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e2e: node: memory manager: wait for pod pending deletion before do the actual test #128894

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e2e: node: memory manager: wait for pod pending deletion before do the actual test #128894

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ffromani
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What type of PR is this?

/kind bug
/kind flake

What this PR does / why we need it:

The metrics tests, memory manager first and foremost, expect a controlled environment on which they run.
This is why they are labeled Serial. The key factor here is the predictability: the test expect
to be in full control of the node state; if any other actor mutates the node state, that makes for a almost guaranteed
false negative.

To reduce the chance to flake, we add an extra check before to run the actual tests: detect pods pending deletion, and
wait for them to be gone.

Which issue(s) this PR fixes:

Fixes #128869

Special notes for your reviewer:

see slack thread: https://kubernetes.slack.com/archives/C0BP8PW9G/p1732023371237679

Does this PR introduce a user-facing change?

NONE

@ffromani
e2e: node: memory manager: wait for pod pending delete
8586d8f 
The metrics tests, memory manager first and foremost,
expect a controlled environment on which they run.
This is why they are labeled Serial.
The key factor here is the predictability: the test expect
to be in full control of the node state; if any other actor
mutates the node state, that makes for a almost guaranteed
false negative.

To reduce the chance to flake, we add an extra check before
to run the actual tests: detect pods pending deletion, and
wait for them to be gone.

Signed-off-by: Francesco Romani <fromani@redhat.com>
@k8s-ci-robot k8s-ci-robot added release-note-none Denotes a PR that doesn't merit a release note. size/S Denotes a PR that changes 10-29 lines, ignoring generated files. kind/bug Categorizes issue or PR as related to a bug. kind/flake Categorizes issue or PR as related to a flaky test. cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. do-not-merge/needs-sig Indicates an issue or PR lacks a `sig/foo` label and requires one. needs-triage Indicates an issue or PR lacks a `triage/foo` label and requires one. labels Nov 20, 2024
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This issue is currently awaiting triage.

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@k8s-ci-robot k8s-ci-robot added needs-priority Indicates a PR lacks a `priority/foo` label and requires one. area/test sig/node Categorizes an issue or PR as relevant to SIG Node. sig/testing Categorizes an issue or PR as relevant to SIG Testing. and removed do-not-merge/needs-sig Indicates an issue or PR lacks a `sig/foo` label and requires one. labels Nov 20, 2024
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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ffromani
Once this PR has been reviewed and has the lgtm label, please assign sjenning for approval. For more information see the Kubernetes Code Review Process.

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

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@ffromani
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/hold

if we like this direction, I want to update all the other metrics tests

@k8s-ci-robot k8s-ci-robot added the do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. label Nov 20, 2024
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@andrewsykim andrewsykim Awaiting requested review from andrewsykim

@Random-Liu Random-Liu Awaiting requested review from Random-Liu

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area/test cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. kind/bug Categorizes issue or PR as related to a bug. kind/flake Categorizes issue or PR as related to a flaky test. needs-priority Indicates a PR lacks a `priority/foo` label and requires one. needs-triage Indicates an issue or PR lacks a `triage/foo` label and requires one. release-note-none Denotes a PR that doesn't merit a release note. sig/node Categorizes an issue or PR as relevant to SIG Node. sig/testing Categorizes an issue or PR as relevant to SIG Testing. size/S Denotes a PR that changes 10-29 lines, ignoring generated files.
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