问题描述

运行在Azure中的Function App，最近出现偶发的证书加载错误。

错误信息：We get an error in function app. Exception: OSError: Could not find a suitable TLS CA certificate bundle, invalid path: /home/site/wwwroot/.python_packages/lib/site-packages/certifi/cacert.pem
This issue happened by chance. This appears to be a platform issue with Function Apps running on Linux OS via dedicated App Service plan SKUs. Refer to Link: https://learn.microsoft.com/en-us/answers/questions/1192437/azure-function-error-could-not-find-a-suitable-tls

想知道是什么情况会导致这个错误呢？

问题解答

查看了错误信息中的链接文档，从中其实最关键的一句话就是：

In rare scenarios, this mounting process can be disrupted intermittently by the underlying OS and other components in the platform, which might ultimately result in the error above about missing content/certs, etc.

在极少数情况下，此挂载过程可能会被平台中的底层作系统和其他组件间歇性中断，这最终可能导致上述有关缺少内容/证书等的错误。

但是，在当前遇见的情况中，最后通过查看Function App的CPU和Memory，发现它们的占用率都达到了100%，所以在加载文件的过程中，就非常高概率出现load file failed。导致错误: Could not find a suitable TLS CA certificate bundle, invalid path: /home/site/wwwroot/.python_packages/lib/site-packages/certifi/cacert.pem 错误。

当在复杂的环境中面临问题，格物之道需：浊而静之徐清，安以动之徐生。 云中，恰是如此!