feat: advanced secret and configmap refs in data sources

[pb82]

This removes the .spec.secrets field of data sources and replaces it with a more flexible solution relying on Secret and Config Map Key selectors and path based applying.

Thanks @addreas for the initial implementation, this is mostly based on your PR #999

[HVBE]

LGTM

[sathieu]

It would be great to have the same feature for dashboards.

This would allow to import configmaps matching specific labels, i.e:

apiVersion: v1
kind: ConfigMap
metadata:
  name: foobar
  labels:
    grafana_dashboard: '1'
# ...

like the grafana helm chart, see here.

[NissesSenap]

@sathieu we don't plan to support this feature. The CR does things for us and it would add a bunch of extra complexity.
We could on the other hand add s configmap that contains the json, and you would point to that cm from the CR. And we would be willing to accept that PR if you are up for it.

You can find an example of this in #999

This way you will have to write a short script that find the configmaps according to your label and create a CR for them, which should be rather straight forward.
I don't see any issues to even accept that script to this repo.

At the same time it's not that painful to do the same thing and just create a CR according to our standards.

[sathieu]

Thanks for your response @NissesSenap.

I don't think I'll be able to contribute such a big feature, which is probably as complex as this PR #1055.

[NissesSenap]

@sathieu feel free to create an issue around it and we will see how many other users that wants it.
And we will try to prioritize accordingly.

[rafilkmp3]

How can I add dashboards with the label grafana_dashboard: "1" using grafana-operator ?