libvirt4.0 finds difficulty to gather disk information from rbd(Ceph Storage)

Hi Team,

Greetings!.

I got the following errors from the log file while getting disk size from rbd(Ceph Storage).

libvirtd[1135555]: 2019-09-09 08:30:11.174+0000: 1135569: error : virStorageFileBackendForTypeInternal:242 : internal error: missing storage backend for network files using rbd protocol

I'm using ubuntu 18.04 LTS and my libvirt version is 4.0

rc libvirt-bin 4.0.0-1ubuntu8.11 amd64 programs for the libvirt library
ii libvirt-clients 4.0.0-1ubuntu8.12 amd64 Programs for the libvirt library
ii libvirt-daemon 4.0.0-1ubuntu8.12 amd64 Virtualization daemon
ii libvirt-daemon-driver-storage-rbd 4.0.0-1ubuntu8.12 amd64 Virtualization daemon RBD storage driver
ii libvirt-daemon-system 4.0.0-1ubuntu8.12 amd64 Libvirt daemon configuration files
ii libvirt0:amd64 4.0.0-1ubuntu8.12 amd64 library for interfacing with different virtualization
 systems

Kindly share your thoughts regarding to this issue?

Thank you