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#cloudflare #事故回顾
Cloudflare 2021年12月17日事故回顾
省流:大批量rollback导致addressing API超时
-> 更新QuickSliver(某种Redis类似物)的cronjob脚本出错
-> QuickSliver 相关的 key 是空值
-> 空值爆破了 dosd (分析流量特征来更新恶意流量指纹的守护进程)
-> frontline(第一层DDoS防御机制) 检测意外依赖了 dosd 导致所有流量无法通过。

事故教训:
1. 写bash脚本之前三思,或者干脆不要用bash写脚本;
2. Rust的 match 不是让你用来 unwrap() 的;
3. 对于某些服务,想清楚是 fail close 还是 fail open;
4. 各类API的metric要记录好方便事后找问题。
Youtube介绍



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#cloudflare #事故回顾
Cloudflare 2021年12月17日事故回顾
省流:大批量rollback导致addressing API超时
-> 更新QuickSliver(某种Redis类似物)的cronjob脚本出错
-> QuickSliver 相关的 key 是空值
-> 空值爆破了 dosd (分析流量特征来更新恶意流量指纹的守护进程)
-> frontline(第一层DDoS防御机制) 检测意外依赖了 dosd 导致所有流量无法通过。

事故教训:
1. 写bash脚本之前三思,或者干脆不要用bash写脚本;
2. Rust的 match 不是让你用来 unwrap() 的;
3. 对于某些服务,想清楚是 fail close 还是 fail open;
4. 各类API的metric要记录好方便事后找问题。
Youtube介绍

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Emerson Brooking, a disinformation expert at the Atlantic Council's Digital Forensic Research Lab, said: "Back in the Wild West period of content moderation, like 2014 or 2015, maybe they could have gotten away with it, but it stands in marked contrast with how other companies run themselves today." And while money initially moved into stocks in the morning, capital moved out of safe-haven assets. The price of the 10-year Treasury note fell Friday, sending its yield up to 2% from a March closing low of 1.73%. Apparently upbeat developments in Russia's discussions with Ukraine helped at least temporarily send investors back into risk assets. Russian President Vladimir Putin said during a meeting with his Belarusian counterpart Alexander Lukashenko that there were "certain positive developments" occurring in the talks with Ukraine, according to a transcript of their meeting. Putin added that discussions were happening "almost on a daily basis." The S&P 500 fell 1.3% to 4,204.36, and the Dow Jones Industrial Average was down 0.7% to 32,943.33. The Dow posted a fifth straight weekly loss — its longest losing streak since 2019. The Nasdaq Composite tumbled 2.2% to 12,843.81. Though all three indexes opened in the green, stocks took a turn after a new report showed U.S. consumer sentiment deteriorated more than expected in early March as consumers' inflation expectations soared to the highest since 1981. "We're seeing really dramatic moves, and it's all really tied to Ukraine right now, and in a secondary way, in terms of interest rates," Octavio Marenzi, CEO of Opimas, told Yahoo Finance Live on Thursday. "This war in Ukraine is going to give the Fed the ammunition, the cover that it needs, to not raise interest rates too quickly. And I think Jay Powell is a very tepid sort of inflation fighter and he's not going to do as much as he needs to do to get that under control. And this seems like an excuse to kick the can further down the road still and not do too much too soon."
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