[libvirt-users] virsh start failed (Failed to query file context on ...)

Binknight zheng_huabin at 163.com
Wed Oct 10 10:04:08 UTC 2012

hi all,

    I try to follow the instructions in http://libvirt.org/drvlxc.html to config libvirt-lxc, but failed when starting the lxc.

    The domain config file:
# cat b.xml 

<domain type='lxc'>
  <clock offset='utc'/>
    <filesystem type='mount'>
      <source dir='/data/lxc/centos6'/>
      <target dir='/'/>
    <interface type='network'>
      <source network='default'/>
    <console type='pty' />

then define it:
# virsh --connect lxc:/// define b.xml
Domain b defined from b.xml

then start:
# virsh --connect lxc:/// start b    
error: Failed to start domain b
error: internal error guest failed to start: 2012-10-10 09:56:17.369+0000: 452722: info : libvirt version: 0.9.10, package: 21.el6_3.4 (CentOS BuildSystem <http://bugs.centos.org>, 2012-08-23-18:28:26, c6b9.bsys.dev.centos.org)
2012-10-10 09:56:17.369+0000: 452722: error : lxcControllerRun:1484 : Failed to query file context on /data/lxc/centos6: No data available

It's the filesystem mount section that cause this problem. The tutorial says the path '/data/lxc/centos6' should be "private root filesystem (perhaps hand-crafted using busybox, or installed from media, debootstrap, whatever)", but I am not quite clear about what this path should be. In my case, the "/data/lxc/centos6" is the root of template downloaded from http://wiki.openvz.org/Download/template/precreated. 

# pwd
# ls
bin  boot  dev  etc  fastboot  home  lib  media  mnt  opt  proc  root  sbin  selinux  srv  sys  tmp  usr  var

Can someone elaborate what should <source dir='/data/lxc/centos6'/> be?

many thanks
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