If the database is not reachable, seafile-server logs are misleading

[christophdb]

How to reproduce:

install seafile and mariadb and make a mistake with DB_HOST. Then execute docker logs seafile-server. You will see as last entry:

2024-10-30 12:36:37 Reloading NGINX... 

This is misleading. There should be a log entry like: Try to connect to database...

[simonhammes]

This is caused by buffered I/O. It actually prints waiting for mysql server to be ready (https://github.com/haiwen/seafile-docker/blob/b5967dedf16acde7aa6feddb3dbd54f89162db6c/scripts/scripts_11.0/utils.py#L290), but the output is buffered.

2 solutions:

• Set PYTHONUNBUFFERED=1 to disable buffered I/O
• Copy utils.py into this repository and use print('...', flush=True) to immediately flush (utils.py is imported by setup-databases.py)