memcached-init.sh

#!/bin/bash
#
# chkconfig: - 55 45
# description:  The memcached daemon is a network memory cache service.
# processname: memcached
### END INIT INFO

# Usage:
# cp /etc/sysconfig/memcached /etc/sysconfig/memcached_server1
# cp /etc/sysconfig/memcached /etc/sysconfig/memcached_server2
# start all instances:
# /etc/init.d/memcached start
# start one instance:
# /etc/init.d/memcached start server1
# stop all instances:
# /etc/init.d/memcached stop
# stop one instance:
# /etc/init.d/memcached stop server1

# Source function library.
. /etc/init.d/functions

if [ -f /etc/sysconfig/memcached ]
then
  . /etc/sysconfig/memcached
fi

# Check that networking is up.
. /etc/sysconfig/network

if [ "$NETWORKING" = "no" ]
then
  exit 0
fi

RETVAL=0
RETVALTOTAL=0

start () {
  echo -n $"Starting $prog: "
  # Ensure that /var/run/memcached has proper permissions
  if [ "`stat -c %U /var/run/memcached`" != "$USER" ]; then
    chown $USER /var/run/memcached
  fi

  daemon --pidfile ${pidfile} memcached -d -p $PORT -u $USER  -m $CACHESIZE -c $MAXCONN -P ${pidfile} $OPTIONS
  RETVAL=$?
  echo
  [ $RETVAL -eq 0 ] && touch ${lockfile}
}

stop () {
  echo -n $"Stopping $prog: "
  killproc -p ${pidfile} /usr/bin/memcached
  RETVAL=$?
  echo
  if [ $RETVAL -eq 0 ]
  then
    rm -f ${lockfile} ${pidfile}
  fi
}

restart () {
  stop
  start
}

FILES=(/etc/sysconfig/memcached_*)
# check for alternative config schema
if [ -r "${FILES[0]}" ]
then
  CONFIGS=()
  for FILE in "${FILES[@]}"
  do
    # remove prefix
    NAME=${FILE#/etc/sysconfig/}

    # check optional second param
    if [ $# -ne 2 ]
    then
      # add to config array
      CONFIGS+=($NAME)
    elif [ "memcached_$2" == "$NAME" ]
    then
      # use only one memcached
      CONFIGS=($NAME)
      break
    fi
  done

  if [ ${#CONFIGS[@]} == 0 ]
  then
    NAME=${2-memcached}
    echo "Config not exist for: $NAME" >&2
    exit 1
  fi
else
  CONFIGS=(memcached)
fi

CONFIG_NUM=${#CONFIGS[@]}
for ((i=0; i < $CONFIG_NUM; i++))
do
  # Resetting defaults so that a config file with missing parameters won't 
  # inherit the parameters of the previous instance
  PORT=11211
  USER=memcached
  MAXCONN=1024
  CACHESIZE=64
  OPTIONS=""

  NAME=${CONFIGS[${i}]}
  prog=${CONFIGS[${i}]}
  pidfile="/var/run/memcached/${NAME}.pid"
  lockfile="/var/lock/subsys/${NAME}"
  RETVAL=0
  . /etc/sysconfig/${NAME}

  # See how we were called.
  case "$1" in
    start)
      start
      ;;
    stop)
      stop
      ;;
    status)
      status -p ${pidfile} ${prog}
      RETVAL=$?
      ;;
    restart|reload|force-reload)
      restart
      ;;
    condrestart|try-restart)
      [ -f ${lockfile} ] && restart || :
      ;;
    *)
      echo $"Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart|try-restart} [instance]"
      RETVAL=2
      exit 1
  esac
  [ $RETVAL -eq 0 ] || RETVALTOTAL=$RETVAL
done

exit $RETVALTOTAL