update prometheus example

contrib/prometheus/README.md

@@ -43,9 +43,9 @@ Now, you can access the service `wget 10.0.1.89:9090`, and build graphs.
 
 ## How it works
 
-This is a v1beta3 based, containerized prometheus ReplicationController, which scrapes endpoints which are readable on the KUBERNETES_RO service (the internal kubernetes service running in the default namespace, which is visible to all pods).
+This is a v1beta3 based, containerized prometheus ReplicationController, which scrapes endpoints which are readable on the KUBERNETES service (the internal kubernetes service running in the default namespace, which is visible to all pods).
 
-1. The KUBERNETES_RO service is already running : providing read access to the API metrics.
+1. Use kubectl to handle auth & proxy the kubernetes API locally, emulating the old KUBERNETES_RO service.
 
 1. The list of services to be monitored is passed as a command line aguments in
 the yaml file.
@@ -74,5 +74,7 @@ at port 9090.
 - We should publish this image into the kube/ namespace.
 - Possibly use postgre or mysql as a promdash database.
 - push gateway (https://github.com/prometheus/pushgateway) setup.
+- stop using kubectl to make a local proxy faking the old RO port and build in
+  real auth capabilities.
 
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contrib/prometheus/prometheus-all.json

@@ -54,12 +54,29 @@
                                 "protocol": "TCP"
                             }
                         ],
+                        "env": [
+                            {
+                                "name": "KUBERNETES_RO_SERVICE_HOST",
+                                "value": "localhost"
+                            },
+                            {
+                                "name": "KUBERNETES_RO_SERVICE_PORT",
+                                "value": "8001"
+                            }
+                        ],
                         "volumeMounts": [
                             {
                                 "mountPath": "/var/prometheus/",
                                 "name": "data"
                             }
                         ]
+                    },
+                    {
+                        "name": "kubectl",
+                        "image": "gcr.io/google_containers/kubectl:v0.18.0-120-gaeb4ac55ad12b1-dirty",
+                        "args": [
+                            "proxy", "-p", "8001"
+                        ]
                     }
                 ],
                 "volumes": [