High Available Mosquitto MQTT on Kubernetes

Published: 14-05-2025 22:11 | Author: Remy van Elst | Text only version of this article In this post, we'll walk through a fully declarative, Kubernetes-native setup for running a highly available MQTT broker using Eclipse Mosquitto. This configuration leverages core Kubernetes primitives ( Deployments , Services , ConfigMaps , and RBAC ), alongside Traefik IngressRouteTCP to expose MQTT traffic externally. It introduces a lightweight, self-healing failover mechanism that automatically reroutes traffic to a secondary broker if the primary becomes unhealthy. The setup also demonstrates internal MQTT bridging, allowing seamless message propagation between brokers. The big advantage over a single Pod deployment (which, in case of node failure, k8s will restart after 5 minutes) is that this setup has a downtime of only 5 seconds and shared state, so all messages will be available on a failover. Recently I removed all Google Ads from this site due to their invasive tracking, as well as Go ... Read full article.