无法完成安装:'Cannot access storage file '/

今天自己编译了spice-protocol spice-gtk spice qemu,然后想用virsh去创建一个虚机：

# virsh define demo.xml

    定义域 demo（从 demo.xml）

# virsh start demo

    cannot access storage file (as uid:107, gid:107)  permission denied

解决方法：

     

Changing /etc/libvirt/qemu.conf make working things.
Uncomment user/group to work as root.

1.  
   # The user for QEMU processes run by the system instance. It can be