rabbitmq: Configure Service externalIPs

Clients outside the cluster can now communicate with RabbitMQ directly
on port 5671 by using its dedicated external IP address.  This address
is automatically assigned to the node where RabbitMQ is running by
`keepalived`.

rabbitmq/rabbitmq.yaml

@@ -13,6 +13,9 @@ spec:
     app.kubernetes.io/name: rabbitmq
     app.kubernetes.io/component: rabbitmq
   type: ClusterIP
+  externalIPs:
+  - 172.30.0.149
+  externalTrafficPolicy: Local
 
 ---
 apiVersion: apps/v1