domains.

In principle what I want to see is that if a domain is not defined in the specific hypervisor, the domain file can be queried. I know I can implement this behavior in my own code, but I really thing this would be a cool thing for more people.
This doesn't make any sense. We have APIs for listing & defining inactive domains. The individual drivers implement these APIs according to the
required API contract, and the underlying impl is not something which any
application using libvirt need know or care about. If your application is
relying on the inactive domains being stored in files it is broken.
Or you could say that libvirt is broken because it isn't able to distribute the inactive domains across the network in a consistent way.

No, because that is not libvirt's job. The goal of libvirt is to provide
an API for managing virtualization capabilities on a host. Data center or
network management is an application level problem, out of scope for libvirt.

That calls for a libvirt-fork that does implement what is needed to consistently providing a replicated pool of domains; call it libvirt-datacenter-edition. I think it is the biggest non sense for implementing shortcommings/management in kvm/qemu, but don't provide these to the other hypervisors 'just because they implement it theirselves locally'.

It is non-trivial to provide a 'xenstored' for the complete network, while it is relatively easy to put an NFS dir on the libvirt xml configs.


Stefan


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