[Engine-devel] RFE: SPICE and VNC graphics at the same time
Frantisek Kobzik
fkobzik at redhat.com
Wed Nov 6 12:25:30 UTC 2013
No, just two <graphics .../> framebuffers.
----- Original Message -----
From: "Omer Frenkel" <ofrenkel at redhat.com>
To: "Frantisek Kobzik" <fkobzik at redhat.com>
Cc: "engine-devel" <engine-devel at ovirt.org>
Sent: Wednesday, November 6, 2013 1:20:42 PM
Subject: Re: [Engine-devel] RFE: SPICE and VNC graphics at the same time
----- Original Message -----
> From: "Frantisek Kobzik" <fkobzik at redhat.com>
> To: "engine-devel" <engine-devel at ovirt.org>
> Sent: Wednesday, November 6, 2013 11:33:28 AM
> Subject: [Engine-devel] RFE: SPICE and VNC graphics at the same time
>
> Dear devels,
>
> I started working on a feature that allows user to run a VM with both SPICE
> and VNC graphics [1]. In the engine we derive the graphics server type
> (SPICE/VNC) from the video device (QXL/CIRRUS), which I think is wrong.
> These are two different things and should be treated separately. What I
> suggest is to split that configuration in vm_static into two fields:
> 1, (already existing) Display type with values QXL or CIRRUS
> 2, (new) Graphics types - enum or comma-separated string that indicates that
> the VM should be run with 'spice'/'vnc'/'spice,vnc'/'auto' (the last means
> that the type will be derived from the video device which is current
> behavior.
>
when choosing both, does this mean vm will have 2 video devices (cards)?
> The feature would consist of three patches:
> - vdsm - add new field in vm.conf with information about graphics types of a
> vm.
> - engine backend - add graphics types to VM and corresponding entities,
> adjust xml rpc communication.
> - engine frontend - "only" adjust the ui.
>
> The patches would be backwards compatible with older engine/vdsm versions.
>
> There are some things that must be taken into account, mostly it's about
> differences in SPICE/VNC supported features (like multimonitors, single qxl,
> smartcard, migration...). e.g. if you run a vm with both graphic types
> together the engine should probably disallow some spice features. But this
> is more of an implementation detail.
>
> Feel free to reply if you have anything to say about this feature.
>
> Cheers,
> Franta.
>
>
> [1]: https://bugzilla.redhat.com/show_bug.cgi?id=976044
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