Python script as daemon in ubuntu

Question

I created a daemon to run a python script. but it stops whenever i logout from my ubuntu machine.

DAEMON=sudo python /var/www/some_dir/my_python.py
ARGS=/var/www/some_dir/my_python.py
PIDFILE=/var/www/some_dir/my_python.pid

test -x $DAEMON || exit 0

#set -e

case "$1" in
start)
    echo -n "Starting $DESC: "
    start-stop-daemon --start --pidfile $PIDFILE --exec $DAEMON &
    echo "$NAME."
    ;;
stop)
    echo -n "Stopping $DESC: "
    start-stop-daemon --stop --pidfile $PIFDILE --exec $DAEMON
    echo "$NAME."
    ;;
restart|force-reload)
    echo -n "Restarting $DESC: "
    start-stop-daemon --stop --pidfile $PIDFILE --exec $DAEMON
    sleep 1
    start-stop-daemon --start --pidfile $PIDFILE --exec $DAEMON &
    echo "$NAME."
    ;;
*)
    N=/etc/init.d/$NAME
    echo "Usage: $N {start|stop|restart|force-reload}" >&2
    exit 1
    ;;
esac
exit 0

can anyone tell me how can i do it.

Answer 1

It's a long time since this question was asked, but I came across this situation today.

To start the process in the background, use

start-stop-daemon -Sbm --pidfile $PIDFILE --exec $DAEMON

To stop it:

start-stop-daemon -K --pidfile $PIDFILE

From the start-stop-daemon man page :

-b , -background

Force the daemon into the background. Some daemons don't create pidfiles, so a good trick is to get the daemon to run in the foreground, and use the this option along with -m , -make-pidfile to create a working pidfile. -m , -make-pidfile

Saves the pid of the daemon in the file specified by the -p, -pidfile option. Only useful when used with daemons that run in the foreground and forced into the background with the --b, -background option.

Answer 2

Try to remove & from your start-stop-daemon invocations. Also, you should read how to write proer initscripts because there are several other errors in your initscript.