socket_log_receiver is a light-weight socket log receiving server. The server aggregates messages from multi-process applications via a socket and logs them to a single file. The service is used with Python's stdlib logging package, which by default does not support multi-process writes to a single file.

$ pip install socket-log-receiver

The receiver service should be run as a service:

$ python -m socket_log_receiver  # as a module
$ log_receiver                   # as a command-line program

These are equivalent.

By default, the receiver service starts listening on localhost:9020. These can be changed through CLI options; see the Help section below.

In the application, use SocketHandler to send logs to the receiver service.

from logging.handlers import SocketHandler

handler = SocketHandler('localhost', 9020)  # handler to send logs to localhost:9020
logging.root.addHandler(handler)            # add the socket handler to the root logger

This way, the root logger sends logging messages to the receiver service.

$ python -m socket_log_receiver -h
$ log_receiver -h

The receiver service's configuration is managed by resconfig. By default, the dynamic configuration update is trigged by SIGHUP. Some systems might not make this signal available, in which case you could use a different signal for the trigger using the command-line option, e.g.

$ log_receiver --reloader-signal SIGUSR2

$ pip install -e .[dev]
$ pre-commit install

$ pip install -e .[test]
$ pytest