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Re: [virt-tools-list] [PATCH 1/4] Add inspection thread.



On Thu, Jul 07, 2011 at 10:37:16AM -0400, Cole Robinson wrote:
> > --- a/src/virtManager/manager.py
> > +++ b/src/virtManager/manager.py
> > @@ -685,6 +685,9 @@ class vmmManager(vmmGObjectUI):
> >  
> >          self._append_vm(model, vm, connection)
> >  
> > +        if self.engine.inspection_thread:
> > +            self.engine.inspection_thread.vm_added(connection, vmuuid)
> > +
> 
> This method isn't really sufficient, since it won't track VM removal. I
> think the easiest thing to do is just track connections, and for each
> run of the inspection thread, iterate over all VMs of each open connection.
> 
> In engine.py when you create the inspection thread, do something like
> 
> self.connect("connection-added", self.inspection_thread.conn_added)
> self.connect("connection-removed", self.inspection_thread.conn_removed)
> 
> Then use those callbacks to just build up a list of currently known
> URIs. That will also allow you to do the conn.is_remote() check once for
> each connection.
> 
> Then when the inspection thread runs, get the VM list with:
> 
> for uuid in conn.list_vm_uuids():
>     self._process(conn.get_vm(uuid))

Thinking about this a bit more, I think the inspection thread needs to
do both.  It needs to track connections as you say above.  But once it
has processed all VMs it can find, it needs to then sleep until a
vm_added event happens, since it should wake up, find that VM, process
it, and go back to sleep.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v


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