Description
===========
Plain generic NFS and encrypted NFS do not perform the attach on the first attempt.
The operation is shown as successful "attachment_update completed successfully", but immediately afterward c-vol shows "Terminate volume connection completed successfully" and the volume is not attached to the instance.
This happens only on the first attempt and works as expected when you try a second or third time.
1. Create a nfs/luks1 volume
2. attach it to an instance
c-vol logs:
==========
cinder-volume[358033]: DEBUG cinder.volume.drivers.nfs [req-1835be0e-617b-4694-8357-141e3d7235bb req-1c96f4ba-d140-4365-b3cc-adb0965efb77 admin None] NfsDriver: conn_info: {'driver_volume_type': 'nfs', 'data':
{'export': 'localhost:/srv/nfs1', 'name': 'volume-66354715-b82a-42ee-b41e-661e9f6e7d42', 'options': None, 'format': 'qcow2'}, 'mount_point_base': '/opt/stack/data/cinder/mnt'} {{(pid=358033) initialize_connection /opt/stack/cinder/cinder/
volume/drivers/nfs.py:165}}
cinder-volume[358033]: DEBUG cinder.volume.manager [req-1835be0e-617b-4694-8357-141e3d7235bb req-1c96f4ba-d140-4365-b3cc-adb0965efb77 admin None] Connection info returned from driver {'export': 'localhost:/srv/
nfs1', 'name': 'volume-66354715-b82a-42ee-b41e-661e9f6e7d42', 'options': None, 'format': 'qcow2', 'qos_specs': None, 'access_mode': 'rw', 'encrypted': True, 'cacheable': False, 'driver_volume_type': 'nfs', 'mount_point_base': '/opt/stack/
data/cinder/mnt', 'attachment_id': '3df03703-df69-45ca-81fc-e0567cd11dc8'} {{(pid=358033) _connection_create /opt/stack/cinder/cinder/volume/manager.py:4827}}
cinder-volume[358033]: INFO cinder.volume.manager [req-1835be0e-617b-4694-8357-141e3d7235bb req-1c96f4ba-d140-4365-b3cc-adb0965efb77 admin None] attachment_update completed successfully.
cinder-volume[358033]: INFO cinder.volume.manager [req-1835be0e-617b-4694-8357-141e3d7235bb req-b6c27351-2c86-450b-afe2-093dc8145800 admin None] Terminate volume connection completed successfully.
cinder-volume[358033]: DEBUG cinder.volume.manager [req-1835be0e-617b-4694-8357-141e3d7235bb req-b6c27351-2c86-450b-afe2-093dc8145800 admin None] Deleting attachment 3df03703-df69-45ca-81fc-e0567cd11dc8. {{(pid
=358033) attachment_delete /opt/stack/cinder/cinder/volume/manager.py:4958}}
