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How do I tell if my process is running in a Google Cloud Function?

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    Not sure if there's a in-built property, but you can always initialize your function with some env and check for that. Commented Jun 15, 2020 at 13:13

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I have 2 checks in mind:

  • Firstly, if the Cloud Function env variables are set (your other question)
  • Secondly, you can check if the metadata server answer by performing a get request to it. Don't forget the header (Metadata-flavor: google). If you get a Http status code 404, you aren't on Cloud Function.
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I am running NodeJS 10 so I am using if (process.env.K_SERVICE). Also for whoever comes later, __filename does not give the service name.

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