Hi, am trying to use cinder backup using NFS driver, Placed below code on cinder.conf

backup_driver = cinder.backup.drivers.nfs
backup_share = xx.xx.xx.xx:/nfsshares
backup_mount_options = rw,vers=4.1
backup_mount_point_base = /nfs_backup
backup_compression_algorithm = zlib
backup_sha_block_size_bytes = 32768
backup_file_size = 1999994880

I have a volume id(63dc5d69-12ba-4a34-bb39-87df3a89677e) created via cinder on EMC storage array which has a snapshot (5f81b0b3-0ecd-4092-94a7-acd3ca762c2e), trying to backup the Snapshot to NFS share.

server@openstack:~$ openstack volume backup create --name test-backup --force --snapshot 5f81b0b3-0ecd-4092-94a7-acd3ca762c2e 63dc5d69-12ba-4a34-bb39-87df3a89677e
+-------+--------------------------------------+
| Field | Value                                |
+-------+--------------------------------------+
| id    | 72bf1d2c-134b-40dd-a6a4-4eedda0b6ffe |
| name  | test-backup                          |
+-------+--------------------------------------+

But it fails with error message " Timed out waiting for a reply to message ID 412be780096540b38ee0bb187b6927d6 "

server@openstack:~$ openstack volume backup show 72bf1d2c-134b-40dd-a6a4-4eedda0b6ffe
+-----------------------+------------------------------------------------------------------------------+
| Field                 | Value                                                                        |
+-----------------------+------------------------------------------------------------------------------+
| availability_zone     | nova                                                                         |
| container             | None                                                                         |
| created_at            | 2018-10-29T08:20:56.000000                                                   |
| data_timestamp        | 2018-10-29T01:50:30.000000                                                   |
| description           | None                                                                         |
| fail_reason           | Timed out waiting for a reply to message ID 412be780096540b38ee0bb187b6927d6 |
| has_dependent_backups | False                                                                        |
| id                    | 72bf1d2c-134b-40dd-a6a4-4eedda0b6ffe                                         |
| is_incremental        | False                                                                        |
| name                  | test-backup                                                                  |
| object_count          | 0                                                                            |
| size                  | 20                                                                           |
| snapshot_id           | 5f81b0b3-0ecd-4092-94a7-acd3ca762c2e                                         |
| status                | error                                                                        |
| updated_at            | 2018-10-29T08:21:56.000000                                                   |
| volume_id             | 63dc5d69-12ba-4a34-bb39-87df3a89677e                                         |
+-----------------------+------------------------------------------------------------------------------+
server@openstack:~$

The same error is displayed on cinder-backup.log, Can someone Please help.. The document am following to get this setup is https://docs.openstack.org/ocata/admi...

Pfa, cinder-backup logs here https://files.fm/u/4fxzxekb

Thanks!!!