$ kubectl apply -f https://raw.githubusercontent.com/cilium/cilium/v1.7/examples/kubernetes/connectivity-check/connectivity-check.yaml
...
$ kubectl get po | grep hostpo
pod-to-b-intra-node-hostport-6549fc5b88-lmjdv           0/1     Running   5          5m22s
pod-to-b-multi-node-hostport-795964f8c8-8k5nb           0/1     Running   3          5m20s

$ k describe pod/pod-to-b-multi-node-hostport-795964f8c8-8k5nb | tail -n 1
k  Warning  Unhealthy  48s (x24 over 4m38s)   kubelet, gke-joe-k-e-default-pool-14835e70-qhs1  Readiness probe failed: curl: (7) Failed to connect to echo-b-host-headless port 40000: Connection refused

$ kubectl get pods -o yaml | grep hostPo
        hostPort: 40000