Add grafana dashboards for prometheus operator

[mfilotto]

It would be nice if grafana dasboards could be added though ConfigMap as it is done in https://github.com/helm/charts/tree/master/stable/prometheus-operator

[mumrau]

I would like to upvote this feature.
I'm currently implementing and deploying in a production ready cluster prometheus and the whole monitoring stack, this would be really helpful.
I won't have time in the near future to handle it, but if we decide kube-eagle is our way to go, I would potentially make a PR that would solve the issue.

[weeco]

I'd accept a PR for this, but I don't have intentions to submit the PR myself. I can help by answering questions though.

[botzill]

I solve this by adding the following config into prom-operator:

grafana:
  ...
  dashboards:
    public:
      kube-eagle:
        gnetId: 9871
        revision: 2
        datasource: Prometheus

So, it will automatically take the dashboard from https://grafana.com/dashboards.