yum安装实现lamp分离及Xcache加速
LAMP的搭建：准备前提：
虚拟机：Centos7 172.18.250.77 安装httpd，通过Fcgi模块来跟php互动，只处理静态网页。
虚拟机：Centos7 172.18.250.78 安装php-fpm程序，php-5.3.3的版本已经包含了php-fpm，不需要在打补丁，但CentOS6上官方源没有php-fpm包，所以用CentOS 7 实验。
虚拟机：CentOS6172.18.250.76 安装mysql，实现php跟mysql的互动。
httpd提供两个虚拟主机，分别安装wordpress博客及discuz论坛。
一、yum安装httpd
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# yum -y install httpd
1、编辑主配置文件，注释DocumentRoot
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# vim conf/httpd.conf
#DocumentRoot "/var/www/html"
2、创建虚拟主机文件
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# cd /etc/httpd/conf.d/
# vim vhost.conf
<VirtualHost *:80>
ServerName www.a.com
DocumentRoot "/www/blog"
<Directory "/www/blog">
Options None
Allowoverride None
Require all granted
<Directory>
ProxyRequests Off
ProxyPassMatch ^/(.*\.php)$ fcgi://172.18.250.78:9000/www/blog/$1
</VirtualHost>
<VirtualHost *:80>
ServerName www.b.net
DocumentRoot "/www/php"
<Directory "/www/php">
Options None
Allowoverride None
Require all granted
<Directory>
ProxyRequests Off
ProxyPassMatch ^/(.*\.php)$ fcgi://172.18.250.78:9000/www/php/$1
</VirtualHost>
3、创建虚拟主机需要的目录
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# mkdir -p /www/blog
# mkdir -p /www/php
4、启动httpd服务，查看监听端口
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# systemctl start httpd.service
# ss -tan
LISTEN 0 128 :::80 :::*
5、在虚拟主机目录创建测试页，看httpd是否正常
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# echo "www.a.com" >/www/blog/index.html
# echo "www.b.net" >/www/php/index.html
OK,虚拟主机正常
二、yum安装PHP
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# yum -y install php-fpm
PHP-FPM是一个PHPFastCGI管理器，是只用于PHP的，httpd通过Fcgi模块来把php的文件传送给php-fpm进行处理
1、编辑php-fpm文件
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# vim /etc/php-fpm.d/www.conf
listen = 172.18.250.78:9000 //本机IP
listen.allowed_clients = 172.18.250.77 //httpd端IP
2、重启php-fpm程序，查看监听端口
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# systemctl start php-fpm.service
# ss -tan
LISTEN 0 128 172.18.250.78:9000 *:*
3、在php端上创建和httpd上一样的目录
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# mkdir -p /www/blog
# mkdir -p /www/php
4、创建测试页，验证看httpd能不能转发过来
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# mkdir -p /www/blog
# mkdir -p /www/php
# vim /www/blog/index.php
# vim /www/php/index.php
<?php
phpinfo();
?>
OK,httpd能读到.php结尾的文件并转发给php处理
三、yum安装mysql
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# yum -y install mysql-server
1、启动mysql，并对数据库就行安全加固
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# service mysqld start
# mysql_secure_installation
Enter current password for root (enter for none): //默认数据库密码为空
Set root password? y //设置新密码
Remove anonymous users? y //移除匿名用户
Disallow root login remotely? n //是否禁止用户远程登录
Remove test database and access to it? y //是否移除test数据库
Reload privilege tables now? y //是否重启加载权限列表
2、创建用户和数据库，并授权php端能远程登录
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mysql> grant all on *.* to 'admin'@'172.18.250.78' identified by "admin";
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> create database mytest;
Query OK, 1 row affected (0.00 sec)
mysql> create database bbs;
Query OK, 1 row affected (0.01 sec)
3、测试php能不能登录数据库
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# yum -y install php-mysql //安装mysql驱动
# vim /www/blog/index.php
# vim /www/php/index.php
<?php
$conn = mysql_connect ('172.18.250.76','admin','admin');
if( $conn )
echo "SUCCESS";
else
echo "Failure";
?>
# systemctl restart php-fpm.service
OK，测试正常，可以安装wordpress和Discuz论坛
1、分别在php服务器上和httpd上解压wordpress包
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# unzip wordpress-4.3.1-zh_CN.zip
# unzip wordpress-4.3.1-zh_CN.zip
# cd wordpress //只需在php上改动
# cp wp-config-sample.php wp-config.php
/** WordPress数据库的名称 */
define('DB_NAME', 'mytest');
/** MySQL数据库用户名 */
define('DB_USER', 'admin');
/** MySQL数据库密码 */
define('DB_PASSWORD', 'admin');
/** MySQL主机 */
define('DB_HOST', '172.18.250.76');
出现这个页面的话只需要修改httpd主配置文件，让httpd能识别php的文件代码
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# vim /etc/httpd/conf/httpd.conf
AddType application/x-httpd-php .php //添加下面的语句就行
AddType aaplication/x-httpd-source .phps
<IfModule dir_module>
DirectoryIndex index.php index.html
</IfModule>
重启httpd服务，再次测试下
登录wordPress博客：
OK，WordPress博客能正常加载
1、分别在php服务器上和httpd上解压Discuz包
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# unzip Discuz_X3.2_SC_UTF8.zip
# unzip Discuz_X3.2_SC_UTF8.zip
# cd upload //在php服务器上
修改目录的权限即可：
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# chown -R apache config/
# chown -R apache uc_client/ //httpd和php上都需要改
# chown -R apache data
# chown -R apache template/
# chown -R apache uc_server/
根据步骤一步步执行就行：
注册完后登录论坛：
。。。。。发现论坛只有文字，这是因为php安装了Discuz后修改了程序的文件导致的，这时httpd上的静态程序文件跟php上的动态程序文件不一致，所以只需要同步下就行。
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# scp -r upload/* root@172.18.250.77:/www/php/upload/
再次刷新：OK
如果想要实现自动同步的话，可以使用initory+rsync、sersync等工具。
四：安装Xcahe对php进行加速
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# tar -xf xcache-3.2.0.tar.bz2 //只需在PHP服务器上
# ls
xcache-3.2.0xcache-3.2.0.tar.bz2
# cd xcache-3.2.0
# yum -y install php-devel //安装php开发工具包
# phpize //检查php的版本及api接口
Configuring for:
PHP Api Version: 20100412
Zend Module Api No: 20100525
Zend Extension Api No: 220100525
# ./configure --enable-xcache --with-php-config=/usr/bin/php-config
# make && make install
# cp xcache.ini /etc/php.d/
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# ab -n100 -c10 http://172.18.250.77/wordpress/index.php
Benchmarking 172.18.250.77 (be patient).....done
Server Software: Apache/2.4.6
Server Hostname: 172.18.250.77
Server Port: 80
Document Path: /wordpress/index.php
Document Length: 0 bytes
Concurrency Level: 10
Time taken for tests: 3.908 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Non-2xx responses: 100
Total transferred: 34900 bytes
HTML transferred: 0 bytes
Requests per second: 25.59 [#/sec] (mean)//ab压力测试每秒请求个数
Time per request: 390.849 (mean)
Time per request: 39.085 (mean, across all concurrent requests)
Transfer rate: 8.72 received
Connection Times (ms)
minmean[+/-sd] median max
Connect: 0 0 0.3 0 1
Processing: 10436995.7 368 589
Waiting: 10436794.8 367 589
Total: 10536995.7 368 589
Percentage of the requests served within a certain time (ms)
50% 368
66% 410
75% 443
80% 455
90% 502
95% 536
98% 589
99% 589
100% 589 (longest request)
重启php-fpm服务，看xcache有没有加载：
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# php -m
//表明xcache已经开启
XCache
XCache Cacher
再一次做ab压力测试：
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# ab -n100 -c10 http://172.18.250.77/wordpress/index.php
Benchmarking 172.18.250.77 (be patient).....done
Server Software: Apache/2.4.6
Server Hostname: 172.18.250.77
Server Port: 80
Document Path: /wordpress/index.php
Document Length: 0 bytes
Concurrency Level: 10
Time taken for tests: 1.489 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Non-2xx responses: 100
Total transferred: 34900 bytes
HTML transferred: 0 bytes
Requests per second: 67.18 [#/sec] (mean) //加载xcache后有了提升
Time per request: 148.853 (mean)
Time per request: 14.885 (mean, across all concurrent requests)
Transfer rate: 22.90 received
Connection Times (ms)
minmean[+/-sd] median max
Connect: 0 0 0.2 0 1
Processing: 3814131.0 139 240
Waiting: 3714131.0 138 240
Total: 3814131.0 139 240
Percentage of the requests served within a certain time (ms)
50% 139
66% 152
75% 160
80% 168
90% 179
95% 194
98% 216
99% 240
100% 240 (longest request)
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