nginx network_error ai_generated true

上游DNS解析超时

upstream DNS resolution timed out

ID: nginx/upstream-dns-resolution-timed-out

其他格式: JSON · Markdown 中文 · English
88%修复率
86%置信度
1证据数
2023-11-01首次发现

版本兼容性

版本状态引入弃用备注
nginx 1.18.0 active — — —
nginx 1.20.2 active — — —
nginx 1.22.1 active — — —
nginx 1.24.0 active — — —
nginx 1.25.3 active — — —

根因分析

Nginx无法解析上游主机名，原因是未配置解析器、DNS服务器不可达或主机名无效。

English

Nginx cannot resolve the upstream hostname because the resolver is not configured, the DNS server is unreachable, or the hostname is invalid.

generic

官方文档

http://nginx.org/en/docs/http/ngx_http_core_module.html#resolver

解决方案

  1. 在http块中配置有效的解析器：resolver 10.0.0.53 valid=10s;（替换为你的DNS服务器IP）
  2. 如果使用Docker，在docker-compose.yml中设置dns:或在docker run中添加--dns标志
  3. 检查 /etc/resolv.conf 并确保nginx具有到DNS服务器的网络访问权限

无效尝试

常见但无效的做法:

  1. 60% 失败

    If the server has no outbound internet access, public DNS won't work; need internal DNS.

  2. 40% 失败

    This bypasses DNS but makes the config brittle if IPs change; not a proper fix.

  3. 80% 失败

    If DNS is unreachable, timeout increase just delays the error.