docs: add GrafanaDashboard installation instructions (#148)

Author: shellwhale

README.md

@@ -15,6 +15,7 @@
   - [Install with Helm values](#install-with-helm-values)
   - [Install as ConfigMaps](#install-as-configmaps)
   - [Install as ConfigMaps with Terraform](#install-as-configmaps-with-terraform)
+  - [Install as GrafanaDashboard with Grafana Operator](#install-as-grafanadashboard-with-grafana-operator)
 - [Known issue(s)](#known-issues)
   - [Broken panels due to a too-high resolution](#broken-panels-due-to-a-too-high-resolution)
   - [Broken panels on k8s-views-nodes when a node changes its IP address](#broken-panels-on-k8s-views-nodes-when-a-node-changes-its-ip-address)
@@ -203,6 +204,80 @@ You will also need to enable and configure the Grafana `dashboards sidecar` as d
 
 *Note: no namespace is set by default, you can change that in the `kustomization.yaml` file.*
 
+### Install as GrafanaDashboard with Grafana Operator
+
+If you use Grafana Operator to provision your Grafana dashboards, you can use the following manifests:
+
+Make sure to use your proper namespace.
+
+```yaml
+apiVersion: grafana.integreatly.org/v1beta1
+kind: GrafanaDashboard
+metadata:
+  name: k8s-system-api-server
+  namespace: monitoring
+spec:
+  instanceSelector:
+    matchLabels:
+      dashboards: "grafana"
+  url: "https://raw.githubusercontent.com/dotdc/grafana-dashboards-kubernetes/master/dashboards/k8s-system-api-server.json"
+---
+apiVersion: grafana.integreatly.org/v1beta1
+kind: GrafanaDashboard
+metadata:
+  name: k8s-system-coredns
+  namespace: monitoring
+spec:
+  instanceSelector:
+    matchLabels:
+      dashboards: "grafana"
+  url: "https://raw.githubusercontent.com/dotdc/grafana-dashboards-kubernetes/master/dashboards/k8s-system-coredns.json"
+---
+apiVersion: grafana.integreatly.org/v1beta1
+kind: GrafanaDashboard
+metadata:
+  name: k8s-views-global
+  namespace: monitoring
+spec:
+  instanceSelector:
+    matchLabels:
+      dashboards: "grafana"
+  url: "https://raw.githubusercontent.com/dotdc/grafana-dashboards-kubernetes/master/dashboards/k8s-views-global.json"
+---
+apiVersion: grafana.integreatly.org/v1beta1
+kind: GrafanaDashboard
+metadata:
+  name: k8s-views-namespaces
+  namespace: monitoring
+spec:
+  instanceSelector:
+    matchLabels:
+      dashboards: "grafana"
+  url: "https://raw.githubusercontent.com/dotdc/grafana-dashboards-kubernetes/master/dashboards/k8s-views-namespaces.json"
+---
+apiVersion: grafana.integreatly.org/v1beta1
+kind: GrafanaDashboard
+metadata:
+  name: k8s-views-nodes
+  namespace: monitoring
+spec:
+  instanceSelector:
+    matchLabels:
+      dashboards: "grafana"
+  url: "https://raw.githubusercontent.com/dotdc/grafana-dashboards-kubernetes/master/dashboards/k8s-views-nodes.json"
+---
+apiVersion: grafana.integreatly.org/v1beta1
+kind: GrafanaDashboard
+metadata:
+  name: k8s-views-pods
+  namespace: monitoring
+spec:
+  instanceSelector:
+    matchLabels:
+      dashboards: "grafana"
+  url: "https://raw.githubusercontent.com/dotdc/grafana-dashboards-kubernetes/master/dashboards/k8s-views-pods.json"
+```
+
 ## Known issue(s)
 
 ### Broken panels due to a too-high resolution