kubernetes network_error ai_generated partial

来自服务器的错误：拨号后端时出错：拨号 tcp 10.0.0.5:10250：连接：连接被拒绝

Error from server: error dialing backend: dial tcp 10.0.0.5:10250: connect: connection refused

ID: kubernetes/exec-in-pod-failed-unable-to-upgrade-connection

其他格式: JSON · Markdown 中文 · English
75%修复率
80%置信度
1证据数
2024-01-20首次发现

版本兼容性

版本状态引入弃用备注
kubectl v1.27.0 active — — —
kubelet v1.27.0 active — — —
kubelet v1.29.0 active — — —
Kubernetes v1.28.0 active — — —

根因分析

节点上的 kubelet 未在预期端口（10250）上监听，或因网络问题无法访问，导致 kubectl exec/attach/logs 失败。

English

The kubelet on the node is not listening on the expected port (10250) or is unreachable due to network issues, preventing kubectl exec/attach/logs.

generic

官方文档

https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/

解决方案

  1. SSH 到节点并重启 kubelet：`ssh node-user@node-ip 'sudo systemctl restart kubelet'`。
  2. 检查 kubelet 是否在运行并在正确端口上：`ssh node-user@node-ip 'sudo netstat -tulpn | grep 10250'`。如果没有，检查 kubelet 配置中的 `--port` 参数。
  3. 如果防火墙阻止，检查网络策略或云防火墙规则是否允许从控制平面到节点端口 10250 的流量。

无效尝试

常见但无效的做法:

  1. Restarting the pod, assuming it's a container issue 90% 失败

    The error is node-level, not pod-level; restarting the pod won't fix kubelet connectivity.

  2. Checking pod logs via kubectl logs, which also fails with the same error 80% 失败

    All kubectl commands that require kubelet interaction (exec, logs, attach) will fail identically.