addons: Update Prometheus from v2.1.0 to v2.2.0

* Annotate Prometheus service to scrape metrics from
Prometheus itself (enables Prometheus* alerts)
* Update kube-state-metrics addon-resizer to 1.7
* Use port 8080 for kube-state-metrics
* Add PrometheusNotIngestingSamples alert rule
* Change K8SKubeletDown alert rule to fire when 10%
of kubelets are down, not 1%
  * https://github.com/coreos/prometheus-operator/pull/1032

addons/prometheus/exporters/kube-state-metrics/deployment.yaml

@@ -33,7 +33,7 @@ spec:
           initialDelaySeconds: 5
           timeoutSeconds: 5
       - name: addon-resizer
-        image: gcr.io/google_containers/addon-resizer:1.0
+        image: gcr.io/google_containers/addon-resizer:1.7
         resources:
           limits:
             cpu: 100m
@@ -54,8 +54,8 @@ spec:
           - /pod_nanny
           - --container=kube-state-metrics
           - --cpu=100m
-          - --extra-cpu=2m
-          - --memory=150Mi
-          - --extra-memory=30Mi
+          - --extra-cpu=1m
+          - --memory=100Mi
+          - --extra-memory=2Mi
           - --threshold=5
           - --deployment=kube-state-metrics

addons/prometheus/exporters/kube-state-metrics/service.yaml

@@ -15,5 +15,5 @@ spec:
   ports:
     - name: metrics
       protocol: TCP
-      port: 80
+      port: 8080
       targetPort: 8080