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WoMenQuNaJu/MeetSpot/postmortem/PM-2025-010.yaml
2026-02-04 16:11:55 +08:00

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id: PM-2025-010
created_at: '2026-01-13T05:57:29.616214Z'
source_commit: 9ebaacf
severity: high
title: 修复 Google Search Console 抓取超时问题
description: 由于 Render 冷启动导致 Google 爬虫超时,出现 GSC 'Couldn't fetch' 错误,影响了网站的 SEO 表现。
root_cause: Render 冷启动导致响应时间过长Google 爬虫无法及时获取 sitemap 和 robots.txt。
triggers:
files:
- api/routers/seo_pages.py
- .github/workflows/keep-alive.yml
functions:
- sitemap
- robots_txt
patterns:
- .*sitemap.*
- .*robots\.txt.*
- .*Cache-Control.*
- .*stale-while-revalidate.*
keywords:
- sitemap
- robots.txt
- Cache-Control
- stale-while-revalidate
- Googlebot
- Render cold start
fix_pattern:
approach: 通过增加缓存策略、提高 keep-alive 频率以及模拟 Googlebot 爬虫访问来解决冷启动问题。
key_changes:
- 为 sitemap.xml 和 robots.txt 添加长时间缓存策略max-age=86400, stale-while-revalidate=604800
- 提高 keep-alive 频率从 10 分钟到 5 分钟
- 为冷启动响应添加 --max-time 30 超时限制
- 模拟 Googlebot 爬虫访问以验证抓取可用性
verification:
- 检查 sitemap.xml 和 robots.txt 是否正确设置了 Cache-Control 头
- 验证 Cloudflare CDN 是否在冷启动期间提供缓存内容
- 通过 Google Search Console 验证爬虫抓取是否正常
- 模拟 Googlebot 爬虫访问,确保返回有效响应
- 检查 keep-alive 机制是否按预期运行
related:
files_changed:
- .github/workflows/keep-alive.yml
- api/routers/seo_pages.py
tags:
- seo
- api
- performance
- googlebot
- cache