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Improve E2E tests for the gang-scheduling #1801

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merged 1 commit into from
May 11, 2023

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tenzen-y
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@tenzen-y tenzen-y commented May 7, 2023

What this PR does / why we need it:
In E2E, after we created Jobs with unschedulable configurations, we verify the number of conditions is 1 when using scheduler plugins for gang scheduling.

But, the test seems flaky, as reported in #1779.

So, I modified the test to verify whether unschedulable Jobs have a Created condition and don't have a Running condition instead of the current way.

Which issue(s) this PR fixes (optional, in Fixes #<issue number>, #<issue number>, ... format, will close the issue(s) when PR gets merged):
Fixes #1779

Checklist:

  • Docs included if any changes are user facing

Signed-off-by: Yuki Iwai <yuki.iwai.tz@gmail.com>
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Pull Request Test Coverage Report for Build 4907867447

  • 0 of 0 changed or added relevant lines in 0 files are covered.
  • 2 unchanged lines in 1 file lost coverage.
  • Overall coverage increased (+0.03%) to 39.482%

Files with Coverage Reduction New Missed Lines %
pkg/controller.v1/mpi/mpijob_controller.go 2 77.16%
Totals Coverage Status
Change from base Build 4659763896: 0.03%
Covered Lines: 2742
Relevant Lines: 6945

💛 - Coveralls

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tenzen-y commented May 7, 2023

/assign @johnugeorge @nagar-ajay

if not client.is_job_created(name, namespace, job_kind):
raise Exception(f"{job_kind} should be in Created condition")

# Job shouldn't have a Running condition.
if client.is_job_running(name, namespace, job_kind):
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Will this be flaky? What if job gets into running state?

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In that case, the test should be failed since we pass an unschedulable job to def verify_unschedulable_job_e2e.

unschedulable_tfjob = generate_tfjob(worker, V1SchedulingPolicy(min_available=10), job_namespace)

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@nagar-ajay nagar-ajay May 11, 2023

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@tenzen-y Sorry for the late response.
I agree with the behavior, that if we're passing an unschedulable job and it has a running state then our test should fail.
My doubt is, are we sure that the job we're passing is unschedulable? Because in my testing the job had two states (created and running). If the job is unschedulable then it shouldn't have running state, right?

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My doubt is, are we sure that the job we're passing is unschedulable?

@nagar-ajay Ah, I see.

In the previous test, we verify the number of Conditions. So, If the Job has Created=true and Running=false, this test unintentionally fails.

In this PR, the test would be passed in that case (Created=true and Running=false).

Does that make sense?

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yup, that makes sense.

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Let me summarize for @johnugeorge.

In the previous Implementation, tests go to fail if the Job has Created=false OR Has(Running).

In this implementation, tests go to fail only if Job has Created=false OR Running=true.

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Thanks for fixing the issue. The changes looks good to me.

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Thanks @tenzen-y for explaining
/lgtm
/approve

@google-oss-prow google-oss-prow bot added the lgtm label May 11, 2023
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: johnugeorge, tenzen-y

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

Approvers can indicate their approval by writing /approve in a comment
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Pull Request Test Coverage Report for Build 4907867447

  • 0 of 0 changed or added relevant lines in 0 files are covered.
  • 2 unchanged lines in 1 file lost coverage.
  • Overall coverage decreased (-0.04%) to 39.41%

Files with Coverage Reduction New Missed Lines %
pkg/controller.v1/mpi/mpijob_controller.go 2 77.16%
Totals Coverage Status
Change from base Build 4659763896: -0.04%
Covered Lines: 2737
Relevant Lines: 6945

💛 - Coveralls

@google-oss-prow google-oss-prow bot merged commit 485b1fb into kubeflow:master May 11, 2023
@tenzen-y tenzen-y deleted the improve-e2e-test branch May 11, 2023 10:33
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Flaky e2e tests
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