rattail-fabric/rattail_fabric/deploy/luigid

#!/bin/sh
# -*- coding: utf-8; -*-
################################################################################
#
#  Rattail -- Retail Software Framework
#  Copyright © 2010-2018 Lance Edgar
#
#  This file is part of Rattail.
#
#  Rattail is free software: you can redistribute it and/or modify it under the
#  terms of the GNU General Public License as published by the Free Software
#  Foundation, either version 3 of the License, or (at your option) any later
#  version.
#
#  Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
#  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
#  details.
#
#  You should have received a copy of the GNU General Public License along with
#  Rattail.  If not, see <http://www.gnu.org/licenses/>.
#
################################################################################
#
# Generic 'init' script for Luigi central scheduler (luigid)
#
################################################################################

# "calling" init script may define any of the following as necessary:

NAME=${NAME:-"rattail-luigid"}
SCRIPTNAME=${SCRIPTNAME:-"/etc/init.d/$NAME"}
DESC=${DESC:-"Luigi Scheduler for Rattail"}
DAEMON=${DAEMON:-"/usr/local/bin/luigid"}
PYTHON=${PYTHON:-"/usr/local/bin/python"}
USER=${USER:-"rattail"}
GROUP=${GROUP:-"rattail"}
PIDFILE=${PIDFILE:-"/var/run/rattail/$NAME.pid"}
LOGDIR=${LOGDIR:-"/var/log/rattail/$NAME"}
STATEFILE=${STATEFILE:-"/var/run/rattail/$NAME.pickle"}
ADDRESS=${ADDRESS:-"0.0.0.0"}


create_pid_dir() {
    PIDDIR=`dirname "$PIDFILE"`
    if [ ! -d "$PIDDIR" ]; then
        mkdir --parents "$PIDDIR"
    fi
    chown $USER:$GROUP "$PIDDIR"
}


# Return
#   0 if daemon has been started
#   1 if daemon was already running
#   2 if daemon could not be started
do_start() {

    create_pid_dir

    start-stop-daemon --test --start --exec $DAEMON --user $USER --pidfile $PIDFILE --quiet > /dev/null \
        || return 1
    start-stop-daemon --start --chuid $USER --exec $DAEMON --pidfile $PIDFILE --background --quiet -- \
                      --background --pidfile $PIDFILE --logdir $LOGDIR --state-path $STATEFILE --address $ADDRESS \
        || return 2
}


# 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
do_stop()
{
    start-stop-daemon --test --stop --exec $PYTHON --user $USER --pidfile $PIDFILE --quiet > /dev/null \
        || return 1
    start-stop-daemon --stop --exec $PYTHON --user $USER --pidfile $PIDFILE --quiet > /dev/null \
        || return 2
}


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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        esac
        ;;
    status)
        /usr/local/bin/check-rattail-daemon "$NAME" && exit 0 || exit $?
        ;;
    restart|force-reload)
        log_daemon_msg "Restarting $DESC" "$NAME"
        do_stop
        case "$?" in
            0|1)
                do_start
                case "$?" in
                    0) log_end_msg 0 ;;
                    1) log_end_msg 1 ;; # Old process is still running
                    *) log_end_msg 1 ;; # Failed to start
                esac
                ;;
            *)
                # Failed to stop
                log_end_msg 1
                ;;
        esac
        ;;
    *)
        echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
        exit 3
        ;;
esac

: