feat: Add service monitor on helm chart

[mmadoo]

Allow configuration of service monitor in order to have metrics collected by an external prometheus

Signed-off-by: Nicolas Trangosi nicolas.trangosi@dcbrain.com

[mmadoo]

Is it possible to have a feedback on this PR ?
If it is accepted, I could create new pull requests on the helm part of this project.

[bpetit]

Thanks a lot ! merging !

[damienvergnaud]

Oops, i missed this, 1 hour too late,

Having the ability to add labels on this service-monitor object from the values of the chart would help configuration with already existing prometheus stack.

For example the kubernetes-prometheus stack (install Prom + Prom-operator + Grafana headless)
Will automatically grab service-monitor objects with this label :

labels:
  release: prometheus-stack

I'll love to engage with you on further PR @mmadoo you may ping me 👍

[mmadoo]

I'll love to engage with you on further PR @mmadoo you may ping me 👍
@damienvergnaud I will try to work on this next week. I have other modifcations I would like to add on helm chart, but I was waiting for this PR to be merged.