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Ingress Header Too Large

 1 year ago
source link: https://qingwave.github.io/ingress-header-too-large/
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Jun 5, 2020 · cloud

Ingress Header Too Large



线上遇到多次由 ingress header 过大引起的请求失败, 可能返回 502/400，解决方案如下。

502 – too big header

502 错误一般是后端服务不可用，但这里是 nginx-ingress 返回的，在 nginx-ingress 可看到如下日志： upstream sent too big header while reading response header from upstream, client...

需要在 ingress 配置如下参数

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/proxy-buffer-size: 128k #根据实际情况配置
    nginx.ingress.kubernetes.io/proxy-buffering: 'on'
    nginx.ingress.kubernetes.io/server-snippet: |
      large_client_header_buffers 16 128K;
      client_header_buffer_size 128k;

431/400 – too big header

http header 过大也有可能返回 400/431, 可按照上述调整，如果还是有问题需要检查后端服务的 header 设置，比如 golang http header 默认是1M; springboot 应用需要在application.properties加上server.max-http-header-size=32KB等

413 – too large body

如果返回 413，则超过了 body size 的限制（默认1M）, 可在 ingress annotation 添加 nginx.ingress.kubernetes.io/proxy-body-size: 8m


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