如何让多个不同类型的后端网站用一个nginx进行反向代理实际场景

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    log_format  main  '$host ----> $remote_addr - $remote_user [$time_local] "$request" '
                      $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       ;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

    # location = /get {
        #     set_unescape_uri $key $arg_key;  # this requires ngx_set_misc
        #     redis2_query get $key;
        #     redis2_pass 10.105.13.174:6379;
        # }

        location / {
           
                      }

           root   html;
           index  index.html index.htm;   
           
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 
        #
        #location ~ .php$ {
        #    proxy_pass   http:127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 9000 .php$ {
        #    root           html;
        #    fastcgi_pass   ;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files,if Apaches document root
        # concurs with nginxs one
        #
        #location ~ /.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-,name-,and port-based configuration
    #
    server {
        listen        {
            root   html;
            index  apollo.html;
        }
    }

    server {
        listen        {
            root   html;
            index  jenkins.html;
        }
    }

    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}