virt-sysprep: error: libguestfs error: could not create appliance through libvirt.

报错信息如下，截图如上；

[   0.0] Examining the guest ...
virt-sysprep: error: libguestfs error: could not create appliance through 
libvirt.Try running qemu directly without libvirt using this environment variable:
export LIBGUESTFS_BACKEND=directOriginal error from libvirt: \u4e0d\u652f\u6301\u7684\u914d\u7f6e\uff1ashared access for disk 
'sdb' requires use of supported storage format [code=67 int1=-1]If reporting bugs, run virt-sysprep with debugging enabled and include the 
complete output:virt-sysprep -v -x [...]

执行下面命令更新包即可

# yum  upgrade libguestfs-tools
# virt-sysprep -d 虚拟机名