ROX-36296: update version selector during delete - #2773
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Included review availability: Your plan provides up to 12 included reviews per hour; 11 remain after this review. 📝 WalkthroughWalkthroughCentral deletion now waits for the Central version-selector label to match the configured rollout group. Pending deletion continues normal reconciliation, resynchronizes ArgoCD, and prevents managed database provisioning. ChangesCentral deletion synchronization
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: ⚪ Minimal · up to The PR updates version-selector handling during deletion, with no actionable merge-blocking risk remaining; it is merge-ready after normal Go checks. Sequence Diagram(s)sequenceDiagram
participant Reconciler
participant ArgoCDApplication
participant CentralCR
participant ManagedDB
Reconciler->>ArgoCDApplication: Read configured rollout group
Reconciler->>CentralCR: Read named resource label
CentralCR-->>Reconciler: Return version-selector label
Reconciler->>ManagedDB: Look up connection without provisioning
Reconciler->>Reconciler: Continue or proceed with deletion
``
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<summary>🚥 Pre-merge checks | ✅ 4 | ❌ 1</summary>
### ❌ Failed checks (1 warning)
| Check name | Status | Explanation | Resolution |
| :----------------: | :--------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------- |
| Docstring Coverage | ⚠️ Warning | Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 3 files. | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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<summary>✅ Passed checks (4 passed)</summary>
| Check name | Status | Explanation |
| :------------------------: | :------- | :----------------------------------------------------------------------------------------------------------------------------- |
| 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. |
| Title check | ✅ Passed | The title clearly identifies the version-selector update during deletion and includes the relevant issue reference. |
| Description check | ✅ Passed | The description follows the repository template, which permits an empty description and includes the relevant issue reference. |
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Actionable comments posted: 1
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Inline comments:
In `@fleetshard/pkg/central/reconciler/reconciler.go`:
- Around line 352-365: Update the reconciler lookup around centralCRList to use
client.Get with remoteCentral.Metadata.Namespace and
remoteCentral.Metadata.Name, rather than listing and selecting the first Central
CR. Return synchronized only when the named resource produces an IsNotFound
error; otherwise preserve error propagation and compare the retrieved resource’s
version-selector label with expected. Add a regression test covering two Central
CRs in the same namespace.
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fleetshard/pkg/central/reconciler/argo_reconciler.gofleetshard/pkg/central/reconciler/reconciler.gofleetshard/pkg/central/reconciler/reconciler_test.gofleetshard/pkg/k8s/constants.gofleetshard/pkg/testutils/k8s.go
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Tested manually based on the coderabbit generated testing steps. Verified that deletion remains pending while the label is stale, and continues when the label is restored. |
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/retest |
| // The DB connection string is intentionally left empty here: the instance is being | ||
| // deleted, so there's no live traffic to break, and computing it for real could otherwise | ||
| // trigger (re-)provisioning a managed DB for an instance that never got that far before | ||
| // being deleted. |
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An empty string will trigger a redeployment of Central. Without a valid value, this will likely cause a CrashLoopBackOff during deletion, which could affect our monitoring and SLIs. Therefore, I recommend keeping the actual connection string here or avoiding an extra app reconciliation (see the comment below).
| if appExists { | ||
| // The DB connection string is intentionally left empty here: the instance is being | ||
| // deleted, so there's no live traffic to break, and computing it for real could otherwise | ||
| // trigger (re-)provisioning a managed DB for an instance that never got that far before | ||
| // being deleted. | ||
| if err := r.argoReconciler.ensureApplicationExists(ctx, remoteCentral, ""); err != nil { |
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Instead of adding an extra application reconciliation during deletion, could we skip the deletion branch until the rolloutGroup label is reconciled?
We could extract the shouldDelete function from line 178:
...
if r.shouldDelete(ctx, remoteCentral) {
status, err := r.reconcileInstanceDeletion(ctx, remoteCentral)
shouldUpdateCentralHash = err == nil
return status, err
}
...
func (r *CentralReconciler) shouldDelete(ctx context.Context, remoteCentral private.ManagedCentral) bool {
return remoteCentral.Metadata.DeletionTimestamp != "" && r.versionSelectorMatchesRolloutGroup(ctx, remoteCentral)
}
It looks simpler IMO
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/retest |
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: kovayur, Stringy The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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Thanks @Stringy! I made some improvements to the E2E test retry logic. You might want to rebase your changes. |
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New changes are detected. LGTM label has been removed. |
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/retest |
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The following was generated by
@coderabbitaiand may be updated automatically.Summary
Deletion now waits until the Central CR has the configured rollout-group version-selector label. Pending deletions continue normal reconciliation and resync ArgoCD. The reconciler does not provision a new managed database while deletion is pending.
Tests cover stale labels, label synchronization, managed database preservation, and missing database provisioning.
[JIRA: ROX-36296](https://issues.redhat.com/browse/ROX-36296)
Checklist (Definition of Done)
Test manualTest manual