Nginx多域名负载均衡配置

Nginx负载均衡设置

环境：

负载均衡：192.168.188.128:80

Web1：192.168.188.128:81

Web2：192.168.188.129:80

正式环境中，需要解析域名www.doubles.cn、abc.dd.cn到负载均衡机器192.168.188.128，我们现在测试，就直接在本地windows下的hosts里面绑定域名：

192.168.188.128 www.doubles.cn

192.168.188.128 abc.dd.cn

1、单个域名的负载均衡

1.1、在web1（192.168.188.128）上搭好web环境：

[root@localhost conf]# vim /usr/local/nginx/conf/nginx.conf
...
include vhost/*.conf;
...
}

在http{}最下面添加include vhost/*.conf;每个域名对应一个conf文件。

新建vhost目录。

[root@localhost conf]# mkdir /usr/local/nginx/conf/vhost/

新建www.doubles.cn.conf文件：

[root@localhost conf]# vim /usr/local/nginx/conf/vhost/www.doubles.cn.conf
server {
        listen       81;
        server_name  www.doubles.cn localhost 192.168.188.128;
        location / {
            root    /usr/local/nginx/html/;
            index  index.html index.php index.htm TempLoginPanel.html;
        }
        location ~ .php$ {
            root           /usr/local/nginx/html/;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }
}

在/usr/local/nginx/html/里面写好html文件：

[root@localhost conf]# vim /usr/local/nginx/html/index.html
#测试内容自定义
……

重新加载nginx配置文件

[root@localhost conf]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@localhost conf]# /usr/local/nginx/sbin/nginx -s reload

测试web1：

1.2、在web2（192.168.188.129）上搭好web环境：

按照1.1的方法同样搭建web2的环境，

新建虚拟主机：

[root@localhost conf]# vim /usr/local/nginx/conf/nginx.conf
...
include vhost/*.conf;
...
}

[root@localhost conf]# mkdir /usr/local/nginx/conf/vhost/
[root@localhost conf]# vim /usr/local/nginx/conf/vhost/www.doubles.cn.conf
server {
        listen       80;
        server_name  www.doubles.cn localhost 192.168.188.129;
        location / {
            root    /usr/local/nginx/html/;
            index  index.html index.php index.htm TempLoginPanel.html;
        }

        location ~ .php$ {
            root           /usr/local/nginx/html/;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }
}

在/usr/local/nginx/html/里面写好html文件：

[root@localhost conf]# vim /usr/local/nginx/html/index.html
#测试内容自定义
……

重新加载nginx配置文件

[root@localhost conf]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@localhost conf]# /usr/local/nginx/sbin/nginx -s reload

测试如下：

注意：正式环境当中，web1和web2机器上面的网页内容应该是一致的，才能做负载均衡。这里为了区分两台机，所以在网页内容中区分了下。

1.3、在负载均衡机器（192.168.188.128）上：

[root@localhost conf]# vim /usr/local/nginx/conf/nginx.conf
...上面的省略...
upstream  doublesweb {
        #ip_hash;
        server   192.168.188.128:81;
        server   192.168.188.129:80;
    }

server {
        listen       80;
        server_name  localhost;
        location / {
            #root   html;
            #index  index.html index.htm;
            proxy_pass http://doublesweb;
            proxy_connect_timeout 2s;
        }
....略...

(注意)：这里upstream与proxy_pass的名字必须一致，这里都是doublesweb。

重新加载nginx配置文件

[root@localhost conf]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@localhost conf]# /usr/local/nginx/sbin/nginx -s reload

测试：

在windows上打开浏览器：输入网址www.doubles.cn，发现已经可以轮询web1和web2了

再刷新：

2、多个域名的负载均衡

在1中我们只对www.doubles.cn做了负载均衡，实际环境中我们可能需要对多个域名进行负载均衡。这里我们添加一个abc.dd.cn。

2.1、web1上面新建虚拟主机abc.dd.cn

增加网页目录/usr/local/nginx/html/dd/：

[root@localhost html]# mkdir /usr/local/nginx/html/dd/
[root@localhost html]# vim /usr/local/nginx/html/dd/index.html

添加一个abc.dd.cn.conf的虚拟主机：

[root@localhost html]# vim /usr/local/nginx/conf/vhost/abc.dd.cn.conf
server {
        listen       81;
        server_name  abc.dd.cn;
        location / {
            root    /usr/local/nginx/html/dd/;
            index  index.html index.php index.htm TempLoginPanel.html;
        }

        location ~ .php$ {
            root           /usr/local/nginx/html/dd/;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }
}

重新加载nginx配置文件

[root@localhost conf]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@localhost conf]# /usr/local/nginx/sbin/nginx -s reload

2.2、在web2上新建虚拟主机abc.dd.cn

跟web1同样的操作：

增加网页目录/usr/local/nginx/html/dd/：

[root@localhost html]# mkdir /usr/local/nginx/html/dd/
[root@localhost html]# vim /usr/local/nginx/html/dd/index.html

添加一个abc.dd.cn.conf的虚拟主机：

[root@localhost html]# vim /usr/local/nginx/conf/vhost/abc.dd.cn.conf
server {
        listen       80;
        server_name  abc.dd.cn;
        location / {
            root    /usr/local/nginx/html/dd/;
            index  index.html index.php index.htm TempLoginPanel.html;
        }

        location ~ .php$ {
            root           /usr/local/nginx/html/dd/;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }
}

重新加载nginx配置文件

[root@localhost conf]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@localhost conf]# /usr/local/nginx/sbin/nginx -s reload

2.3、配置负载均衡

在负载均衡机器(192.168.188.128)上：

[root@localhost html]# vim /usr/local/nginx/conf/nginx.conf
...
    upstream  www.doubles.cn {
        #ip_hash;
        server   192.168.188.128:81;
        server   192.168.188.129:80;
    }

   upstream  abc.dd.cn {   
       #ip_hash;
       server   192.168.188.128:81; 
       server   192.168.188.129:80;  
   }

    server {
        listen       80;
        server_name  localhost;
        location / {
            #root   html;
            #index  index.html index.htm;
            proxy_pass http://$host;
            proxy_connect_timeout 2s;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
.....

（注意）：这里upstream后面的名字必须跟你访问的域名保持完全一致，否则将无法代理。因为proxy_pass是根据$host来匹配的。

重新加载nginx配置文件

[root@localhost conf]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@localhost conf]# /usr/local/nginx/sbin/nginx -s reload

测试：

再刷新：

测试之前的域名：

仍然可以进行负载均衡，所以生效。