Memcached安裝配置

操作系統：CentOS release 6.8 (Final)

虛擬機：VM

任務：服務與客戶端在一臺虛擬機主安裝和配置。

Memcached 是一個高性能的分布式內存對象緩存系統，用于動態Web應用以減輕數據庫負載。它通過在內存中緩存數據和對象來減少讀取數據庫的次數，從而提高動態、數據庫驅動網站的速度。

Memcached服務安裝

[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

#可以通過yum安裝或編譯安裝，yum安裝的版本比較低，可以從官網上下載安裝下載最新版本編譯安裝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 #啟動第一個實例

[root@localhost ~]# lsof -i:11211  #查看啟動情況

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  #查看進程

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  #啟動第二個實例

[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  #開機可以自動啟動兩個實例

#!/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參數說明:

-d選項是啟動一個守護進程

-m是分配給Memcache使用的內存數量，單位是MB，我這里是16MB

-u是運行Memcache的用戶，我這里是root

-l是監聽的服務器IP地址

-p是設置Memcache監聽的端口,最好是1024以上的端口

-c選項是最大運行的并發連接數，默認是1024，按照你服務器的負載量來設定

-P是設置保存Memcache的pid文件

其他參數省略說明。

[root@localhost ~]# chkconfig --level 2345 memcached on  #開機啟動服務

#向memcached中寫入數據

[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

通過telnet命令寫入數據

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.

安裝Memcached客戶端

http://pecl.php.net/package/memcache #下載所有版本地址

[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是用來擴展PHP擴展模塊的，通過phpize可以建立PHP的外掛模塊。

[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模塊

[root@localhost memcache-2.2.4]#cd /application/php/lib/

[root@localhost lib]# vi php.ini  #在末尾添加以下兩行

extension_dir="/application/php/lib/php/extensions/no-debug-non-zts-20090626/"

extension=memcache.so

[root@localhost lib]# /application/php/sbin/php-fpm  -t  #檢查語法

[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   #啟動服務

[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      

 重啟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   

 測試Memcached客戶端安裝是否成功？http://192.168.222.130/phpinfo.php

Phpinfo.php文件內容如下：

<?php

Phpinfo();

?>

測試LNMP環境是否連接Memcached服務成功?

[root@localhost www]# vi  op_mem.php

<?php

$memcache=new memcache;

$memcache->connect('192.168.222.130',11211) or die ("Could not connect Mc Server");

$memcache->set('key','學習Memcached');

$get=$memcache->get('key');

echo $get;

?>
[root@localhost www]# /application/php/bin/php  op_mem.php 

學習Memcached

或者瀏覽器訪問：http://192.168.222.130/op_mem.php