nemea-supervisor.in

#!/bin/sh
#
# nemea-supervisor: nemea-supervisor init script
# Copyright (c) 2014 CESNET, z.s.p.o.
# Author(s): Tomas Cejka <cejkat@cesnet.cz>
#            Marek Svepes <svepemar@fit.cvut.cz>
#
# This script is written according to SysV init principles.
#
# To activate this script at the boot time simple copy this file (and
# rename it to 'nemea-supervisor' - without any suffix) into the /etc/rc.d/init.d
# directory. Then run chkconfig:
#
#    chkconfig --add nemea-supervisor
#
# Output is logged in /var/log/nemea-supervisor/ directory.
#
# Two lines below this clause are used by chkconfig(8) to set it to run
# in the boot time. The first of those two lines tells chkconfig what
# runlevels the service should be started in by default, as well as the
# start and stop priority levels. The second line contains a description
# for the service.
#
# chkconfig: 345 50 80
# description: nemea-supervisor startup script

prefix="@prefix@"
exec_prefix="@exec_prefix@"
BINDIR="@bindir@"
CONFIG_FILE="@sysconfdir@/supervisor_config_template.xml"
LOGDIR="/var/log/nemea-supervisor"
LOGFILE="/var/log/nemea-supervisor/init.log"
PID_FILE="@defaultsocketdir@/nemea-supervisor.pid"
SUPERVISOR="$BINDIR/supervisor"
SUPERVISOR_CLI="$BINDIR/supervisor_cli"

#include functions
. /etc/init.d/functions

function get_pid()
{
  echo $(cat "$PID_FILE")
}

function daemon_status()
{
  test -e "$PID_FILE" || return 1
  PID=$(get_pid)
  test -n "$PID" || return 1
  `ps "$PID" > /dev/null 2> /dev/null`
  return $?
}

function logerror()
{
  echo $(date "+%F %T") $1 >> $LOGFILE;
  $2; echo $1;
}

case "$1" in
start )
        test -e "$LOGDIR" || mkdir -p "$LOGDIR" || { echo "Log dir could not be created."; exit 1; }
        test -w "$LOGDIR" || chmod u+w "$LOGDIR" || { echo "Log dir is not writable."; exit 1; }

	echo "== Starting nemea-supervisor ==" >> $LOGFILE
        test -e "$(dirname "$PID_FILE")" || mkdir -p "$(dirname "$PID_FILE")" || {
          logerror "PID file directory could not be created." "failure"
          exit 1
        }
        test -w "$(dirname "$PID_FILE")" || chmod u+w "$(dirname "$PID_FILE")" || {
          logerror "PID file directory is not writable" "failure"
          exit 1
        }

	if daemon_status; then
		logerror "Failed: nemea-supervisor is already running." "failure"
		exit 1;
	fi

        TMPFILE=$(mktemp)
	$SUPERVISOR  --daemon -T "$CONFIG_FILE" -L "$LOGDIR" > "$TMPFILE"
        sed 's/.*PID of daemon process: \([0-9]*\)\./\1/' "$TMPFILE" > "$PID_FILE"
        rm "$TMPFILE"

	# for server to start
	sleep 1;

	if ! daemon_status; then
		logerror "Failure: nemea-supervisor failed to start." "failure"
		exit 1;
	fi

       logerror "Starting nemea-supervisor" "success"
       exit 0;
	;;

stop )
	if ! daemon_status; then
		logerror "Failure: nemea-supervisor is not running." "failure"
		exit 1;
	fi

	kill -15 $(get_pid)

	sleep 3;

	if daemon_status; then
		kill -9 $(get_pid)
		sleep 1;

		if daemon_status; then
			logerror "Failure: nemea-supervisor is still running." "failure"
			exit 1;
		fi
	fi

        # clean up PID file
        rm "$PID_FILE"

        logerror "Success: nemea-supervisor stopped" "success"
	;;

restart )
	$0 stop
	$0 start
	;;

reload )
	$SUPERVISOR_CLI -r
        ;;

status )
	if daemon_status; then
		echo "nemea-supervisor is running.";
                exit 0;
	else
		echo "nemea-supervisor is stopped.";
                exit 2;
	fi
	;;
* )
	# Display usage of this script
	echo "Usage: $0 {start|stop|restart|reload|status}"
	;;
esac