[libvirt-users] Is tunnelled "managed direct" live migration actually possible?

[Daniel P. Berrange]

On Thu, May 08, 2014 at 10:29:37PM +0100, Richard W.M. Jones wrote:
> I have three servers set up as in this diagram:
> 
>   http://libvirt.org/migration.html#flowmanageddirect
> 
> My control application has separate libvirt connections to both the
> source and destination nodes.  I want to migrate entirely over those
> connections, not involving any third (peer-to-peer) connection between
> nodes (a third connection isn't possible because of firewalls and SSH
> keys).
> 
> Is this actually possible?  I've been playing with the API and reading
> docs, and it seems like "direct managed" migration is simply not
> possible :-(

IIUC, you want the migration data stream to flow from source libvirtd
to client app, then from client app to dest libvirtd ?  If so, that is
not possible. For QEMU at least, either the libvirtd daemons need to
be able to talk to each other direct with data tunnelled between them,
or the QEMU processes need to be able to talk to each other directly
(with migration controlled from client);

Regards,
Daniel
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