只簡單說一下upstream的配置，如何進行負載均衡後續還需要多了解

1.另準備一個配置文件命名為nginx_test.conf

為了不汙染原有的nginx.conf，提前復制一份配置文件做試驗，然後啟動nginx時加載nginx_test.conf

啟動命令：

[root@localhost conf]# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx_test.conf

-c參數表示加載指定的配置文件，後面跟的是文件路徑

2.在http模塊下添加upstream配置

    upstream tomcat
    {
      server localhost:
 
8080;   # 對應之前server下location中添加的 proxy_pass
    } 
    upstream ApprPhD
    {
       server 192.168.0.107:3030;
    }

server {
        listen    80 default_server;
        server_name demo.com ;
        #charset koi8-r;


        location / {
        proxy_pass http://tomcat;
        }


        error_page   500
 
 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
}
    server {
        listen    80 default_server;
        server_name demo.com ;
        #charset koi8-r;

        location / {
        proxy_pass http://tomcat;  #對應上面upstream tomcat
        }

        error_page   500 502
 
 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

       location /jenkins {                #nodeJs服務器
              proxy_pass  http://tomcat;   # 對應上面upstream tomcat

              proxy_set_header        Host $host;
              proxy_set_header        X-Real-IP $remote_addr;  #獲取真實ip
              proxy_connect_timeout   90;
              proxy_send_timeout      90;
              proxy_read_timeout      90;
              proxy_buffer_size       4k;
              proxy_buffers           4 32k;
              proxy_busy_buffers_size 64k;
              proxy_temp_file_write_size 64k;
              proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;#獲取代理者的真實ip
              proxy_redirect          off;
       }
       location /ApprPhD {                #nodeJs服務器
              proxy_pass http://ApprPhD;   # 對應上面upstream為ApprPhD
              proxy_set_header        Host $host;
              proxy_set_header        X-Real-IP $remote_addr;  #獲取真實ip
              proxy_set_header REMOTE-HOST $remote_addr;
              proxy_connect_timeout   90;
              proxy_send_timeout      90;
              proxy_read_timeout      90;
              proxy_buffer_size       4k;
              proxy_buffers           4 32k;
              proxy_busy_buffers_size 64k;
              proxy_temp_file_write_size 64k;
              proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;#獲取代理者的真實ip
              proxy_redirect          off;
       }
    }

初探nginx負載均衡配置