Cinder service with NFS backend failed to start

Issue

• After fresh deployment, the cinder service with NFS backend shows status down.

  (overcloud) [stack@rhosbng3-mgmt ~]$ cinder service-list
  +------------------+------------------------+------+---------+-------+----------------------------+-----------------+
  | Binary           | Host                   | Zone | Status  | State | Updated_at                 | Disabled Reason |
  +------------------+------------------------+------+---------+-------+----------------------------+-----------------+
  | cinder-scheduler | overcloud-controller-0 | nova | enabled | up    | 2019-06-11T17:53:17.000000 | -               |
  | cinder-volume    | hostgroup@tripleo_nfs  | nova | enabled | down  | 2019-06-11T17:08:28.000000 | -               |
  +------------------+------------------------+------+---------+-------+----------------------------+-----------------+