Xen

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1

When I start the virtual machine manager I get the following error:

Unable to open a connection to the Xen hypervisor/daemon.

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

Details:

Unable to open connection to hypervisor URI ‘xen:///’:
<class ‘libvirt.libvirtError’> virConnectOpenReadOnly() failed
Traceback (most recent call last):
File “/usr/share/virt-manager/virtManager/connection.py”, line 325, in _open_thread
self.vmm = libvirt.openReadOnly(self.uri)
File “/usr/lib64/python2.5/site-packages/libvirt.py”, line 144, in openReadOnly
if ret is None:raise libvirtError(‘virConnectOpenReadOnly() failed’)
libvirtError: virConnectOpenReadOnly() failed

Any ideas?

2

Did you boot openSUSE selecting the Xen kernel in the boot selection?

3

If I choose the Xen (version # info) option, when I try to launch the virtual manager it just opens and closes very quickly.

4

Actually, you don’t need it. Just manage with xm.

xm start <Domain>

vncviewer localhost:0

Run :-

man xm

I confirm virt-manager collapses immediately when :-

xm info

brctl show

are good

5

they are probably working on your issue here : https://bugzilla.novell.com/show_bug.cgi?id=398932

the xm commands dbaxps mentioned should give you enough tools for now to get things running.

Next to the man pages type ’ xm --help ’ for a list of possible commands.

‘xentop’ and ‘brctl show’ are also valuable commands.

Cheers,
Wj

6

got my links mixed, meant to post this one: https://bugzilla.novell.com/show_bug.cgi?id=402075

I’ve just setup 11.0 with Xen here getting the same results.
dmesg shows :
/usr/share/virt[5555] trap divide error ip:7f69c63c05ac sp:7fffdb0eb9a0 error:0 in libvirt.so.0.4.0[7f69c639f000+5e000]
/usr/share/virt[5562] trap divide error ip:7f0bc9e6b5ac sp:7fffdeb95450 error:0 in libvirt.so.0.4.0[7f0bc9e4a000+5e000]

So the first link does seem related!

7

Is this issue resolved yet? I installed xen yesterday and got exactly the same error message (Unable to open connection to hypervisor URI 'xen…).The updated libvirt seems to have no effect.

8

Solved ! Once you boot into Xen, you have to login as root.Then the virtual machine manager displays all the VMs including dom0

9

…but in order to even access Xen, you have to go through YaST, which requires a root logon. When I try to create a machine it reports “Hypervisor is not running.” I’ve an x86_64 and running a Xen kernel.
Patti:(

10

This might sound stupid but after installing xen through yast, have you actually rebooted into the xen kernel ? Hypervisor does not run if u boot into the normal kernel.

Here is a step by step tutorial to xen.