使用 nginx-proxy 将根域名重定向到 www.{host}

第一步，将 @ 根域名，解析到与 www 为公一个服务器 IP

第二步，修改服务部署，添加跟域名

version: '3.1'

services:
  server:
    ....
    environment:
      VIRTUAL_HOST: example.com, www.example.com
      VIRTUAL_PORT: 8080
      LETSENCRYPT_HOST: example.com, www.example.com
    ......

❯ curl -I http://example.com
HTTP/1.1 301 Moved Permanently
Content-Length: 169
Content-Type: text/html
Date: Thu, 02 Nov 2023 02:03:49 GMT
Location: https://example.com/
Server: nginx/1.21.4

❯ curl -I https://example.com
HTTP/2 200
server: nginx/1.21.4
date: Thu, 02 Nov 2023 02:03:56 GMT
content-type: text/html; charset=utf-8
content-length: 64025
x-powered-by: Express
cache-control: public, max-age=0
etag: W/"fa19-6y7vfdU9YnEXWxUatndF22dWJsM"
vary: Accept-Encoding
strict-transport-security: max-age=31536000

根域名能正常使用，我们需要将它转到 www.example.com 而不是直接响应，需要覆盖 example.com 的 location 配置。

看看 nginx-proxy 的配置映射目录

    volumes:
      - ./certs:/etc/nginx/certs:ro
      - ./conf.d:/etc/nginx/conf.d
      - ./vhost.d:/etc/nginx/vhost.d
      - ./html:/usr/share/nginx/html
      - ./htpasswd:/etc/nginx/htpasswd

需要再 vhost.d 中创建 `example.com_location_override` 文件。文件内容如下

location / {
    return 301 https://www.example.com$request_uri;
}

最后重启一下 nginx-proxy

docker restart nginx-proxy

检测结果

❯ curl -I https://example.com
HTTP/2 301
server: nginx/1.23.4
date: Thu, 02 Nov 2023 03:17:53 GMT
content-type: text/html
content-length: 169
location: https://www.example.com/
strict-transport-security: max-age=31536000

完成