Hi:<div>I downloaded a cirros-0.3.0-x86_64-rootfs.img and mount it to /tmp/bak</div><div>then I edit a xml file ,here is the content:</div><div><br></div><div>&lt;domain type='lxc'&gt;</div><div>&nbsp; &lt;name&gt;vm1&lt;/name&gt;</div><div>&nbsp; &lt;memory&gt;500000&lt;/memory&gt;</div><div>&nbsp; &lt;os&gt;</div><div>&nbsp; &nbsp; &lt;type&gt;exe&lt;/type&gt;</div><div>&nbsp; &nbsp; &lt;init&gt;/bin/sh&lt;/init&gt;</div><div>&nbsp; &lt;/os&gt;</div><div>&nbsp; &lt;vcpu&gt;1&lt;/vcpu&gt;</div><div>&nbsp; &lt;clock offset='utc'/&gt;</div><div>&nbsp; &lt;on_poweroff&gt;destroy&lt;/on_poweroff&gt;</div><div>&nbsp; &lt;on_reboot&gt;restart&lt;/on_reboot&gt;</div><div>&nbsp; &lt;on_crash&gt;destroy&lt;/on_crash&gt;</div><div>&nbsp; &lt;devices&gt;</div><div>&nbsp; &nbsp; &lt;emulator&gt;/usr/libexec/libvirt_lxc&lt;/emulator&gt;</div><div>&nbsp; &nbsp; &lt;filesystem type='mount'&gt;</div><div>&nbsp; &nbsp; &nbsp; &lt;source dir='/tmp/bak'/&gt;</div><div>&nbsp; &nbsp; &nbsp; &lt;target dir='/'/&gt;</div><div>&nbsp; &nbsp; &lt;/filesystem&gt;</div><div>&nbsp; &nbsp; &lt;interface type='network'&gt;</div><div>&nbsp; &nbsp; &nbsp; &lt;source network='default'/&gt;</div><div>&nbsp; &nbsp; &lt;/interface&gt;</div><div>&nbsp; &nbsp; &lt;console type='pty' /&gt;</div><div>&nbsp; &lt;/devices&gt;</div><div>&lt;/domain&gt;</div><div><br></div><div>I defined it and no error , but when I start it , it comes with&nbsp;</div><div><div>error: Failed to start domain vm1</div><div>error: internal error guest failed to start: 2012-10-24 13:08:14.684+0000: 16935: info : libvirt version: 0.9.10, package: 21.el6_3.4 (CentOS BuildSystem &lt;http://bugs.centos.org&gt;, 2012-08-23-18:28:26, c6b9.bsys.dev.centos.org)</div><div>2012-10-24 13:08:14.684+0000: 16935: error : lxcControllerRun:1484 : Failed to query file context on /tmp/bak: No data available</div></div><div><br></div><div>here is the&nbsp;ls -al /tmp/bak</div><div><div>total 92</div><div>drwxr-xr-x &nbsp;21 root root 4096 Oct 24 20:43 .</div><div>drwxrwxrwt. &nbsp;5 root root 4096 Oct 24 21:08 ..</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 bin</div><div>drwxr-xr-x &nbsp; 3 root root 4096 Oct 24 20:43 boot</div><div>drwxr-xr-x &nbsp; 3 root root 4096 Oct 24 20:43 dev</div><div>drwxr-xr-x &nbsp; 7 root root 4096 Oct 24 20:43 etc</div><div>drwxr-xr-x &nbsp; 4 root root 4096 Oct 24 20:43 home</div><div>-rwxr-xr-x &nbsp; 1 root root 2785 Oct 24 20:43 init</div><div>lrwxrwxrwx &nbsp; 1 root root &nbsp; 32 Oct 24 20:43 initrd.img -&gt; boot/initrd.img-3.0.0-12-virtual</div><div>drwxr-xr-x &nbsp; 4 root root 4096 Oct 24 20:43 lib</div><div>lrwxrwxrwx &nbsp; 1 root root &nbsp; 11 Oct 24 20:43 linuxrc -&gt; bin/busybox</div><div>drwx------ &nbsp; 2 root root 4096 Oct 24 20:43 lost+found</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 mnt</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 .oldroot</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 old-root</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 opt</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 proc</div><div>drwx------ &nbsp; 2 root root 4096 Oct 24 20:43 root</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 run</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 sbin</div><div>drwxr-xr-x &nbsp; 2 root root 4096 Oct 24 20:43 sys</div><div>drwxr-xr-t &nbsp; 3 root root 4096 Oct 24 20:43 tmp</div><div>drwxr-xr-x &nbsp; 6 root root 4096 Oct 24 20:43 usr</div><div>drwxr-xr-x &nbsp; 8 root root 4096 Oct 24 20:43 var</div><div>lrwxrwxrwx &nbsp; 1 root root &nbsp; 29 Oct 24 20:43 vmlinuz -&gt; boot/vmlinuz-3.0.0-12-virtual</div></div><div><br></div><div>How can I &nbsp;solve this problem?&nbsp;</div><div><br></div><div>Thanks :-)</div>