Re: [Users] concurrent SPICE access [was: Re: oVirt 3.5 planning]
On Feb 27, 2014, at 10:19 , Markus Stockhausen <stockhausen(a)collogia.de> wrote:
> Von: users-bounces(a)ovirt.org [users-bounces(a)ovirt.org]&quot;
im Auftrag von "Itamar Heim [iheim(a)redhat.com]
> Gesendet: Donnerstag, 27. Februar 2014 09:53
> An: Sven Kieske; users(a)ovirt.org
> Betreff: Re: [Users] concurrent SPICE access [was: Re: oVirt 3.5 planning]
>
> On 02/27/2014 10:52 AM, Itamar Heim wrote:
>> On 02/27/2014 10:51 AM, Sven Kieske wrote:
>>> Well, you generate a separate ticket to the same vm.
>>> resulting in another vnc-session to the server, but the input/output
>>> is shared, you can see in real time when the other user types etc.
>>
>> iirc, the ticketing mechanism works in a way that a new ticket
>> disconnects the previous session?
>
> (on connection with the new ticket)
In the VNC case this does not work. I do not know if its by design or
just a bug/feature. Either Ovirt does not instruct libvirt to create a new
VNC ticket with option "disconnect all connected clients" or this
information is not correctly interpreted by qemu.
well, sort of both. We keep the QEMU/libvirt default which is to honor client's
request.
Which is in case of novnc by default "shared", other common clients like
vncviewer default to "disconnect"
I wonder if anyone is using the shared behavior or we should disallow it. Or make it
optional, which is nice but as always comes with a price of development time.
If you launch a client that initiates a shared connection to the console
then existing connections will stay open. This magically works if you
use the novnc client (as Sven explained).
The only thing that prevents a concurrent access to the console with
virt-viewer is the fact that it enforces a single VNC connection.
yes
So state is as follows:
SPICE: disconnect happens during ticket creation
It's on connection as well, it just can't be controlled (not that it matters:)
Thanks,
michal
VNC: disconnect may happen during client connection
You can check that behaviour if you associate a .VV file with a text editor.
With SPICE the existing console connection is terminated just before the
.VV file opens in the editor. With VNC the existing session stays open.
Markus<InterScan_Disclaimer.txt>_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users