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python守护进程 – python-daemon

2020-10-31 75 10/31

python的守护进程模块,遵循PEP 3143,很好很强大!

install

# https://pypi.python.org/pypi/python-daemon/
sudo pip install python-daemon

Usage

import logging
import time
# third party libs
from daemon import runner
class Updater():
    def __init__(self):
        self.stdin_path = '/dev/null'
        self.stdout_path = '/dev/tty'
        self.stderr_path = '/dev/tty'
        self.pidfile_path = '/tmp/testdaemon.pid'
        self.pidfile_timeout = 5
    def run(self):
        while True:
            # Main code goes here ...
            # Note that logger level needs to be set to logging.DEBUG before this shows up in the logs
            logger.debug("Debug message")
            logger.info("Info message")
            logger.warn("Warning message")
            logger.error("Error message")
            time.sleep(10)
app = Updater()
logger = logging.getLogger("DaemonLog")
logger.setLevel(logging.INFO)
formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
handler = logging.FileHandler("/tmp/testdaemon.log")
handler.setFormatter(formatter)
logger.addHandler(handler)
daemon_runner = runner.DaemonRunner(app)
# This ensures that the logger file handle does not get closed during daemonization
daemon_runner.daemon_context.files_preserve = [handler.stream]
daemon_runner.do_action()

Refer:

Create a daemon on Ubuntu
Building a python daemon process
How do you use python-daemon the way that it's documentation dictates?

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