Percona Xtrabackup 8.0失败，显示错误“Xtrabackup:error:未知参数：'/var/lib/mysql/data'”

Question

我正在使用Openstack Trove创建和管理带有Percona Xtrabackup 8.0的备份mysql8。你知道吗

在尝试为数据库创建备份时，遇到以下问题：备份失败，因为Xtrabackup有一个未知参数。你知道吗

其他的一切对我来说都很好，所以我不明白怎么了。有人有这个问题或者可以解释一下吗？非常感谢！日志如下：

2020-01-03 03:04:31.313 1259 DEBUG trove.guestagent.strategies.backup.mysql_impl [-] xtrabackup: recognized server arguments: --datadir=/var/lib/mysql/data --tmpdir=/var/tmp --innodb_data_file_path=ibdata1:10M:autoextend --innodb_buffer_pool_size=600M --innodb_file_per_table=1 --innodb_log_files_in_group=2 --innodb_log_file_size=50M --innodb_log_buffer_size=25M --open_files_limit=2048 --server-id=1975412137
xtrabackup: recognized client arguments: --port=3306 --socket=/var/run/mysqld/mysqld.sock --user=os_admin --password=* --host=127.0.0.1 --stream=xbstream --user=os_admin --password=* --host=127.0.0.1
xtrabackup: Error: unknown argument: '/var/lib/mysql/data'
 check_process /opt/guest-agent-venv/lib/python3.5/site-packages/trove/guestagent/strategies/backup/mysql_impl.py:94
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.strategies.backup.mysql_impl [-] Xtrabackup did not complete successfully.
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.backup.backupagent [-] Error saving backup: e6b8729e-7646-4e25-8e58-49e49eab81a4.: trove.guestagent.strategies.backup.base.BackupError
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.backup.backupagent Traceback (most recent call last):
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.backup.backupagent   File "/opt/guest-agent-venv/lib/python3.5/site-packages/trove/guestagent/backup/backupagent.py", line 114, in stream_backup_to_storage
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.backup.backupagent     return meta
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.backup.backupagent   File "/opt/guest-agent-venv/lib/python3.5/site-packages/trove/guestagent/strategies/backup/base.py", line 96, in __exit__
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.backup.backupagent     raise BackupError
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.backup.backupagent trove.guestagent.strategies.backup.base.BackupError
2020-01-03 03:04:31.314 1259 ERROR trove.guestagent.backup.backupagent