Platform foundation
Longhorn
Replicated block storage on the workers' NVMe disks
What it does
Longhorn turns local disks on each node into replicated block storage, giving pods a PersistentVolume that can fail over to another node instead of disappearing with it.
How it runs here
Runs in the longhorn-system namespace using the NVMe disks on two of the three worker nodes, and backs PersistentVolumeClaims across the cluster, from a two-replica 50Gi volume for Nexus down to a single-replica 2Gi volume for Grafana.
Connects to
Why I chose it
Replicated storage means a single worker node dying does not take a database or registry's data with it, which matters more without a SAN or cloud-managed disks.