ray: [KubeRay][Dashboard] Port-forwarding dashboard fails.

What happened + What you expected to happen

Port-forwarding the Ray dashboard fails with KubeRay in at least some Kubernetes setups. I’ve observed the problem on GKE but not on a local KinD cluster.

Start a KubeRay Ray Cluster and attempt to port-forward the Ray head’s dashboard port kubectl -n ray port-forward service/example-cluster-ray-head 8265:8265

Forwarding from 127.0.0.1:8265 -> 8265
Forwarding from [::1]:8265 -> 8265
Handling connection for 8265
E0317 22:21:58.501309  135973 portforward.go:406] an error occurred forwarding 8265 -> 8265: error forwarding port 8265 to pod 755dce9c462676627f07602de97f7bf9c52ab727336cda0d7d02f0b566c5d292, uid : failed to execute portforward in network namespace "/var/run/netns/cni-76ec8b4c-cc4c-49cb-aa89-f87ec7f5f9e4": failed to dial 8265: dial tcp4 127.0.0.1:8265: connect: connection refused
E0317 22:21:58.501671  135973 portforward.go:234] lost connection to pod

Context: https://discuss.ray.io/t/ray-job-submit-errors-on-kubernetes/5449/4

Versions / Dependencies

Ray master, KubeRay master, GKE and potentially other cloud providers.

Reproduction script

Start a KubeRay Ray Cluster and attempt to port-forward the Ray head’s dashboard port kubectl -n ray port-forward service/example-cluster-ray-head 8265:8265

Issue Severity

High: It blocks me from completing my task.