[4.13] Egress IP Health Check Is Not Compatible With VF (Hardware Backed) Management Port

For Hardware Backed Management Ports (e.g. Virtual functions), the Egress IP Health Check Feature will error out with:
"unable to start health checking server: no mgmt ip"

OVN-Kubernetes 4.12.0

Always

1. Load OVN-Kubernetes 4.12.0 in MLX BlueField 2
2. If in NIC mode:
https://github.com/ovn-org/ovn-kubernetes/pull/3160
https://github.com/ovn-org/ovn-kubernetes/pull/3251
Patches are needed.
3. If in DPU mode then those above patches are optional.
4. Set OVNKUBE_NODE_MGMT_PORT_NETDEV environment variable to point to the Virtual Function.

Error in ovnkube-node:
"unable to start health checking server: no mgmt ip".
The ovnkube-node container will crash. Egress IP Health Check should be compatible with VFs as management port.

No Error.

A simple workaround is to not return an error:
go-controller/pkg/node/node.go
@@ -660,7 +660,8 @@ func (n *OvnNode) startEgressIPHealthCheckingServer(wg *sync.WaitGroup, mgmtPort
                        return fmt.Errorf("failed start health checking server due to unsettled IPv6: %w", err)
                }
        } else {
-               return fmt.Errorf("unable to start health checking server: no mgmt ip")
+               klog.Infof("Unable to start Egress IP health checking server: no mgmt ip")
+               return nil
        }