Sample code for nginx to implement TCP reverse proxy

# /alidata/nginx/sbin/nginx -v
nginx version: nginx/1.13.7

# /alidata/nginx/sbin/nginx -V
nginx version: nginx/1.13.7
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) 
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: --prefix=/alidata/nginx --user=nginx --group=nginx --with-http_ssl_module --with-http_stub_status_module --with-http_flv_module --with-http_mp4_module --with-pcre=/usr/src/pcre-8.12/ --add-module=/soft/soft/ngx_http_substitutions_filter_module/ --add-module=/soft/soft/ngx_http_google_filter_module

# cd /usr/src/nginx-1.13.7/
# ls
auto       configure  html     Makefile  objs              README
CHANGES  conf        contrib    LICENSE  man       pcre-8.  src

# ./configure  --prefix=/alidata/nginx --user=nginx --group=nginx --with-http_ssl_module --with-http_stub_status_module --with-http_flv_module --with-http_mp4_module --with-pcre=/usr/src/pcre-8.12/ --add-module=/soft/soft/ngx_http_substitutions_filter_module/ --add-module=/soft/soft/ngx_http_google_filter_module --with-stream=dynamic
# make # Only compile here, don't make install

# ls objs/
addon         nginx              ngx_auto_headers.h  ngx_stream_module_modules.c  src
  nginx.8            ngx_modules.c       ngx_stream_module_modules.o
Makefile      ngx_auto_config.h  ngx_modules.o       ngx_stream_module.so

# cd /alidata/nginx/
# mkdir modules #If it exists, there is no need to create it# chown  modules
# cp /usr/src/nginx-1.13.7/objs/ngx_stream_module.so  /alidata/nginx/modules/

# vi /alidata/nginx/conf/
load_module modules/ngx_stream_module.so;     #Loading module
events {
    ......
}
#-------------------- HTTP -------------------------------
http {
    ......
}


#tcp and http are of the same level, here only tcp reverse proxy configuration#-------------------- TCP/UDP -------------------------------
#include /alidata/nginx//*.conf; #You can also point the tcp configuration to a separate configuration file

stream {                                   #stream is a fixed writing method, which means that this is the tcp protocol. If it is installed through the third-party module [nginx_tcp_proxy_module], it will be replaced with tcp.
    upstream proxy_swoole {
        server 172.16.100.17:8090;
    }

    server {
       listen 10001;            #Access http://ip:10001 and jump to 172.16.100.17:8089       proxy_connect_timeout 1s;
       proxy_timeout 3s;
       proxy_pass proxy_swoole;
    }
}

tcp {                                    #tcp means traditional installation of nginx_tcp_proxy_module through third-party modules
        upstream cluster {
                server localhost:2000;
                server localhost:3000;
        }
        server{
                listen 8080;
                proxy_pass cluster;
        }
}

--------------------------------------------------------------------------
stream {                                  #stream means dynamic installation through third-party modules --with-stream=dynamic        upstream cluster {
                server localhost:2000;
                server localhost:3000;
        }
        server{
                listen 8080;
                proxy_pass cluster;
        }
}

# /alidata/nginx/sbin/nginx -s reload
# netstat -npult|grep nginx
tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      34716/nginx         
tcp        0      0 0.0.0.0:10001               0.0.0.0:*                   LISTEN      34716/nginx         
tcp        0      0 0.0.0.0:443                 0.0.0.0:*                   LISTEN      34716/nginx