Use Fedora image for common VM preference tests

[geetikakay]

What this PR does / why we need it:

The preference tests validate that KubeVirt applies CPU/memory/device preferences correctly. Fedora boots faster and
avoids teardown failures seen with 512Mi guest memory.

Which issue(s) this PR fixes:

tier3 tests continues to fail in teardown

Special notes for reviewer:

RHEL9 guest image cannot shutdown with
512Mi guest memory, which is the requirement defined by the
windows.2k8 and windows.2k12 preferences.With other windows with 2Gi guest memory RHEL9 image tests works fine and teardown happens. This causes VMIs to
remain in Running phase indefinitely after VM deletion, blocking
namespace cleanup and failing teardown with ResourceTeardownError.
so replacing with a lighter image, so that we get only legit failures due to preferences.

jira-ticket:

https://redhat.atlassian.net/browse/CNV-88839
t3 lane failures

Summary by CodeRabbit

• Tests
  • Updated test infrastructure to use an alternative VM image for test execution.

Note: This is a test-only change with no impact to end-user functionality.

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[coderabbitai]

📝 Walkthrough

Walkthrough

The test fixture for VM creation in cluster preference validation is updated to use the Fedora container image instead of the RHEL 9 registry guest image. The change affects only the image constant passed to the test VM initialization, with no modifications to test logic or assertions.

Changes

Test VM Configuration Update

Layer / File(s)	Summary
VM image fixture substitution tests/infrastructure/instance_types/test_common_vm_preference.py	VM image constant updated from Images.Rhel.RHEL9_REGISTRY_GUEST_IMG to Images.Fedora.FEDORA_CONTAINER_IMAGE in start_vm_with_cluster_preference test helper.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the main change: switching from RHEL9 to Fedora image in VM preference tests. It is concise (47 chars) and well within the 120-char limit.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Stp Link Required	✅ Passed	No new test files or test functions added in this PR—only a modification to an existing line in start_vm_with_cluster_preference function. Check does not apply.
Description check	✅ Passed	PR description covers all required template sections with substantive content addressing the change rationale, affected issue, and technical context.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

Warning

Review ran into problems

🔥 Problems

Linked repositories: Your configuration references 1 linked repositories, but your current plan allows 0. Analyzed ``, skipped RedHatQE/openshift-virtualization-tests-design-docs.

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[openshift-virtualization-qe-bot-6]

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[geetikakay]

/build-and-push-container

[openshift-virtualization-qe-bot-5]

New container for quay.io/openshift-cnv/openshift-virtualization-tests:pr-5152 published

[geetikakay]

/test-plan

[openshift-virtualization-qe-bot-3]

@coderabbitai

Test execution plan request details

CRITICAL: You MUST post an inline review comment on the first changed line of the first file.
The inline comment should contain the full Test Execution Plan (smoke decision, gating decision, and specific affected tests).
Do NOT submit a blocking review event (REQUEST_CHANGES/APPROVE).
Post a single inline PR comment on Files Changed (non-blocking COMMENT flow).

As an expert software testing engineer, analyze all modified files in this PR and create a targeted test execution plan.
You will post an inline review comment with the test execution plan on the first changed file.
If you fail to run or post a comment, retry.

Analysis Requirements:

1. Examine code changes in each modified file

2. Identify affected code paths, functions, and classes

3. Analyze pytest-specific elements: fixtures (scope, dependencies), parametrization, markers, conftest changes

4. Trace test dependencies through imports, shared utilities, fixture inheritance, fixture teardown, and yield from cleanup in conftest

5. Detect new tests introduced in the PR

6. Utilities and libs impact (when utilities/ or libs/ changes):
   You MUST use shell scripts (rg, git diff) to trace the full impact.
   Follow these sub-steps in order:

   6a. Identify modified symbols: For each changed file under utilities/ or libs/,
   list every modified function or method.
   Example: git diff HEAD~1 --unified=0 -- utilities/hco.py | grep '^[+-]def '

   6b. Find direct callers: Search tests and conftest for each symbol from 6a.
   Example: rg -l 'get_hco_version' tests/

   6c. Trace fixture teardown and cleanup: Find fixtures that reach
   the modified symbol through yield from or context-manager wrappers.
   Example: rg -l 'yield from.*enable_common_boot|def.*enable_common_boot' tests/

   6d. Trace same-file callers: In each changed file, find other functions
   whose body calls a modified symbol (including code after yield
   in @contextmanager helpers).
   Example: rg 'get_hco_version|enable_common_boot' utilities/hco.py

   6e. Expand transitively: If function A calls modified B, then
   tests/fixtures that call A are affected — even when the test body
   never imports B directly.

   Do NOT limit impact to tests that import the modified symbol only.

7. Smoke test impact: Intersect the affected set from step 6 with smoke-marked tests.
   Run: rg -l '@pytest.mark.smoke' tests/
   VERIFY the above command returned actual file paths before concluding False.
   Set True if either condition is met:

   • a smoke-marked file appears in the affected set from 6b-6e, OR
   • any conftest.py in the smoke test's parent-directory hierarchy (up to repo root)
     imports or calls a modified utilities/libs symbol — including autouse fixtures
     that depend on modified functions. ALL tests in that directory and below are affected.
     Example check: for each smoke_file, scan dirname(smoke_file)/conftest.py,
     dirname(dirname(smoke_file))/conftest.py, etc. for modified symbol imports
     and autouse fixtures that depend on modified symbols.

8. Gating test impact: Intersect the affected set from step 6 with gating-marked tests.
   Run: rg -l '@pytest.mark.gating' tests/
   Set True if a gating-marked file also appears in the affected set from 6b-6e.
   Utilities/libs changes often affect gating tests without affecting smoke tests.
   Do NOT stop analysis after concluding Run smoke tests: False.

Output rules:
Do NOT include analysis step numbers (1-8) in your visible output.

Your deliverable:
Your inline informational comment will be based on the following requirements:

Test Execution Plan

• Run smoke tests: True / False — If True, state the dependency path (test → fixture → changed symbol). True ONLY with a verified path.
• Run gating tests: True / False — If True, state the dependency path. True if any gating-marked test is in the affected set.
• Affected tests to run (required when utilities/, libs/, or shared conftest changes — list concrete paths even when smoke is False)

Use these formats:

• path/to/test_file.py - When the entire test file needs verification
• path/to/test_file.py::TestClass::test_method - When specific test(s) needed
• path/to/test_file.py::test_function - When specific test(s) needed
• -m marker - When a marker covers multiple affected tests (e.g. -m gating only if ALL gating tests in scope need run)
• Tag each listed test or group with its marker when not obvious, e.g. (gating) or (smoke)

Real test commands (MANDATORY when changes affect session/runtime code):

When the affected code runs at session/collection time (conftest fixtures, pytest plugins,
config hooks, session-scoped setup) or modifies runtime behavior that unit tests mock away,
you MUST include concrete pytest commands the PR author must run on a real cluster
to verify the change works end-to-end. Include:

• A command for the error/fix path (the scenario the PR fixes)
• A command for the happy path (regression: the normal case still works)
• Use lightweight tests (e.g., --collect-only for startup failures,
  a single small test for runtime behavior)
  If the PR only changes test logic (not utilities/libs/conftest), the affected test
  paths themselves serve as the real test commands — no separate section needed.

Example output for a session-startup fix:

**Real tests (cluster required)**
Error path (the fix):
`pytest tests/storage/.../test_foo.py --storage-class-matrix=nonexistent-sc --collect-only`
Expected: ValueError with clear message, not IndexError

Happy path (regression):
`pytest tests/storage/.../test_foo.py --storage-class-matrix=<valid-sc> -k test_bar`
Expected: session starts normally

Guidelines:

• Include tests affected directly OR via fixture setup/teardown, yield from cleanup, or transitive utility call chains (caller calls modified helper)
• Use a full file path only if ALL tests in that file require verification
• Use file path + test name when only specific tests use an affected fixture or utility wrapper (preferred for partial file impact)
• If a test marker can cover multiple files/tests, provide the marker
• Balance coverage vs over-testing - Keep descriptions minimal
• Example: if leaf helper foo() changes, include tests whose fixture teardown calls wrapper bar() where bar() calls foo(), even when the test body only imports an unrelated symbol from the same utilities module

Hardware-Related Checks (SR-IOV, GPU, DPDK):

When PR modifies fixtures for hardware-specific resources:

• Collection Safety: Fixtures MUST have existence checks (return None when hardware unavailable)
• Test Plan: MUST verify both WITH and WITHOUT hardware:
  • Run affected tests on cluster WITH hardware
  • Verify collection succeeds on cluster WITHOUT hardware

CRITICAL WORKFLOW COMPLETION RULES:

When responding to this test execution plan request, you MUST follow these rules EXACTLY:

1. YOUR ONLY DELIVERABLE: Post one non-blocking inline comment containing the test execution plan on the first changed line
2. THEN STOP IMMEDIATELY - Do NOT generate any additional response
3. FALLBACK ONLY: If inline comment API calls fail after retrying, post as a regular PR comment
4. SILENCE = SUCCESS: After successfully submitting the review, your task is complete. No confirmation needed.

ABSOLUTE PROHIBITIONS (violating these creates empty/meaningless reviews):

• ❌ Do NOT post acknowledgment messages like "Test execution plan posted", "Review posted successfully", "I've successfully posted"
• ❌ Do NOT mention review IDs, URLs, or confirmation of posting in the PR thread
• ❌ Do NOT add any follow-up comments after submitting the review
• ❌ Do NOT reply to confirm task completion
• ❌ Do NOT explain what you did - just do it and stop

Remember: The pull request review is visible to users. Additional comments are redundant noise.

CRITICAL — Verification rules for smoke and gating decisions:
- For each True decision, you must have traced a concrete path: test file → fixture → utility function → modified symbol.
- Do NOT assume impact based on scope, file proximity, or infrastructure-sounding names.
Only set True when you trace a concrete path through steps 6a-6e, then 7 or 8.
WRONG: "utilities/hco.py changed → run smoke" (no traced dependency path)
WRONG: "Run smoke tests: False" with no affected-test list when gating tests use the changed utility
RIGHT: "Run smoke tests: False, Run gating tests: True" plus tests/.../test_foo.py::TestBar::test_baz (gating)
RIGHT: "Smoke test X uses fixture Y → wrapper Z → changed function W in utilities/hco.py"

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Check the file for smoke/gating markers and understand first changed line
fd "test_common_vm_preference.py" --exec cat {}

echo "---MARKERS---"
rg '`@pytest.mark.smoke`|`@pytest.mark.gating`|`@pytest.mark.tier`' tests/infrastructure/instance_types/test_common_vm_preference.py -n

echo "---SMOKE FILES---"
rg -l '`@pytest.mark.smoke`' tests/ | head -20

echo "---GATING FILES---"
rg -l '`@pytest.mark.gating`' tests/ | head -20

echo "---GIT DIFF FIRST CHANGED LINE---"
git diff HEAD~1 -- tests/infrastructure/instance_types/test_common_vm_preference.py | head -40

Length of output: 8312

---

🏁 Script executed:

#!/bin/bash
# Get the PR head commit SHA
PR_SHA=$(gh pr view 5152 --repo RedHatQE/openshift-virtualization-tests --json headRefOid -q '.headRefOid')
echo "PR SHA: $PR_SHA"

# Post inline review comment on the first changed line (line 45 of the new file)
# The changed line in the new file is line 45: image=Images.Fedora.FEDORA_CONTAINER_IMAGE
gh api \
  --method POST \
  -H "Accept: application/vnd.github+json" \
  repos/RedHatQE/openshift-virtualization-tests/pulls/5152/comments \
  -f body="**Test Execution Plan**

**Run smoke tests: False**
No smoke-marked tests call \`start_vm_with_cluster_preference\` or \`run_general_vm_preferences\`.

**Run gating tests: False**
The gating-marked test in this file (\`test_common_preferences_vendor_labels\`) calls \`assert_mismatch_vendor_label\` — it does not call \`start_vm_with_cluster_preference\` and is unaffected by this image change.

**Affected tests to run**

\`\`\`
tests/infrastructure/instance_types/test_common_vm_preference.py::TestCommonVmPreference::test_common_vm_preference_windows  (tier3)
tests/infrastructure/instance_types/test_common_vm_preference.py::TestCommonVmPreference::test_common_vm_preference_linux[rhel]  (tier3)
tests/infrastructure/instance_types/test_common_vm_preference.py::TestCommonVmPreference::test_common_vm_preference_linux[centos]  (tier3)
tests/infrastructure/instance_types/test_common_vm_preference.py::TestCommonVmPreference::test_common_vm_preference_linux[unique]  (tier3)
tests/infrastructure/instance_types/test_common_vm_preference.py::TestCommonVmPreference::test_common_vm_preference_dpdk  (tier3, special_infra)
\`\`\`

All five tests in \`TestCommonVmPreference\` call \`run_general_vm_preferences\` → \`start_vm_with_cluster_preference\`, which contains the changed image reference. Verify that the Fedora image boots cleanly under the windows/rhel/centos/unique/network preferences (particularly \`windows.2k8\` and \`windows.2k12\`) and that namespace teardown completes without \`ResourceTeardownError\`." \
  -f commit_id="$PR_SHA" \
  -f path="tests/infrastructure/instance_types/test_common_vm_preference.py" \
  -F line=45 \
  -f side="RIGHT"

Length of output: 6658

---

---

[geetikakay]

/verified

[openshift-virtualization-qe-bot-3]

@coderabbitai

Test execution plan request details

CRITICAL: You MUST post an inline review comment on the first changed line of the first file.
The inline comment should contain the full Test Execution Plan (smoke decision, gating decision, and specific affected tests).
Do NOT submit a blocking review event (REQUEST_CHANGES/APPROVE).
Post a single inline PR comment on Files Changed (non-blocking COMMENT flow).

As an expert software testing engineer, analyze all modified files in this PR and create a targeted test execution plan.
You will post an inline review comment with the test execution plan on the first changed file.
If you fail to run or post a comment, retry.

Analysis Requirements:

1. Examine code changes in each modified file

2. Identify affected code paths, functions, and classes

3. Analyze pytest-specific elements: fixtures (scope, dependencies), parametrization, markers, conftest changes

4. Trace test dependencies through imports, shared utilities, fixture inheritance, fixture teardown, and yield from cleanup in conftest

5. Detect new tests introduced in the PR

6. Utilities and libs impact (when utilities/ or libs/ changes):
   You MUST use shell scripts (rg, git diff) to trace the full impact.
   Follow these sub-steps in order:

   6a. Identify modified symbols: For each changed file under utilities/ or libs/,
   list every modified function or method.
   Example: git diff HEAD~1 --unified=0 -- utilities/hco.py | grep '^[+-]def '

   6b. Find direct callers: Search tests and conftest for each symbol from 6a.
   Example: rg -l 'get_hco_version' tests/

   6c. Trace fixture teardown and cleanup: Find fixtures that reach
   the modified symbol through yield from or context-manager wrappers.
   Example: rg -l 'yield from.*enable_common_boot|def.*enable_common_boot' tests/

   6d. Trace same-file callers: In each changed file, find other functions
   whose body calls a modified symbol (including code after yield
   in @contextmanager helpers).
   Example: rg 'get_hco_version|enable_common_boot' utilities/hco.py

   6e. Expand transitively: If function A calls modified B, then
   tests/fixtures that call A are affected — even when the test body
   never imports B directly.

   Do NOT limit impact to tests that import the modified symbol only.

7. Smoke test impact: Intersect the affected set from step 6 with smoke-marked tests.
   Run: rg -l '@pytest.mark.smoke' tests/
   VERIFY the above command returned actual file paths before concluding False.
   Set True if either condition is met:

   • a smoke-marked file appears in the affected set from 6b-6e, OR
   • any conftest.py in the smoke test's parent-directory hierarchy (up to repo root)
     imports or calls a modified utilities/libs symbol — including autouse fixtures
     that depend on modified functions. ALL tests in that directory and below are affected.
     Example check: for each smoke_file, scan dirname(smoke_file)/conftest.py,
     dirname(dirname(smoke_file))/conftest.py, etc. for modified symbol imports
     and autouse fixtures that depend on modified symbols.

8. Gating test impact: Intersect the affected set from step 6 with gating-marked tests.
   Run: rg -l '@pytest.mark.gating' tests/
   Set True if a gating-marked file also appears in the affected set from 6b-6e.
   Utilities/libs changes often affect gating tests without affecting smoke tests.
   Do NOT stop analysis after concluding Run smoke tests: False.

Output rules:
Do NOT include analysis step numbers (1-8) in your visible output.

Your deliverable:
Your inline informational comment will be based on the following requirements:

Test Execution Plan

• Run smoke tests: True / False — If True, state the dependency path (test → fixture → changed symbol). True ONLY with a verified path.
• Run gating tests: True / False — If True, state the dependency path. True if any gating-marked test is in the affected set.
• Affected tests to run (required when utilities/, libs/, or shared conftest changes — list concrete paths even when smoke is False)

Use these formats:

• path/to/test_file.py - When the entire test file needs verification
• path/to/test_file.py::TestClass::test_method - When specific test(s) needed
• path/to/test_file.py::test_function - When specific test(s) needed
• -m marker - When a marker covers multiple affected tests (e.g. -m gating only if ALL gating tests in scope need run)
• Tag each listed test or group with its marker when not obvious, e.g. (gating) or (smoke)

Real test commands (MANDATORY when changes affect session/runtime code):

When the affected code runs at session/collection time (conftest fixtures, pytest plugins,
config hooks, session-scoped setup) or modifies runtime behavior that unit tests mock away,
you MUST include concrete pytest commands the PR author must run on a real cluster
to verify the change works end-to-end. Include:

• A command for the error/fix path (the scenario the PR fixes)
• A command for the happy path (regression: the normal case still works)
• Use lightweight tests (e.g., --collect-only for startup failures,
  a single small test for runtime behavior)
  If the PR only changes test logic (not utilities/libs/conftest), the affected test
  paths themselves serve as the real test commands — no separate section needed.

Example output for a session-startup fix:

**Real tests (cluster required)**
Error path (the fix):
`pytest tests/storage/.../test_foo.py --storage-class-matrix=nonexistent-sc --collect-only`
Expected: ValueError with clear message, not IndexError

Happy path (regression):
`pytest tests/storage/.../test_foo.py --storage-class-matrix=<valid-sc> -k test_bar`
Expected: session starts normally

Guidelines:

• Include tests affected directly OR via fixture setup/teardown, yield from cleanup, or transitive utility call chains (caller calls modified helper)
• Use a full file path only if ALL tests in that file require verification
• Use file path + test name when only specific tests use an affected fixture or utility wrapper (preferred for partial file impact)
• If a test marker can cover multiple files/tests, provide the marker
• Balance coverage vs over-testing - Keep descriptions minimal
• Example: if leaf helper foo() changes, include tests whose fixture teardown calls wrapper bar() where bar() calls foo(), even when the test body only imports an unrelated symbol from the same utilities module

Hardware-Related Checks (SR-IOV, GPU, DPDK):

When PR modifies fixtures for hardware-specific resources:

• Collection Safety: Fixtures MUST have existence checks (return None when hardware unavailable)
• Test Plan: MUST verify both WITH and WITHOUT hardware:
  • Run affected tests on cluster WITH hardware
  • Verify collection succeeds on cluster WITHOUT hardware

CRITICAL WORKFLOW COMPLETION RULES:

When responding to this test execution plan request, you MUST follow these rules EXACTLY:

1. YOUR ONLY DELIVERABLE: Post one non-blocking inline comment containing the test execution plan on the first changed line
2. THEN STOP IMMEDIATELY - Do NOT generate any additional response
3. FALLBACK ONLY: If inline comment API calls fail after retrying, post as a regular PR comment
4. SILENCE = SUCCESS: After successfully submitting the review, your task is complete. No confirmation needed.

ABSOLUTE PROHIBITIONS (violating these creates empty/meaningless reviews):

• ❌ Do NOT post acknowledgment messages like "Test execution plan posted", "Review posted successfully", "I've successfully posted"
• ❌ Do NOT mention review IDs, URLs, or confirmation of posting in the PR thread
• ❌ Do NOT add any follow-up comments after submitting the review
• ❌ Do NOT reply to confirm task completion
• ❌ Do NOT explain what you did - just do it and stop

Remember: The pull request review is visible to users. Additional comments are redundant noise.

CRITICAL — Verification rules for smoke and gating decisions:
- For each True decision, you must have traced a concrete path: test file → fixture → utility function → modified symbol.
- Do NOT assume impact based on scope, file proximity, or infrastructure-sounding names.
Only set True when you trace a concrete path through steps 6a-6e, then 7 or 8.
WRONG: "utilities/hco.py changed → run smoke" (no traced dependency path)
WRONG: "Run smoke tests: False" with no affected-test list when gating tests use the changed utility
RIGHT: "Run smoke tests: False, Run gating tests: True" plus tests/.../test_foo.py::TestBar::test_baz (gating)
RIGHT: "Smoke test X uses fixture Y → wrapper Z → changed function W in utilities/hco.py"

[openshift-virtualization-qe-bot-6]

Successfully removed PR tag: quay.io/openshift-cnv/openshift-virtualization-tests:pr-5152.

[openshift-virtualization-qe-bot-6]

New container for quay.io/openshift-cnv/openshift-virtualization-tests:latest published

[geetikakay]

/cherry-pick cnv-4.22

[openshift-virtualization-qe-bot-4]

Cherry-picked PR Use Fedora image for common VM preference tests into cnv-4.22: #5194

[RoniKishner]

/cherry-pick cnv-4.21

[openshift-virtualization-qe-bot]

Cherry-picked PR Use Fedora image for common VM preference tests into cnv-4.21: #5411

[RoniKishner]

/cherry-pick cnv-4.20

[openshift-virtualization-qe-bot-6]

Cherry-picked PR Use Fedora image for common VM preference tests into cnv-4.20: #5412

[RoniKishner]

/cherry-pick cnv-4.19

[RoniKishner]

/cherry-pick cnv-4.18

[openshift-virtualization-qe-bot-5]

Cherry-picked PR Use Fedora image for common VM preference tests into cnv-4.19: #5413

[openshift-virtualization-qe-bot-2]

Cherry-pick conflicts were resolved by AI

Cherry-picked PR Use Fedora image for common VM preference tests into cnv-4.18: #5414
Conflicts were automatically resolved by AI (claude/claude-opus-4-6-1m).

@geetikakay Manual verification is required — please review the changes and test before merging.