https://hex-go.github.io/tags/%E6%95%85%E9%9A%9C%E6%8E%92%E6%9F%A5/Recent content in 故障排查 on Hex BlogHugo -- gohugo.iozhhex-py@gmail.com (Hex)hex-py@gmail.com (Hex)©2026, All Rights ReservedTue, 29 Aug 2023 21:19:32 +0000https://hex-go.github.io/posts/kubernetes/2023-08-29-k8s%E9%83%A8%E7%BD%B2%E5%AE%9E%E5%BD%95-6-flannel%E7%89%88%E6%9C%AC%E4%B8%8E5.15%E5%86%85%E6%A0%B8%E4%B8%8D%E5%85%BC%E5%AE%B9%E5%AF%BC%E8%87%B4%E8%B7%A8%E8%8A%82%E7%82%B9pod%E6%97%A0%E6%B3%95%E9%80%9A%E4%BF%A1%E9%97%AE%E9%A2%98/Tue, 29 Aug 2023 21:19:32 +0000hex-py@gmail.com (Hex)Tue, 29 Aug 2023 21:19:32 +0000https://hex-go.github.io/posts/kubernetes/2023-08-29-k8s%E9%83%A8%E7%BD%B2%E5%AE%9E%E5%BD%95-6-flannel%E7%89%88%E6%9C%AC%E4%B8%8E5.15%E5%86%85%E6%A0%B8%E4%B8%8D%E5%85%BC%E5%AE%B9%E5%AF%BC%E8%87%B4%E8%B7%A8%E8%8A%82%E7%82%B9pod%E6%97%A0%E6%B3%95%E9%80%9A%E4%BF%A1%E9%97%AE%E9%A2%98/重要 Flannel v0.13.0 在 Linux 5.15 内核下，VXLAN 的 checksum offload 功能导致校验和计算错误，报文携带 bad udp cksum 被丢弃，跨节点 Pod 无法通信。 环境说明 OS: Ubuntu 22.04, 内核 5.15.0-79-generic rke v1.2.6, K8s v1.19.8, canal (flannel v0.13.0 + calico)HexFlannelKubernetes故障排查Kubernetesk8s部署实录https://hex-go.github.io/posts/kubernetes/2023-08-28-k8s%E9%83%A8%E7%BD%B2%E5%AE%9E%E5%BD%95-4-sudo%E6%8F%90%E6%9D%83echo%E5%90%8E%E7%9A%84%E9%87%8D%E5%AE%9A%E5%90%91%E6%93%8D%E4%BD%9C%E7%AC%A6%E4%BC%9A%E6%8A%A5%E6%9D%83%E9%99%90%E6%8B%92%E7%BB%9D%E9%94%99%E8%AF%AF/Mon, 28 Aug 2023 22:05:32 +0000hex-py@gmail.com (Hex)Mon, 28 Aug 2023 22:05:32 +0000https://hex-go.github.io/posts/kubernetes/2023-08-28-k8s%E9%83%A8%E7%BD%B2%E5%AE%9E%E5%BD%95-4-sudo%E6%8F%90%E6%9D%83echo%E5%90%8E%E7%9A%84%E9%87%8D%E5%AE%9A%E5%90%91%E6%93%8D%E4%BD%9C%E7%AC%A6%E4%BC%9A%E6%8A%A5%E6%9D%83%E9%99%90%E6%8B%92%E7%BB%9D%E9%94%99%E8%AF%AF/重要 sudo echo 'xxx' >> /etc/hosts 会报权限拒绝。原因：sudo 只作用于 echo，>> 重定向由当前 shell 以普通用户权限打开文件。 1.简介 Kubelet 集群部署时需要修HexSudoBash故障排查LinuxBashk8s部署实录https://hex-go.github.io/posts/kubernetes/2021-01-21-%E6%95%85%E9%9A%9C%E6%8E%92%E6%9F%A5--externaldns%E5%8F%AA%E5%BC%80%E6%94%BEudp53%E4%B8%8D%E5%BC%80%E6%94%BEtcp53%E5%AF%BC%E8%87%B4%E7%BD%91%E7%BB%9C%E8%B6%85%E6%97%B6/Thu, 21 Jan 2021 10:02:19 +0000hex-py@gmail.com (Hex)Thu, 21 Jan 2021 10:02:19 +0000https://hex-go.github.io/posts/kubernetes/2021-01-21-%E6%95%85%E9%9A%9C%E6%8E%92%E6%9F%A5--externaldns%E5%8F%AA%E5%BC%80%E6%94%BEudp53%E4%B8%8D%E5%BC%80%E6%94%BEtcp53%E5%AF%BC%E8%87%B4%E7%BD%91%E7%BB%9C%E8%B6%85%E6%97%B6/重要 DNS 协议在响应包超过 512 字节时，会自动切换到 TCP 传输。如果 DNS Server 只开放 UDP 53 端口，部分解析请求会被截断，客户端重试 TCP 超时后才会 fallback。 环HexKubernetesDNS故障排查Kubernetes