fix: proxy admin via A public host, ClusterIP port 80 refused [deploy]

nginx.conf

@@ -4,30 +4,28 @@ server {
   root /usr/share/nginx/html;
   index index.html;
 
-  # 入口脚本写入集群 DNS；变量 proxy_pass 必须配合 resolver
   resolver __RESOLVER__ valid=10s ipv6=off;
 
-  # B 站自身探针，不转发
   location = /api/health {
     default_type text/plain;
     add_header Content-Type text/plain;
     return 200 "ok";
   }
 
-  # Admin + Next 静态资源 + 其余 API（含 /api/admin、/api/contact、Server Actions）
   location /admin {
     set $a_upstream __A_UPSTREAM__;
     proxy_pass $a_upstream$request_uri;
     proxy_http_version 1.1;
     proxy_ssl_server_name on;
-    proxy_set_header Host $host;
+    proxy_set_header Host __A_HOST__;
     proxy_set_header X-Forwarded-Host $host;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header Cookie $http_cookie;
     proxy_pass_header Set-Cookie;
-    proxy_redirect __A_PUBLIC__/ /;
+    proxy_redirect https://__A_HOST__/ /;
+    proxy_redirect http://__A_HOST__/ /;
   }
 
   location /_next/ {
@@ -35,11 +33,12 @@ server {
     proxy_pass $a_upstream$request_uri;
     proxy_http_version 1.1;
     proxy_ssl_server_name on;
-    proxy_set_header Host $host;
+    proxy_set_header Host __A_HOST__;
     proxy_set_header X-Forwarded-Host $host;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header Cookie $http_cookie;
   }
 
   location /api/ {
@@ -47,23 +46,23 @@ server {
     proxy_pass $a_upstream$request_uri;
     proxy_http_version 1.1;
     proxy_ssl_server_name on;
-    proxy_set_header Host $host;
+    proxy_set_header Host __A_HOST__;
     proxy_set_header X-Forwarded-Host $host;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header Cookie $http_cookie;
     proxy_pass_header Set-Cookie;
+    proxy_redirect https://__A_HOST__/ /;
+    proxy_redirect http://__A_HOST__/ /;
   }
 
-  # 前台 embed 资源
   location /embed/ {
     set $a_upstream __A_UPSTREAM__;
     proxy_pass $a_upstream$request_uri;
     proxy_http_version 1.1;
     proxy_ssl_server_name on;
-    proxy_set_header Host $host;
-    proxy_set_header X-Forwarded-Host $host;
+    proxy_set_header Host __A_HOST__;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
@@ -74,8 +73,7 @@ server {
     proxy_pass $a_upstream$request_uri;
     proxy_http_version 1.1;
     proxy_ssl_server_name on;
-    proxy_set_header Host $host;
-    proxy_set_header X-Forwarded-Host $host;
+    proxy_set_header Host __A_HOST__;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;