[Feature] Allow setting app.kubernetes.io/name in head-svc created by RayService

[varunsridhar1]

Search before asking

• I had searched in the issues and found no similar feature requirement.

Description

Currently, when RayService creates the head-svc, it automatically assigns the app.kubernetes.io/name label to kuberay. It would be helpful to allow setting that label to a custom value.

Use case

We would like to set the name to our app name, which we use to scrape and filter logs in Loki and other places.

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

[win5923]

You can set custom labels via the headGroupSpec.template.metadata.labels, like:

headGroupSpec:
      rayStartParams:
        dashboard-host: '0.0.0.0'
      template:
        metadata:
          labels:
            app.kubernetes.io/name: test
        spec:
          containers:
            - name: ray-head
              image: rayproject/ray:2.9.0

$ kubectl get service rayservice-sample-raycluster-zhst9-head-svc -o jsonpath="{.spec.selector.app\.kubernetes\.io/name}"
test

[varunsridhar1]

@win5923 That worked for me on the Ray cluster head svc, but I would like to set a custom label on the head-svc created by RayService itself (rayservice-sample-head-svc in https://docs.ray.io/en/latest/cluster/kubernetes/user-guides/rayservice.html#step-4-verify-the-kubernetes-cluster-status). It seems like this service always has app.kubernetes.io/name set to kuberay.