libvirt users - Feb 2012 - Unable to connect qemu:///system on Fedora16 X86_64

Dear all:
    I ust installed Fedora16Fedora16 X86_64 on my new machine, and then I
ran the commands as follows(ran as root):

yum install qemu-kvm
yum install qemu
yum install libvirt
yum install virt-manager

   then I started the libvirtd as follow:
/etc/init.d/lbvirtd start

So , it ran well.


However, after a few days , when I ran the command "virt-manager" , it
showed as bellow:



it seemed that ti cannot connect the hipervisor.


Then I did a little test:
I ran the conmand "virsh list" , but it didnot work,either.

Then I used Python as follows:
import libvirt
cc = libvirt.open(r'qemu:///system')

but it didnot work,either.


All the test above are under root . I hope that someone can give me some
suggestiion. Thanks to all!


Suyi Wang
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On 02/28/2012 10:23 AM, suyi wang wrote:
> Dear all:
>     I ust installed Fedora16Fedora16 X86_64 on my new machine, and then I
> ran the commands as follows(ran as root):
> 
> yum install qemu-kvm
> yum install qemu
> yum install libvirt
> yum install virt-manager
> 
>    then I started the libvirtd as follow:
> /etc/init.d/lbvirtd start
> 
> So , it ran well.
> 
> 
> However, after a few days , when I ran the command "virt-manager"
, it
> showed as bellow:
> 
> 
> 
> it seemed that ti cannot connect the hipervisor.
This list is plain-text only.  Your embedded graphic (at least, I'm
assuming you attempted to embed a graphic) got eaten by the list server,
so we don't know what message you got.  Can you paste the actual error
message you got?

Meanwhile, we have a wiki page for diagnosing common problems.  Perhaps
your issue is covered by one of the items there; and if not, it would
help if you could add a new page with the steps you take in resolving
the issue.  http://wiki.libvirt.org/page/Troubleshooting
> 
> 
> Then I did a little test:
> I ran the conmand "virsh list" , but it didnot work,either.
Again, knowing the exact output of 'virsh -c qemu:///system list',
rather than just saying it didn't work, will help others in diagnosing
your issue.

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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---------- ????? ----------
???? suyi wang <wangsuyi640 at gmail.com>
??? 2012?2?29? ??10:57
??? Re: [libvirt-users] Unable to connect qemu:///system on Fedora16 X86_64
???? Eric Blake <eblake at redhat.com>


So, thanks a lot . Eric.
I attached the figure?which showed when I ran the command
"virt-manager".

I also tested the commad as follows, sa you can see my output.
[root at localhost ~]# virt-manager --debug
2012-02-29 10:56:13,555 (cli:71): virt-manager startup
2012-02-29 10:56:13,555 (virt-manager:292): Launched as:
/usr/share/virt-manager/virt-manager.py --debug
2012-02-29 10:56:13,555 (virt-manager:293): GTK version: (2, 24, 7)
2012-02-29 10:56:13,555 (virt-manager:294): virtManager import: <module
'virtManager' from
'/usr/share/virt-manager/virtManager/__init__.pyc'>
2012-02-29 10:56:13,671 (engine:555): No inspection thread because
libguestfs is too old, not available, or libvirt is not thread safe.
2012-02-29 10:56:13,674 (engine:346): About to connect to uris
['qemu:///system']
2012-02-29 10:56:13,720 (engine:471): window counter incremented to 1
2012-02-29 10:56:13,726 (connection:954): Scheduling background open thread
for qemu:///system
2012-02-29 10:56:13,727 (connection:1140): Background 'open connection'
thread is running


Thanks!
Suyi Wang


2012/2/29 Eric Blake <eblake at redhat.com>
> On 02/28/2012 10:23 AM, suyi wang wrote:
> > Dear all:
> >     I ust installed Fedora16Fedora16 X86_64 on my new machine, and
then I
> > ran the commands as follows(ran as root):
> >
> > yum install qemu-kvm
> > yum install qemu
> > yum install libvirt
> > yum install virt-manager
> >
> >    then I started the libvirtd as follow:
> > /etc/init.d/lbvirtd start
> >
> > So , it ran well.
> >
> >
> > However, after a few days , when I ran the command
"virt-manager" , it
> > showed as bellow:
> >
> >
> >
> > it seemed that ti cannot connect the hipervisor.
>
> This list is plain-text only.  Your embedded graphic (at least, I'm
> assuming you attempted to embed a graphic) got eaten by the list server,
> so we don't know what message you got.  Can you paste the actual error
> message you got?
>
> Meanwhile, we have a wiki page for diagnosing common problems.  Perhaps
> your issue is covered by one of the items there; and if not, it would
> help if you could add a new page with the steps you take in resolving
> the issue.  http://wiki.libvirt.org/page/Troubleshooting
>
> >
> >
> > Then I did a little test:
> > I ran the conmand "virsh list" , but it didnot work,either.
>
> Again, knowing the exact output of 'virsh -c qemu:///system list',
> rather than just saying it didn't work, will help others in diagnosing
> your issue.
>
> --
> Eric Blake   eblake at redhat.com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>
>
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