On Thu, May 15, 2008 at 09:10:31AM +0200, Gerd Hoffmann wrote:
David Abrahams wrote:
I normally launch my kvm VM from the command line with "-redir tcp:3389:3389" but have been unable to find a way to set up virt-manager to launch it the same way. Ditto for other qemu options such as "-soundhw all". Is there a way?
Not directly in the config. Usual trick is to create a wrapper script like this (for a serial console in that case) ...
[root@xeni f8-32]# cat /root/bin/qemu-serial #!/bin/sh exec /usr/bin/qemu-kvm "$@" -serial telnet::9999,server,nowait,nodelay
... then edit the xml config to make the <emulator> tag point to the wrapper script instead of /usr/bin/qemu-kvm.
Hmm, maybe the emulator tag should get a args attribute, so one can do that kind of stuff without wrapper scripts, like this:
<domain type='kvm'> [ ... ] <devices> <emulator args="-redir ...">/usr/bin/qemu-kvm</emulator> [ ... ]
The usual ones should be supported by libvirt directly of course. Serial console is in cvs meanwhile, I've seen also sound support patches. But for unusual configurations and debugging purposes it would be quite handy to have the additional args directly in the config and not hidden somewhere in a separate script ...
We explicitly do not support passing arbitrary arguments to QEMU. The libvirt XML format has to be portable & have clearly defined semantics. Adding QEMU specifics args clearly violates that requirement. Furthermore we cannot guarentee the behaviour of QEMU when adding extra arguments, since one arg may change / override the behaviour of another. We've hit this problem in the past with -nographics overriding the monitor device setup & thus breaking our control of QEMU. There's similar issues with the various ways to specify disks overriding each other While you are free to define a wrapper around QEMU to pass extra args, be aware that this is completely unsupportable & we can make no guarentees that your wrapper will continue to run with the same semantics in future libvirt releases. Regards, Dan. -- |: Red Hat, Engineering, Boston -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|