Fedora xen - Jul 2007 - Unable to open connection to hypervisor ''qemu:///system''

virt-manager +kvm wont load up since the last rounds of F7 updates I think.

Unable to open connection to hypervisor URI ''qemu:///system'':
<class ''libvirt.libvirtError''> virConnectOpenReadOnly()
failed No such file
or directory
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 68, in
_connect_to_uri
    conn = self.get_connection(uri, readOnly)
  File "/usr/share/virt-manager/virtManager/engine.py", line 309, in
get_connection
    conn = vmmConnection(self.get_config(), uri, readOnly)
  File "/usr/share/virt-manager/virtManager/connection.py", line 74,
in
__init__
    self.vmm = libvirt.openReadOnly(openURI)
  File "/usr/lib64/python2.5/site-packages/libvirt.py", line 132, in
openReadOnly
    if ret is None:raise libvirtError(''virConnectOpenReadOnly()
failed'')
libvirtError: virConnectOpenReadOnly() failed No such file or directory


[root@echelon ~]# lsmod |grep kvm
kvm_amd                25813  1
kvm                    75969  1 kvm_amd


This works:

[root@echelon kvm]# /usr/bin/qemu-kvm fedora7_1


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On Sat, Jul 14, 2007 at 05:31:38AM -0500, Justin Conover
wrote:
> virt-manager +kvm wont load up since the last rounds of F7 updates I think.
> 
> Unable to open connection to hypervisor URI
''qemu:///system'':
> <class ''libvirt.libvirtError''>
virConnectOpenReadOnly() failed No such file
> or directory
> Traceback (most recent call last):
>  File "/usr/share/virt-manager/virtManager/engine.py", line 68,
in
> _connect_to_uri
>    conn = self.get_connection(uri, readOnly)
>  File "/usr/share/virt-manager/virtManager/engine.py", line 309,
in
> get_connection
>    conn = vmmConnection(self.get_config(), uri, readOnly)
>  File "/usr/share/virt-manager/virtManager/connection.py", line
74, in
> __init__
>    self.vmm = libvirt.openReadOnly(openURI)
>  File "/usr/lib64/python2.5/site-packages/libvirt.py", line 132,
in
> openReadOnly
>    if ret is None:raise libvirtError(''virConnectOpenReadOnly()
failed'')
> libvirtError: virConnectOpenReadOnly() failed No such file or directory
> 
  If you updated libvirt (from 0.2.3 to 0.3.0), make sure you don''t
have a libvirt_qemud running, if yes kill it and restart the libvirtd
service, then you should have a libvirtd daemon running instead.
This may or may not be the cause, hard to tell...

Daniel

-- 
Red Hat Virtualization group http://redhat.com/virtualization/
Daniel Veillard      | virtualization library  http://libvirt.org/
veillard@redhat.com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine  http://rpmfind.net/

On 7/14/07, Daniel Veillard <veillard@redhat.com>
wrote:
>
> On Sat, Jul 14, 2007 at 05:31:38AM -0500, Justin Conover wrote:
> > virt-manager +kvm wont load up since the last rounds of F7 updates I
> think.
> >
> > Unable to open connection to hypervisor URI
''qemu:///system'':
> > <class ''libvirt.libvirtError''>
virConnectOpenReadOnly() failed No such
> file
> > or directory
> > Traceback (most recent call last):
> >  File "/usr/share/virt-manager/virtManager/engine.py", line
68, in
> > _connect_to_uri
> >    conn = self.get_connection(uri, readOnly)
> >  File "/usr/share/virt-manager/virtManager/engine.py", line
309, in
> > get_connection
> >    conn = vmmConnection(self.get_config(), uri, readOnly)
> >  File "/usr/share/virt-manager/virtManager/connection.py",
line 74, in
> > __init__
> >    self.vmm = libvirt.openReadOnly(openURI)
> >  File "/usr/lib64/python2.5/site-packages/libvirt.py", line
132, in
> > openReadOnly
> >    if ret is None:raise
libvirtError(''virConnectOpenReadOnly() failed'')
> > libvirtError: virConnectOpenReadOnly() failed No such file or
directory
> >
>
>   If you updated libvirt (from 0.2.3 to 0.3.0), make sure you
don''t
> have a libvirt_qemud running, if yes kill it and restart the libvirtd
> service, then you should have a libvirtd daemon running instead.
> This may or may not be the cause, hard to tell...
>
> Daniel
>
> --
> Red Hat Virtualization group http://redhat.com/virtualization/
> Daniel Veillard      | virtualization library  http://libvirt.org/
> veillard@redhat.com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
> http://veillard.com/ | Rpmfind RPM search engine  http://rpmfind.net/
>
> --
> Fedora-xen mailing list
> Fedora-xen@redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-xen


I don''t know how or why but the other day  I noticed from another error
after downgrading libvirt that the package qemu was missing..... so I
installed that, it worked. upgraded to the latest libvirt and libvirt-python
and they work.

Thanks,