memcached-multi, a RHEL6 initscript with support for easily managing multiple memcached services

memcached-multi.init

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

# Based on https://gist.github.com/lboynton/3775818
# Usage:
# cp /etc/sysconfig/memcached /etc/sysconfig/memcached-server1
# cp /etc/sysconfig/memcached.conf /etc/sysconfig/memcached-server2
# start all instances:
# /etc/init.d/memcached-multi start
# start one instance:
# /etc/init.d/memcached-multi start server1
# stop all instances:
# /etc/init.d/memcached-multi stop
# stop one instance:
# /etc/init.d/memcached-multi stop server1

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

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

# Check that networking is up.
if [ "$NETWORKING" = "no" ]
then
    exit 0
fi

prog="memcached"
FILES=(/etc/sysconfig/$prog-*)
if [ -r "${FILES[0]}" ]; then
  CONFIGS=()
  for FILE in "${FILES[@]}"; do
    # remove prefix
    NAME=${FILE#/etc/sysconfig/}
    # remove suffix
    NAME=${NAME%.conf}
    NAME=${NAME#$prog-}

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

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

CONFIG_NUM=${#CONFIGS[@]}
for ((i=0; i < $CONFIG_NUM; i++)); do
  NAME=${CONFIGS[${i}]}
# start loop

if [ -f "/etc/sysconfig/memcached-$NAME.conf" ];then
  . "/etc/sysconfig/memcached-$NAME.conf"
fi

pidfile=${PIDFILE-/var/run/memcached/memcached-$NAME.pid}
lockfile=${LOCKFILE-/var/lock/subsys/memcached-$NAME}

start () {
  echo -n $"Starting $prog ($NAME): "
  # Ensure that $pidfile directory has proper permissions and exists
  piddir=`dirname $pidfile`
  if [ ! -d $piddir ]; then
    mkdir $piddir
  fi
  if [ "`stat -c %U $piddir`" != "$USER" ]; then
    chown $USER $piddir
  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 $prog ($NAME): "
  killproc -p ${pidfile} /usr/bin/memcached
  RETVAL=$?
  echo
  if [ $RETVAL -eq 0 ] ; then
    rm -f ${lockfile} ${pidfile}
  fi
}

restart () {
        stop
        start
}


# See how we were called.
case "$1" in
  start)
  start
  ;;
  stop)
  stop
  ;;
  status)
  status -p ${pidfile} memcached-$NAME
  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}"
  RETVAL=2
        ;;
esac

# end loop
done;

exit $?