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I don't think it has anything to do with root on nfs, that was something used more in the past. Possibly the image file is a sparse file and nfs isn't supporting it. <br></font></div>
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<font face=Tahoma size=2>
<b>From</b>: cialug-bounces@cialug.org <cialug-bounces@cialug.org>
<br><b>To</b>: 'Central Iowa Linux Users Group' <cialug@cialug.org>
<br><b>Sent</b>: Mon Jun 21 09:01:07 2010<br><b>Subject</b>: Re: [Cialug] Root File System on NFS
<br></font><br></div>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>So I've configured the NFS system to allow
root, and the owner of the image file is now root, rather than nfsnobody. I'm still
getting the same error though when I try to boot a VM. It creates the image
file just fine, but won't boot. FYI - creating the file locally works just dandy,
but a 40GB SSD isn't going to hold many VM's.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
cialug-bounces@cialug.org [mailto:cialug-bounces@cialug.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>kristau<br>
<b><span style='font-weight:bold'>Sent:</span></b> Saturday, June 19, 2010
11:16 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Central
Iowa Linux Users Group</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Cialug] Root File
System on NFS</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>Check
your NFS config for the norootsquash option on the NFS server?<o:p></o:p></span></font></p>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>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>
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