Handle version parity in FAR upgrade test

[ugreener]

Problem

The FAR upgrade periodic job (4.22-upgrade-e2e-far-upgrade-aws) failed on Aug 14 because the GA redhat-operators catalog on OCP 4.22 was updated to include FAR v0.8.1, matching the Konflux FBC catalog version. Step 9 waited 900s for a CSV with a different name that would never appear, since OLM does not create a new CSV when the resolved version matches the installed one.

The test assumed the Konflux catalog always offers a higher version than the GA catalog.

Summary

Step 9 now checks the OLM subscription status after the catalog switch and handles both upgrade and version-parity scenarios, with guards against false-positive parity matches during OLM reconciliation.

Changes

• Capture subscription ResourceVersion before the catalog switch; require it to change before evaluating parity vs upgrade (prevents false-positive on stale subscription status)
• Poll subscription InstalledCSV == CurrentCSV to ensure OLM finished reconciling
• Check CatalogSourcesUnhealthy condition using typed OLM SDK constants (SubscriptionCatalogSourcesUnhealthy, corev1.ConditionTrue)
• Replace List+loop CSV check with direct olm.PullClusterServiceVersion call
• Wrap bare PullSubscription error with namespace/name context
• Surface GetPhase() errors in both Step 9 and verifyFAROperatorReady (was silently ignored)
• Step 10 (image check) is conditional on whether an actual upgrade occurred
• Step 11 (remediation) always runs to validate operator health after the catalog switch
• Update README test 16 pass criteria to document version-parity conditional behavior

Jira: RHWA-971

Summary by CodeRabbit

• Bug Fixes

  • Improved operator upgrade validation when switching catalogs without changing versions.
  • Added checks for subscription synchronization, catalog health, and successful operator readiness.
  • Prevented unnecessary controller image verification when the operator version remains unchanged.
  • Improved diagnostics for catalog switches that retain the current version.

• Documentation

  • Clarified expected upgrade outcomes when catalog and operator versions match.

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• tests/far-operator/tests/upgrade.go

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📝 Walkthrough

Walkthrough

Changes

The FAR operator upgrade test validates the selected CSV and distinguishes operator version changes from same-version catalog switches. Controller image checks run only after an actual operator upgrade.

Operator upgrade validation

Layer / File(s)	Summary
CSV upgrade state and validation tests/far-operator/tests/upgrade.go, tests/far-operator/README.md	The test validates Subscription reconciliation, catalog source, CSV synchronization, catalog health, CSV readiness errors, version parity, and conditional controller image changes.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to 05d19

The PR updates the FAR upgrade test to handle both version-parity and actual-upgrade outcomes; no actionable merge-blocking risk remains beyond normal checks and review.

Possibly related PRs

• medik8s/system-tests#54: Refines related upgrade validation logic and pass criteria.
• medik8s/system-tests#75: Modifies related upgrade baselines and validation.

Suggested reviewers: mhabashrh, mpryc

🚥 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
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: handling version parity in the FAR upgrade test.
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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[qodo-2-for-medik8s]

PR Summary by Qodo

Handle version parity in FAR operator upgrade e2e test

🐞 Bug fix 🧪 Tests 🕐 20-40 Minutes

AI Description

• Prevent Step 9 timeouts when GA and Konflux catalogs resolve the same FAR CSV.
• Detect OLM reconciliation completion and catalog health before deciding upgrade vs parity.
• Run image verification only on real upgrades, while always validating remediation post-switch.

Diagram

graph TD
  T["upgrade.go: Step 9"] --> K[("Kubernetes API")] --> S["Subscription"] --> D{"Installed==Current?"}
  D -->|"no"| W["Wait / retry"] --> D
  D -->|"yes"| C{"Catalog unhealthy?"}
  C -->|"yes"| E["Fail fast"]
  C -->|"no"| V["Current CSV Succeeded"] --> U{"CSV changed?"}
  U -->|"yes"| I["Step 10: image check"] --> R["Step 11: remediation"]
  U -->|"no"| P["Skip image check"] --> R

Loading

High-Level Assessment

The following are alternative approaches to this PR:

1. Drive logic off InstallPlan transitions

• ➕ InstallPlanRef/InstallPlan phase changes can be a clearer upgrade signal than scanning CSVs
• ➕ May reduce reliance on CSV name patterns
• ➖ Parity case may not create a new InstallPlan, so you still need a parity path
• ➖ InstallPlan timing/GC can be flaky across environments

2. Compare operator versions explicitly (CSV version/annotations)

• ➕ Directly encodes the intent: detect semver upgrade vs same version
• ➕ Avoids conflating name equality with version equality
• ➖ Requires parsing/version normalization and stable metadata sources
• ➖ Still needs reconciliation guards to avoid transient mismatches

3. Use watch/informer-based waiting instead of polling

• ➕ More deterministic than polling with large timeouts
• ➕ Can react immediately to reconciliation completion
• ➖ More complex test code and lifecycle management
• ➖ Harder to keep lightweight for e2e suites

Recommendation: The PR’s approach (wait for InstalledCSV==CurrentCSV, fail fast on CatalogSourcesUnhealthy, then verify CurrentCSV Succeeded and branch on CSV change) is the best fit for an e2e test: minimal additional machinery while directly addressing the real failure mode. If this logic expands further, consider extracting a small helper that waits for “subscription settled” (Installed==Current + healthy conditions) for reuse elsewhere.

Files changed (1) +86 / -30

Bug fix (1) +86 / -30

upgrade.goMake Step 9 handle upgrade vs version-parity after catalog switch +86/-30

Make Step 9 handle upgrade vs version-parity after catalog switch

• Adds a Step 9 reconciliation guard by polling Subscription until InstalledCSV equals CurrentCSV and the catalog is healthy, then verifies the resolved CurrentCSV is Succeeded. Tracks whether a real upgrade occurred to conditionally run the Step 10 image check, while keeping Step 11 remediation validation unconditional. Improves error reporting by surfacing GetPhase() failures.

tests/far-operator/tests/upgrade.go

[qodo-2-for-medik8s]

Code Review by Qodo

🐞 Bugs (0) 📘 Rule violations (0) 📜 Skill insights (0)

1. Unchecked subscription dereference ✓ Resolved 🐞 Bug ☼ Reliability

Description

Step 9 dereferences sub.Object (Spec/Status) immediately after olm.PullSubscription without
validating it is non-nil. In this repo’s vendored eco-goinfra, SubscriptionBuilder.Exists()
returns true for any non-NotFound GET error, so PullSubscription can return (builder, nil) with
builder.Object == nil, causing a nil-pointer panic instead of a retriable error.

Code

tests/far-operator/tests/upgrade.go[R273-276]

+					if sub.Object.Spec.CatalogSource != medik8sparams.UpgradeCatalogName {
+						return fmt.Errorf("subscription source not yet updated to %s",
+							medik8sparams.UpgradeCatalogName)
+					}

Relevance

●●● Strong

Nil-deref risk is a deterministic reliability fix; teams usually add nil checks/handle unexpected
client behavior.

ⓘ Recommendations generated based on similar findings in past PRs

Evidence

Step 9 dereferences sub.Object.Spec/Status after olm.PullSubscription. The vendored Exists()
treats any non-NotFound error as “exists”, and PullSubscription then returns nil error while
assigning builder.Definition = builder.Object (which may be nil), making sub.Object potentially
nil at the Step 9 dereference site.

tests/far-operator/tests/upgrade.go[266-276]
vendor/github.com/rh-ecosystem-edge/eco-goinfra/pkg/olm/subscription.go[221-235]
vendor/github.com/rh-ecosystem-edge/eco-goinfra/pkg/olm/subscription.go[287-335]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
Step 9 assumes `olm.PullSubscription(...)` returning `nil` error implies `sub.Object` is populated, and then dereferences `sub.Object.Spec/Status`. However, the vendored eco-goinfra implementation can return `nil` error with a nil `Object` on non-NotFound API errors, which will panic the test.

### Issue Context
The nil dereference happens inside an `Eventually(func() error { ... })` callback, so panicking here is particularly harmful: it turns transient API hiccups into hard crashes rather than a normal retry.

### Fix Focus Areas
- tests/far-operator/tests/upgrade.go[266-296]
- vendor/github.com/rh-ecosystem-edge/eco-goinfra/pkg/olm/subscription.go[221-235]
- vendor/github.com/rh-ecosystem-edge/eco-goinfra/pkg/olm/subscription.go[287-335]

### Suggested change
In the Step 9 `Eventually` callback, add a defensive guard right after `PullSubscription`:
- If `sub == nil || sub.Object == nil || sub.Object.Spec == nil`, return a descriptive error (so `Eventually` retries) instead of dereferencing.

Optionally (more robust): avoid `PullSubscription` here and use a direct client `Get` for the Subscription object (or a helper that guarantees a populated object-or-error contract).

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

---

2. Premature parity success ✓ Resolved 🐞 Bug ≡ Correctness

Description

Step 9 can return success as “version parity” as soon as the previous CSV is Succeeded and
InstalledCSV == CurrentCSV, even if OLM hasn’t yet reconciled the Subscription against the new
catalog after the spec update. This can incorrectly skip the upgrade/image verification path when an
upgrade is actually pending, making the test pass incorrectly or become flaky.

Code

tests/far-operator/tests/upgrade.go[R283-286]

+					installedCSV := sub.Object.Status.InstalledCSV
+					if installedCSV != currentCSV {
+						return fmt.Errorf(
+							"OLM still reconciling (installed: %s, current: %s)",

Relevance

●● Moderate

Potentially flaky/semantic OLM timing issue; aligns with intent, but needs domain agreement to
change polling logic.

ⓘ Recommendations generated based on similar findings in past PRs

Evidence

The catalog switch helper only mutates Subscription.spec and updates the object, so it does not
itself cause any immediate change to Subscription.status fields used by Step 9. Step 9 can therefore
observe updated spec + unchanged status (with InstalledCSV == CurrentCSV and the previous CSV
already Succeeded) and return nil via the parity branch before OLM has updated status based on the
new catalog.

tests/internal/helpers/olm.go[95-113]
tests/far-operator/tests/upgrade.go[273-289]
tests/far-operator/tests/upgrade.go[311-326]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
The Step 9 logic uses `InstalledCSV == CurrentCSV` and `spec.catalogSource == target` as a proxy for “OLM reconciliation finished”, then treats `currentCSV == previousCSV` + Succeeded as “parity”. But the catalog switch code updates **only** `Subscription.spec`, so there is a window where spec already points to the new catalog while status still reflects the old resolution (and will still satisfy `InstalledCSV == CurrentCSV`).

### Issue Context
This can cause Step 9 to exit successfully (parity path) before OLM processes the catalog change; if an upgrade was actually going to be resolved moments later, Step 10 gets skipped and the test no longer validates the upgrade.

### Fix Focus Areas
- tests/far-operator/tests/upgrade.go[257-333]
- tests/internal/helpers/olm.go[95-113]

### Suggested change
Before switching catalogs (or immediately after), capture a “pre-switch” reconciliation marker from Subscription status (examples):
- `oldLastUpdated := sub.Object.Status.LastUpdated`
- or a snapshot of `Status.CatalogHealth`

In Step 9, before deciding parity vs upgrade, require evidence that status has been updated **after** the switch, e.g.:
- `sub.Object.Status.LastUpdated != oldLastUpdated`, and/or
- `Status.CatalogHealth` contains an entry whose `CatalogSourceRef.Name == UpgradeCatalogName` and `Healthy == true`.

Only after that marker is observed should `currentCSV == previousCSV` be treated as true “version parity”. (If the marker never arrives, keep retrying or fail with a clear error.)

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

---

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Actionable comments posted: 1

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Inline comments:
In `@tests/far-operator/README.md`:
- Line 201: Align the FAR deployment pass criteria with the upgrade assertion by
removing the unsupported CSV version and catalog-switch conditions from the
criteria, unless the test is updated to explicitly validate CSV versions and
catalog contents. Keep only outcomes actually asserted by the test, including
the currentCSV versus previousCSV.Object.Name check.

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[ugreener]

/test 4.22-upgrade-e2e-far-upgrade-presubmit-aws

[razo7]

Which catalog switch?

[ugreener]

There is a single catalog switch, in Step 8: the Subscription's spec.catalogSource moves from redhat-operators to the Konflux medik8s-catalog. Step 9 performs no switch; it waits for OLM to reconcile that change and then observes one of two outcomes: an operator upgrade (a new CSV) or version parity (the same CSV, with the new catalog reported healthy).

Reworded the Step 9 label to make the switch antecedent and name the two outcomes:
By("Step 9: Wait for operator upgrade or version parity after catalog switch")

HEAD e30cf24, tests/far-operator/tests/upgrade.go:271.

[razo7]

spec.catalogSource moves from redhat-operators to the Konflux medik8s-catalog makes sense 👍🏻

[ugreener]

/test 4.22-upgrade-e2e-far-upgrade-presubmit-aws

[razo7]

nice work

[openshift-ci]

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