nginx+apache负载均衡

 学习过程记录如下：感谢为我提供帮助的朋友们！

1: 在一台机器上安装nginx（过程省略），该机器的ip为：192.168.1.2
2：在另一台机器上安装php+mysql+apache（过程省略） ，该机器的ip为：192.168.1.9
3：将nginx和apache整合起来！
nginx.conf如下：

[root@qht124 conf]# cat nginx.conf
user www www;
worker_processes 4;

# [ debug | info | notice | warn | error | crit ]
error_log /usr/local/nginx/logs/nginx_error.log crit;
pid /usr/local/nginx/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 51200;
events
{
use epoll;
worker_connections 51200;
}

http
{
include mime.types;
default_type application/octet-stream;
source_charset GB2312;
server_names_hash_bucket_size 256;
client_header_buffer_size 256k;
large_client_header_buffers 4 256k;

#size limits
client_max_body_size 50m;
client_body_buffer_size 256k;
client_header_timeout 3m;
client_body_timeout 3m;
send_timeout 3m;
keepalive_timeout 120;
tcp_nodelay on;

include vhosts/upstream.conf;
include vhosts/www.def.com.conf;

}

在nginx的安装目录下新建一个conf目录，目录里有两个文件，分别为upstream.conf和www.def.com.conf 这两个文件的内容如下：

[root@qht124 conf]# pwd
/usr/local/nginx/conf
[root@qht124 conf]# cd vhosts/
[root@qht124 vhosts]# ls
upstream.conf www.def.com.conf
[root@qht124 vhosts]# pwd
/usr/local/nginx/conf/vhosts
[root@qht124 vhosts]# cat upstream.conf
upstream www.def.com {
server 192.168.1.9:80;
}
[root@qht124 vhosts]# cat www.def.com.conf
server
{
listen 80;
server_name www.def.com;
charset GB2312;
index index.php index.html index.htm;
root /usr/vhome/d/e/f/def.com/www;

location ~ ^/NginxStatus/ {
stub_status on;
access_log off;
}

location / {
proxy_redirect off ;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header REMOTE-HOST $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size 50m;
client_body_buffer_size 256k;
proxy_connect_timeout 30;
proxy_send_timeout 30;
proxy_read_timeout 60;
proxy_buffer_size 256k;
proxy_buffers 4 256k;
proxy_busy_buffers_size 256k;
proxy_temp_file_write_size 256k;
proxy_next_upstream error timeout invalid_header http_500 http_503 http_404;
proxy_max_temp_file_size 128m;
proxy_pass http://www.def.com;
}

#location ~* \.(jpg|jpeg|gif|png|swf|html)$ {
#if (-f $request_filename) {
#root /usr/vhome/d/e/f/def.com/www;
#expires 1d;
#break;
#} ##将这一段注释掉，则所有的访问都叫给apache去处理！否则静态文件会去执行192.168.1.2下的/usr/vhome/d/e/f/def.com/www下的内容。我在192.168.1.9的/usr/vhome/d/e/f/def.com/www下方一个index.php，在192，168.1.2的/usr/vhome/d/e/f/def.com/www下放一个a.jpg和index.html文件，然后手动运行www.def.com/index.html和www.def.com/a.jpg则会执行192.168.1.2下的内容（显然是nginx处理了静态页面）
#}

log_format access '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" $http_x_forwarded_for';
access_log /exp/nginxlogs/www.def.com_access.log access;

}
[root@qht124 vhosts]#

然后再192.168.1.9上httpd.conf中的配置如下：
在httpd.conf中的最后加入一句：
Include conf/vhost.conf

在/usr/local/apache2/conf目录下vhosts.conf文件内容如下：

[root@qht2 conf]# pwd
/usr/local/apache2/conf
[root@qht2 conf]# cat vhost.conf
NameVirtualHost *
<VirtualHost *>
ServerName www.def.com
ScriptAlias /cgi-bin/ /usr/vhome/d/e/f/def.com/cgi-bin/
DocumentRoot /usr/vhome/d/e/f/def.com/www
DirectoryIndex index.html index.jsp index.php
<Directory /usr/vhome/d/e/f/def.com/www>
Order allow,deny
Allow from all
</Directory>
php_admin_value open_basedir /usr/vhome/d/e/f/def.com:/usr/vhome/tmp:/opt/tomcat/bin
</VirtualHost>

最后在一台客户端上，我的是xp系统，做本地解析，在C:\WINDOWS\system32\drivers\etc下hosts文件添加记录如下：

192.168.1.2 def.com
192.168.1.2 www.def.com

并在1912.168.1.9上：
mkdir -p /usr/vhome/d/e/f/def.com/www
cd /usr/vhome/d/e/f/def.com/www
touch index.php
内容为：

[root@qht2 www]# cat index.php
<?
phpinfo();
?>
[root@qht2 www]# pwd
/usr/vhome/d/e/f/def.com/www
[root@qht2 www]#

 测试访问见附件：