On Wed, Feb 21, 2007 at 12:07:42PM +0900, Saori Fukuta wrote:
> Hi,
>
> I try to install with virt-install and sometimes vncviewer get an error
> message that says "unable to connect to host:Connection refused(111)".
> So, I cannot continue installation.
>
> The attached patch to resolve this issues in the following way:
>
> 1) Check whether the domain has VNCport number.
> 2) If the number is exist, use the VNCport number.
> 3) If not, check again every 0.25 second up to 40 seconds.
This is no good because it is Xen specific - the code breaks when used
with the QEMU / KVM backend to libvirt. I think this is actually a
combination of two bugs:
- libvirt looks in xenstore to find the port number, but if it is
missing hardcodes 5900 + domid. So there is a race condition where
if virt-install asks for the XML dump, before the framebuffer daemon
has started up, it will get the wrong port number.
This is a hardcoded fallback port number is a hangover from old Xen
3.0.2 where the port number was fixed & not kept in xenstore at all.
We need to fix libvirt to only use this code on Xen <= 3.0.3
- Once the above fix in libvirt is done, we can make virt-install do
a loop like the one you have below, but instead of looking in xenstore
it will look at the port in the XML - waiting for it to change from '-1'
to an actual port number
Regards
Dan.
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