feat: added extraObjects to Oathkeeper chart

[khusseini]

Related Issue or Design Document

Implements #753

Checklist

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• I have referenced an issue containing the design document if my change introduces a new feature.
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Further comments

[Demonsthere]

Hello there!
I don't have any issues with the feature, but I see how we could reuse it easier in other charts. Please ass the extra-manifest as a template to the https://github.com/ory/k8s/tree/master/helm/charts/ory-commons/templates library and we can easily include it from there. This will make reusing this much simpler :)

[khusseini]

@Demonsthere I moved the template to ory-commons helm chart templates folder. Sorry it took me a while to do this.

[Demonsthere]

a few things here, as this wont work this way. The ory-commons is a library chart, and doesnt have Values or manifests, but only functions like https://github.com/ory/k8s/blob/master/helm/charts/ory-commons/templates/_helpers.tpl#L4
You need to refactor the extra manifests into a template function, then add the library as a dependency to oathkeeper as in https://github.com/ory/k8s/blob/master/helm/charts/keto/Chart.yaml#L29
then you have access to the functions inside which can be called similar to https://github.com/ory/k8s/blob/master/helm/charts/keto/templates/deployment.yaml#L97

So in the end, you should have in oathkeeper the extra-manifests.yaml file with a structure similar to

{{- with .Values.extraObjects }}
{{ include "ory.generateExtraObjects" . }}
{{- end }}

[Demonsthere]

Hey there @khusseini no worries ;) I have written more details on how i think this change should be implemented. If you have any questions, please ping me 😉