Issue #52 grafana for prometheus

grafana for prometheus based on https://github.com/mrsiano/grafana-ocp

add-ons/grafana-prometheus/README.md

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+# Grafana Add-on
+
+This addon installs grafana for metrics visualization from prometheus
+
+## Prerequisites
+
+The prometheus addon is required
+
+```
+minishift addon install prometheus-3.7
+minishift addon apply prometheus-3.7 --addon-env namespace=kube-system
+```
+
+## Deploy grafana
+
+To deploy grafana do:
+
+```
+minishift addon apply grafana --addon-env namespace=grafana
+~/.minishift/addons/grafana-prometheus/setup-grafana.sh grafana
+```
+
+_NOTE_: namespace is a required environment variable for the add-on to run. Refer [addon-dynamic-variables](https://docs.openshift.org/latest/minishift/using/addons.html#addon-dynamic-variables) documentation.
+
+## Use grafana
+grafana will be available at:
+
+```
+minishift openshift service grafana-ocp -n grafana
+```
+
+After connecting to grafana, you should log as user: admin, password: admin
+
+## Delete grafana
+Delete grafana with:
+
+```
+oc delete project -n grafana --as=system:admin
+```

add-ons/grafana-prometheus/grafana-ocp.yaml

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+---
+kind: Template
+apiVersion: v1
+metadata:
+  name: grafana-ocp
+  annotations:
+    "openshift.io/display-name": Grafana ocp
+    description: |
+      Grafana server with patched Prometheus datasource.
+    iconClass: icon-cogs
+    tags: "metrics,monitoring,grafana,prometheus"
+parameters:
+- description: External URL for the grafana route
+  name: ROUTE_URL
+  value: ""
+- description: The namespace to instantiate heapster under. Defaults to 'grafana'.
+  name: NAMESPACE
+  value: grafana
+objects:
+- apiVersion: route.openshift.io/v1
+  kind: Route
+  metadata:
+    name: grafana-ocp
+    namespace: "${NAMESPACE}"
+  spec:
+    host: "${ROUTE_URL}"
+    to:
+      name: grafana-ocp
+- apiVersion: v1
+  kind: Service
+  metadata:
+    name: grafana-ocp
+    namespace: "${NAMESPACE}"
+    labels:
+      metrics-infra: grafana-ocp
+      name: grafana-ocp
+  spec:
+    selector:
+      name: grafana-ocp
+    ports:
+    - port: 8082
+      protocol: TCP
+      targetPort: grafana-http
+- apiVersion: v1
+  kind: ReplicationController
+  metadata:
+    name: grafana-ocp
+    namespace: "${NAMESPACE}"
+    labels:
+      metrics-infra: grafana-ocp
+      name: grafana-ocp
+  spec:
+    selector:
+      name: grafana-ocp
+    replicas: 1
+    template:
+      version: v1
+      metadata:
+        labels:
+          metrics-infra: grafana-ocp
+          name: grafana-ocp
+      spec:
+        volumes:
+        - name: data
+          emptyDir: {}
+        containers:
+        - image: "mrsiano/grafana-ocp:latest"
+          name: grafana-ocp
+          ports:
+          - name: grafana-http
+            containerPort: 3000
+          volumeMounts:
+          - name: data
+            mountPath: "/root/go/src/github.com/grafana/grafana/data"
+          command:
+          - "./bin/grafana-server"

add-ons/grafana-prometheus/grafana-prometheus.addon

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+# Name: grafana-prometheus
+# Description: This template adds grafana for displaying Openshift Metrics in its own namespace. If requires metrics and management-infra addon, to connect to hawkular-metrics on openshift.
+# Url: https://github.com/mrsiano/grafana-ocp
+# OpenShift-Version: >=3.7.0
+# Required-Vars: grafana_namespace
+
+# TODO: Once conditional commands are there, create the namespace if it does not exist
+oc adm new-project #{grafana_namespace}
+oc new-app -f grafana-ocp.yaml -n #{grafana_namespace}
+
+echo You have installed #{addon-name}
+echo To finish install run:
+echo   ~/.minishift/addons/grafana-prometheus/setup-grafana.sh #{grafana_namespace}
+echo
+echo To delete:
+echo     oc delete project -n #{grafana_namespace} --as=system:admin