Stop image-probe Job from churning pods on failure

[karelyatin]

The image-probe Job added in 53046e5 (OSPRH-33113) always passed an empty beforeHash to job.NewJob, so job.DoJob treated it as "changed" on every reconcile. Once the Job finished and its default 10-minute TTL expired, it was garbage-collected and immediately recreated by the next reconcile, spawning a new pod and hitting BackoffLimitExceeded in an endless loop for any deployment resolving to a WSGI-only image -- now the common case as the image rollout progresses.

Invert the probe command so the common WSGI-only case produces a quiet Succeeded Job instead of a repeatedly-retried Failed one, only call DoJob when the Job doesn't exist yet (instead of relying on the broken hash-changed detection), and always preserve the Job (no TTL) so it is never garbage-collected and re-run once it has a result.

Related-Issue: #OSPRH-33113

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• internal/neutronapi/imageprobe.go

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📝 Summary

Summary by CodeRabbit

• Bug Fixes
  • Improved image probe results for WSGI-only images and images containing the Neutron server binary.
  • Existing probe jobs now determine the selected server mode based on their status; pending jobs use the instance’s configured mode without creating duplicate probes.
  • Probe jobs are refreshed when they target a different image, so results reflect the current image.

Walkthrough

The image probe now tests whether /usr/bin/neutron-server is absent. WSGI detection checks an existing probe Job, handles its status and image, and creates a preserved Job only when the lookup returns NotFound.

Changes

WSGI image probe

Layer / File(s)	Summary
Probe command and Job status internal/neutronapi/imageprobe.go	The probe command succeeds when the Neutron server binary is absent. IsWSGIEffective returns true for a succeeded Job and false for a failed Job. It returns instance.IsWSGI() for a pending Job or a non-NotFound lookup error. If the Job image differs, the function deletes the Job and returns true. If no Job exists, it creates a preserved Job regardless of instance.Spec.PreserveJobs.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 9948a

Changing the image leads to a fresh probe rather than reuse of the old result. No actionable merge-blocking risk remains after normal checks.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the primary change: preventing image-probe Job pod churn after failure.
Description check	✅ Passed	The description directly explains the image-probe Job churn problem and the implemented fixes, including probe inversion, conditional DoJob calls, and Job preservation.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.
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.

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Inline comments:
Review comments at @internal/neutronapi/imageprobe.go:
- Line 133: Update the succeeded-job handling in the image probe flow to compare
the preserved Job’s container image with the current
`instance.Spec.ContainerImage`. Reuse the existing probe-job replacement or
versioning path when they differ, and only return the succeeded result when the
images match.

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• internal/neutronapi/imageprobe.go

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[centosinfra-prod-github-app]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://gateway-cloud-softwarefactory.apps.ocp.cloud.ci.centos.org/zuul/t/rdoproject.org/buildset/de0f3fed3675458ea9b7bfa987c88169

✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 12m 00s
❌ neutron-operator-tempest-multinode NODE_FAILURE Node(set) request 099-0000229181 failed in 0s

[karelyatin]

recheck node failure

[centosinfra-prod-github-app]

Build succeeded (check pipeline).
https://gateway-cloud-softwarefactory.apps.ocp.cloud.ci.centos.org/zuul/t/rdoproject.org/buildset/609b2c4c39cf40b695c72d358ec0111f

✔️ openstack-k8s-operators-content-provider SUCCESS in 3h 11m 47s
✔️ neutron-operator-tempest-multinode SUCCESS in 2h 03m 06s

[openshift-ci]

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