是否存在用于访问给定已部署云功能的版本号的变量 [英] Is there a variable for accessing the version number for a given deployed cloud function

问题描述

GCP在控制台中显示已部署的云功能的版本号.目前，没有系统环境变量，其中包含有关以下内容的信息:部署-没有版本，也没有部署日期.

GCP displays the version number of a deployed cloud function in the console. At the moment there isn't a system environment variable which contains information about the deployment - there is no version, nor deployment date.

鉴于版本更新需要相当长的时间来更新(30秒以上)并进行传播，因此使用这些版本信息将非常有用.

Given that version updates take considerable time to update (30 seconds +) and propagate, such version information would be useful to wield.

推荐答案

最近发布的nodejs10运行时环境现在包括一个 正式记录的环境变量 K_REVISION包含云功能的部署版本.

The recently-released nodejs10 runtime environment now includes an officially documented environment variable K_REVISION that contains the deployment version of a cloud function.

从检查来看，似乎还存在python37和较旧的nodejs8环境 包含一个非官方的环境变量X_GOOGLE_FUNCTION_VERSION 恰好包含部署版本.

From inspection, it also seems that the python37 and older nodejs8 environments include an unofficial environment variable X_GOOGLE_FUNCTION_VERSION that happens to contain the deployment version.

此代码段适用于nodejs10，非官方适用于nodejs8:

This snippet works on nodejs10 and unofficially works on nodejs8:

exports.helloVersion = (req, res) => {
  console.log(process.env);
  const version = process.env.K_REVISION || process.env.X_GOOGLE_FUNCTION_VERSION || "UNKNOWN";
  console.log(`Running version ${version}`);
  res.status(200).send(`Running version ${version}\n`)
};

部署和测试:

$ gcloud functions deploy helloVersion --runtime nodejs8 --trigger-http
versionId: '8'
$ curl https://us-central1-myproject.cloudfunctions.net/helloVersion
Running version 8

$ gcloud functions deploy helloVersion --runtime nodejs10 --trigger-http
versionId: '9'
$ curl https://us-central1-myproject.cloudfunctions.net/helloVersion
Running version 9

当然，nodejs10上的K_REVISION环境变量可能是 考虑到官方文档中提到的方法. X_GOOGLE_FUNCTION_VERSION环境变量不是正式的 提到，所以依靠它来做一些重要的事情可能不是一个好主意， 但我发现机会性地展示或包括可能会有所帮助 进行交互式调试，部署和测试时.

Of course, the K_REVISION environment variable on nodejs10 is probably the way to go, given that it's mentioned in the official documentation. The X_GOOGLE_FUNCTION_VERSION environment variable isn't officially mentioned, so it's probably a bad idea to rely on it for something important, but I've found that it might be helpful to display or include opportunistically when debugging, deploying, and testing interactively.

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