Enable load balancer and test with MQTT CLI

Enable load balancer

1. Open values.yaml and search for port 1883 under hivemq.ports.port

   ports:
       - name: "mqtt"
         port: 1883
         expose: true
         patch:
           - '[{"op":"add","path":"/spec/selector/hivemq.com~1node-offline","value":"false"},{"op":"add","path":"/metadata/annotations","value":{"service.spec.externalTrafficPolicy":"Local"}}]'
           # If you want Kubernetes to expose the MQTT port to external traffic
           # - '[{"op":"add","path":"/spec/type","value":"LoadBalancer"}]'

2. Uncomment and expose the loadbalancer

   ports:
       - name: "mqtt"
         port: 1883
         expose: true
         patch:
           - '[{"op":"add","path":"/spec/selector/hivemq.com~1node-offline","value":"false"},{"op":"add","path":"/metadata/annotations","value":{"service.spec.externalTrafficPolicy":"Local"}}]'
           # If you want Kubernetes to expose the MQTT port to external traffic
           - '[{"op":"add","path":"/spec/type","value":"LoadBalancer"}]'

3. Save the file and apply the changes

   helm upgrade hivemq --install hivemq/hivemq-operator --values values.yaml

4. Check if the service for port 1883 has an external IP address now (in our case its hivemq-hivemq-mqtt)

   kubectl get services

Connect To Your HiveMQ Cluster

Once your HiveMQ cluster is up and running, you are ready to connect clients to the cluster with the MQTT-CLI.
To obtain the exposed ENDPOINT of the created load balancer on which clients connect to your cluster, enter:

kubectl get hivemq-clusters

Output similar to the following displays:

$ kubectl get hivemq-clusters
NAME     SIZE   IMAGE            VERSION     STATUS    ENDPOINT       MESSAGE
hivemq   3      hivemq/hivemq4   k8s-4.24.0   Running   20.52.209.35   Live updates completed successfully

To start up the MQTT-CLI in shell mode, enter:

mqtt sh

In shell-mode, connect a new MQTT client to your HiveMQ cluster on the previously acquired endpoint address:

con -h 20.52.209.35

You have now successfully connected a new MQTT client to a HiveMQ cluster hosted on Azure.
To learn more ways to interact with HiveMQ, see the MQTT-CLI documentation.