Kubernetes nginx reverse proxy with additional services

Companies use K8S set up a test environment, and there are multiple sets of test change, current thinking is that every test environment using a set of export IP.
Program:
1. build Ingress
2. By building a reverse proxy

Combined with the actual situation, we use a reverse proxy set up to solve this problem.

In our environment there K8S service
vipapi-mall-com #-based .netcore
billapi # COM-Mall-based PHP
the WWW COM #-Mall-based PHP
VUE-based mobile-mall-com #

vipapi-mall-com domain name is the external vipapi.mall.com
billapi-Mall-COM external domain name is billapi.mall.com

kubernetes of KUBE-DNS address is 10.254.0.2, using coredns
us there is a namespace
branches
Tags

Configuration files are as follows:

     upstream vipapi {
        server vipapi-mall-com;     #正常情况这里放是会出错的，但是如果加了reslover就不会报错了，这里填写K8S的service名称即可
     }
     server {
        listen       80;
        server_name  vipapi.mall.com;
        access_log off;
        resolver 10.254.0.2;        #注意DNS解析的配置必须放在server下不能放在location下，否则无法解析
        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;
        }
     }