Created attachment 1544543 [details]
output of "openstack volume ... --verbose --debug"

Description of problem:
On deployed OSP14 overcloud it is not possible to restore volume backup using standardized python2-openstaclient's interface, it is possible only using python-cinder's one.

(overcloud) [stack@undercloud-0 ~]$ openstack image list
+--------------------------------------+--------------------------------------------------------+--------+
| ID                                   | Name                                                   | Status |
+--------------------------------------+--------------------------------------------------------+--------+
| c05d0150-c881-4cae-a60f-d7a9635f0222 | cirros-0.3.5-x86_64-disk.img                           | active |
| 93a1f193-b2e3-435d-a8d8-fc4501eb8d1e | cirros-0.3.5-x86_64-disk.img_alt                       | active |
+--------------------------------------+--------------------------------------------------------+--------+
$ openstack volume create test --image cirros-0.3.5-x86_64-disk.img --size 1
$ openstack volume backup create test --name backup_test
$ openstack volume backup restore backup_test test
'VolumeBackupsRestore' object is not iterable
$ echo $?
1

# In depth "openstack volume backup restore backup_test test --verbose --debug" ends with
...
RESP BODY: {"restore": {"backup_id": "e5442d2e-fe71-4365-8f28-a650c7339f9b", "volume_name": "test2", "volume_id": "7bd88087-1608-49ff-a668-731277e67a0c"}}
POST call to volumev3 for http://10.0.0.113:8776/v3/223d15715dd24bd2ac9a52795379f3b7/backups/e5442d2e-fe71-4365-8f28-a650c7339f9b/restore used request id req-496e2897-1ed7-43be-9444-84d50803ac18
'VolumeBackupsRestore' object is not iterable
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 402, in run_subcommand
    result = cmd.run(parsed_args)
  File "/usr/lib/python2.7/site-packages/osc_lib/command/command.py", line 41, in run
    return super(Command, self).run(parsed_args)
  File "/usr/lib/python2.7/site-packages/cliff/display.py", line 116, in run
    column_names, data = self.take_action(parsed_args)
TypeError: 'VolumeBackupsRestore' object is not iterable
clean_up RestoreVolumeBackup: 'VolumeBackupsRestore' object is not iterable
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 135, in run
    ret_val = super(OpenStackShell, self).run(argv)
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 281, in run
    result = self.run_subcommand(remainder)
  File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 175, in run_subcommand
    ret_value = super(OpenStackShell, self).run_subcommand(argv)
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 402, in run_subcommand
    result = cmd.run(parsed_args)
  File "/usr/lib/python2.7/site-packages/osc_lib/command/command.py", line 41, in run
    return super(Command, self).run(parsed_args)
  File "/usr/lib/python2.7/site-packages/cliff/display.py", line 116, in run
    column_names, data = self.take_action(parsed_args)
TypeError: 'VolumeBackupsRestore' object is not iterable

END return value: 1

# but on the other hand, using the old cinder CLI:

$ cinder backup-restore --volume test backup_test
+-------------+--------------------------------------+
| Property    | Value                                |
+-------------+--------------------------------------+
| backup_id   | e5442d2e-fe71-4365-8f28-a650c7339f9b |
| volume_id   | 7bd88087-1608-49ff-a668-731277e67a0c |
| volume_name | test                                 |
+-------------+--------------------------------------+
(overcloud) [stack@undercloud-0 ~]$ echo $?
0

Version-Release number of selected component (if applicable):
OSP14

How reproducible:
Always

Steps to Reproduce:
1. Deploy OSP14 topology 1uc,3contr,2comp,3ceph using Infrared
2. Access stack@undercloud, source ~/overcloudrc
3. Perform above

Additional info:
python2-openstackclient-3.16.2-1.el7ost.noarch