graphite megacarbon init.d script for Debian, see http://blog.sweetiq.com/2013/01/carbon-daemon-writer-setup-in-megacarbon/ for more details

carbon-daemon

#!/bin/bash
### BEGIN INIT INFO
# Provides:          carbon-daemon
# Required-Start:    $remote_fs
# Required-Stop:     $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Graphite backend daemon
# Description:       backend data caching and persistence daemon for Graphite
### END INIT INFO

# sudo cp -v carbon-daemon /etc/init.d/carbon-daemon
# Author: Ilya Zakreuski <[email protected]>
# Rewrited for megacarbon carbon-daemon: Eugene Klimov <[email protected]>


PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Graphite backend daemon"
NAME=carbon-daemon
GRAPHITE_DIR=/opt/graphite
DAEMON=$GRAPHITE_DIR/bin/$NAME.py
PIDFILE=/var/run/$NAME/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

export GRAPHITE_DIR=$GRAPHITE_DIR

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

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

DAEMON_ARGS=""

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

VERBOSE=on

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

# Create carbon-cache dir in /var/run if does not exist
[ -d "/var/run/$NAME" ] || mkdir /var/run/$NAME \
    && chown www-data:www-data /var/run/$NAME

# Create log dir in /var/log if does not exist
[ -d "/var/log/carbon" ] || mkdir /var/log/carbon \
    && chown www-data:www-data /var/log/carbon

#
# 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 --startas $NAME --pidfile $PIDFILE --test > /dev/null || return 1
        start-stop-daemon --start --exec $DAEMON --name $NAME --chuid www-data -- --pidfile $PIDFILE writer start || 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 --retry=TERM/10/KILL/5 --pidfile $PIDFILE
        RETVAL="$?"
        [ "$RETVAL" = 2 ] && return 2
        # Wait for children to finish too if this is a daemon that forks
        start-stop-daemon --quiet --stop --oknodo --retry=0/10/KILL/5 --pidfile $PIDFILE
        [ "$?" = 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() {
        start-stop-daemon --stop --signal 1 --pidfile $PIDFILE --name $NAME
        return 0
}

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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        esac
        ;;
  status)
       status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
       ;;
  reload|force-reload)
        log_daemon_msg "Reloading $DESC" "$NAME"
        do_reload
        log_end_msg $?
        ;;
  restart)
        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|reload|force-reload}" >&2
        exit 3
        ;;
esac

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