nginx的反向代理的几种形式及upstream负载均衡的用法

基于IP地址及端口的反向代理方式：

server {
    listen       81;
    server_name  localhost;
    location / {
        proxy_pass http://192.168.0.153:9091;
        proxy_redirect default;
    }
    location = /50x.html {
        root   html;
    }
}

基于域名的反向代理方式：

server {
    listen       82;
    server_name  localhost;
    location / {
        proxy_pass http://git.itplh.com;
        proxy_redirect default;
    }
    location = /50x.html {
        root   html;
    }
}

基于域名代理 + upstream负载均衡

upstream gitlocal{
  server 192.168.0.153:9091;
  server 192.168.0.154:9091;
  server 192.168.0.155:9091;
}
#上述代码位于http{}内
server {
    listen       80;
    server_name  gitlocal.com;
    location / {
        proxy_pass http://gitlocal;
        proxy_redirect default;
    }
    location = /50x.html {
        root   html;
    }
}