- 1 year ago
How can I get loguru's logger to work while running a Python program as a Windows service with NSSM?
When running a Python program as a Windows service using NSSM (Non-Sucking Service Manager), you may encounter issues with the logging module used by the program, including loguru. This is because NSSM redirects the standard output and error streams of the service to its own logging system, rather than allowing the program to log directly to the console or a log file.
To make loguru's logger work properly with NSSM, you can use the StreamHandler
class to redirect log output to the service's standard output stream. Here's an example:
pythonimport sys
from loguru import logger
# Redirect log output to the standard output stream
logger.remove()
logger.add(sys.stdout, format="{time} {level} {message}", colorize=True)
# Your program code here...
In this example, we first remove any existing log handlers from the logger using the remove
method, and then add a new StreamHandler
instance that writes log messages to sys.stdout
. We also specify a custom log message format and enable colorization for the output.
You can then use the logger
object to log messages throughout your program as usual, and the log output will be redirected to the standard output stream, which NSSM will capture and write to its own logging system.
Note that this approach may not work well with log rotation, as the standard output stream is not a file that can be rotated. You may want to consider using a file-based log handler instead if log rotation is a requirement for your service.