Issue #40 Update prometheus add-on README to use admin user to login …

…with

add-ons/prometheus/README.md

@@ -1,30 +1,37 @@
 # Prometheus Add-on
-An addon that will deploy Prometheus.
+An add-on that will deploy [Prometheus](https://prometheus.io/) on the OpenShift cluster provided by [Minishift](https://github.com/minishift/minishift).
 
-NOTE: Requires Origin >= 3.6.0-rc.0
+## Prerequisites
 
-Verify you have installed these addons, by following the [general readme](../../README.adoc#download-and-use-community-add-ons).
+- Origin version >= 3.6.0
+- A _cluster-admin_ user which is required to access Prometheus web UI.
 
-## Deploy prometheus
-To deploy prometheus do:
+_NOTE_: [`admin-user`](https://github.com/minishift/minishift/tree/master/addons/admin-user) add-on provides a way to create _admin_ user with _cluster-admin_ role
+
+Verify that you have installed the add-on by following [general readme](../../README.adoc#download-use-community-addons).
+
+## Deploy Prometheus
+To deploy Prometheus do:
 
 ```
 minishift addon apply prometheus --addon-env namespace=kube-system
 ```
 
-_NOTE_: You should provide the namespace where it will be installed with the addon-env namespace, like this:
+## Use Prometheus
 
-## Use prometheus
-Prometheus will be available at:
+- Prometheus will be available at:
 
-```
-$ minishift openshift service prometheus -n <namespace>
-```
+  ```
+  $ minishift openshift service prometheus -n kube-system
+  ```
+
+  _NOTE_: There service is exposed though SSL, so use _https_ to access it.
+
+- Login with cluster-admin user in OpenShift console during `Sign in with a Account` action.
 
-_NOTE_: There service is exposed though SSL, so use https to access it.
 
-## Delete prometheus
-Delete prometheus with:
+## Delete Prometheus
+Delete Prometheus with:
 
 ```
 oc delete sa,clusterrolebinding,route,svc,secret,deployment,configmap -l app=prometheus -n <namespace> --as=system:admin