[stable/coredns fix prometheus metrics (#1748)

stable/coredns/Chart.yaml

@@ -1,5 +1,5 @@
 name: coredns
-version: 0.3.0
+version: 0.4.0
 description: CoreDNS is a DNS server that chains middleware and provides Kubernetes DNS Services
 keywords:
 - coredns

stable/coredns/templates/configmap.yaml

@@ -31,7 +31,7 @@ data:
         health
       {{- end }}
       {{- if eq "prometheus" $key }}
-        prometheus localhost:{{ $middleware.port }}
+        prometheus 0.0.0.0:{{ $middleware.port }}
       {{- end }}
       {{- if eq "proxy" $key }}
         proxy . /etc/resolv.conf

stable/coredns/templates/deployment.yaml

@@ -61,6 +61,11 @@ spec:
           name: dns-tcp
           protocol: TCP
         {{- end }}
+        {{- if .Values.middleware.prometheus.enabled }}
+        - containerPort: {{ .Values.middleware.prometheus.port }}
+          name: metrics
+          protocol: TCP
+        {{- end }}
         livenessProbe:
           httpGet:
             path: /health

stable/coredns/templates/service.yaml

@@ -39,4 +39,9 @@ spec:
     port: 53
     protocol: TCP
   {{- end }}
+  {{- if .Values.middleware.prometheus.enabled }}
+  - name: metrics
+    port: {{ .Values.middleware.prometheus.port }}
+    protocol: TCP
+  {{- end }}
   type: {{ default "ClusterIP" .Values.serviceType }}