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Lightweight Python module for daemonizing

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succubus

Description

succubus is a lightweight python module for a fast and easy creation of python daemons and init scripts.

Examples

#!/usr/bin/env python

import logging
import sys
import time

from logging.handlers import WatchedFileHandler

from succubus import Daemon


class MyDaemon(Daemon):
    def run(self):
        """Overwrite the run function of the Daemon class"""
        while True:
            time.sleep(1)
            self.logger.warn('Hello world')

    def setup_logging(self):
        # TODO: don't log to /tmp except for example code
        handler = WatchedFileHandler('/tmp/succubus.log')
        self.logger = logging.getLogger('succubus')
        self.logger.addHandler(handler)


def main():
    daemon = MyDaemon(pid_file='succubus.pid')
    sys.exit(daemon.action())


if __name__ == '__main__':
    main()

Succubus implements the usual init script actions (start, stop, restart, status) in Python. So your init script can look like this:

#!/bin/bash
/usr/bin/my_succubus_daemon $1 --foo=42

If the init script is called as /etc/init.d/my_succubus_daemon start, this will translate into /usr/bin/my_succubus_daemon start --foo=42 being called. The start parameter is consumed by the succubus framework, i.e. when your code does the command line parsing, it looks as if /usr/bin/my_succubus_daemon --foo=42 was called. You can now parse the --foo=42 parameter as you please.

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