fix(olm): fix ConversionWebhook spec.conversion lifecycle during CSV upgrades - #3892
fix(olm): fix ConversionWebhook spec.conversion lifecycle during CSV upgrades#3892ugiordan wants to merge 4 commits into
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Included review availability: Your plan includes up to 4 reviews per rolling hour; 3 remain after this review. 📝 WalkthroughWalkthroughDeployment installation now defers ChangesConversion webhook readiness
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The change is merge-ready after normal checks and review; no actionable merge-blocking risk remains. Sequence Diagram(s)sequenceDiagram
participant StrategyInstaller
participant areWebhooksAvailable
participant StrategyDeploymentInstaller
participant ConversionCRDs
StrategyInstaller->>areWebhooksAvailable: Check after successful installation
areWebhooksAvailable->>StrategyDeploymentInstaller: EnsureConversionWebhooks
StrategyDeploymentInstaller-->>areWebhooksAvailable: Return success or error
areWebhooksAvailable->>ConversionCRDs: Validate conversion webhook availability
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Inline comments:
In `@pkg/controller/operators/olm/operator.go`:
- Around line 1312-1322: The CSV-list failure path in the cleanup logic must not
continue with an empty coveredCRDs set. Update the surrounding operator flow
before coveredCRDs is built to return and requeue or otherwise retry when
listing CSVs fails, preserving existing conversion settings until the
replacement CSV coverage can be determined.
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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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…oksAvailable Co-Authored-By: Claude <claude-sonnet-4-6> <noreply@anthropic.com>
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 insideinstallDeployments()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. Since no new pod is serving/convertyet, those calls return HTTP 404. This breaks CRD version conversion mid-upgrade.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
pkg/controller/install/deployment.go: skip ConversionWebhook increateOrUpdateCertResourcesForDeployment(), addEnsureConversionWebhooks()pkg/controller/operators/olm/apiservices.go: addinstallerparam toareWebhooksAvailable(), callEnsureConversionWebhooks()before checking CRD statepkg/controller/operators/olm/operator.go: gateareWebhooksAvailable()behindstrategyInstalled && strategyErr == nil; fixhandleClusterServiceVersionDeletionto only clearspec.conversionfor CRDs the replacement CSV droppedRelated
Downstream: openshift/operator-framework-olm#1348
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