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。