<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>故障排查 on 正能量</title><link>https://www.znl.net/tags/%E6%95%85%E9%9A%9C%E6%8E%92%E6%9F%A5/</link><description>Recent content in 故障排查 on 正能量</description><generator>Hugo -- gohugo.io</generator><language>zh-CN</language><copyright>© 2026 正能量</copyright><lastBuildDate>Tue, 20 Oct 2026 12:27:42 +0800</lastBuildDate><atom:link href="https://www.znl.net/tags/%E6%95%85%E9%9A%9C%E6%8E%92%E6%9F%A5/index.xml" rel="self" type="application/rss+xml"/><item><title>Kubernetes 控制器为何读到旧状态：缓存一致性与排查</title><link>https://www.znl.net/posts/k8s-controller-staleness/</link><pubDate>Tue, 28 Apr 2026 00:00:00 +0800</pubDate><guid>https://www.znl.net/posts/k8s-controller-staleness/</guid><description>控制器已经创建对象，却暂时还没从缓存看到它，可能导致错误判断。沿着副本数量的变化梳理读写时间差，可以分清缓存落后、更新冲突和业务幂等问题。</description><media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://www.znl.net/posts/k8s-controller-staleness/featured.png"/></item><item><title>DNS 服务在线，为何仍无法解析：从 1.1.1.1 路由故障说起</title><link>https://www.znl.net/posts/dns-routing-failure/</link><pubDate>Tue, 15 Jul 2025 00:00:00 +0800</pubDate><guid>https://www.znl.net/posts/dns-routing-failure/</guid><description>分清解析器、任播节点与网络路径，通过固定域名的默认查询、指定解析器和 TCP 查询逐层对照，再检查代理与配置生效范围。</description><media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://www.znl.net/posts/dns-routing-failure/featured.png"/></item><item><title>从 Cloudflare 故障看共享依赖：缓存、重试与降级边界</title><link>https://www.znl.net/posts/shared-dependency-failures/</link><pubDate>Thu, 12 Jun 2025 00:00:00 +0800</pubDate><guid>https://www.znl.net/posts/shared-dependency-failures/</guid><description>识别多个服务背后的共享故障域，分别检查缓存命中、回源、重试和恢复流量，并按数据语义决定哪些功能可以降级。</description><media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://www.znl.net/posts/shared-dependency-failures/featured.png"/></item></channel></rss>