h-a/mosquitto: Configure Service externalIPs

Clients outside the cluster can now communicate with Mosquitto directly
on port 8883 by using its dedicated external IP address.  This address
is automatically assigned to the node where Mosquitto is running by
`keepalived`.

home-assistant/mosquitto.yaml

@@ -26,11 +26,12 @@ spec:
   ports:
   - port: 8883
     name: mqtt
-    nodePort: 30783
   selector:
     app.kubernetes.io/component: mosquitto
     app.kubernetes.io/name: mosquitto
-  type: NodePort
+  type: ClusterIP
+  externalIPs:
+  - 172.30.0.148
 
 ---
 apiVersion: apps/v1