[Errno 30] Read-only file system ONLY with one service

Troubleshooting
1

Hi, I’ve been using bazarr for quite a long time without issues and decided to add a post-script that for some reason, insists in giving this error:

File "/opt/subcleaner/subcleaner.py", line 10, in <module> from libs.subcleaner import main 
File "/opt/subcleaner/libs/subcleaner/main.py", line 4, in <module> from .subtitle import Subtitle, ParsingException, FileContentException 
File "/opt/subcleaner/libs/subcleaner/subtitle.py", line 6, in <module> from .settings import args, config 
File "/opt/subcleaner/libs/subcleaner/settings/__init__.py", line 3, in <module> from . import log_config 
File "/opt/subcleaner/libs/subcleaner/settings/log_config.py", line 15, in <module> file_handler = logging.handlers.RotatingFileHandler(config.log_file, maxBytes=10_000_000, backupCount=10, encoding='utf8') 
File "/usr/lib/python3.9/logging/handlers.py", line 153, in __init__ BaseRotatingHandler.__init__(self, filename, mode, encoding=encoding, 
File "/usr/lib/python3.9/logging/handlers.py", line 58, in __init__ logging.FileHandler.__init__(self, filename, mode=mode, 
File "/usr/lib/python3.9/logging/__init__.py", line 1142, in __init__ StreamHandler.__init__(self, self._open()) 
File "/usr/lib/python3.9/logging/__init__.py", line 1171, in _open return open(self.baseFilename, self.mode, encoding=self.encoding, 
OSError: [Errno 30] Read-only file system: '/opt/subcleaner/logs/subcleaner.log'

Already gave 777 permissions and chown to bazarr to all this “subcleaner” folder and subfolders. But issue persists.

If I run the script from the CLI it works perfectly, the problem is when is run by bazarr itself. I’m out of ideas.

2

If I remove this block from the script source code, it works:

# file handler
# if not args.no_log:
#     file_handler = logging.handlers.RotatingFileHandler(config.log_file, maxBytes=10_000_000, backupCount=10, encoding='utf8')
#     file_handler.setFormatter(time_formatter)
#     file_handler.setLevel(logging.INFO)
#     if args.errors_only:
#         file_handler.setLevel(logging.ERROR)
#     base_logger.addHandler(file_handler)

Specially the line with the logging.handlers.RotatingFileHandler seems ti be the issue.

Looks like it can’t open a file to write within this location but only when ran by the service.

3

It depends on the user who is executing the service. This one would need read permissions on all folders along the chain /opt/subcleaner/logs/. Best to check all of them

4

Apparently is the service that is actually running that has permissions:

drwxrwsrwx 2 bazarr dietpi 4096 Mar 26 14:04 .
drwxrwsrwx 7 bazarr dietpi 4096 Mar 26 14:09 ..
-rwxrwxrwx 1 bazarr dietpi    0 Mar 26 14:04 subcleaner.log

Bazarr is the service that is running and trying to access it.

5

you need to check all folders (/opt/subcleaner/logs/) individually not just ./logs

6

Actually just execute permissions for all parent dirs.

But IIRC we restrict filesystem access for Bazarr systemd unit-wise to /opt/bazarr /mnt/dietpi_userdata/bazarr and maybe /var/log/bazarr. Check via:

systemctl cat bazarr

Via dietpi-services or systemctl edit bazarr you can edit/override the ReadWritePaths line to add the dir where the post processing script needs to write to.

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