Add instructions for new dashboards in the Grafana helm chart README (#1408)

* Add example for adding grafana dashboards in README

helm/grafana/Chart.yaml

@@ -8,4 +8,4 @@ maintainers:
 name: grafana
 sources:
 - https://github.com/coreos/prometheus-operator
-version: 0.0.33
+version: 0.0.34

helm/grafana/README.md

@@ -74,3 +74,48 @@ $ helm install coreos/grafana --name my-release -f values.yaml
 > **Tip**: You can use the default [values.yaml](values.yaml)
 
 > **Tip**: On GCE If you want to  use  `Ingress.enabled=true`, you must put `service.type=NodePort`
+
+## Adding Grafana Dashboards
+
+You can either add new dashboards via `serverDashboardConfigmaps` in `values.yaml`. These can then be
+picked up by Grafana Watcher.
+
+```yaml
+serverDashboardConfigmaps:
+  - example-dashboards
+```
+
+```yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: example-dashboards
+data:
+{{ (.Files.Glob "custom-dashboards/*.json").AsConfig | indent 2 }}
+
+# Or
+#
+# data:
+#   custom-dashboard.json: |-
+# {{ (.Files.Get "custom.json") | indent 4 }}
+#
+# The filename (and consequently the key under data) must be in the format `xxx-dashboard.json` or `xxx-datasource.json`
+# for them to be picked up.
+```
+
+Another way is to add them through `serverDashboardFiles` directly in `values.yaml`. These are then combined
+into the same ConfigMap for the rest of the default dashboards.
+
+```yaml
+serverDashboardFiles:
+  example-dashboard.json: |-
+    {
+      "dashboard": {
+        "annotations:[]
+        ...
+      }
+    }
+```
+
+In both cases, if you're exporting the jsons directly from Grafana, you'll want to wrap it in `{"dashboard": {}}`
+as stated in [Grafana Watcher's README](https://github.com/coreos/prometheus-operator/tree/master/contrib/grafana-watcher).

helm/kube-prometheus/Chart.yaml

@@ -7,4 +7,4 @@ maintainers:
 name: kube-prometheus
 sources:
   - https://github.com/coreos/prometheus-operator
-version: 0.0.78
+version: 0.0.79

helm/kube-prometheus/requirements.yaml

@@ -59,7 +59,7 @@ dependencies:
     condition: deployExporterNode
 
   - name: grafana
-    version: 0.0.33
+    version: 0.0.34
     #e2e-repository: file://../grafana
     repository: https://s3-eu-west-1.amazonaws.com/coreos-charts/stable/
     condition: deployGrafana