添加xml文件：
官方xml文件：
1 <disk type='network'> 2 <driver name="qemu" type="raw" io="threads" ioeventfd="on" event_idx="off"/> 3 <source protocol="sheepdog" name="image_name"> 4 <host name="hostname" port="7000"/> 5 </source> 6 <target dev="hdb" bus="ide"/> 7 <boot order='1'/> 8 <transient/> 9 <address type='drive' controller='0' bus='1' unit='0'/> 10 </disk>
实际测试发现，qemu需要添加path才支持部分功能：如 ioeventfd="on" event_idx="off"和<transient/>
部分patch地址：https://www.redhat.com/archives/libvir-list/2011-August/msg00555.html
实践可用xml文件：
1 <disk type='network'> 2 <driver name="qemu" type="raw" io="threads"/> 3 <source protocol="sheepdog" name="image_name"> 4 <host name="hostname" port="7000"/> 5 </source> 6 <target dev="hdb" bus="ide"/> 7 <boot order='1'/> 8 <address type='drive' controller='0' bus='1' unit='0'/> 9 </disk>