Memcached安装配置
操作系统：CentOS release 6.8 (Final)
虚拟机：VM
任务：服务与客户端在一台虚拟机主安装和配置。
Memcached 是一个高性能的分布式内存对象缓存系统，用于动态Web应用以减轻数据库负载。它通过在内存中缓存数据和对象来减少读取数据库的次数，从而提高动态、数据库驱动网站的速度。
Memcached服务安装
[root@localhost ~]# yum install libevent libevent-devel nc -y
[root@localhost ~]# rpm -qa libevent libevent-devel nc
libevent-1.4.13-4.el6.x86_64
libevent-devel-1.4.13-4.el6.x86_64
nc-1.84-24.el6.x86_64
#可以通过yum安装或编译安装，yum安装的版本比较低，可以从官网上下载安装下载最新版本编译安装http://memcached.org/downloads或者http://pecl.php.net/package/memcached
[root@localhost ~]# yum install memcached -y
[root@localhost ~]# which memcached
/usr/bin/memcached
[root@localhost ~]# memcached -m 16m -p 11211 -d -u root -c 8192 #启动第一个实例
[root@localhost ~]# lsof -i:11211 #查看启动情况
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
memcached 1857 root 26u IPv4 14225 0t0 TCP *:memcache (LISTEN)
memcached 1857 root 27u IPv6 14226 0t0 TCP *:memcache (LISTEN)
memcached 1857 root 28u IPv4 14229 0t0 UDP *:memcache
memcached 1857 root 29u IPv6 14230 0t0 UDP *:memcache
[root@localhost ~]# ps -ef|grep memcached|grep -v grep #查看进程
root 1857 1 0 19:14 ? 00:00:00 memcached -m 16m -p 11211 -d -u root -c 8192
[root@localhost ~]# memcached -m 16m -p 11212 -d -u root -c 8192 #启动第二个实例
[root@localhost ~]# ps -ef|grep memcached|grep -v grep
root 1857 1 0 19:14 ? 00:00:00 memcached -m 16m -p 11211 -d -u root -c 8192
root 1868 1 0 19:15 ? 00:00:00 memcached -m 16m -p 11212 -d -u root -c 8192
[root@localhost ~]# lsof -i :11211
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
memcached 1737 root 26u IPv4 12689 0t0 TCP *:memcache (LISTEN)
memcached 1737 root 27u IPv6 12690 0t0 TCP *:memcache (LISTEN)
memcached 1737 root 28u IPv4 12693 0t0 UDP *:memcache
memcached 1737 root 29u IPv6 12694 0t0 UDP *:memcache
[root@localhost ~]# lsof -i :11212
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
memcached 1739 root 26u IPv4 12698 0t0 TCP *:11212 (LISTEN)
memcached 1739 root 27u IPv6 12699 0t0 TCP *:11212 (LISTEN)
memcached 1739 root 28u IPv4 12702 0t0 UDP *:11212
memcached 1739 root 29u IPv6 12703 0t0 UDP *:11212
[root@localhost ~]# tail -2 /etc/rc.local
[root@localhost ~]# vi /etc/rc.local #开机可以自动启动两个实例
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
touch /var/lock/subsys/local
memcached -m 16m -p 11211 -d -u root -c 8192
memcached -m 16m -p 11212 -d -u root -c 8192
------------------------------------------------------------------------
memcached参数说明:
-d选项是启动一个守护进程
-m是分配给Memcache使用的内存数量，单位是MB，我这里是16MB
-u是运行Memcache的用户，我这里是root
-l是监听的服务器IP地址
-p是设置Memcache监听的端口,最好是1024以上的端口
-c选项是最大运行的并发连接数，默认是1024，按照你服务器的负载量来设定
-P是设置保存Memcache的pid文件
其他参数省略说明。
[root@localhost ~]# chkconfig --level 2345 memcached on #开机启动服务
#向memcached中写入数据
[root@localhost ~]# printf "set key1 0 0 6\r\n skyboy\r\n"|nc 127.0.0.1 11211
CLIENT_ERROR bad data chunk
ERROR
[root@localhost ~]# printf "set key1 0 0 6\r\nskyboy\r\n"|nc 127.0.0.1 11211
STORED
[root@localhost ~]# printf "set key2 0 0 5\r\nskyboy\r\n"|nc 127.0.0.1 11211
CLIENT_ERROR bad data chunk
ERROR
[root@localhost ~]# printf "get key1\r\n"|nc 127.0.0.1 11211
VALUE key1 0 6
skyboy
END
[root@localhost ~]# printf "delete key1\r\n"|nc 127.0.0.1 11211
DELETED
[root@localhost ~]# printf "get key1\r\n"|nc 127.0.0.1 11211
END
通过telnet命令写入数据
Connection closed by foreign host.
[root@localhost ~]# telnet 127.0.0.1 11211
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
set user01 0 0 7
oldgirl
STORED
get user01
VALUE user01 0 7
oldgirl
END
delete user01
DELETED
get user01
END
quit
Connection closed by foreign host.
安装Memcached客户端
http://pecl.php.net/package/memcache #下载所有版本地址
[root@localhost tools]#wget http://pecl.php.net/get/memcache-2.2.4.tgz
[root@localhost tools]# tar zxf memcache-2.2.4.tgz
[root@localhost tools]# cd memcache-2.2.4
[root@localhost memcache-2.2.4]#
#phpize是用来扩展PHP扩展模块的，通过phpize可以建立PHP的外挂模块。
[root@localhost memcache-2.2.4]# /application/php/bin/phpize
Configuring for:
PHP Api Version: 20090626
Zend Module Api No: 20090626
Zend Extension Api No: 220090626
[root@localhost memcache-2.2.4]# ./configure --enable-memcache \
--with-php-config=/application/php/bin/php-config
[root@localhost memcache-2.2.4]# make
[root@localhost memcache-2.2.4]# make install
Installing shared extensions: /application/php5.3.27/lib/php/extensions/no-debug-non-zts-20090626/
[root@localhost memcache-2.2.4]# ls /application/php/lib/php/extensions/no-debug-non-zts-20090626/
memcache.so #生成了.so模块
[root@localhost memcache-2.2.4]#cd /application/php/lib/
[root@localhost lib]# vi php.ini #在末尾添加以下两行
extension_dir="/application/php/lib/php/extensions/no-debug-non-zts-20090626/"
extension=memcache.so
[root@localhost lib]# /application/php/sbin/php-fpm -t #检查语法
[19-Jan-2017 19:50:52] NOTICE: configuration file /application/php5.3.27/etc/php-fpm.conf test is successful
[root@localhost lib]# /application/php/sbin/php-fpm #启动服务
[root@localhost lib]# ps -ef|grep php-fpm|grep -v grep
root 4624 1 0 19:51 ? 00:00:00 php-fpm: master process (/application/php5.3.27/etc/php-fpm.conf)
nginx 4625 4624 0 19:51 ? 00:00:00 php-fpm: pool www
nginx 4626 4624 0 19:51 ? 00:00:00 php-fpm: pool www
重启fpm
[root@localhost ~]# pkill php-fpm
[root@localhost ~]# ps -ef|grep php-fpm|grep -v grep
[root@localhost ~]# /application/php/sbin/php-fpm
[root@localhost ~]# ps -ef|grep php-fpm|grep -v grep
root 2186 1 0 23:39 ? 00:00:00 php-fpm: master process (/application/php5.3.27/etc/php-fpm.conf)
nginx 2187 2186 0 23:39 ? 00:00:00 php-fpm: pool www
nginx 2188 2186 0 23:39 ? 00:00:00 php-fpm: pool www
测试Memcached客户端安装是否成功？http://192.168.222.130/phpinfo.php
Phpinfo.php文件内容如下：
Phpinfo();
?>
测试LNMP环境是否连接Memcached服务成功?
[root@localhost www]# vi op_mem.php
$memcache=new memcache;
$memcache->connect('192.168.222.130',11211) or die ("Could not connect Mc Server");
$memcache->set('key','学习Memcached');
$get=$memcache->get('key');
echo $get;
?>
[root@localhost www]# /application/php/bin/php op_mem.php
学习Memcached
或者浏览器访问：http://192.168.222.130/op_mem.php
