Nginx反向代理+Apache2部署WordPress重定向至localhost问题求助

问题描述 #

在example.com/wordpress/子目录安装WordPress后，访问http://example.com/wordpress/会被重定向到https://localhost/wordpress/。已修改数据库wp_options表的siteurl和home字段为http://example.com/wordpress/，但问题仍未解决。

当前环境配置 #

Nginx反向代理配置（监听80、443端口） #

server {
    server_name example.com;
    location / {
            proxy_pass       http://localhost:8080;
    }

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

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

Apache2配置（监听8080端口） #

<VirtualHost *:8080>

    DocumentRoot "/var/www/example.com"
    ServerName example.com

    <Directory "/var/www/example.com">
        Options MultiViews FollowSymlinks
        AllowOverride All
        Order allow,deny
        Allow from all
    </Directory>

    TransferLog /var/log/apache2/nextcloud_access.log
    ErrorLog /var/log/apache2/nextcloud_error.log

</VirtualHost>

解决步骤 #

1. 补全Nginx代理请求头部 #

Apache后端无法获取真实的客户端请求域名和协议，导致WordPress生成错误重定向地址。在Nginx的location /块中添加以下代理头部：

location / {
    proxy_pass       http://localhost:8080;
    # 新增以下配置
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
}

• Host $host：让Apache识别真实请求域名example.com，而非localhost:8080
• X-Forwarded-Proto $scheme：告知WordPress当前请求使用的是HTTP/HTTPS协议

2. 配置Apache信任代理请求 #

确保Apache启用mod_remoteip模块（执行a2enmod remoteip后重启Apache），并在VirtualHost中添加以下配置：

<VirtualHost *:8080>
    # 原有配置...
    
    RemoteIPHeader X-Forwarded-For
    RemoteIPInternalProxy 127.0.0.1
    UseCanonicalName Off
</VirtualHost>

• UseCanonicalName Off：禁用Apache自动生成规范域名重定向，强制使用请求中的Host头部

3. 强制WordPress使用正确地址 #

在WordPress的wp-config.php文件中添加以下代码，直接指定站点地址：

define('WP_HOME', 'https://example.com/wordpress/');
define('WP_SITEURL', 'https://example.com/wordpress/');
define('FORCE_SSL_ADMIN', true);

// 适配反向代理下的SSL检测
if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https') {
    $_SERVER['HTTPS'] = 'on';
}

4. 清理缓存 #

修改配置后，清空浏览器缓存（快捷键Ctrl+Shift+Delete），若使用WordPress缓存插件，需同时清空插件缓存，避免旧规则残留。

内容的提问来源于stack exchange，提问作者Steve