01 · Overview & management plane
Harvester HCI — VM, Longhorn & External Rook/Ceph Storage
02 · Cluster layout
Level 0 Harvester bare metal hosting two separate Level-1 RKE2 clusters as VMs
03 · Network fabric
Pod and storage traffic physically separated across seven networks
04 · Storage data paths
Longhorn for local root disks, external Rook/Ceph for durable data
05 · North-south ingress
MetalLB + Gateway API — external traffic into the application RKE2 cluster
06 · Physical network topology
Per-host cabling — 4 × 25G data ports + 1 × 1G BMC, identical on all 18 hosts