The company uses K8S to build a test environment, and there are multiple sets of test exchanges. The current idea is to use an export IP for each set of test environment.
The plan:
1. Build ingress
2. Build a reverse agent

Combined with the actual situation, we use to build a reverse agent to solve this problem.

The following K8S services exist in our environment
Vipapi mall COM based on. netcore
Billapi mall COM based on PHP
www-mall-com - PHP based
Mobile mall COM based on VUE

The external domain name of vipapi-mall-com is vipapi.mall.com.
billapi-mall-com the external domain name is billapi.mall.com

kubernetes's Kube DNS address is 10.254.0.2, using coredns
We have the following namespace
branches
tags

The configuration file is as follows:

     upstream vipapi {
        server vipapi-mall-com;     #Under normal circumstances, it will be wrong to put it here, but if you add restover, it will not be wrong. Just fill in the service name of K8S here.
     }
     server {
        listen       80;
        server_name  vipapi.mall.com;
        access_log off;
        resolver 10.254.0.2;        #Note that the configuration of DNS resolution must be placed under the server and not under the location, otherwise it cannot be resolved.
        location / {
             proxy_http_version 1.1;
             proxy_set_header Connection "";
             proxy_redirect off ;
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_set_header REMOTE-HOST $remote_addr;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
             client_max_body_size 50m;
             client_body_buffer_size 256k;
             proxy_connect_timeout 30;
             proxy_send_timeout 30;
             proxy_read_timeout 60;
             proxy_buffer_size 256k;
             proxy_buffers 4 256k;
             proxy_busy_buffers_size 256k;
             proxy_temp_file_write_size 256k;
             proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_404;
             proxy_max_temp_file_size 128m;
             proxy_pass http://vipapi;
        }
     }