nodelocaldns: allow binding metrics address to host IP (#7748)

roles/kubernetes-apps/ansible/templates/nodelocaldns-daemonset.yml.j2

@@ -41,6 +41,13 @@ spec:
         args: [ "-localip", "{{ nodelocaldns_ip }}", "-conf", "/etc/coredns/Corefile", "-upstreamsvc", "coredns" ]
         securityContext:
           privileged: true
+{% if nodelocaldns_bind_metrics_host_ip %}
+        env:
+          - name: MY_HOST_IP
+            valueFrom:
+              fieldRef:
+                fieldPath: status.hostIP
+{% endif %}
         ports:
         - containerPort: 53
           name: dns