On 06/16/2013 11:39 AM, Ivan Krutskikh wrote:
Hi
Hi Ivan,
I like spice protocol a lot and want to integrate it into Kiwi/LTSP
project in order to have hybrid terminal server/ VDI solution with
diskless client machines.
But there are some things, that I need to clear out first:
1) In order to create an LTSP screen session, I need to start spice
client (spicec or spicy) in full screen mode with security creditials,
spice adress and auto usb redirection on. I can do most of it with
spicec command line options, but it seams to lack support for usb
redirection. How can I do the same with spicy?
You better use remote-viewer as your spice client.
It accepts properties setting via the "controller" or if you prefer,
It can read properties from a configuration file (e.g.
connection_params.vv).
2) Excuse me if f.a.q, but I need to make usb devices redirection
possible for non-root users. I suppose, that should be done with udev
rule, but no expert in hardware security issues.
This can be done with changing a PolicyKit rule.
See
http://lists.freedesktop.org/archives/spice-devel/2012-February/007198.html
that point to http://hansdegoede.livejournal.com/11936.html
3) Sometime I get video artefacts from when viewing IP cameras on a
virtual machine. Example image attached. I believe, this happens due
to the video detection and mjpeg compression in spice ( h264 ip cam
--> player decoding --> raw video --> spice stream detection and mjpeg
encoding --> client video decoding --> raw video with artefacts). So
the reasonable step would be to disable video stream compression for
local network in libvirt xml file. But there are 4 parameters: image
compression, jpeg compression, zlib compression, playback compression-
I don't know which one to disable and how. Setting all to "off" and
"never" seams to resolv the issue, but leads to crappy wan performance.
The "streaming-video=off" setting of qemu-kvm command line "-spice"
option - can be used to disable video streaming.
For more information about -spice settings -- man qemu-kvm -- or man
qemu -- http://linux.die.net/man/1/qemu-kvm
and look for "-spice "
(taken from http://libvirt.org/formatdomain.html#elementsGraphics)
To disable video streaming in a libvirt xml file add
<streaming mode='never'> to <graphics .. spice>
Uri.
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