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Complete prerequisites first ([PRE-01](PRE-01) → [PRE-08](PRE-08) minimum) before running these tests. Go to prerequisites

Verify golden image import and PVC clone
Create and boot first VM from template (RHEL 9)

Masquerade uses OVN-K over eno2/br-ex — no bridge setup required

VM live migration (SNO: expected failure)

NOT POSSIBLE on SNO — live migration requires ≥2 nodes. Documented as an expected failure.

Create VM snapshots and perform restore

Test on local storage

Clone VM and use as template (Golden VM pattern)
Pod network (masquerade) and VM access via Service

Optimal for single-NIC — OVN-K over eno2/br-ex, no bridge setup required

VM directly reachable on LAN (OVN-K localnet) -- ⚠ HETZNER TOS VIOLATION

✗ NOT TESTABLE ON HETZNER -- TOS violation! OVN-K localnet works technically (verified 30.06.2026: ping successful), but any VM MAC that reaches eno2/the physical switch via this interface is detected and reported by Hetzner as an unauthorised MAC (server suspension threatened). Only the registered server MAC is permitted.

SR-IOV – high-performance networking (HW missing)

✗ NOT TESTABLE — SR-IOV requires a dedicated second NIC (Intel X710, Mellanox ConnectX). The sole NIC eno2 is consumed by OVN-K and cannot be used for SR-IOV VFs.

Test VLAN isolation — VMs in separate software bridges

Variant A uses pure software bridges br-net1/2/3 (port: []) — no VM MAC leaves eno2/the physical switch, no TOS risk. Variant B (on-premises, trunk port) is relevant only with your own switch.

Inter-VLAN routing via router VM (br-net1 ↔ br-net2)

purely internal software bridges br-net1/br-net2 (port: []) — no VM MAC leaves the node

VM with 3 Network Interfaces (Management + Data + Storage)
OVN-Kubernetes UserDefinedNetwork (Layer2 Overlay)

UserDefinedNetwork with Layer2 topology is a pure overlay (encapsulated Geneve tunnel within OVN-K) — explicitly NOT localnet, so no VM MAC leaves the node.

⚠️ DEDICATED NAMESPACE REQUIRED: see NOTE below.

Verify MetalLB Basic Functionality

2 Pools: internal-pool binds to br-net1 — external-pool binds to eno2, requires a 2nd public IP

Expose VM Services via MetalLB (SSH)

external-pool uses a provider-registered additional IP (e.g. Hetzner Additional IP); MetalLB speaker announces with the node's own MAC.

⚠️ SHARED RESOURCE: external-pool currently has only ONE IP — Clean up after this test (delete vm-ssh-lb) before starting TC-HCP-002

MetalLB BGP Mode with Router Peering

⚠️ NOT usable by default on the current SNO cluster: there is no customer-controlled router in the path for peering. Left for documentation purposes and future tests.

Multiple IP Pools and Namespace Isolation
MetalLB + Isolated Software Bridges: LB IPs per Bridge Interface

L2Advertisement explicitly binds to br-net1/br-net2 — ARP announcements stay node-internal.

Verify HyperShift Operator and MCE

Single-NIC OK — HyperShift pods use the OVN-K pod network.

⚠️ Check Pod/Node Capacity before starting TC-HCP-002 — see steps below.

Create Hosted Cluster with KubeVirt provider

⚠️ SNO EXAMPLE INSTALLATION: --control-plane-availability-policy SingleReplica is mandatory on a single-node cluster.

Scale NodePool and change VM flavour

⚠️ Be sure enough compute resources are available on the SNO node before starting this test.

Remove Hosted Cluster cleanly (destroy)

Controlled removal of hc-demo after creation (TC-HCP-002) and scaling (TC-HCP-003) are complete. Deliberately a separate test case so destroy is not run accidentally too early, and verification of cleanup completeness (namespace gone, VMs gone, pod capacity freed again) is tested as a standalone step — equally important in practice as creation, since leftover remnants directly block pod capacity for the next Hosted Cluster.

Prerequisites checklist

Confirm these before running steps:

1Remove Hosted Cluster
hcp destroy cluster kubevirt --name hc-demo --namespace clusters
Destroy often takes 5–15 minutes; occasionally longer if finalisers stick — keep waiting until the HostedCluster object disappears
2Observe until everything is truly gone
watch oc get hostedcluster -n clusters
→ object disappears completely from the list, then Ctrl+C
3Verify completeness — worker VMs, namespace
oc get vm -n clusters-hc-demo
oc get ns clusters-hc-demo
→ both 'NotFound' = cleanly removed
4Check MetalLB pool state — pool itself remains, directly reusable for the next Hosted Cluster
oc get ipaddresspool external-pool -n metallb-system
oc get svc -A | grep <external-pool-ip> # or: oc get ipaddresspool external-pool -n metallb-system -o yaml
→ no matches = IP free again
5If it hangs (finaliser issue, occurs occasionally when a worker VM sticks during deletion)
oc get hostedcluster hc-demo -n clusters -o jsonpath='{.metadata.finalizers}'
oc patch hostedcluster hc-demo -n clusters --type=merge -p '{"metadata":{"finalizers":[]}}'
6If multiple Hosted Cluster remnants are suspected in general (e.g. from earlier failed attempts before the SingleReplica fix)
oc get hostedcluster -A
oc get ns | grep clusters-
→ remove each no-longer-needed entry likewise with 'hcp destroy cluster kubevirt --name <name> --namespace <namespace>'
DataVolume import from multiple sources

Import over OVN-K — bandwidth is shared with OCP traffic on eno2/br-ex in this cluster

Create VM backup with OADP
Restore VM from OADP backup

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