https://raymii.org/s/tags/ha.xml RSS feed for tag ha on Raymii.org https://raymii.org/s/tutorials/High_Available_Mosquitto_MQTT_Broker_on_Kubernetes.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/High_Available_Mosquitto_MQTT_Broker_on_Kubernetes.html 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. Wed, 14 May 2025 22:11:00 GMT Wed, 14 May 2025 22:11:00 GMT https://raymii.org/s/articles/Building_HA_Clusters_With_Ansible_and_Openstack.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/articles/Building_HA_Clusters_With_Ansible_and_Openstack.html This is an extensive guide on building high available clusters with Ansible and Openstack. We'll build a Highly available cluster consisting out of two load balancers, two database servers and two application servers running a simple wordpress site. This is all done with Ansible, the cluster nodes are all on Openstack. Ansible is a super awesome orchestration tool and Openstack is a big buzzword filled software suite for datacenter virtualization. Fri, 25 Jul 2014 00:00:00 GMT Fri, 25 Jul 2014 00:00:00 GMT