概念：
      负载均衡建立在现有网络结构之上，它提供了一种廉价有效透明的方法扩展网络设备和服务器的带宽、增加吞吐量、加强网络数据处理能力、提高网络的灵活性和可用性nginx：配置
      

[Java] 纯文本查看 复制代码

upstream tomcatserver1 {
        server 192.168.3.43:8080;
        server 192.168.3.43:8082; #多加了此台服务器
 }
    upstream tomcatserver2 {
        server 192.168.3.43:8082;
    }
   server {
        listen       80;
        server_name  8080.zcinfo.com;
 
        #charset koi8-r;
 
        #access_log  logs/host.access.log  main;
 
        location / {
            proxy_pass   http://tomcatserver1;
            index  index.html index.htm;
        }  
    }
    server {
        listen       80;
        server_name  8082.zcinfo.com;
 
        #charset koi8-r;
 
        #access_log  logs/host.access.log  main;
 
        location / {
            proxy_pass   http://tomcatserver2;
            index  index.html index.htm;
        }
    }
如果两台服务器性能差不多这样设置重启nginx就行了，但是现在假如两台服务器性能不一样，还需要设置性能权重，让性能高服务器做更多事情。只需要加入weight=?就行了，如下：

upstream tomcatserver1 {
        server 192.168.3.43:8080 weight=2;
        server 192.168.3.43:8082 weight=1; 
 }
    upstream tomcatserver2 {
        server 192.168.3.43:8082;
    }
   server {
        listen       80;
        server_name  8080.zcinfo.com;
 
        #charset koi8-r;
 
        #access_log  logs/host.access.log  main;
 
        location / {
            proxy_pass   http://tomcatserver1;
            index  index.html index.htm;
        }  
    }
    server {
        listen       80;
        server_name  8082.zcinfo.com;
 
        #charset koi8-r;
 
        #access_log  logs/host.access.log  main;
 
        location / {
            proxy_pass   http://tomcatserver2;
            index  index.html index.htm;
        }
    }

概念：
      负载均衡建立在现有网络结构之上，它提供了一种廉价有效透明的方法扩展网络设备和服务器的带宽、增加吞吐量、加强网络数据处理能力、提高网络的灵活性和可用性nginx：配置
      

[Java] 纯文本查看 复制代码

upstream tomcatserver1 {
        server 192.168.3.43:8080;
        server 192.168.3.43:8082; #多加了此台服务器
 }
    upstream tomcatserver2 {
        server 192.168.3.43:8082;
    }
   server {
        listen       80;
        server_name  8080.zcinfo.com;
 
        #charset koi8-r;
 
        #access_log  logs/host.access.log  main;
 
        location / {
            proxy_pass   http://tomcatserver1;
            index  index.html index.htm;
        }  
    }
    server {
        listen       80;
        server_name  8082.zcinfo.com;
 
        #charset koi8-r;
 
        #access_log  logs/host.access.log  main;
 
        location / {
            proxy_pass   http://tomcatserver2;
            index  index.html index.htm;
        }
    }
如果两台服务器性能差不多这样设置重启nginx就行了，但是现在假如两台服务器性能不一样，还需要设置性能权重，让性能高服务器做更多事情。只需要加入weight=?就行了，如下：

upstream tomcatserver1 {
        server 192.168.3.43:8080 weight=2;
        server 192.168.3.43:8082 weight=1; 
 }
    upstream tomcatserver2 {
        server 192.168.3.43:8082;
    }
   server {
        listen       80;
        server_name  8080.zcinfo.com;
 
        #charset koi8-r;
 
        #access_log  logs/host.access.log  main;
 
        location / {
            proxy_pass   http://tomcatserver1;
            index  index.html index.htm;
        }  
    }
    server {
        listen       80;
        server_name  8082.zcinfo.com;
 
        #charset koi8-r;
 
        #access_log  logs/host.access.log  main;
 
        location / {
            proxy_pass   http://tomcatserver2;
            index  index.html index.htm;
        }
    }