init.sh.tmpl

#!/bin/sh
### BEGIN INIT INFO
# Provides:          {{.ServiceName}}
# Required-Start:    $local_fs $network $syslog
# Required-Stop:     $local_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: {{.Description}}
# Description:       {{.BeatName | title}} is a shipper part of the Elastic Beats
#                    family. Please see: https://www.elastic.co/products/beats
### END INIT INFO

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="{{.Description}}"
NAME="{{.BeatName}}"
DAEMON=/usr/share/${NAME}/bin/${NAME}
DAEMON_ARGS="-c /etc/${NAME}/${NAME}.yml --path.home /usr/share/${NAME} --path.config /etc/${NAME} --path.data /var/lib/${NAME} --path.logs /var/log/${NAME}"
TEST_ARGS="-e test config"
PIDFILE=/var/run/{{.ServiceName}}.pid
WRAPPER="/usr/share/${NAME}/bin/${NAME}-god"
BEAT_USER="{{.BeatUser}}"
WRAPPER_ARGS="-r / -n -p $PIDFILE"
SCRIPTNAME=/etc/init.d/{{.ServiceName}}

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# Read configuration variable file if it is present
[ -r /etc/default/{{.ServiceName}} ] && . /etc/default/{{.ServiceName}}

[ "$BEAT_USER" != "root" ] && WRAPPER_ARGS="$WRAPPER_ARGS -u $BEAT_USER"
USER_WRAPPER="su"
USER_WRAPPER_ARGS="$BEAT_USER -c"

if command -v runuser >/dev/null 2>&1; then
    USER_WRAPPER="runuser"
fi

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

#
# Function that calls runs the service in foreground
# to test its configuration.
#
do_test()
{
        $USER_WRAPPER $USER_WRAPPER_ARGS "$DAEMON $DAEMON_ARGS $TEST_ARGS"
}

#
# Function that starts the daemon/service
#
do_start()
{
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	start-stop-daemon --start \
                --pidfile $PIDFILE  \
		--exec $WRAPPER -- $WRAPPER_ARGS -- $DAEMON $DAEMON_ARGS \
		|| return 2
}

#
# Function that stops the daemon/service
#
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/5/KILL/5 --pidfile $PIDFILE --exec $WRAPPER
	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
	[ "$?" = 2 ] && return 2
	# Many daemons don't delete their pidfiles when they exit.
	rm -f $PIDFILE
	return "$RETVAL"
}

#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
	#
	# If the daemon can reload its configuration without
	# restarting (for example, when it is sent a SIGHUP),
	# then implement that here.
	#
	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --exec $DAEMON
	return 0
}

case "$1" in
  start)
	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
        do_test
        case "$?" in
                0) ;;
                *)
                        log_end_msg 1
                        exit 1
                        ;;
        esac
	do_start
	case "$?" 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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
       status_of_proc "$WRAPPER" "$NAME" && exit 0 || exit $?
       ;;
  #reload|force-reload)
	#
	# If do_reload() is not implemented then leave this commented out
	# and leave 'force-reload' as an alias for 'restart'.
	#
	#log_daemon_msg "Reloading $DESC" "$NAME"
	#do_reload
	#log_end_msg $?
	#;;
  restart|force-reload)
	#
	# If the "reload" option is implemented then remove the
	# 'force-reload' alias
	#
	log_daemon_msg "Restarting $DESC" "$NAME"
        do_test
        case "$?" in
                0) ;;
                *)
                        log_end_msg 1  # Old process is still running
                        exit 1
                        ;;
        esac

	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|restart|reload|force-reload}" >&2
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
	exit 3
	;;
esac

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