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[RayCluster] Terminate idle cluster #4400

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[RayCluster] Terminate idle cluster #4400

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@win5923 win5923 commented Jan 15, 2026 •
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Why are these changes needed?

Add TTL-based idle cluster termination

  • Add ttlSecondsAfterIdle field to RayCluster spec to automatically delete clusters that have been idle for a specified duration
  • Idle status is determined by querying the Ray Dashboard /api/component_activities endpoint
  • Skip idle check for RayClusters created by RayJob or RayService to avoid lifecycle management conflicts

Usage

apiVersion: ray.io/v1
kind: RayCluster
metadata:
  name: raycluster-kuberay
spec:
  ttlSecondsAfterIdle: 10
...

Related issue number

Closes #2998

Checks

  • I've made sure the tests are passing.
  • Testing Strategy
    • Unit tests
    • Manual tests
    • This PR is not tested :(

@win5923
[RayCluster] Terminate idle cluster
250d42d 
Signed-off-by: win5923 <ken89@kimo.com>
@win5923
Merge branch 'master' into terminate-idle-cluster
569e91d 
Signed-off-by: Jun-Hao Wan <ken89@kimo.com>
@win5923 win5923 force-pushed the terminate-idle-cluster branch from 660e2b1 to 569e91d Compare January 15, 2026 17:07
@win5923
make generate
058fe8c 
Signed-off-by: win5923 <ken89@kimo.com>
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@MortalHappiness MortalHappiness Awaiting requested review from MortalHappiness MortalHappiness will be requested when the pull request is marked ready for review MortalHappiness is a code owner

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[Feature] Terminate idle cluster

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