memcached安装

• 安装memcached依赖libevent
  1. libevent 简介

       libevent是为了取代事件循环发现在事件驱动的网络服务器。一个应用程序只需要调用event_dispatch(),然后添加或删除事件动态而无需更改事件循环。
       libevent 与memcached 的关系？
       libevent 下载地址：https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz
     

  2. libevent 安装

       wget https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz
       tar zxvf libevent-2.0.21-stable.tar.gz
       cd libevent-2.0.21-stable
       ./configure --prefix=/usr
       make&make install
     

  3. 输入以下命令，查看是否有目录列出（检查是否安装成功)

       ls -al /usr/lib | grep libevent
     

• 安装memcached

  wget  http://memcached.googlecode.com/files/memcached-1.4.15.tar.gz
  tar zxvf memcached-1.4.15.tar.gz
  cd memcached-1.4.15
  ./configure --with-libevent=/usr
  make && make install
  

• 编译安装php下的memcache扩展
  1. 下载扩展包

        wget http://pecl.php.net/get/memcache-2.2.7.tgz
     

  2. 编译并安装

         tar vxzf memcache-2.2.7.tgz
         cd memcache-2.2.7
         /usr/local/webserver/php/bin/phpize
         ./configure --enable-memcache --with-php-config=/usr/local/webserver/php/bin/php-config
         make&make install
     

  3. 安装成功的标志(扩展库存放路径)

     /usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20090626/
     

     
     

  4. 配置php.ini
     • 查找“extension_dir”，修改为如下代码：

            extension_dir='/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20090626/'
       

     • 查找“extension”，任意地方添加如下代码：

            extension=memcache.so
       

• 配置启动脚本

  #! /bin/sh
  #
  # chkconfig: - 55 45
  # description:  The memcached daemon is a network memory cache service.
  # processname: memcached
  # config: /etc/sysconfig/memcached
  
  # Source function library.
  . /etc/rc.d/init.d/functions
  
  PORT=11211
  USER=root
  MAXCONN=1024
  CACHESIZE=64
  OPTIONS=""
  PID="/tmp/memcached.pid"
  HOST="127.0.0.1"
  PREFIX=/usr/local/bin/memcached
  
  if [ -f /etc/sysconfig/memcached ];then
      . /etc/sysconfig/memcached
  fi
  
  # Check that networking is up.
  if [ "$NETWORKING" = "no" ]
  then
      exit 0
  fi
  
  RETVAL=0
  
  start () {
      echo "Starting memcached ..."
      # insure that /var/run/memcached has proper permissions
      chown $USER $PREFIX
      $PREFIX -d -l $HOST -p $PORT -u $USER -m $CACHESIZE -c $MAXCONN -P $PID $OPTIONS
      RETVAL=$?
      [ $RETVAL -eq 0 ] && touch /var/lock/subsys/memcached
  }
  stop () {
      echo "Stopping memcached ..."
      kill `cat /tmp/memcached.pid`
      RETVAL=$?
      if [ $RETVAL -eq 0 ] ; then
          rm -f /var/lock/subsys/memcached
          rm -f $PID
      fi
  }
  restart () {
      stop
      start
  }
  
  
  # See how we were called.
  case "$1" in
      start)
          start
          ;;
      stop)
      stop
      ;;
      status)
      status memcached
      ;;
      restart|reload)
      restart
      ;;
      condrestart)
      [ -f /var/lock/subsys/memcached ] && restart || :
      ;;
      *)
      echo $"Usage: $0 {start|stop|status|restart|reload|condrestart}"
      exit 1
  esac
  
  exit $?
  

• 添加为开机启动

  chkconfig --add memcached