trove create MySQL replica failure
My environment：
Deployed with Kolla，Stein version
guest image ( trove-ussuri-mysql-ubuntu-xenial.qcow2 ) download in http://tarballs.openstack.org/trove/images/
When I use backup_strategy = InnoBackupEx, I can successfully create the replica.
But when I use backup_strategy = MySQLDump, I failed to create a replica.
Here is the error message：
| encrypted_rpc_messaging | True |
| fault | Error creating replication snapshot from instance cb27dba9-8c85-454a-b57d-326ce7885b07 for new replica 6f495d6c-623c-4173-9915-9f1dcf7599eb. |
| | An error occurred communicating with the guest: |
| | lsn attribute missing, bad parent? |
| | Traceback (most recent c... |
| fault_date | 2020-08-20T06:00:14 |
| fault_details | Server type: taskmanager |
| | Traceback (most recent call last): |
| | File "/usr/lib/python2.7/site-packages/trove/taskmanager/manager.py", line 417, in create_instance |
| | locality) |
| | File "/usr/lib/python2.7/site-packages/trove/taskmanager/manager.py", line 382, in _create_instance |
| | backup_id, volume_type, modules) |
| | File "/usr/lib/python2.7/site-packages/trove/taskmanager/manager.py", line 345, in _create_replication_slave |
| | replica_number=replica_number) |
| | File "/usr/lib/python2.7/site-packages/trove/taskmanager/models.py", line 658, in get_replication_master_snapshot |
| | create_fmt_content, err) |
| | File "/usr/lib/python2.7/site-packages/trove/taskmanager/models.py", line 809, in _log_and_raise |
| | raise TroveError(message=full_message) |
| | TroveError: |
| | Error creating replication snapshot from instance cb27dba9-8c85-454a-b57d-326ce7885b07 for new replica 6f495d6c-623c-4173-9915-9f1dcf7599eb. |
| | An error occurred communicating with the guest: |
| | lsn attribute missing, bad parent? |
| | Traceback (most recent call last): |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/oslo_messaging/rpc/server.py", line 165, in _process_incoming |
| | res = self.dispatcher.dispatch(message) |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/oslo_messaging/rpc/dispatcher.py", line 276, in dispatch |
| | return self._do_dispatch(endpoint, method, ctxt, args) |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/oslo_messaging/rpc/dispatcher.py", line 196, in _do_dispatch |
| | result = func(ctxt, **new_args) |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/osprofiler/profiler.py", line 160, in wrapper |
| | result = f(*args, **kwargs) |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/trove/guestagent/datastore/mysql_common/manager.py", line 365, in get_replication_snapshot |
| | context, app, None, snapshot_info) |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/trove/guestagent/strategies/replication/mysql_base.py", line 107, in snapshot_for_replication |
| | incremental_runner=self.repl_incr_backup_runner) |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/trove/guestagent/backup/backupagent.py", line 153, in execute_backup |
| | parent_metadata, extra_opts) |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/trove/guestagent/backup/backupagent.py", line 83, in stream_backup_to_storage |
| | **parent_metadata) as bkup: |
| | |
| | File "/opt/guest-agent-venv/lib/python3.5/site-packages/trove/guestagent/strategies/backup/mysql_impl.py", line 127, in __init__ |
| | raise AttributeError(_('lsn attribute missing, bad parent?')) |
| | |
| | AttributeError: lsn attribute missing, bad parent?
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