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Bug 1892618

Summary: NFS - Unable to backup a volume with snapshot
Product: Red Hat OpenStack Reporter: bkopilov <bkopilov>
Component: openstack-cinderAssignee: Gorka Eguileor <geguileo>
Status: CLOSED ERRATA QA Contact: Tzach Shefi <tshefi>
Severity: high Docs Contact: Andy Stillman <astillma>
Priority: high    
Version: 16.1 (Train)CC: gcharot, gfidente
Target Milestone: z6Keywords: Triaged
Target Release: 16.1 (Train on RHEL 8.2)   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: openstack-cinder-15.3.1-7.el8ost Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
: 1892734 (view as bug list) Environment:
Last Closed: 2021-05-26 13:49:37 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1892734, 1892770    

Description bkopilov 2020-10-29 10:40:10 UTC
Looks like we are not able to backup NFS storage when adding --snapshot-id

Steps:
Create a volume VOL
Create a snapshot from the volume VOL - [name: SNAP]
Create a backup VOL --snapshot-id SNAP ---> Fails.

Is it a known issue?  ( i see that the same test works on CEPH storage)
The error from NFS  is "cinder.exception.InvalidSnapshot: Snapshot status must be "available" to clone. But is backing-up"

info : 

test volume_backup_with_snapshot --fails NFS

(overcloud) [stack@undercloud-0 tempest-dir]$ cinder show 5bea6aa6-cc2b-4a62-9074-9ce1375218c0
+--------------------------------+--------------------------------------+
| Property                       | Value                                |
+--------------------------------+--------------------------------------+
| attached_servers               | []                                   |
| attachment_ids                 | []                                   |
| availability_zone              | nova                                 |
| bootable                       | false                                |
| consistencygroup_id            | None                                 |
| created_at                     | 2020-10-29T07:14:42.000000           |
| description                    | None                                 |
| encrypted                      | False                                |
| id                             | 5bea6aa6-cc2b-4a62-9074-9ce1375218c0 |
| metadata                       |                                      |
| migration_status               | None                                 |
| multiattach                    | False                                |
| name                           | test                                 |
| os-vol-host-attr:host          | hostgroup@tripleo_nfs#tripleo_nfs    |
| os-vol-mig-status-attr:migstat | None                                 |
| os-vol-mig-status-attr:name_id | None                                 |
| os-vol-tenant-attr:tenant_id   | 5a491aeebb514f8f99ede8e9003bc1a9     |
| replication_status             | None                                 |
| size                           | 1                                    |
| snapshot_id                    | None                                 |
| source_volid                   | None                                 |
| status                         | available                            |
| updated_at                     | 2020-10-29T07:14:43.000000           |
| user_id                        | 76a40a7d587d4d058b59fd9ae3128132     |
| volume_type                    | tripleo                              |
+--------------------------------+--------------------------------------+


(overcloud) [stack@undercloud-0 tempest-dir]$ cinder snapshot-show 0381cde5-e810-437a-a292-a8059ff03508
+--------------------------------------------+--------------------------------------+
| Property                                   | Value                                |
+--------------------------------------------+--------------------------------------+
| created_at                                 | 2020-10-29T07:15:17.000000           |
| description                                | None                                 |
| id                                         | 0381cde5-e810-437a-a292-a8059ff03508 |
| metadata                                   | {}                                   |
| name                                       | test                                 |
| os-extended-snapshot-attributes:progress   | 100%                                 |
| os-extended-snapshot-attributes:project_id | 5a491aeebb514f8f99ede8e9003bc1a9     |
| size                                       | 1                                    |
| status                                     | available                            |
| updated_at                                 | 2020-10-29T07:18:25.000000           |
| volume_id                                  | 5bea6aa6-cc2b-4a62-9074-9ce1375218c0 |
+--------------------------------------------+--------------------------------------+


# cinder backup-create 5bea6aa6-cc2b-4a62-9074-9ce1375218c0 --snapshot-id 0381cde5-e810-437a-a292-a8059ff03508 -- >Fails .

(overcloud) [stack@undercloud-0 tempest-dir]$ cinder backup-list
+--------------------------------------+--------------------------------------+--------+------+------+--------------+-----------+
| ID                                   | Volume ID                            | Status | Name | Size | Object Count | Container |
+--------------------------------------+--------------------------------------+--------+------+------+--------------+-----------+
| 4235d937-611a-40cb-b2dc-2d4f33aee9fb | 5bea6aa6-cc2b-4a62-9074-9ce1375218c0 | error  | -    | 1    | 0            | -         |
+--------------------------------------+--------------------------------------+--------+------+------+--------------+-----------+




==== controller-1 controllers ====
/var/log/containers/cinder/cinder-backup.log:16:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server [req-c20051cd-29ad-4221-b8f1-c949512c64e1 76a40a7d587d4d058b59fd9ae3128132 5a491aeebb514f8f99ede8e9003bc1a9 - default default] Exception during message handling: cinder.exception_Remote.InvalidSnapshot_Remote: Snapshot status must be "available" to clone. But is: backing-up
/var/log/containers/cinder/cinder-backup.log:64:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
/var/log/containers/cinder/cinder-backup.log:65:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/rpc/server.py", line 165, in _process_incoming
/var/log/containers/cinder/cinder-backup.log:66:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
/var/log/containers/cinder/cinder-backup.log:67:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/rpc/dispatcher.py", line 274, in dispatch
/var/log/containers/cinder/cinder-backup.log:68:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
/var/log/containers/cinder/cinder-backup.log:69:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
/var/log/containers/cinder/cinder-backup.log:70:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     result = func(ctxt, **new_args)
/var/log/containers/cinder/cinder-backup.log:71:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/backup/manager.py", line 417, in create_backup
/var/log/containers/cinder/cinder-backup.log:72:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     self._update_backup_error(backup, six.text_type(err))
/var/log/containers/cinder/cinder-backup.log:73:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_utils/excutils.py", line 220, in __exit__
/var/log/containers/cinder/cinder-backup.log:74:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     self.force_reraise()
/var/log/containers/cinder/cinder-backup.log:75:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
/var/log/containers/cinder/cinder-backup.log:76:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
/var/log/containers/cinder/cinder-backup.log:77:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/six.py", line 675, in reraise
/var/log/containers/cinder/cinder-backup.log:78:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     raise value
/var/log/containers/cinder/cinder-backup.log:79:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/backup/manager.py", line 406, in create_backup
/var/log/containers/cinder/cinder-backup.log:80:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     updates = self._run_backup(context, backup, volume)
/var/log/containers/cinder/cinder-backup.log:81:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/backup/manager.py", line 473, in _run_backup
/var/log/containers/cinder/cinder-backup.log:82:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     volume)
/var/log/containers/cinder/cinder-backup.log:83:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/volume/rpcapi.py", line 347, in get_backup_device
/var/log/containers/cinder/cinder-backup.log:84:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     want_objects=True)
/var/log/containers/cinder/cinder-backup.log:85:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/rpc/client.py", line 181, in call
/var/log/containers/cinder/cinder-backup.log:86:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     transport_options=self.transport_options)
/var/log/containers/cinder/cinder-backup.log:87:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/transport.py", line 129, in _send
/var/log/containers/cinder/cinder-backup.log:88:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     transport_options=transport_options)
/var/log/containers/cinder/cinder-backup.log:89:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 646, in send
/var/log/containers/cinder/cinder-backup.log:90:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     transport_options=transport_options)
/var/log/containers/cinder/cinder-backup.log:91:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 636, in _send
/var/log/containers/cinder/cinder-backup.log:92:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     raise result
/var/log/containers/cinder/cinder-backup.log:93:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server cinder.exception_Remote.InvalidSnapshot_Remote: Snapshot status must be "available" to clone. But is: backing-up
/var/log/containers/cinder/cinder-backup.log:94:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
/var/log/containers/cinder/cinder-backup.log:95:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:96:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/rpc/server.py", line 165, in _process_incoming
/var/log/containers/cinder/cinder-backup.log:97:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
/var/log/containers/cinder/cinder-backup.log:98:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:99:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/rpc/dispatcher.py", line 274, in dispatch
/var/log/containers/cinder/cinder-backup.log:100:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
/var/log/containers/cinder/cinder-backup.log:101:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:102:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
/var/log/containers/cinder/cinder-backup.log:103:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     result = func(ctxt, **new_args)
/var/log/containers/cinder/cinder-backup.log:104:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:105:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/volume/manager.py", line 4447, in get_backup_device
/var/log/containers/cinder/cinder-backup.log:106:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     self.driver.get_backup_device(ctxt, backup))
/var/log/containers/cinder/cinder-backup.log:107:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:108:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/volume/driver.py", line 1192, in get_backup_device
/var/log/containers/cinder/cinder-backup.log:109:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     context, backup)
/var/log/containers/cinder/cinder-backup.log:110:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:111:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/volume/driver.py", line 1220, in _get_backup_volume_temp_volume
/var/log/containers/cinder/cinder-backup.log:112:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     context, volume, snapshot)
/var/log/containers/cinder/cinder-backup.log:113:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:114:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/volume/driver.py", line 1357, in _create_temp_volume_from_snapshot
/var/log/containers/cinder/cinder-backup.log:115:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     temp_vol_ref.destroy()
/var/log/containers/cinder/cinder-backup.log:116:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:117:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_utils/excutils.py", line 220, in __exit__
/var/log/containers/cinder/cinder-backup.log:118:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     self.force_reraise()
/var/log/containers/cinder/cinder-backup.log:119:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:120:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
/var/log/containers/cinder/cinder-backup.log:121:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
/var/log/containers/cinder/cinder-backup.log:122:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:123:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/six.py", line 675, in reraise
/var/log/containers/cinder/cinder-backup.log:124:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     raise value
/var/log/containers/cinder/cinder-backup.log:125:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:126:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/volume/driver.py", line 1352, in _create_temp_volume_from_snapshot
/var/log/containers/cinder/cinder-backup.log:127:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     snapshot)
/var/log/containers/cinder/cinder-backup.log:128:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:129:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "<decorator-gen-249>", line 2, in create_volume_from_snapshot
/var/log/containers/cinder/cinder-backup.log:130:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:131:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/coordination.py", line 151, in _synchronized
/var/log/containers/cinder/cinder-backup.log:132:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     return f(*a, **k)
/var/log/containers/cinder/cinder-backup.log:133:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:134:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/volume/drivers/remotefs.py", line 1699, in create_volume_from_snapshot
/var/log/containers/cinder/cinder-backup.log:135:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     return self._create_volume_from_snapshot(volume, snapshot)
/var/log/containers/cinder/cinder-backup.log:136:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:137:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/cinder/volume/drivers/remotefs.py", line 1265, in _create_volume_from_snapshot
/var/log/containers/cinder/cinder-backup.log:138:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server     raise exception.InvalidSnapshot(msg)
/var/log/containers/cinder/cinder-backup.log:139:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:140:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server cinder.exception.InvalidSnapshot: Snapshot status must be "available" to clone. But is: backing-up
/var/log/containers/cinder/cinder-backup.log:141:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
/var/log/containers/cinder/cinder-backup.log:142:2020-10-29 07:22:19.043 24 ERROR oslo_messaging.rpc.server 
Warning: Permanently added '192.168.24.19' (ECDSA) to the list of known hosts.
This system is not registered to Red Hat Insights. See https://cloud.redhat.com/
To register this system, run: insights-client --register

Comment 8 Tzach Shefi 2021-04-15 18:40:11 UTC
Verified on:
openstack-cinder-15.3.1-7.el8ost.noarch

Create a volume on NFS backend:

(overcloud) [stack@undercloud-0 ~]$ cinder create 3 --name volA
+--------------------------------+--------------------------------------+
| Property                       | Value                                |
+--------------------------------+--------------------------------------+
| attachments                    | []                                   |
| availability_zone              | nova                                 |
| bootable                       | false                                |
| consistencygroup_id            | None                                 |
| created_at                     | 2021-04-15T17:13:30.000000           |
| description                    | None                                 |
| encrypted                      | False                                |
| id                             | a99f7934-cae5-45e4-bc40-50a0d37b0a95 |
| metadata                       | {}                                   |
| migration_status               | None                                 |
| multiattach                    | False                                |
| name                           | volA                                 |
| os-vol-host-attr:host          | hostgroup@tripleo_nfs#tripleo_nfs    |
| os-vol-mig-status-attr:migstat | None                                 |
| os-vol-mig-status-attr:name_id | None                                 |
| os-vol-tenant-attr:tenant_id   | 8600897b0a8b4f9d8c333217b0c8cb21     |
| replication_status             | None                                 |
| size                           | 3                                    |
| snapshot_id                    | None                                 |
| source_volid                   | None                                 |
| status                         | creating                             |
| updated_at                     | 2021-04-15T17:13:30.000000           |
| user_id                        | 9bce32ace9eb467880ce6042638d9b1b     |
| volume_type                    | tripleo                              |
+--------------------------------+--------------------------------------+

Attach vol to instance, wrote data, detach volume.

Create snapshot of volume:
(overcloud) [stack@undercloud-0 ~]$ cinder snapshot-create a99f7934-cae5-45e4-bc40-50a0d37b0a95 --name span1
+-------------+--------------------------------------+
| Property    | Value                                |
+-------------+--------------------------------------+
| created_at  | 2021-04-15T18:32:36.941419           |
| description | None                                 |
| id          | 75bc4935-be03-4985-a33b-8582fb45704f |
| metadata    | {}                                   |
| name        | span1                                |
| size        | 3                                    |
| status      | creating                             |
| updated_at  | None                                 |
| volume_id   | a99f7934-cae5-45e4-bc40-50a0d37b0a95 |
+-------------+--------------------------------------+

(overcloud) [stack@undercloud-0 ~]$ cinder snapshot-list
+--------------------------------------+--------------------------------------+-----------+-------+------+
| ID                                   | Volume ID                            | Status    | Name  | Size |
+--------------------------------------+--------------------------------------+-----------+-------+------+
| 75bc4935-be03-4985-a33b-8582fb45704f | a99f7934-cae5-45e4-bc40-50a0d37b0a95 | available | span1 | 3    |
+--------------------------------------+--------------------------------------+-----------+-------+------+

Backup the snapshot:
(overcloud) [stack@undercloud-0 ~]$ cinder backup-create a99f7934-cae5-45e4-bc40-50a0d37b0a95 --snapshot-id 75bc4935-be03-4985-a33b-8582fb45704f --name SnapshotBackup
+-----------+--------------------------------------+
| Property  | Value                                |
+-----------+--------------------------------------+
| id        | 3cf9fa4d-61fa-4f75-8c1c-b54a6321cc35 |
| name      | SnapshotBackup                       |
| volume_id | a99f7934-cae5-45e4-bc40-50a0d37b0a95 |
+-----------+--------------------------------------+


(overcloud) [stack@undercloud-0 ~]$ cinder backup-list
+--------------------------------------+--------------------------------------+----------+----------------+------+--------------+-----------+
| ID                                   | Volume ID                            | Status   | Name           | Size | Object Count | Container |
+--------------------------------------+--------------------------------------+----------+----------------+------+--------------+-----------+
| 3cf9fa4d-61fa-4f75-8c1c-b54a6321cc35 | a99f7934-cae5-45e4-bc40-50a0d37b0a95 | creating | SnapshotBackup | 3    | 0            | -         |
+--------------------------------------+--------------------------------------+----------+----------------+------+--------------+-----------+


Backup is successfully created this time:
(overcloud) [stack@undercloud-0 ~]$ cinder backup-list
+--------------------------------------+--------------------------------------+-----------+----------------+------+--------------+---------------+
| ID                                   | Volume ID                            | Status    | Name           | Size | Object Count | Container     |
+--------------------------------------+--------------------------------------+-----------+----------------+------+--------------+---------------+
| 3cf9fa4d-61fa-4f75-8c1c-b54a6321cc35 | a99f7934-cae5-45e4-bc40-50a0d37b0a95 | available | SnapshotBackup | 3    | 62           | volumebackups |
+--------------------------------------+--------------------------------------+-----------+----------------+------+--------------+---------------+

Good to verify.

Comment 15 errata-xmlrpc 2021-05-26 13:49:37 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Red Hat OpenStack Platform 16.1.6 bug fix and enhancement advisory), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:2097