如何configurationDRBD到libvirt存储池?

我想将DRBD复制的存储(2个节点Active / Passive)公开为libvirt作为qcow2文件的存储池。 但是,我有以下错误消息:

virsh pool-create-as qcow2 --type=logical --target=/dev/drbd1 error: Failed to create pool qcow2 error: internal error: missing backend for pool type 3 (logical) 

如果我正在使用多path设备,那么它在libvirt环境中有0个容量。

 root@astranode0:/home/frolo# virsh pool-create-as qcow2 --type=mpath --target=/dev/mapper/vg1-qcow2 setlocale: No such file or directory Pool qcow2 created root@astranode0:/home/frolo# virsh pool-info qcow2 setlocale: No such file or directory Name: qcow2 UUID: fa3b18a5-d849-43d9-86d2-96633367e8c7 State: running Persistent: no Autostart: no Capacity: 0.00 B Allocation: 0.00 B Available: 0.00 B 

我做错了什么? 我将不胜感激任何帮助! 谢谢!