Re: [KVM-AUTOTEST] [PATCH] support for remote migration

[Uri Lublin <uril@redhat.com>]

sudhir kumar wrote:
> Michael,
> any updates on this patch? Are you going to commit this or you have
> any other plans/patch ?
> 

I'm not sure having the inter-host migration is best implemented on the 
autotest-client side. Actually this is one of the few tests I think belong to 
the autotest-server side.

On the other hand it is pretty simple to implement it here. So I think we'd 
better try first implementing it as a server test, and apply it to the client 
side only as a second choice.

A few (minor) problems with it running on the client side:
1. We do not know what the other host is running (what version?, kvm-modules 
loaded? etc.)
2. There may be a conflict between a running local guest running on the remote 
(if it allowed to run tests while being a migration destination), and the remote 
guest.
3. There may be a conflict between two remote guests running a migration test on 
two different hosts.
3. get_free_ports run on the local machine, but expected/assumed to be free on 
the remote machine too.
4. For a migration to be successful, the image(s) must be shared by both hosts. 
On the other hand, when installing a guest OS (e.g. Fedora 8) on both hosts 
(let's assume they both are running fc8_quick) we want different images on 
different hosts.

These are all can be solved easily by non-trivial pretty simple configuration on 
the server. One can configure the "remote" migration to run as a separate tests 
to all other tests.


Regards,
     Uri.