<p>Check your NFS config for the norootsquash option on the NFS server?</p>
<p><blockquote type="cite">On Jun 18, 2010 3:13 PM, "Matt Breitbach" <<a href="mailto:matthewb@flash.shanje.com">matthewb@flash.shanje.com</a>> wrote:<br><br>Trying to get CentOS with Xen to allow me to put my image files on an NFS<br>
share. I've run into a bunch of errors that I think have lead me to need to<br>
recompile the kernel and enable "Root File System on NFS". I've been<br>
looking for the options in the MenuConfig, but cannot find it. The area<br>
that it's supposed to be in (according to this URL<br>
<a href="http://www.virtuatopia.com/index.php/CentOS_5_-_Build_a_Custom_Xen_Kernel_wi" target="_blank">http://www.virtuatopia.com/index.php/CentOS_5_-_Build_a_Custom_Xen_Kernel_wi</a><br>
th_NFS_Root_Filesystem_(CONFIG_ROOT_NFS)_Support ) is just blank. No option<br>
at all.<br>
<br>
Should I be running in to these issues using CentOS 5.5 and Xen, while<br>
trying to store VM's on an NFS Share? The errors I'm seeing are as follows<br>
:<br>
<br>
Unable to complete install 'libvirt.libvirtError POST operation failed:<br>
xend_post: error from xen daemon: (xend.err 'Device 768 (vbd) could not be<br>
connected. losetup /dev/loop0 /var/lib/xen/images/blah.img failed')<br>
Traceback (most recent call last):<br>
File "/usr/share/virt-manager/virtManager/create.py", line 724, in<br>
do_install<br>
dom = guest.start_install(False, meter = meter)<br>
File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 541, in<br>
start_install<br>
return self._do_install(consolecb, meter, removeOld, wait)<br>
File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 633, in<br>
_do_install<br>
self.domain = self.conn.createLinux(install_xml, 0)<br>
File "/usr/lib64/python2.4/site-packages/libvirt.py", line 974, in<br>
createLinux<br>
if ret is None:raise libvirtError('virDomainCreateLinux() failed',<br>
conn=self)<br>
libvirtError: POST operation failed: xend_post: error from xen daemon:<br>
(xend.err 'Device 768 (vbd) could not be connected. losetup /dev/loop0<br>
/var/lib/xen/images/blah.img failed')<br>
'<br>
<br>
I have my NFS Share mounted to /var/lib/xen/images since that's the default<br>
location. I've also tried mounting it to /vmstorage /mnt/nfsshare and<br>
various other mount points with failures all around.<br>
<br>
<br>
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</blockquote></p>