initi.d script to start supervisord on amazon linux

supervisord.sh

#!/bin/bash
#
# supervisord   This scripts turns supervisord on
#
# Author:       Mike McGrath <[email protected]> (based off yumupdatesd)
#               Jason Koppe <[email protected]> adjusted to read sysconfig,
#                   use supervisord tools to start/stop, conditionally wait
#                   for child processes to shutdown, and startup later
#               Mikhail Mingalev <[email protected]> Merged
#                   redhat-init-jkoppe and redhat-sysconfig-jkoppe, and
#                   made the script "simple customizable".
#               Brendan Maguire <[email protected]> Added OPTIONS to
#                   SUPERVISORCTL status call
#
# chkconfig:    345 83 04
#
# description:  supervisor is a process control utility.  It has a web based
#               xmlrpc interface as well as a few other nifty features.
#               Script was originally written by Jason Koppe <[email protected]>.
#
# Install supervisord using "easy_install supervisor"

# source function library
. /etc/rc.d/init.d/functions

set -a

PREFIX=/usr/local

SUPERVISORD=$PREFIX/bin/supervisord
SUPERVISORCTL=$PREFIX/bin/supervisorctl

PIDFILE=/var/run/supervisord.pid
LOCKFILE=/var/lock/subsys/supervisord

OPTIONS="-c /etc/supervisord.conf"

# unset this variable if you don't care to wait for child processes to shutdown before removing the $LOCKFILE-lock
WAIT_FOR_SUBPROCESSES=yes

# remove this if you manage number of open files in some other fashion
ulimit -n 96000

RETVAL=0


running_pid()
{
    # Check if a given process pid's cmdline matches a given name
    pid=$1
    name=$2
    [ -z "$pid" ] && return 1
    [ ! -d /proc/$pid ] && return 1
    (cat /proc/$pid/cmdline | tr "\000" "\n"|grep -q $name) || return 1
    return 0
}

running()
{
# Check if the process is running looking at /proc
# (works for all users)

    # No pidfile, probably no daemon present
    [ ! -f "$PIDFILE" ] && return 1
    # Obtain the pid and check it against the binary name
    pid=`cat $PIDFILE`
    running_pid $pid $SUPERVISORD || return 1
    return 0
}

start() {
        echo "Starting supervisord: "

        if [ -e $PIDFILE ]; then
		echo "ALREADY STARTED"
		return 1
	fi

	# start supervisord with options from sysconfig (stuff like -c)
        $SUPERVISORD $OPTIONS -j $PIDFILE

	# show initial startup status
	$SUPERVISORCTL $OPTIONS status

	# only create the subsyslock if we created the PIDFILE
        [ -e $PIDFILE ] && touch $LOCKFILE
}

stop() {
        echo -n "Stopping supervisord: "
        $SUPERVISORCTL $OPTIONS shutdown
        # always remove the subsys. We might have waited a while, but just remove it at this point.
        rm -f $LOCKFILE
}

restart() {
	kill -HUP `cat $PIDFILE`
}

case "$1" in
    start)
        start
        RETVAL=$?
        ;;
    stop)
        stop
        RETVAL=$?
        ;;
    restart|force-reload)
        restart
        RETVAL=$?
        ;;
    reload)
        $SUPERVISORCTL $OPTIONS reload
        RETVAL=$?
        ;;
    condrestart)
        [ -f $LOCKFILE ] && restart
        RETVAL=$?
        ;;
    status)
        $SUPERVISORCTL $OPTIONS status
        if running ; then
            RETVAL=0
        else
            RETVAL=1
        fi
        ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart}"
        exit 1
esac

exit $RETVAL