两台Web服务器 实现负载均衡 +FastCGI模块+MySQL实现分布式架构
两台Web服务器 实现负载均衡 +FastCGI模块+MySQL实现分布式架构
操作系统:RedHat 5.8
实验环境准备 :三台服务器
Server 1 IP :172.16.2.1 安装:apache NFS
Server 2 IP :172.16.2.2 安装:apache DNS
Server 3 IP:172.16..2.3 安装:php mysql
实验图如下 :

工作原理:
1、当客户端请求www.tast.com
2、Server 2 上的DNS会以轮询的方式把请求转给 172.16.2.1 和172.16.2.2
3、如果此次请求是静态页面 web服务就直接把结果返给客户 ,如果是动态页面,就转给server 3 上的php 解析
4、如果需要用到数据库的数据,就通过数据库的接口访问数据库
5、Php解析后把结果返回给前端的web
6、Web把结果返回给客户
步骤
1、配置server 1
安装配置 apache 和 NFS
2、配置 server 2
安装配置apache 和DNS
3、配置 server 3
安装配置 mysql 和 php
4、总结
注:此次试验只是给大家提供一种思路,可以这么配置,企业实际需求中,不同的需求,不同的操作系统,不同的软件版本,配置过程会略有不同,但原理都是想通了,希望大家在做实验的同时不要忘了思考,学而不思则罔,原理理解了,我们就可以根据实际需求搭建出更适合自己需要的服务。
过程:
一、配置server 1
1.1 配置编译安装环境
由于此次试验每个软件都是编译安装,所以每台服务器都要先配置好编译安装环境
确保这两个组安装
Development Tools Development Libraries #yum -y groupinstall "Development Libraries"
1.2 安装httpd 2.4.2 版本
#yum -y install pcre-devel 解决依赖关系 # tar xf httpd-2.4.2.tar.bz2 # cd httpd-2.4.2 # less INSTALL 查看安装说明 $ ./configure --prefix=PREFIX $ make $ make install $ PREFIX/bin/apachectl start # ./configure --prefix=/usr/local/apache --sysconfdir=/etc/httpd --enable-so --enable-rewrite --with-zlib --with-pcre --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util --enable-modules=most --enable-ssl --enable-modules-shared=most #make && make install
1.3 修改httpd的主配置文件,设置其Pid文件的路径
#vim /etc/httpd/httpd.conf idFile "/var/run/httpd.pid" 添加
1.4 提供SysV服务脚本,内容如下:
#vim /etc/rc.d/init.d/httpd
#!/bin/bash
#
# httpd Startup script for the Apache HTTP Server
#
# chkconfig: - 85 15
# description: Apache is a World Wide Web server. It is used to serve \
# HTML files and CGI.
# processname: httpd
# config: /etc/httpd/conf/httpd.conf
# config: /etc/sysconfig/httpd
# pidfile: /var/run/httpd.pid
# Source function library.
. /etc/rc.d/init.d/functions
if [ -f /etc/sysconfig/httpd ]; then
. /etc/sysconfig/httpd
fi
# Start httpd in the C locale by default.
HTTPD_LANG=${HTTPD_LANG-"C"}
# This will prevent initlog from swallowing up a pass-phrase prompt if
# mod_ssl needs a pass-phrase from the user.
INITLOG_ARGS=""
# Set HTTPD=/usr/sbin/httpd.worker in /etc/sysconfig/httpd to use a server
# with the thread-based "worker" MPM; BE WARNED that some modules may not
# work correctly with a thread-based MPM; notably PHP will refuse to start.
# Path to the apachectl script, server binary, and short-form for messages.
apachectl=/usr/local/apache/bin/apachectl
httpd=${HTTPD-/usr/local/apache/bin/httpd}
prog=httpd
pidfile=${PIDFILE-/var/run/httpd.pid}
lockfile=${LOCKFILE-/var/lock/subsys/httpd}
RETVAL=0
start() {
echo -n $"Starting $prog: "
LANG=$HTTPD_LANG daemon --pidfile=${pidfile} $httpd $OPTIONS
RETVAL=$?
echo
[ $RETVAL = 0 ] && touch ${lockfile}
return $RETVAL
}
stop() {
echo -n $"Stopping $prog: "
killproc -p ${pidfile} -d 10 $httpd
RETVAL=$?
echo
[ $RETVAL = 0 ] && rm -f ${lockfile} ${pidfile}
}
reload() {
echo -n $"Reloading $prog: "
if ! LANG=$HTTPD_LANG $httpd $OPTIONS -t >&/dev/null; then
RETVAL=$?
echo $"not reloading due to configuration syntax error"
failure $"not reloading $httpd due to configuration syntax error"
else
killproc -p ${pidfile} $httpd -HUP
RETVAL=$?
fi
echo
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
status)
status -p ${pidfile} $httpd
RETVAL=$?
;;
restart)
stop
start
;;
condrestart)
if [ -f ${pidfile} ] ; then
stop
start
fi
;;
reload)
reload
;;
graceful|help|configtest|fullstatus)
$apachectl $@
RETVAL=$?
;;
*)
echo $"Usage: $prog {start|stop|restart|condrestart|reload|status|fullstatus|graceful|help|configtest}"
exit 1
esac
exit $RETVAL
# chmod +x /etc/rc.d/init.d/httpd 为此脚本赋予执行权
# chkconfig --add httpd 加入服务列表: 1.5 安装apache fastcgi模块:
#tar -zxvf mod_fastcgi-current.tar.gz #cd mod_fastcgi #cp Makefile.AP2 Makefile #Vim Makefile 修改top_dir=/usr/local/apache #你的apache安装路径 #make #make install
1.6修改配置文件 让apache支持php-fpm
增加: LoadModule fastcgi_module modules/mod_fastcgi.so 有的话不用添加。 ScriptAlias /cgi-bin/ "/usr/local/php/bin/" FastCgiExternalServer /usr/local/php/bin/php-fpm -host 172.16.2.3:9000 AddType application/x-httpd-php .php AddHandler php-fastcgi .php Action php-fastcgi /cgi-bin/php-fpm <Directory "/usr/local/php/bin/"> Options -Indexes FollowSymLinks +ExecCGI Order allow,deny Allow from all </Directory>
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