This document describes how to configure your Google Kubernetes Engine deploymentso that you can use Google Cloud Managed Service for Prometheus to collect metrics fromKubeRay. This document shows you how to do the following:

• Set up KubeRay to report metrics.
• Access a predefined dashboard in Cloud Monitoring to view the metrics.

These instructions apply only if you are usingmanaged collectionwith Managed Service for Prometheus.If you are using self-deployed collection, then see theKubeRay documentationfor installation information.

These instructions are provided as an example and are expected to work inmost Kubernetes environments.If you are having trouble installing anapplication or exporter due to restrictive security or organizational policies,then we recommend you consult open-source documentation for support.

For information about KubeRay, seeKubeRay.For information about setting up KubeRay on Google Kubernetes Engine,see the GKE guide for KubeRay.

Prerequisites

To collect metrics fromthe KubeRay exporterby usingManaged Service for Prometheus and managed collection, your deployment mustmeet the following requirements:

• Your cluster must be running Google Kubernetes Engine version 1.28.15-gke.2475000 or later.
• You must be running Managed Service for Prometheus with managed collection enabled. For more information, see Get started with managed collection.

1. Set up port forwarding by using the following command:

   kubectl -nNAMESPACE_NAME port-forwardPOD_NAME 8080:8080

2. Access the endpointlocalhost:8080/metrics by using the browseror thecurl utility in another terminal session.

Define a PodMonitoring resource

For target discovery, the Managed Service for Prometheus Operatorrequires a PodMonitoring resource that corresponds tothe KubeRay exporter in the same namespace.

You can use the following PodMonitoring configuration:

# Copyright 2025 Google LLC## Licensed under the Apache License, Version 2.0 (the "License");# you may not use this file except in compliance with the License.# You may obtain a copy of the License at##     https://www.apache.org/licenses/LICENSE-2.0## Unless required by applicable law or agreed to in writing, software# distributed under the License is distributed on an "AS IS" BASIS,# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.# See the License for the specific language governing permissions and# limitations under the License.apiVersion:monitoring.googleapis.com/v1kind:PodMonitoringmetadata:name:raylabels:app.kubernetes.io/name:rayapp.kubernetes.io/part-of:google-cloud-managed-prometheusspec:endpoints:-port:8080scheme:httpinterval:30spath:/metricsselector:matchLabels:ray.io/is-ray-node:"yes"

To apply configuration changes from a local file, run the following command:

kubectl apply -nNAMESPACE_NAME -fFILE_NAME

You can alsouse Terraformto manage your configurations.

Verify the configuration

You can use Metrics Explorer to verify that you correctly configuredthe KubeRay exporter. It might take one or two minutes forCloud Monitoring to ingest your metrics.

To verify the metrics are ingested, do the following:

1. In the Google Cloud console, go to theleaderboard Metrics explorer page:

   Go toMetrics explorer

   If you use the search bar to find this page, then select the result whose subheading isMonitoring.

2. In the toolbar of thequery-builder pane, select the button whose name is eithercode MQL orcode PromQL.
3. Verify thatPromQL is selectedin theLanguage toggle. The language toggle is in the same toolbar thatlets you format your query.
4. Enter and run the following query:
   

   up{job="ray", cluster="CLUSTER_NAME", namespace="NAMESPACE_NAME"}

View dashboards

The Cloud Monitoring integration includestheRay on GKE Overview dashboard.Dashboards are automatically installed when you configure the integration.You can also view static previews of dashboards without installing theintegration.

To view an installed dashboard, do the following:

1. In the Google Cloud console, go to thedashboard Dashboards page:

   Go toDashboards

   If you use the search bar to find this page, then select the result whose subheading isMonitoring.

2. Select theDashboard List tab.
3. Choose theIntegrations category.
4. Click the name of the dashboard, for example,Ray on GKE Overview.

To view a static preview of the dashboard, do the following:

1. In the Google Cloud console, go to the Integrations page:

   Go toIntegrations

   If you use the search bar to find this page, then select the result whose subheading isMonitoring.

2. Click theKubernetes Engine deployment-platform filter.
3. Locate the KubeRay integration and clickView Details.
4. Select theDashboards tab.

Troubleshooting

For information about troubleshooting metric ingestion problems, seeProblems with collection from exporters inTroubleshooting ingestion-side problems.