Nginx实现反向代理负载均衡

逃离我推掉我的手 2022-03-01 10:53 373阅读 0赞

第一步：安装两个tomcat，分别运行在8081和8082端口

修改三处（各加1就行）我配置的是8081  8082

![20190322131555502.png][]

![2019032213162564.png][]

![20190322131655678.png][]

第二步：启动两个tomcat。

tomcat，bin目录下startup.sh

![2019032213184695.png][]

![20190322131857440.png][]

第三步：反向代理服务器的配置(nginx安装目录下conf目录下nginx.conf)

在下方添加（注意IP和端口）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTY2Nzcy_size_16_color_FFFFFF_t_70][]

完整：

#user  nobody;
    worker_processes  1;
    
    #error_log  logs/error.log;
    #error_log  logs/error.log  notice;
    #error_log  logs/error.log  info;
    
    #pid        logs/nginx.pid;
    
    
    events {
        worker_connections  1024;
    }
    
    
    http {
        include       mime.types;
        default_type  application/octet-stream;
    
        #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
        #                  '$status $body_bytes_sent "$http_referer" '
        #                  '"$http_user_agent" "$http_x_forwarded_for"';
    
        #access_log  logs/access.log  main;
    
        sendfile        on;
        #tcp_nopush     on;
    
        #keepalive_timeout  0;
        keepalive_timeout  65;
    
        #gzip  on;
    
        server {
            listen       80;
            server_name  localhost;
    
            #charset koi8-r;
    
            #access_log  logs/host.access.log  main;
    
            location / {
                root   html;
                index  index.html index.htm;
            }
        }
    
    	upstream baidu {
    	server 192.168.163.129:8081;
        }
        server {
            listen       80;
            server_name  www.baidu.com;
    
            #charset koi8-r;
    
            #access_log  logs/host.access.log  main;
    
            location / {
                proxy_pass   http://baidu;
                index  index.html index.htm;
            }
        }
        upstream sina {
    	server 192.168.163.129:8082;
        }
        server {
            listen       80;
            server_name  www.sina.com;
    
            #charset koi8-r;
    
            #access_log  logs/host.access.log  main;
    
            location / {
                proxy_pass   http://sina;
                index  index.html index.htm;
            }
        }
       
       
    }

第四步：nginx重新加载配置文件

![20190322132238820.png][]

第五步：配置域名

在hosts文件中添加域名和ip的映射关系

![20190322132300617.png][]

### **负载均衡** ###

如果一个服务由多条服务器提供，需要把负载分配到不同的服务器处理，需要负载均衡。(再配一个tomcat)

![201903221329485.png][]

可以根据服务器的实际情况调整服务器权重。权重越高分配的请求越多，权重越低，请求越少。默认是都是1

![20190322133017414.png][]

[20190322131555502.png]: /images/20220301/442bd2ea0e0742bc9e4d519d0cb66b46.png
[2019032213162564.png]: /images/20220301/660760eb6e11402d8ff8542214e96cdf.png
[20190322131655678.png]: /images/20220301/abee294cea904120989bc3498f42c0ed.png
[2019032213184695.png]: /images/20220301/ae59e49244ff4b54aba0208be9fb08a9.png
[20190322131857440.png]: /images/20220301/d75543dae3364176b22e6569b9d53582.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTY2Nzcy_size_16_color_FFFFFF_t_70]: /images/20220301/e351ad8ec4114ab0891bd2b523cc079a.png
[20190322132238820.png]: /images/20220301/4efd7f14939247de8b4c47b146022bb2.png
[20190322132300617.png]: /images/20220301/af469ad6411d4025963be151f8bf0b55.png
[201903221329485.png]: /images/20220301/a12c8481c9eb4b25a949f8f5d36f5f74.png
[20190322133017414.png]: /images/20220301/748894d384f34fa09c9c58989241ab7f.png