Fedora xen - Nov 2006 - virt-manager make check errors and connection errors

I''m using virt-manager-0.2.5 on a Debian system.  I installed these 
packages per the prerequisites using aptitude:
aptitude install python-gtk2 python-gtk2-dev python-gnome2 
python-gnome2-dev python-dbus  python-vte python-glade2 python-urlgrabber

I installed libvirt from the cvs sources and I aliened and installed 
python-virtinst-0.96.0-1.noarch.rpm.

''make check'' for virt-manager complained about some rhpl
exceptions, so
I commented out these lines.

src/virtManager/create.py
- from rhpl.exception import installExceptionHandler
- from rhpl.translate import _, N_, textdomain, utf8

the ''make check'' didn''t seem to complain
afterwards...but this could be
where I screwed things up :)

So I do a ''make install'' and try running it and try to connect
to the
local Xen host and get:
  Unable to open a connection to the Xen hypervisor/daemon.

  Verify that:
   - A Xen host kernel was booted
   - The Xen service has been started

I have verified that I''m booted in Xen and that xend has been started. 

here''s my log:
blade06:~:) cat .virt-manager/virt-manager.log
Thu, 09 Nov 2006 16:42:16 WARNING  No support for gnome-keyring
Thu, 09 Nov 2006 16:42:16 WARNING  Could not connection to session bus, 
disabling DBus service exceptions.RuntimeError DBus session/starter bus 
address not defined
Thu, 09 Nov 2006 16:42:34 ERROR    Unable to open connection to 
hypervisor URI ''xen'': libvirt.libvirtError
virConnectOpenReadOnly()
failed no support for hypervisor

can someone point out the err in my ways?
-dan

On Thu, Nov 09, 2006 at 04:39:27PM -0500, Dan B. Phung
wrote:
> I''m using virt-manager-0.2.5 on a Debian system.  I installed
these
> packages per the prerequisites using aptitude:
> aptitude install python-gtk2 python-gtk2-dev python-gnome2 
> python-gnome2-dev python-dbus  python-vte python-glade2 python-urlgrabber
> 
> I installed libvirt from the cvs sources and I aliened and installed 
> python-virtinst-0.96.0-1.noarch.rpm.
> 
> ''make check'' for virt-manager complained about some rhpl
exceptions, so
> I commented out these lines.
> 
> src/virtManager/create.py
> - from rhpl.exception import installExceptionHandler
> - from rhpl.translate import _, N_, textdomain, utf8
I''ve no idea how this got into the python code - those imports are some
Red Hat specific python helper modules, which I was explicitly trying to
avoid in virt-manager. I''m about to put up a 0.2.6 release which will
remove this crack rock :-)  Removing them was a safe thing to do.
> So I do a ''make install'' and try running it and try to
connect to the
> local Xen host and get:
>  Unable to open a connection to the Xen hypervisor/daemon.
> 
>  Verify that:
>   - A Xen host kernel was booted
>   - The Xen service has been started
> 
> I have verified that I''m booted in Xen and that xend has been
started.
> 
> here''s my log:
> blade06:~:) cat .virt-manager/virt-manager.log
> Thu, 09 Nov 2006 16:42:16 WARNING  No support for gnome-keyring
> Thu, 09 Nov 2006 16:42:16 WARNING  Could not connection to session bus, 
> disabling DBus service exceptions.RuntimeError DBus session/starter bus 
> address not defined
> Thu, 09 Nov 2006 16:42:34 ERROR    Unable to open connection to 
> hypervisor URI ''xen'': libvirt.libvirtError
virConnectOpenReadOnly()
> failed no support for hypervisor
Check the /etc/xen/xend-config.sxp file. Is it configured to have either
of these settings set to yes:

(xend-http-server yes)
(xend-unix-server yes)

I strongly recommend setting unix to yes & http to no nbecause http
server has *zero* authentication :-(

Once you''ve done this, also make sure that
$prefix/libexec/libvirt_proxy
is made setuid root - this allows virt-manager to run as an unprivileged
user in read-only mode. You still need to run virt-manager as root if 
you want to do read-write operations.

Regards,
Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=|

awesome, it works!  kinda....as root it can list the vms, but as a 
regular user it repeats this message:

  libvir: error : operation failed: xenProxyListDomains

which files does virt-manager require suid perms? 

thanks,
dan



Daniel P. Berrange wrote:
> On Thu, Nov 09, 2006 at 04:39:27PM -0500, Dan B. Phung wrote:
>   
>> I''m using virt-manager-0.2.5 on a Debian system.  I installed
these
>> packages per the prerequisites using aptitude:
>> aptitude install python-gtk2 python-gtk2-dev python-gnome2 
>> python-gnome2-dev python-dbus  python-vte python-glade2
python-urlgrabber
>>
>> I installed libvirt from the cvs sources and I aliened and installed 
>> python-virtinst-0.96.0-1.noarch.rpm.
>>
>> ''make check'' for virt-manager complained about some
rhpl exceptions, so
>> I commented out these lines.
>>
>> src/virtManager/create.py
>> - from rhpl.exception import installExceptionHandler
>> - from rhpl.translate import _, N_, textdomain, utf8
>>     
>
> I''ve no idea how this got into the python code - those imports are
some
> Red Hat specific python helper modules, which I was explicitly trying to
> avoid in virt-manager. I''m about to put up a 0.2.6 release which
will
> remove this crack rock :-)  Removing them was a safe thing to do.
>
>   
>> So I do a ''make install'' and try running it and try
to connect to the
>> local Xen host and get:
>>  Unable to open a connection to the Xen hypervisor/daemon.
>>
>>  Verify that:
>>   - A Xen host kernel was booted
>>   - The Xen service has been started
>>
>> I have verified that I''m booted in Xen and that xend has been
started.
>>
>> here''s my log:
>> blade06:~:) cat .virt-manager/virt-manager.log
>> Thu, 09 Nov 2006 16:42:16 WARNING  No support for gnome-keyring
>> Thu, 09 Nov 2006 16:42:16 WARNING  Could not connection to session bus,
>> disabling DBus service exceptions.RuntimeError DBus session/starter bus
>> address not defined
>> Thu, 09 Nov 2006 16:42:34 ERROR    Unable to open connection to 
>> hypervisor URI ''xen'': libvirt.libvirtError
virConnectOpenReadOnly()
>> failed no support for hypervisor
>>     
>
> Check the /etc/xen/xend-config.sxp file. Is it configured to have either
> of these settings set to yes:
>
> (xend-http-server yes)
> (xend-unix-server yes)
>
> I strongly recommend setting unix to yes & http to no nbecause http
> server has *zero* authentication :-(
>
> Once you''ve done this, also make sure that
$prefix/libexec/libvirt_proxy
> is made setuid root - this allows virt-manager to run as an unprivileged
> user in read-only mode. You still need to run virt-manager as root if 
> you want to do read-write operations.
>
> Regards,
> Dan.
>

On Thu, Nov 09, 2006 at 08:43:35PM -0500, Dan B. Phung
wrote:
> awesome, it works!  kinda....as root it can list the vms, but as a 
> regular user it repeats this message:
> 
>  libvir: error : operation failed: xenProxyListDomains
> 
> which files does virt-manager require suid perms? 
It only needs setuid root on the ''/usr/libexec/libvirt_proxy''
command.
This command is laucnhed automatically by libvirt when needed, but if
you want to debug you can also launch it manually ahead of time.

Regards,
Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=|