[Libvir] Virtual networking
Daniel P. Berrange
berrange at redhat.com
Tue Jan 23 12:19:54 UTC 2007
On Tue, Jan 23, 2007 at 10:59:31AM +0000, Mark McLoughlin wrote:
> On Mon, 2007-01-22 at 16:02 +0000, Daniel P. Berrange wrote:
> > On Mon, Jan 22, 2007 at 02:46:11PM +0000, Mark McLoughlin wrote:
>
> > > http://www.gnome.org/~markmc/code/libvirt-networking/libvirt-qemu-transient.patch
> >
> > That should not be neccessary in my latest patches - I fixed up the transient
> > domain cleanup stuff in a slightly different way.
>
> AFAICS, this is still needed ... i.e.
>
> $> virsh create foo.xml
> $> virsh destroy Foo
> $> virsh create foo.xml
> libvir: QEMUD error : domain Foo exists already
> error: Failed to create domain from foo.xml
I think one of your other patches must be breaking this, because the plain
QEMU patches I posted definitely work:
virsh > create /home/berrange/q.xml
Domain demo created from /home/berrange/q.xml
virsh > list --all
Id Name State
----------------------------------
3 demo running
virsh > destroy demo
Domain demo destroyed
virsh > list --all
Id Name State
----------------------------------
virsh > create /home/berrange/q.xml
Domain demo created from /home/berrange/q.xml
virsh > list --all
Id Name State
----------------------------------
4 demo running
The bit of code which cleans up transient domains is at the very end of the
method:
static int qemudDispatchPoll(struct qemud_server *server, struct pollfd *fds)
in qemud/qemud.c
It basically iterates over every guest in the inactive domains list, and any
which do not have a config file listed (ie, vm->configFile[0] == NULL) are
purged from the list. The backend impl for 'create' command ensures this
is the case by passing 0 as the last arg to qemudLoadConfigXML() which tells
it not to write a persistent config file to disk.
Regards,
Dan.
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