fix(olm): fix ConversionWebhook spec.conversion lifecycle during CSV upgrades - #1348
fix(olm): fix ConversionWebhook spec.conversion lifecycle during CSV upgrades#1348ugiordan wants to merge 2 commits into
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Included review availability: Your plan includes up to 1 review per rolling hour; 0 remain after this review. WalkthroughThe installer defers conversion webhook configuration until deployment readiness. Webhook checks apply the deferred configuration through the active installer. CRD cleanup preserves webhooks covered by replacement CSVs. ChangesConversion webhook lifecycle
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The change defers conversion configuration until the deployment is ready and clears stale configuration when a replacement drops it; no actionable merge-blocking risk remains based on the supplied evidence. Suggested reviewers: 🚥 Pre-merge checks | ✅ 14 | ❌ 1❌ Failed checks (1 inconclusive)
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[APPROVALNOTIFIER] This PR is NOT APPROVED This pull-request has been approved by: ugiordan The full list of commands accepted by this bot can be found here. DetailsNeeds approval from an approver in each of these files:Approvers can indicate their approval by writing |
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Inline comments:
In `@staging/operator-lifecycle-manager/pkg/controller/operators/olm/operator.go`:
- Line 2617: Update the deployment readiness flow around areWebhooksAvailable so
it is invoked only when strategyInstalled is true and strategyErr is nil;
otherwise leave webhooksInstalled false and preserve the existing requeue or
deployment-error status handling. Add a regression test covering an unready
deployment and verifying conversion configuration is not attempted before
readiness.
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staging/operator-lifecycle-manager/pkg/controller/install/deployment.gostaging/operator-lifecycle-manager/pkg/controller/operators/olm/apiservices.gostaging/operator-lifecycle-manager/pkg/controller/operators/olm/operator.go
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Inline comments:
In `@staging/operator-lifecycle-manager/pkg/controller/operators/olm/operator.go`:
- Around line 1313-1321: The conversion cleanup flow must not continue when the
CSV list operation fails, because coveredCRDs may be incomplete. In the
CSV-listing logic before the coveredCRDs loop, log the error and return or
otherwise skip the cleanup until a complete list is available; preserve cleanup
behavior for successful listings.
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staging/operator-lifecycle-manager/pkg/controller/operators/olm/operator.go
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…upgrades Two bugs fixed: 1. Upgrade race: spec.conversion was written to CRDs during Install() before any pod from the new deployment was ready. Once set, the apiserver routes conversion calls to the new service endpoint, but since no pod is serving /convert yet, those calls return HTTP 404. Fix: skip ConversionWebhook descriptors in createOrUpdateCertResourcesForDeployment() so spec.conversion is never written during Install(). Add EnsureConversionWebhooks() on *StrategyDeploymentInstaller and call it from areWebhooksAvailable(), which is only reached after CheckInstalled() confirms pods are ready. Gate areWebhooksAvailable() behind strategyInstalled && strategyErr == nil to ensure EnsureConversionWebhooks() is never called prematurely. 2. Missing cleanup when replacement CSV drops the ConversionWebhook: handleClusterServiceVersionDeletion returned unconditionally when any replacement CSV was found, assuming the replacement would manage spec.conversion. If the replacement dropped the ConversionWebhook entirely, spec.conversion stayed pointing at the now-deleted service, causing all CR conversion requests to fail. Fix: build the set of CRDs still covered by a ConversionWebhook in the replacement CSV. Only reset spec.conversion to NoneConverter for CRDs the new CSV dropped. CRDs the replacement still covers are left intact. Return early if the CSV list fails to avoid incorrectly clearing spec.conversion with an incomplete picture. Also adds a nil guard on crd.Spec.Conversion before writing to it, fixing a latent panic in the no-replacement path. Co-Authored-By: Claude <claude-sonnet-4-6> <noreply@anthropic.com>
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- apiservices.go: return an explicit error when the type assertion to *StrategyDeploymentInstaller fails in areWebhooksAvailable. Previously EnsureConversionWebhooks() was silently skipped, leaving spec.conversion unwritten and causing a confusing "conversionWebhook not ready" error downstream with no indication of the real cause. - operator.go: drop the redundant strategyErr == nil guard in updateInstallStatus. CheckInstalled never returns (true, non-nil error) so the condition was equivalent to strategyInstalled alone. Add a comment explaining this so the intent is clear. Co-Authored-By: Claude <claude-sonnet-4-6> <noreply@anthropic.com>
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Problems
1. spec.conversion written before pods are ready (upgrade race)
During an OLM-managed upgrade,
spec.conversionis written to CRDs duringInstall()— specifically insideinstallDeployments()→createOrUpdateCertResourcesForDeployment()— before any pod from the new deployment is scheduled or ready.Once
spec.conversionis set, the apiserver routes conversion calls to the new webhook service endpoint. But since no new pod is serving/convertyet, those calls return HTTP 404. This breaks CRD version conversion mid-upgrade and causes upgrade failures.Empirical evidence from testing:
manager=catalogwritesspec.conversionat T+0 (no caBundle),manager=olmoverwrites at T+8s (adds caBundle, points to new service) — both happen before any new pod is ready.This is the root cause of the RHOAI 3.5 GA blocker RHOAIENG-76183.
2. spec.conversion not cleared when replacement CSV drops the ConversionWebhook
handleClusterServiceVersionDeletionreturned unconditionally when any replacement CSV was found, assuming the replacement would managespec.conversiongoing forward. If the replacement dropped the ConversionWebhook entirely,spec.conversionwas left pointing at the now-deleted service. All CR conversion requests then fail with connection refused.Fixes
Fix 1: defer spec.conversion write until deployment is ready
Skip
ConversionWebhookdescriptors increateOrUpdateCertResourcesForDeployment()so thatspec.conversionis never written duringInstall().Add
EnsureConversionWebhooks()on*StrategyDeploymentInstallerand call it fromareWebhooksAvailable(), which is only invoked fromupdateInstallStatus()afterCheckInstalled()confirms the deployment's pods are ready. GateareWebhooksAvailable()behindstrategyInstalled && strategyErr == nilsoEnsureConversionWebhooks()is never called before readiness is confirmed.Why not extend the StrategyInstaller interface?
EnsureConversionWebhooks()is intentionally a concrete method on*StrategyDeploymentInstallerrather than an interface method. Adding it toStrategyInstallerwould require updatingNullStrategyInstallerand all generated counterfeiter fakes. TheareWebhooksAvailable()call site type-asserts to*StrategyDeploymentInstallerbefore calling the method — a safe assert sinceNullStrategyInstallernever hasConversionWebhookentries.Fix 2: clear spec.conversion for CRDs dropped by the replacement CSV
Instead of returning unconditionally when a replacement CSV is found, build the set of CRDs still covered by a ConversionWebhook in the replacement. Only reset
spec.conversiontoNoneConverterfor CRDs the new CSV dropped. CRDs the replacement still covers are left intact so in-flight conversion calls keep working during a normal upgrade.Also adds a nil guard on
crd.Spec.Conversionbefore writing to it, fixing a latent panic in the no-replacement path.Files changed
staging/operator-lifecycle-manager/pkg/controller/install/deployment.go: skip ConversionWebhook increateOrUpdateCertResourcesForDeployment(), addEnsureConversionWebhooks()staging/operator-lifecycle-manager/pkg/controller/operators/olm/apiservices.go: addinstallerparam toareWebhooksAvailable(), callEnsureConversionWebhooks()before checking CRD statestaging/operator-lifecycle-manager/pkg/controller/operators/olm/operator.go: gateareWebhooksAvailable()behindstrategyInstalled && strategyErr == nil; fixhandleClusterServiceVersionDeletionto only clearspec.conversionfor CRDs the replacement CSV droppedTesting
Both packages compile cleanly:
Companion operator-side fix: opendatahub-io/opendatahub-operator#3958 removes
ConversionWebhookfrom the bundle CRD manifests and adds a runtime Runnable to patchspec.conversionafter the webhook server is confirmed ready.Summary by CodeRabbit