使用nginx进行负载均衡和接口定向分发

现有项目中使用到了nginx进行负载均衡和接口的定向分发。

客户端对服务端接口的访问是restful风格的url，例如

http://biz.abc.com:27788/interface/A1000/

http://biz.abc.com:27788/interface/A2000/

系统接口按类别分为核心业务接口和查询业务接口，在部署上按接口规模和类别，分布在不同的应用集群中。

在前端，部署了nginx服务器进行接口的负载均衡和定向分发。

nginx配置示例如下：

worker_processes  1;    events {      worker_connections  1024;  }    http {      include       mime.types;      default_type  application/octet-stream;        sendfile        on;        keepalive_timeout  65;        include loadbalancing.conf;        server {          listen       8808;          server_name  localhost;            location / {              root   html;              index  index.html index.htm;          }          error_page   500 502 503 504  /50x.html;          location = /50x.html {              root   html;          }      }  }

loadbalancing.conf配置如下：

#负载均衡配置    map $zone $loadbalancing   {   A1000  server_main_func_a;    A2000  server_main_func_b;   A3000  server_main_query_a;   A4000  server_main_query_b;   default default_server;  }    #主服务器组a  upstream server_main_func_a  {      server 192.168.100.1:7788;    server 192.168.100.2:7788;    server 192.168.100.3:7788;  }      #主服务器组b  upstream server_main_func_b  {      server 192.168.100.51:7788;    server 192.168.100.52:7788;    server 192.168.100.53:7788;  }      #查询服务器组a  upstream server_main_query_a  {     server 192.168.100.101:7788;   server 192.168.100.102:7788;   server 192.168.100.103:7788;  }     #查询服务器组b  upstream server_main_query_b  {   server 192.168.100.151:7788;   server 192.168.100.152:7788;   server 192.168.100.153:7788;  }     #缺省服务器组  upstream default_server  {   server 192.168.100.201:7788;   server 192.168.100.202:7788;   server 192.168.100.203:7788;  }     server  {   listen       27788;   server_name  biz.abc.com;     error_page   500 502 503 504  /50x.html;          location = /50x.html {              root   html;          }     #带命令字地址访问   location ~ /interface/   {                proxy_pass_header Server;                proxy_set_header Host $http_host;                proxy_redirect off;                proxy_set_header X-Real-IP $remote_addr;                proxy_set_header X-Scheme $scheme;         if ( $request_uri ~ ^/interface/(\w*) ) {                    set $zone $1;                    proxy_pass http://$loadbalancing;                }                       }      location = /interface   {                proxy_pass_header Server;                proxy_set_header Host $http_host;                proxy_redirect off;                proxy_set_header X-Real-IP $remote_addr;                proxy_set_header X-Scheme $scheme;                set $zone $request_uri;                proxy_pass http://$loadbalancing;                     }   }

对于不同类别的接口，应用层面都有一个集群来处理，实现负载。

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当系统某些应用功能更新时，不会影响用户的其他功能的使用。