CentOS memcached init script with multiple instance support

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/memcached.conf /etc/memcached_server1.conf
# cp /etc/memcached.conf /etc/memcached_server2.conf
# 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
# There is no "status" command.

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

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/bin/memcached
DAEMONNAME=memcached
DAEMONBOOTSTRAP=/usr/bin/start-memcached
DESC=memcached

test -x $DAEMON || exit 0
test -x $DAEMONBOOTSTRAP || exit 0

set -e

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

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

    # 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
    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[${i}]}
  PIDFILE="/var/run/${NAME}.pid"

RETVAL=0

start () {
    echo -n "Starting $DESC: "
    $DAEMONBOOTSTRAP /etc/${NAME}.conf $PIDFILE
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && touch /var/lock/subsys/memcached
}
stop () {
    echo -n "Stopping $DESC: "
    killproc -p $PIDFILE /usr/bin/memcached
    RETVAL=$?
    echo
    if [ $RETVAL -eq 0 ] ; then
        rm -f /var/lock/subsys/memcached
        rm -f $PIDFILE
    fi
}

restart () {
    stop
    start
}


# See how we were called.
case "$1" in
    start)
        start
        ;;
    stop)
    stop
    ;;
    restart|reload)
    restart
    ;;
    condrestart)
    [ -f /var/lock/subsys/memcached ] && restart || :
    ;;
    *)
    echo $"Usage: $0 {start|stop|restart|reload|condrestart}"
    exit 1
esac
done;

exit $?

If you need to manage pools separately, it's better to make a copy of original init script and modify it to point to a new configuration/pid.

That way you can chkconfig/bounce them as a separate entity.

That is what this is supposed to avoid, to make it easier to add new instances without copy/paste fail.