Open Stack

On Fri, Oct 30, 2020 at 12:23 PM Stephen Finucane <stephenfin at redhat.com>
wrote:

> On Fri, 2020-10-30 at 11:56 -0500, vladimir franciz blando wrote:
>
> Hi,
>
> I edited the  libvirt xml (virsh edit...) file of a running Windows server
> instance because I changed the video model type from cirrus to vmvga so it
> can support a higher resolution on a console (cirrus supports up to 1280
> only).
> After editing, i "soft-rebooted" the instance and the new configuration
> sticks.  That's awesome.
>
>
> Please don't do this :) You shouldn't change things about an instance
> behind nova's back. It breaks resource tracking and can cause all sorts of
> horribleness.
>

It is my last resort as the running Windows VM is already in production and
they don't want to rebuild.


>
> But when you do a "hard-reboot" it will revert back to the original config.
>
>
> Hard reboot builds configuration from scratch, dumping the existing XML.
> This is built from the same things used when you first create the instance
> (flavor + extra specs, image + metadata, host-level config, ...).
>
> What you want is the 'hw_video_model' image metadata property. Set this
> and rebuild your instance:
>
> openstack image set --property hw_video_model=vmvga $IMAGE
> openstack server rebuild $SERVER $IMAGE
>

This is already done before I was doing it on running instances, so any new
Windows VM will have it.


>
> Note that rebuild is a destructive operation so be sure you're aware of
> what this is doing before you do it.
>
> Stephen
>
> I also tried to do a "shut-down" then "start" again, but it still reads
> the original config.  Not sure where it  is reading the config from...
>
> Regards
> Vlad
>
>
>
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