After setting up my MQTT Broker in Kubernetes on GKE, I needed to connect my Home Assistant to it, as well as my Xiaomi DaFang/XiaoFang custom-firmware-enabled IP cameras.
This is a companion discussion topic for the original entry at https://www.funkypenguin.co.nz/note/mqtt-broker-letsencrypt-homeassistant-or-dafang-cfw/