实验目标:

实现通过haproxy轮询调度(RR)反代至两台lamp时,用户会话ID保持不变。

版本:

haproxy-1.5.4-3.el6.x86_64,yum安装

memcached-1.4.15-9.el7_2.1.x86_64,yum安装

LAMP:httpd-2.4.9、mariadb-5.5.36-linux-x86_64、php-5.4.26,都是编译安装。

php的memcache扩展模块:memcache-2.2.7,编译安装


PHP安装:(其他安装略过)

编译成php-fpm

./configure--prefix=/usr/local/php-5.2.26--with-mysql=/usr/local/mysql--with-openssl--with-mysqli=/usr/local/mysql/bin/mysql_config--enable-mbstring--with-freetype-dir--with-jpeg-dir--with-png-dir--with-zlib--with-libxml-dir=/usr--enable-xml--enable-sockets--enable-fpm--with-mcrypt--with-config-file-path=/etc--with-config-file-scan-dir=/etc/php-5.2.26--with-bz2


memcache 扩展模块安装

tarxfmemcache-2.2.7.tgzcdmemcache-2.2.7/usr/local/php-5.2.26/bin/phpizeConfiguringfor:PHPApiVersion:20100412ZendModuleApiNo:20100525ZendExtensionApiNo:220100525

./configure--with-php-config=/usr/local/php/bin/php-config--enable-memcachemake&&makeinstall

上述安装完后会有类似以下的提示:

Installingsharedextensions:/usr/local/php-5.2.26/lib/php/extensions/no-debug-non-zts-20100525/memcache.so

编辑/etc/php.ini,在“Dynamic Extensions”相关的位置添加如下一行来载入memcache扩展:

extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/memcache.so


httpd虚拟机配置:(只展示其中一台的配置)

cat/etc/httpd-2.4.9/extra/httpd-vhosts.conf:<VirtualHost192.168.1.30:80>DocumentRoot"/www/test1.com"ErrorLog"logs/dummy-test1.com-error_log"CustomLog"logs/dummy-test1.com-access_log"common<Directory/www/test1.com>requireallgranted</Directory>ProxyRequestsOffProxyPassMatch^/(.*\.php)$fcgi://192.168.1.30:9000/www/test1.com/$1</VirtualHost>


httpd启用PHP及启动导入虚拟机配置:

启动以下两个模块:

LoadModuleproxy_modulemodules/mod_proxy.soLoadModuleproxy_fcgi_modulemodules/mod_proxy_fcgi.so

修改:

DirectoryIndexindex.phpindex.html

添加:

Include/etc/httpd-2.4.9/extra/httpd-vhosts.confAddTypeapplication/x-httpd-php-source.phpsAddTypeapplication/x-httpd-php.php


测试php与memcache的连接是否成功:

cat/www/test1/01.php:<?php$mem=newMemcache;$mem->connect("192.168.1.25",11211)ordie("Couldnotconnect");$version=$mem->getVersion();echo"Server'sversion:".$version."<br/>\n";$mem->set('hellokey','HelloWorld',0,600)ordie("Failedtosavedataatthememcachedserver");echo"Storedatainthecache(datawillexpirein600seconds)<br/>\n";$get_result=$mem->get('hellokey');cho"$get_resultisfrommemcachedserver.";?>

访问此01.php,出现“Hello World is from memcached server”时,说明表memcache与php连接成功。


修改/etc/php.ini,把会话保存到memcache中。

session.save_handler=memcachesession.save_path="tcp://192.168.1.25:11211"


haproxy配置:

frontendmain*:80default_backendappbackendappbalanceroundrobinserverapp1192.168.1.13:80checkserverapp2192.168.1.30:80check


测试会话保存是否成功:

192.168.1.13(lamp)的测试脚本:/www/test1.com/02.php

<?phpsession_start();if(!isset($_SESSION['admin'])){$_SESSION['TEST']='wan';}print$_SESSION['admin'];print"\n";printsession_id();print"\n";print"===>192.168.1.13webserver";?>

192.168.1.30(lamp)的测试脚本:/www/test1.com/02.php

<?phpsession_start();if(!isset($_SESSION['admin'])){$_SESSION['TEST']='wan';}print$_SESSION['admin'];print"\n";printsession_id();print"\n";echo"===>192.168.1.30webserver"?>

区别在于最后一行print 显示lamp本身的IP地址。

浏览器访问02.php