如何在 CentOS 上將子域重定向到 Nginx 中的根域？

我將 Centos 與 Nginx 和 Puma 一起使用。我想將所有子域重定向到我的主根域，所以我按照這裡的說明進行操作 - https://stackoverflow.com/questions/26801479/nginx-redirect-all-subdomains-to-main-domain。但是我無法讓它工作。下面是我的配置

upstream projecta {
 server unix:///home/rails/projecta_production/shared/sockets/puma.sock;
}

server {
 listen 80;
 server_name mydomein.com;
 return 301 http://mydomein.com$request_uri;
 root /home/rails/projecta_production/public; # I assume your app is located at this location

 location / {
   proxy_pass http://projecta; # match the name of upstream directive which is defined above
   proxy_set_header Host $host;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 }

 location ~* ^/assets/ {
   # Per RFC2616 - 1 year maximum expiry
   expires 1y;
   add_header Cache-Control public;

   # Some browsers still send conditional-GET requests if there's a
   # Last-Modified header or an ETag header even if they haven't
   # reached the expiry date sent in the Expires header.
   add_header Last-Modified "";
   add_header ETag "";
   break;
 }
}

如果我排除“return 301 http://mydomein.com $request_uri;” 行，那麼我的站點將在根域上執行，但不能在任何子域上執行（例如，查看子域將產生預設的 Nginx 索引頁面）。如何將所有子域重定向到我的主域並保留我的 Rails/Puma 配置？

您目前正在頂級域 vhost 上偵聽重定向。您需要做的是有一個單獨的 vhost 監聽器重定向到頂點。這是重定向到頂點域定義的萬用字元偵聽器的範例：

upstream projecta {
 server unix:///home/rails/projecta_production/shared/sockets/puma.sock;
}

# Listener for all subdomains
server {
 listen 80;
 server_name *.mydomein.com;
 # If you want to redirect all requests, not just subdomains, use below config instead.
 # server_name _;
 return 301 http://mydomein.com$request_uri;
}

# Listener for Apex Domain
server {
 listen 80;
 server_name mydomein.com;
 root /home/rails/projecta_production/public; # I assume your app is located at this location

 location / {
   proxy_pass http://projecta; # match the name of upstream directive which is defined above
   proxy_set_header Host $host;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 }

 location ~* ^/assets/ {
   # Per RFC2616 - 1 year maximum expiry
   expires 1y;
   add_header Cache-Control public;

   # Some browsers still send conditional-GET requests if there's a
   # Last-Modified header or an ETag header even if they haven't
   # reached the expiry date sent in the Expires header.
   add_header Last-Modified "";
   add_header ETag "";
   break;
 }
}

引用自：https://serverfault.com/questions/899367