feat: add resource information to pod annotations

[lorenzo-cavazzi]

It should be easy to add a couple of extra annotations to the pods about the environment resources/options selected during the start phase. These could be added to the /servers endpoint and be used by the UI to give extra information (e.g. number of GPU available)

[rokroskar]

You could get the same information from the k8s api, no? I don't think going through pod annotations for determining resource availability is the way to go. Or am I misunderstanding the intent?

[lorenzo-cavazzi]

This is to easily recover the options chosen by the user at start time (e.g. 2 cpu/1gpu) and use them in the UI, not determining the overall resource availability (that is addressed by #222).

Anyway, I guess you are totally right, I don't need to add any extra annotation since all the information seems to be already available when invoking kubectl describe. Then it's just a matter of adding the missing information in the /servers api 🙂

[rokroskar]

yes, when you retrieve the pod you can (should) get all of those options, afaik. I wouldn't add them to annotations unless there is something very renku-specific and not related to the characteristics of the pod.