Monitor CoreDNS over svc

roles/kubernetes-apps/ansible/templates/coredns-svc.yml.j2

@@ -9,6 +9,10 @@ metadata:
     kubernetes.io/cluster-service: "true"
     addonmanager.kubernetes.io/mode: Reconcile
     kubernetes.io/name: "CoreDNS"
+  annotations:
+    prometheus.io/path: /metrics
+    prometheus.io/port: "9153"
+    prometheus.io/scrape: "true"
 spec:
   selector:
     k8s-app: coredns{{ coredns_ordinal_suffix | default('') }}
@@ -20,3 +24,6 @@ spec:
     - name: dns-tcp
       port: 53
       protocol: TCP
+    - name: metrics
+      port: 9153
+      protocol: TCP