service.py

import logging
import time
import daemon
from daemon import pidfile as pidlockfile
from daemon import runner as rnr
import signal
import setproctitle

# Setting logging configuration
logger = logging.getLogger("MyScript")

logger.setLevel(logging.DEBUG)

formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
handler = logging.FileHandler("/tmp/myscript.log")
handler.setFormatter(formatter)
logger.addHandler(handler)

print(daemon.__file__)

# Rename this process so 'ps' output looks like this is a native
#  executable.  Can not seperate command-line arguments from actual name of
# the executable by NUL bytes, so only show the name of the executable
# instead.  setproctitle.setproctitle("\x00".join(sys.argv))
setproctitle.setproctitle('mitsos.service')

pid = pidlockfile.TimeoutPIDLockFile("/tmp/myscript.pid", 10)

# Remove any stale PID files, left behind by previous invocations
if rnr.is_pidfile_stale(pid):
    logging.warning("Removing stale PID lock file %s", pid.path)
    pid.break_lock()

context = daemon.DaemonContext(
    #working_directory='/var/lib/foo',
    umask=0o002,
    pidfile=pid,
    files_preserve=[handler.stream],
    )

loop = True

def program_cleanup_test():

    logger.info("Stopping loop")
    loop = False

context.signal_map = {
    signal.SIGTERM: program_cleanup_test,
    signal.SIGHUP: 'terminate',
    #signal.SIGUSR1: reload_program_config,
    }

print("Running as a daemon")
with context:
    while loop:
        logger.info("0255")
        time.sleep(5)