test: increase pod creation timeout in migration test to fix flake

[janetkuo]

What this PR does / why we need it:

This PR increases the polling timeout for initial Pod creation in dev/tools/test-migration.py from 20 seconds to 60 seconds to resolve flaky E2E migration test failures in Prow CI.

In Prow CI environments, 20 seconds is frequently too aggressive for a freshly started v0.4.6 controller manager to complete informer cache synchronization, observe the newly seeded Sandbox CR, execute the reconciler, and have the apiserver create the underlying Pod.

Which issue(s) this PR is related to:

Fixes #1011

Release Note

NONE

Summary by CodeRabbit

• Tests
  • Improved migration/upgrade test stability by extending the wait period for the upgrade sandbox Pod.
  • Updated polling behavior to reduce load (longer sleep) and added periodic progress logging.
  • If the Pod still doesn’t appear, the test now outputs extra diagnostics before proceeding to readiness checks.

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[kubernetes-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: janetkuo

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Configuration used: Path: .coderabbit.yaml

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📥 Commits

Reviewing files that changed from the base of the PR and between 4d0c8e5 and ad60141.

📒 Files selected for processing (1)

• dev/tools/test-migration.py

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📝 Walkthrough

Walkthrough

In dev/tools/test-migration.py, the polling loop inside create_v1alpha1_objects that waits for the upgrade-sandbox-running Pod to appear is extended from 20 to 60 iterations with increased sleep duration, periodic progress logging every 5 attempts, and diagnostic kubectl output on timeout.

Changes

Pod polling reliability improvement

Layer / File(s)	Summary
Extend Pod polling timeout with diagnostics and logging dev/tools/test-migration.py	The polling loop checking for the upgrade-sandbox-running Pod is increased from 20 to 60 iterations with 2-second delays (instead of 1-second), progress logging is added every 5 attempts, and on timeout the test prints diagnostic information (kubectl get/describe and controller logs) to stderr before the readiness assertion fails.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

A bunny tends the garden test,
The Pod was slow, but doing its best.
We doubled the waits and added some clues,
When silence falls, we debug the news.
🐇 Patience and logs make tests more kind! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: increasing a pod creation timeout in the migration test to fix flakiness.
Description check	✅ Passed	The description covers all required sections from the template with clear explanations of why the change is needed and links to the related issue.
Linked Issues check	✅ Passed	The PR directly addresses issue #1011 by increasing the polling timeout from 20 to 60 seconds, which resolves the Pod creation timeout assertion failure in Prow CI environments.
Out of Scope Changes check	✅ Passed	All changes are scoped to fixing the flaky timeout issue in the migration test; no unrelated modifications are present in the changeset.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[Copilot]

Pull request overview

This PR reduces flakiness in the Prow migration/upgrade test by increasing the polling timeout for the initial upgrade-sandbox-running Pod creation in dev/tools/test-migration.py, accommodating slower controller startup/informer sync in CI.

Changes:

• Increase the Pod existence polling loop from 20 seconds to 60 seconds before failing the migration test.

[coderabbitai]

🧹 Nitpick comments (1)

dev/tools/test-migration.py (1)

308-308: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Consider renaming unused loop variable to _i.

The loop variable i is not used within the loop body. By convention, prefix it with an underscore to signal that it's intentionally unused.

♻️ Proposed fix

-    for i in range(60):
+    for _i in range(60):

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@dev/tools/test-migration.py` at line 308, The loop variable `i` in the for
loop is not used within the loop body. Rename the loop variable from `i` to `_i`
to follow Python convention and signal that this variable is intentionally
unused. This improves code readability and makes the intent clear to other
developers.

Source: Linters/SAST tools

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@dev/tools/test-migration.py`:
- Line 308: The loop variable `i` in the for loop is not used within the loop
body. Rename the loop variable from `i` to `_i` to follow Python convention and
signal that this variable is intentionally unused. This improves code
readability and makes the intent clear to other developers.

---

ℹ️ Review info

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Configuration used: Path: .coderabbit.yaml

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📥 Commits

Reviewing files that changed from the base of the PR and between 2207443 and 4d0c8e5.

📒 Files selected for processing (1)

• dev/tools/test-migration.py

[shrutiyam-glitch]

/lgtm

[zzz6519003]

it's like a magic number