The company I co-founded (Terrateam) develops a Terraform/OpenTofu GitOps CI/CD that focuses on GitHub. We use GitHub to run the operations, for a number of reasons, but we treat it just like ephemeral compute. We initiate the run, basically a near blank image, with our runner on it, and it "morphs" the image into what we need to do for that run. It works really well, except that GitHub Actions can be slow and I think they haven't quite figured out how to do reliable operations for it, yet.
The major thing about the API that I don't like is when you initiate a GHA run via the API, it does not give you an ID that you can use to track it. So if you initiate and it either never runs or fails for some reason prior to any code you put on the image, there is no good way to track that.
The major thing about the API that I don't like is when you initiate a GHA run via the API, it does not give you an ID that you can use to track it. So if you initiate and it either never runs or fails for some reason prior to any code you put on the image, there is no good way to track that.