Nginx負載均衡設置
環境：
負載均衡：192.168.188.128:80
Web1：192.168.188.128:81
Web2：192.168.188.129:80
正式環境中，需要解析域名www.doubles.cn、abc.dd.cn到負載均衡機器192.168.188.128，我們現在測試，就直接在本地windows下的hosts里面綁定域名：
192.168.188.128 www.doubles.cn
192.168.188.128 abc.dd.cn
1、單個域名的負載均衡
1.1、在web1（192.168.188.128）上搭好web環境：
[root@localhost conf]# vim /usr/local/nginx/conf/nginx.conf ... include vhost/*.conf; ... }
在http{}最下面添加include vhost/*.conf;每個域名對應一個conf文件。
新建vhost目錄。
[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/里面寫好html文件：
[root@localhost conf]# vim /usr/local/nginx/html/index.html #測試內容自定義 ……
重新加載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
測試web1：
1.2、在web2（192.168.188.129）上搭好web環境：
按照1.1的方法同樣搭建web2的環境，
新建虛擬主機：
[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/里面寫好html文件：
[root@localhost conf]# vim /usr/local/nginx/html/index.html #測試內容自定義 ……
重新加載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
測試如下：
注意：正式環境當中，web1和web2機器上面的網頁內容應該是一致的，才能做負載均衡。這里為了區分兩台機，所以在網頁內容中區分了下。
1.3、在負載均衡機器（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)：這里upstream與proxy_pass的名字必須一致，這里都是doublesweb。
重新加載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
測試：
在windows上打開瀏覽器：輸入網址www.doubles.cn，發現已經可以輪詢web1和web2了
再刷新：
2、多個域名的負載均衡
在1中我們只對www.doubles.cn做了負載均衡，實際環境中我們可能需要對多個域名進行負載均衡。這里我們添加一個abc.dd.cn。
2.1、web1上面新建虛擬主機abc.dd.cn
增加網頁目錄/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
添加一個abc.dd.cn.conf的虛擬主機：
[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;
}
}
重新加載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上新建虛擬主機abc.dd.cn
跟web1同樣的操作：
增加網頁目錄/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
添加一個abc.dd.cn.conf的虛擬主機：
[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;
}
}
重新加載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、配置負載均衡
在負載均衡機器(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 $proxy_add_x_forwarded_for;
}
.....
（注意）：這里upstream后面的名字必須跟你訪問的域名保持完全一致，否則將無法代理。因為proxy_pass是根據$host來匹配的。
重新加載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
測試：
再刷新：
測試之前的域名：
仍然可以進行負載均衡，所以生效。