执行：

mlflow ui --backend-store-uri sqlite:////mlflow/mlflow.db --default-artifact-root /mlflow/artifacts --host 0.0.0.0 --port 50004

报错：

2021/12/15 11:23:01 WARNING mlflow.store.db.utils: SQLAlchemy engine could not be created. The following exception is caught.
(sqlite3.OperationalError) unable to open database file

解决：

shell
mkdir -p /mlflow/artifacts