I've written a custom python daemon that runs as a service via an init.d script on ubuntu 14.04. Starting the service works fine, but when I try to do "service monitor stop", the daemon is not terminated. I'm using pyinotify to daemonize a file watcher for changes.
Within the init.d script:
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Monitor files"
NAME=monitor
DAEMON=/usr/bin/python
DAEMON_ARGS="/home/user/python/monitor.py"
PIDFILE=/home/user/logs/monitor.pid
LOGFILE=/home/user/logs/monitor.log
SCRIPTNAME=/etc/init.d/$NAME
...
do_stop()
{
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
RETVAL="$?"
# Many daemons don't delete their pidfiles when they exit.
rm -f $PIDFILE
return "$RETVAL"
echo "done"
}
...
case "$1" in
start)
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
do_start
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
stop)
[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
do_stop
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
...
To ensure the daemon handles SIGERM properly, I can run it by hand:
bash$ /usr/bin/python /home/user/python/monitor.py
bash$ kill -Term PID
The daemon successfully handles the SIGTERM and exits properly.
I can't seem to figure out why it doesn't handle it when I do "service monitor stop" though.
Check that the process $NAME
is correct, as delivered to the start-stop-daemon --stop
command. I just encountered this issue because a process I was running ended up getting a different name whenever it forked its daemon. Try running this to see the process command name:
ps -o comm= $(cat /home/user/logs/monitor.pid)
I bet yours outputs this (instead of monitor
):
python
Then change your stop command to look like this, where you substitute python
in place of $NAME
:
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name python