Apache负载均衡的实现

1、查看是否有mod_proxy_http.so、mod_proxy_balancer.so、mod_proxy.so三个模块

# ll /usr/local/apache2/modules

2、加载模块

# cd /usr/local/src/httpd-2.2.23/modules/proxy/

# /usr/local/apache2/bin/apxs -c -i mod_proxy.c proxy_util.c

# /usr/local/apache2/bin/apxs -c -i mod_proxy_balancer.c

# /usr/local/apache2/bin/apxs -c -i mod_proxy_http.c

3、修改http.conf配置文件

# vim /usr/local/apache2/conf/httpd.conf

 LoadModule proxy_module    modules/mod_proxy.so

 LoadModule proxy_balancer_module modules/mod_proxy_balancer.so

 LoadModule proxy_http_module  modules/mod_proxy_http.so

 ProxyRequests Off

 <Proxy balancer://clusterphpinfo>

 BalancerMember http://10.0.2.203:80 loadfactor=1

 BalancerMember http://10.0.2.204:80 loadfactor=1

 </Proxy>

 ProxyPass / balancer://clusterphpinfo

4、重启httpd服务

# service httpd restart

5、通过apache将后端服务器做出主从,只需要在从服务器后面添加status=+H

# vim /usr/local/apache2/conf/httpd.conf

 BalancerMember http://10.0.2.204:80 loadfactor=1 status=+H

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