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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 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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…diness Defer CRD conversion webhook writes until the strategy deployment is ready, preserve conversion configuration during replacements, clear dropped configurations, and use the OLM-managed CA Secret while calculating the deployment hash before the CRD is configured. Co-Authored-By: Claude <gpt-5.6-luna> <noreply@anthropic.com>
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| webhooksInstalled := false | ||
| var webhookErr error | ||
| if strategyInstalled { | ||
| webhooksInstalled, webhookErr = a.areWebhooksAvailable(csv, installer) |
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areWebhooksAvailable also calls cleanUpRemovedWebhooks - are we also waiting to cleanup removed webhooks until the deployment is up? could this introduce a period of failures due to unbacked validating or mutating webhooks? should we still somehow clean up removed webhooks whether the deployment is up or not?
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You're right, the readiness gate was also delaying the cleanup of removed validating and mutating webhook configurations. I split cleanup from availability checks. cleanUpRemovedWebhooks now runs from updateInstallStatus even while the deployment is coming up, while conversion webhook activation remains gated until the deployment is ready. I added a regression test for this case, and the OLM controller and install tests pass.
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I left a small comment. I'd also maybe ask for an e2e to exercise this fix. Wdyt?
@perdasilva, totally agree; I forgot about it. Added an E2E case covering an unready conversion-webhook replacement. |
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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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