This is a small toolkit for solving unsafe python mutliprocess logging (file logging and rotation)

Only for Python 3.5+

pip install mp-socket-logging

                            (child process)
                           +---------------+
             +<------------+     client    |
 +-------+-+-+             +---------------+
 |           |              (child process)
 +  Socket   |             +---------------+
 |           +<------------+     client    |
 +---------+-+             +---------------+
       |
       |                 (main process)
       |               +---------------+          +--------------+
       +-------------->+     server    +--------->+   log file   +
                       +---------------+          +--------------+

• The package uses unix socket for communication between processes.
• I/O operations will all be done by server in main process.
• Client Class itself is a logging.Handler which will be added to user's logger inside child process. Client handler will do the formatting and sending the logs to server side through socket.
• Inside child process, user can do logging as normal with the logger.

• start a server before in the main process

server_handler = ServerHandler(LOG_FILE, maxBytes=MAX_BYTES)
server_handler.setLevel(logging.INFO)
server = Server(server_handler, batch_size=BATCH_SIZE)
server.start()

• register the client to your logger inside multiprocessing worker for sending logs to server through socket
• you can define your own formatter to add to the handler (otherwise a default formatter will be used)

client_logger = logging.getLogger("client_logger")
formatter = logging.Formatter(
    "%(asctime)s - %(name)s - %(filename)s- [%(levelname)s]: %(message)s"
)
register_handler(client_logger, logging_level=logging.INFO, formatter=formatter)
client_logger.setLevel(logging.INFO)