How is pull based auto scaling implemented in actions-runner-controller?

[EliPulsifer]

Hi,

I'm implementing a self-hosted runner solution in Azure and cannot use k8s. The only documented approach seems to be using a webhook. However, the actions-runner-controller uses a pull-based method which I prefer.

Is there any documentation on implementing this outside of the actions-runner-controller code base? Not being experienced with k8s or Go deciphering the code is difficult.

Specifically, I'd like to know what GitHub APIs are used and if/how long polling is used.

Thanks in advance!

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