I'm in a project and I ran out of ideas... I have an instance of google tag manager server side running, and I want to send data to my cloud function. I've manage to do it through HTTP request but I would like to use cloud function triggered by pub/sub and how to do it? I need to send a pub/sub message from GTM server. Does anyone did it? Is There any kind of integration that I'm not aware?
Any input on that matter is much appreciated!
It isn't currently possible. There's no API yet: https://developers.google.com/tag-platform/tag-manager/server-side/api
As the other links have stated, you can send your request to a cloud function using HTTP which then sends the Pub-sub message, this means you're paying for the cloud function execution as well as using Pub-sub.
Hopefully, we'll get the API soon that allows us to call Pub-sub directly.