Flaky Test: Pod groups when Single CQ should allow to preempt the lower priority group

[tenzen-y]

What happened:
The below E2E test failed.

End To End Suite: kindest/node:v1.30.0: [It] Pod groups when Single CQ should allow to preempt the lower priority group

{Timed out after 45.001s.
The function passed to Eventually failed at /home/prow/go/src/kubernetes-sigs/kueue/test/e2e/singlecluster/pod_test.go:483 with:
Expected
    <v1.PodPhase>: Succeeded
to equal
    <v1.PodPhase>: Failed failed [FAILED] Timed out after 45.001s.
The function passed to Eventually failed at /home/prow/go/src/kubernetes-sigs/kueue/test/e2e/singlecluster/pod_test.go:483 with:
Expected
    <v1.PodPhase>: Succeeded
to equal
    <v1.PodPhase>: Failed
In [It] at: /home/prow/go/src/kubernetes-sigs/kueue/test/e2e/singlecluster/pod_test.go:485 @ 02/27/25 01:48:44.842
}

What you expected to happen:
No errors.

How to reproduce it (as minimally and precisely as possible):
https://prow.k8s.io/view/gs/kubernetes-ci-logs/logs/periodic-kueue-test-e2e-release-0-10-1-30/1894925220897099776

Anything else we need to know?:

Environment:

• Kubernetes version (use kubectl version):
• Kueue version (use git describe --tags --dirty --always):
• Cloud provider or hardware configuration:
• OS (e.g: cat /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

[tenzen-y]

/kind flake

[mimowo]

/assign @mszadkow
I believe this is after the recent changes, as we use BehaviorExitFast. The Pod succeeds if it has enough time to complete, it fails if the Delete request is faster. I think we should use WaitForDeletion, and just let the pod to be deleted and failed. We may just need to use Pod's spec.terminationgraceperiodseconds=1 to make it fast. Alternatively trigger /exit 1 instead of exit 1 to let it fail. - this will not work becuase the Pod is deleted due to preemption.

[mszadkow]

Got it, will try with suggested solution.