Add dnsmasq-metrics to the standard DNS pod

- Enables prometheus metrics on kube-dns
- Explicitly set v=0 logging for now

cluster/juju/layers/kubernetes/templates/kubedns-rc.yaml

@@ -72,8 +72,12 @@ spec:
         # command = "/kube-dns"
         - --domain={{ pillar['dns_domain'] }}.
         - --dns-port=10053
+        - --v=0
         - --kube_master_url=http://{{ private_address }}:8080
         {{ pillar['federations_domain_map'] }}
+        env:
+          - name: PROMETHEUS_PORT
+            value: "10055"
         ports:
         - containerPort: 10053
           name: dns-local
@@ -81,6 +85,9 @@ spec:
         - containerPort: 10053
           name: dns-tcp-local
           protocol: TCP
+        - containerPort: 10055
+          name: metrics
+          protocol: TCP
       - name: dnsmasq
         image: gcr.io/google_containers/kube-dnsmasq-{{ arch }}:1.4
         livenessProbe:
@@ -104,6 +111,27 @@ spec:
         - containerPort: 53
           name: dns-tcp
           protocol: TCP
+      - name: dnsmasq-metrics
+        image: gcr.io/google_containers/dnsmasq-metrics-amd64:1.0
+        livenessProbe:
+          httpGet:
+            path: /metrics
+            port: 10054
+            scheme: HTTP
+          initialDelaySeconds: 60
+          timeoutSeconds: 5
+          successThreshold: 1
+          failureThreshold: 5
+        args:
+        - --v=2
+        - --logtostderr
+        ports:
+        - containerPort: 10054
+          name: metrics
+          protocol: TCP
+        resources:
+          requests:
+            memory: 10Mi
       - name: healthz
         image: gcr.io/google_containers/exechealthz-{{ arch }}:1.2
         resources: