NGINX实现反向代理

一、安装NGINX

略，请自行百度，GOOGEL

二、配置文件
1.由上面的步骤，我们看到配置文件放置在/etc/nginx/目录下:
主要配置文件：/etc/nginx/nginx.conf
扩展配置文件：/etc/nginx/conf.d/*.conf

user www-data;
worker_processes ;
pid /var/run/nginx.pid;

events {
    worker_connections ;
    # multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout ;
    types_hash_max_size ;
    # server_tokens off;

    # server_names_hash_bucket_size ;
    # server_name_in_redirect off;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    ##
    # Logging Settings
    ##

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    ##
    # Gzip Settings
    ##

    gzip on;
    gzip_disable "msie6";

    # gzip_vary on;
    # gzip_proxied any;
    # gzip_comp_level ;
    # gzip_buffers  8k;
    # gzip_http_version 1.1;
    # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

    ##
    # nginx-naxsi config
    ##
    # Uncomment it if you installed nginx-naxsi
    ##

    #include /etc/nginx/naxsi_core.rules;

    ##
    # nginx-passenger config
    ##
    # Uncomment it if you installed nginx-passenger
    ##

    #passenger_root /usr;
    #passenger_ruby /usr/bin/ruby;

    ##
    # Virtual Host Configs
    ##

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

主配置文件的末尾，加载所有扩展配置文件里面以.conf结尾的文件。所以我们不要修改主要配置文件（不需要修改），用户配置都放到了/etc/nginx/conf.d/目录下，里面默认有两个配置文件，一个普通的配置，一个是ssl配置。

2.为一个域名配置一个文件(文件名任意，以.conf结尾即可)
#cd /etc/nginx/conf.d/
#vim www.test.com.conf
把内容修改如下：
---------------------------------------------------------------------------
server {
    listen       80;
    server_name  www.test.com;

charset utf8;
    access_log  /var/log/nginx/www.test.com.access.log  main;

location / {
        proxy_pass       http://192.168.1.20:80;
        proxy_set_header Host      $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}
---------------------------------------------------------------------------

3.重启nginx服务，检查配置文件并生效（nginx -t）
#service nginx restart

4.如果没出意外，你应该已经成功实现Nginx反向代理服务了！

三、其他帮助
1.帮助命令
2.官方帮助文档：http://nginx.org/en/docs/