[libvirt] Cannot enumerate physical devices with libvirt 0.7.6

Tue Feb 16 22:11:33 UTC 2010

Hi Dave and all

> have four on my test system, which I just installed.  How did you 
> install the box, install F12, then what?  Just to rule this out, did
> you rebuild the RPM?

I first built it from source (0.7.6), but, when the package was released in rawvirt (repo enabled in my system), I uninstalled my version ("make uninstall" in the directory where I installed it from), then installed that of rawvirt...
When I started having these problems, I uninstalled / reinstalled again, but it didn't change anything.

Well... you solved my problem anyway : to sort this out, I tried that again. Thus I noticed that after having uninstalled everything (yum remove + make uninstall), the "libvirtd" command still "worked" (with errors). I checked... and there was a /sbin/libvirtd, left by I-don-t-know-which install! . It was one of those last, undoubtly, since "libvirtd --version"  actually returned 0.7.6... (And, of course, in the default PATH, /sbin stands before /usr/bin/...)
I removed (=backuped just in case...) it, installed with yum, and it works at last!

Thanks for your help, you got me to the right path... And sorry for the inconvenient of a "custom" install...

However, I don't explain why this libvirtd was left there... Were the paths changed lately?

Frederic

----- "Dave Allan" <dallan at redhat.com> a écrit :

> On 02/16/2010 03:04 PM, Frédéric Grelot wrote:
> > Yep, here is what I get (see at the end) :
> >
(snip)
> >
> > I think the times when I get those lines matches with my "virsh
> nodedev-list" requests (or something like this : virt-manager tries to
> create a vm, add hardware...).
> >
> > Does this help?
> 
> That's odd, you only have two entries in the node driver array, and I
> 
> have four on my test system, which I just installed.  How did you 
> install the box, install F12, then what?  Just to rule this out, did
> you 
> rebuild the RPM?
> 
> > Frederic.
> >
> >
> > ----- "Dave Allan"<dallan at redhat.com>  a écrit :
> >
> >> On 02/16/2010 03:00 AM, Frédéric Grelot wrote:
> >>>> Daniel was referring to the libvirt udev driver--the libvirt
> code
> >> that
> >>>>
> >>>> interacts with udev--not to udev itself, which is what you're
> >> testing
> >>>>
> >>>> with udevadm.
> >>>
> >>> Ok, sorry... At least I ensured that udev itself is on...
> >>>
> >>>>    In any of your logs when you have libvirt debug logging
> >>>> turned on, do you see the message:
> >>>>
> >>>> Registering udev node device backend
> >>>
> >>> Nope, I checked in /var/log/* and libvirt.log in debug mode
> (which,
> >> after 1 1/2 day of "debug" activity enabled, is already 2Gb!)
> >>> There is no mention of udev. I think it means that the udev
> driver
> >> is not loaded in libvirt? How could enable it then? (or produce
> some
> >> message telling me why it is not) ?
> >>>
> >>>
> >>>> These messages are the result of not being able to find the
> >> device,
> >>>> which is consistent with the other things you're seeing.  These
> >> are
> >>>> all symptoms of the node device code not running.
> >>>
> >>> OK, I'll wait for your suggestions...
> >>
> >> Do you see messages like:
> >>
> >>
> >> 14:35:01.849: debug : do_open:1205 : node driver 0 Test returned
> >> DECLINED
> >> 14:35:01.849: debug : do_open:1205 : node driver 1 ESX returned
> >> DECLINED
> >> 14:35:01.849: debug : do_open:1205 : node driver 2 remote returned
> >> DECLINED
> >> 14:35:01.849: debug : do_open:1205 : node driver 3
> udevDeviceMonitor
> >> returned SUCCESS
> >>
> >> in your debug log?
> >>
> >>
> >>> Frederic.
> >>>
> >>>
> >>>>
> >>>>> Have you any other Idea?
> >>>>> Frederic.
> >>>>>
> >>>>>
> >>>>> ----- "Daniel P. Berrange"<berrange at redhat.com>    a écrit :
> >>>>>
> >>>>>> On Fri, Feb 12, 2010 at 08:05:21PM +0100, Fr?d?ric Grelot
> wrote:
> >>>>>>> Hi all,
> >>>>>>>
> >>>>>>> I often update my F12 box with the rawvirt repository, which
> >>>>>>> just
> >>>>>> installed libvirt 0.7.6. Since that, I cannot enumerate
> physical
> >>>>>> devices (and thus get a beautiful error when I start one of my
> >> vms
> >>>>>> that should use a USB device).
> >>>>>>>
> >>>>>>> I don't think I changed anything else on that box, and, of
> >>>>>>> course, I
> >>>>>> already restarted the libvirt daemon.
> >>>>>>> I haven't restarted the server itself, because it is
> currently
> >>>>>>> used,
> >>>>>> but I could do it if necessary...
> >>>>>>>
> >>>>>>> I make good use of the qemu hypervisor, and I'm looking
> forward
> >>>>>>> to
> >>>>>> solve this issue!
> >>>>>>>
> >>>>>>> Frederic.
> >>>>>>>
> >>>>>>> # libvirtd --version libvirtd (libvirt) 0.7.6
> >>>>>>>
> >>>>>>> # virsh --version 0.7.6
> >>>>>>>
> >>>>>>> # virsh nodedev-list error :Failed to count node devices
> error
> >>>>>>> :this function is not supported by the hypervisor:
> >>>>>> virNodeNumOfDevices
> >>>>>>
> >>>>>> It would appear that the udev driver failed to start - there
> are
> >>>>>> probably messages in syslog about the problem
> >>>>>>
> >>>>>>
> >>>>>> Regards, Daniel -- |: Red Hat, Engineering, London   -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 :|
> >>>>>
> >>>>> -- libvir-list mailing list libvir-list at redhat.com
> >>>>> https://www.redhat.com/mailman/listinfo/libvir-list
> >>>
> >>> --
> >>> libvir-list mailing list
> >>> libvir-list at redhat.com
> >>> https://www.redhat.com/mailman/listinfo/libvir-list
> >
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