如何使用反向代理將所有請求正確重定向到 nginx 內的非 www

我有一個由 nginx 內部的反向代理服務的反應網站。最重要的是，我有 SSL。Certbot 正在處理從 http 到 https 的重定向。我還想設置從 www 到非 www 的重定向。我想知道這樣做的正確方法是什麼？

我的配置如下所示：

server {
   server_name example.com www.example.com;
   location / {
       proxy_pass http://localhost:8000;
       proxy_http_version 1.1;
       proxy_set_header Upgrade $http_upgrade;
       proxy_set_header Connection 'upgrade';
       proxy_set_header Host $host;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Forwarded-Proto http;
       proxy_set_header X-Forwarded-For $remote_addr;
       proxy_set_header X-Forwarded-Host $remote_addr;
       proxy_cache_bypass $http_upgrade;
       proxy_hide_header X-Powered-By;
       add_header Strict-Transport-Security "max-age=63072000; includeSubDomains" always;
       add_header X-Frame-Options "SAMEORIGIN" always;
       add_header X-XSS-Protection "1; mode=block" always;
       add_header X-Content-Type-Options "nosniff" always;
       add_header Referrer-Policy "origin-when-cross-origin" always;
   }
   error_page 502 /index.html;
   location /index.html {
       root /var/www/subdomains/service;
   }

   listen 443 ssl; # managed by Certbot
   ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
   ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot
   include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
   ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

server {
   if ($host = example.com) {
       return 301 https://$host$request_uri;
   } # managed by Certbot

   if ($host = www.example.com) {
       return 301 https://example.com$request_uri;
   }

   server_name example.com;
   listen 80;
   return 404; # managed by Certbot
}

請注意，兩個頁面（www 和非 www）目前都在工作。我只是想避免重複連結，所以我只想要非 www 版本。

將您的 SSL 伺服器塊分成兩部分：

server {
   server_name www.example.com;
   listen 443 ssl; # managed by Certbot
   ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
   ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot
   include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
   ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
   return 301 https://example.com$request_uri;
}
server {
   server_name example.com;
   ... # your main config here
}

引用自：https://serverfault.com/questions/945662