I documented my journey setting up a Raspberry Pi Cluster with Longhorn for simplified cloud-native persistent block storage. The process took 30 minutes and assumed a functional Raspberry Pi Cluster. I prepared the environment by installing Helm, Calico CLI, and optionally, Kubernetes Dashboard. Then, I detailed the installation of Longhorn with Helm, including verification steps. Accessing Longhorn involved port-forwarding to the frontend service. The result: a highly available persistent storage solution for my Raspberry Pi Cluster, as depicted in the Longhorn dashboard. I addressed troubleshooting issues related to Calico and Longhorn uninstallation, ensuring a smooth experience.