On Feb 27, 2014, at 10:19 , Markus Stockhausen <stockhausen@collogia.de> wrote:
Von: users-bounces@ovirt.org [users-bounces@ovirt.org]" im Auftrag von "Itamar Heim [iheim@redhat.com] Gesendet: Donnerstag, 27. Februar 2014 09:53 An: Sven Kieske; users@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.
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