nginx反向代理的三种模式分别是：

1、基于IP代理

2、基于域名代理

3、基于端口代理

（相关教程推荐：nginx教程）

nginx.conf

worker_processes  1;events {    worker_connections  1024;}http {charset utf-8;    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"';# log_format  main  'remote_addr=$remote_addr:$remote_port, http_x_forwarded_for=$http_x_forwarded_for, proxy_add_x_forwarded_for=$proxy_add_x_forwarded_for ';    access_log  logs/access_format.log  main;    sendfile        on;    #tcp_nopush     on;    #keepalive_timeout  0;    keepalive_timeout  65;    #gzip  on# 原始serverserver {        listen       80;        server_name  localhost;        location / {            root   html;            index  index.html index.htm;        }    }# 引入自定义的server配置include my-proxy-server.conf;}

my-proxy-server.conf

######################################################################### 基于端口代理########################################################################server {listen       81;server_name  localhost;location / {proxy_pass http://192.168.0.153:9091;proxy_redirect default;}location = /50x.html {root   html;}}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 + gitlocal负载均衡########################################################################upstream gitlocal{  server 192.168.0.153:9091;  server 192.168.0.154:9091;  server 192.168.0.155:9091;}upstream gitbj{  server git.itplh.con;}server {    listen       80;    server_name  gitlocal.com;    location / {        proxy_pass http://gitlocal;        proxy_redirect default;    }    location = /50x.html {        root   html;    }}server {    listen       80;    server_name  gitbj.com;    location / {        proxy_pass http://gitbj;        proxy_redirect default;    }    location = /50x.html {        root   html;    }}