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Prerequisites & cluster preparation(15 of 15)

Keep this order!
⚠️ Cluster introduction

The following tests have been executed on a Single Node OpenShift (SNO) cluster.

The cluster is using: Minio Object Storage, MetalLB, LVM (local disks must be available), and a single NIC (a 2nd IP address is used for the VM network tests).

Some test cases could not be fully executed due to limitation of the SNO cluster or the hardware. They are still documented for reference and marked accordingly.

On the first test server, only one physical NIC (eno2) is available and is fully attached to the OVS bridge br-ex by OVN-Kubernetes. All current tests therefore use variant A (software bridges). Variant C (Hetzner vSwitch) and variant B (on-premises trunk) are documented for future expansion.

1✅ Current decision: variant A — software bridges (br-net1, br-net2, br-net3)
2Reason: Hetzner SNO node has only one NIC (eno2), fully controlled by OVN-K / br-ex
3Reason: Hetzner vSwitch (VLAN 4000) tested — works technically, but requires a second server in the vSwitch
4Reason: on-premise trunk port (variant B) not possible — no switch access at Hetzner
5Variant A provides full VM network isolation on the node internally — sufficient for all planned tests
6Keep NIC names from PRE-01 handy: eno2 (altname enp7s0) — required for PRE-04