Kubernetes Job Output metrics to Prometheus

Question

I want to create a Kubernetes Job object like the example: https://kubernetes.io/docs/concepts/workloads/controllers/job/

Now imagine I want to have the result (in this case the value of Pi: 3.14159...) available in Prometheus.

Is this possible?

In a more complex example, imagine the output of my pod was JSON:

{
  "foo": 200,
  "bar": 10,
  "baz": 999
}

I somehow need to denote that I'm interested in foo and baz "being available" in Prom (note I'm not opinionated on whether the solution is push or pull.

Option 1

The first option I've thought of is somehow attaching the result 3.14159 to the job and Prom can scrape it as normal.

Option 2

Don't run the Pi-generator container at all, instead run something like a Python script that runs the Pi process. Then we can push from Python to Prom.

Option 3

Some other way?