carbon-relay

#!/bin/sh

# Initscript for carbon-relay processes
# Jason Dixon <jason@dixongroup.net>
#
# You must set the variables below. The
# INSTANCES variable should be set to the
# number of carbon-relay instances you have
# configured in your carbon.conf. Note that
# they must be numerically indexed from 1.
# (e.g. [relay:1], [relay:2], [relay:3]

PID_DIR=/opt/graphite/storage
DAEMON=/opt/graphite/bin/carbon-relay.py
NAME=carbon-relay
INSTANCES=2

set -e

test -x $DAEMON || exit 0

case "$1" in

  start)
    for INSTANCE in $(seq 1 $INSTANCES); do
      echo -n "Starting ${NAME}-${INSTANCE}: "
      if start-stop-daemon --start --quiet --pidfile "${NAME}-${INSTANCE}.pid" --exec $DAEMON start 1>/dev/null -- --instance=${INSTANCE}
      then
        echo "succeeded"
      else
        echo "failed"
      fi
    done
    ${0} status
    ;;

  stop)
    for INSTANCE in $(seq 1 $INSTANCES); do
      echo -n "Stopping ${NAME}-${INSTANCE}: "
      $DAEMON stop --instance=${INSTANCE} 1>/dev/null
      echo "stopped"
    done
    exit 0
    ;;

  restart)
    ${0} stop
    ${0} start
    ;;

  status)
    for INSTANCE in $(seq 1 $INSTANCES); do
      if [ -f "${PID_DIR}/${NAME}-${INSTANCE}.pid" ]; then

        PID=`cat "${PID_DIR}/${NAME}-${INSTANCE}.pid"`
        echo -n "${NAME}-${INSTANCE} (pid: $PID): "
        if ps -p $PID >/dev/null; then
          echo "running"
        else
          echo "failed"
        fi
      else
        echo "${NAME}-${INSTANCE} not running"
      fi
    done
    for INSTANCE in $(seq 1 $INSTANCES); do
      if [ ! -f "${PID_DIR}/${NAME}-${INSTANCE}.pid" ]; then
        exit 1
      fi
    done
    exit 0
    ;;

  *)
    echo "Usage: /etc/init.d/${NAME} {start|stop|restart|status}" >%2
    exit 1
    ;;

esac

exit 0