Manage External Volume with Cinder NFS Driver

Issue

• The generic cinder NFS driver does not support managing external volumes not already controlled by the driver in cinder:

• The cinder log is reporting the below when we execute the manage and manageable-list commands:

Command: cinder manage --name=test-random-vol hostgroup@tripleo_nfs2#tripleo_nfs2 manageme
+--------------------------------+--------------------------------------+
| Property                       | Value                                |
+--------------------------------+--------------------------------------+
| attachments                    | []                                   |
| availability_zone              | nova                                 |
| bootable                       | false                                |
| consistencygroup_id            | None                                 |
| created_at                     | 2020-07-01T19:15:55.000000           |
| description                    | None                                 |
| encrypted                      | False                                |
| id                             | 0ab28721-62f4-4074-bce3-6c62eb9985a5 |
| metadata                       | {}                                   |
| migration_status               | None                                 |
| multiattach                    | False                                |
| name                           | test-random-vol                      |
| os-vol-host-attr:host          | hostgroup@tripleo_nfs2#tripleo_nfs2  |
| os-vol-mig-status-attr:migstat | None                                 |
| os-vol-mig-status-attr:name_id | None                                 |
| os-vol-tenant-attr:tenant_id   | 10570a14234f4765b87df6606657ac70     |
| replication_status             | None                                 |
| size                           | 0                                    |
| snapshot_id                    | None                                 |
| source_volid                   | None                                 |
| status                         | error                                |
| updated_at                     | 2020-07-01T19:15:56.000000           |
| user_id                        | 9b17ca9a726a4baf821bbaec9cfb5db4     |
| volume_type                    | None                                 |
+--------------------------------+--------------------------------------+

2020-07-01 19:18:40.397 153 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2020-07-01 19:18:40.397 153 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2020-07-01 19:18:40.397 153 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/cinder/volume/manager.py", line 2943, in get_manageable_volumes
2020-07-01 19:18:40.397 153 ERROR oslo_messaging.rpc.server     driver_entries = self.driver.get_manageable_volumes(
2020-07-01 19:18:40.397 153 ERROR oslo_messaging.rpc.server AttributeError: 'NfsDriver' object has no attribute 'get_manageable_volumes'

2020-07-01 19:15:56.248 153 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2020-07-01 19:15:56.248 153 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2020-07-01 19:15:56.248 153 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/cinder/volume/flows/manager/manage_existing.py", line 55, in execute
2020-07-01 19:15:56.248 153 ERROR oslo_messaging.rpc.server     size = self.driver.manage_existing_get_size(volume,
2020-07-01 19:15:56.248 153 ERROR oslo_messaging.rpc.server AttributeError: 'NfsDriver' object has no attribute 'manage_existing_get_size'