Since the last release of LoRa Server it possible to integrate with Azure to communicate with LoRa gateways (using the LoRa Gateway Bridge). Instead of hosting your own MQTT broker, you can make use of the Azure IoT Hub and Azure Service Bus to communicate with LoRa gateways which can help in scalability and maintainability.
A complete tutorial (including using the hosted Redis and hosted PostgreSQL instances) can be found here: https://www.loraserver.io/guides/microsoft-azure/. If you see any ways to improve this tutorial, please share your feedback or create a pull-request (documentation repository: https://github.com/brocaar/docs.loraserver.io).