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@ssonigra: This pull request references Jira Issue OCPBUGS-123509, which is invalid:
Comment The bug has been updated to refer to the pull request using the external bug tracker. DetailsIn response to this:
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. Summary by CodeRabbit
WalkthroughThe change makes managed namespace detection explicit. Multus recalculates its ignored namespace list on every render. The operconfig controller reconciles when a namespace enters or leaves the managed set. ChangesManaged Namespace Reconciliation
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant Namespace
participant namespacePredicate
participant reconcileOperConfig
participant renderMultusAdmissonControllerConfig
participant getOpenshiftNamespaces
Namespace->>namespacePredicate: create, update, or delete event
namespacePredicate->>reconcileOperConfig: enqueue matching event
reconcileOperConfig->>renderMultusAdmissonControllerConfig: render configuration
renderMultusAdmissonControllerConfig->>getOpenshiftNamespaces: refresh ignored namespaces
getOpenshiftNamespaces-->>renderMultusAdmissonControllerConfig: sorted namespace names
Merge Risk: ⚪ Minimal · up to Namespace changes refresh the Multus ignored-namespace configuration, while namespace-list failures preserve the existing applied configuration. No merge-blocking risk was identified. Caution Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional.
❌ Failed checks (1 error)
✅ Passed checks (23 passed)
Full details: E2e Tests For Feature ChangesExplanation The pull request changes user-facing behavior and fixes a bug. The diff adds Namespace watches and refreshes the Multus ignored-namespace list in Resolution Add or modify appropriate files under
✨ Finishing Touches🧪 Generate unit tests (beta)
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[APPROVALNOTIFIER] This PR is NOT APPROVED This pull-request has been approved by: ssonigra 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 `@pkg/network/multus_admission_controller.go`:
- Around line 72-74: Update renderMultusAdmissonControllerConfig to return the
error from getOpenshiftNamespaces instead of logging and continuing with an
empty namespace list; ensure rendering stops and the existing configuration
remains unchanged when namespace discovery fails.
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pkg/controller/operconfig/operconfig_controller.gopkg/controller/operconfig/operconfig_controller_test.gopkg/network/multus_admission_controller.gopkg/network/multus_admission_controller_test.go
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Recompute the Multus admission controller ignore list when namespaces matching the existing monitoring label and management annotation are created, updated, or deleted. Enqueue network operator reconciliation from namespace events so ACM-created namespaces are handled without restarting CNO. Stop rendering when the namespace list cannot be read.
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@ssonigra: The following test failed, say
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| for _, ns := range nsList.Items { | ||
| // add OpenShift components to ignored namespace | ||
| if metav1.HasAnnotation(ns.ObjectMeta, "workload.openshift.io/allowed") && ns.Annotations["workload.openshift.io/allowed"] == "management" { | ||
| if IsMultusAdmissionControllerIgnoredNamespace(&ns) { |
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(IsMultusAdmissionControllerIgnoredNamespace also checks for ns.Labels["openshift.io/cluster-monitoring"] == "true", but that has no additional effect here because nsList already has only the namespaces with that label. 👍 )
| namespaces = append(namespaces, ns.Name) | ||
| } | ||
| } | ||
| sort.Strings(namespaces) |
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What is this for?
If it's just for unit test comparisons it would be better to make the unit tests comparisons non-order-dependent.
| if err != nil { | ||
| klog.Warningf("failed to get openshift namespaces: %+v", err) | ||
| } | ||
| ignoredNamespaces, err := getOpenshiftNamespaces(client) |
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you should make this a local variable now
| func TestRenderMultusAdmissionControllerRefreshesIgnoredNamespaces(t *testing.T) { | ||
| g := NewGomegaWithT(t) | ||
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| fakeClient := cnofake.NewFakeClient() | ||
| bootstrap := fakeBootstrapResult() | ||
| hsc := hypershift.NewHyperShiftConfig() | ||
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| objs, err := renderMultusAdmissonControllerConfig(manifestDir, false, bootstrap, fakeClient, hsc, "", getDefaultFeatureGates()) | ||
| g.Expect(err).NotTo(HaveOccurred(), "failed to render the initial Multus admission controller configuration") | ||
| g.Expect(findMultusWebhookExec(t, objs)).NotTo(ContainSubstring("test-namespace"), "initial configuration should not contain the test namespace") | ||
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| _, err = fakeClient.Default().Kubernetes().CoreV1().Namespaces().Create( | ||
| t.Context(), | ||
| &corev1.Namespace{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: "test-namespace", | ||
| Labels: map[string]string{ | ||
| "openshift.io/cluster-monitoring": "true", | ||
| }, | ||
| Annotations: map[string]string{ | ||
| "workload.openshift.io/allowed": "management", | ||
| }, | ||
| }, | ||
| }, | ||
| metav1.CreateOptions{}, | ||
| ) | ||
| g.Expect(err).NotTo(HaveOccurred(), "failed to create the test namespace") | ||
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| objs, err = renderMultusAdmissonControllerConfig(manifestDir, false, bootstrap, fakeClient, hsc, "", getDefaultFeatureGates()) | ||
| g.Expect(err).NotTo(HaveOccurred(), "failed to render the refreshed Multus admission controller configuration") | ||
| g.Expect(findMultusWebhookExec(t, objs)).To(ContainSubstring("test-namespace"), "refreshed configuration should contain the test namespace") |
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Please start with one eligible namespace, render once, then add another and verify both; otherwise this test also passes against the pre-PR implementation and does not prove the fix.
4 participants
What does this PR do?
Adds event-driven reconciliation for namespace changes that affect the Multus admission controller ignore list.
The CNO now:
openshift.io/cluster-monitoring=trueandworkload.openshift.io/allowed=management.-ignore-namespacesargument without restarting CNO.Why?
ACM namespaces can be created after the network operator starts, particularly during IBU restore. Previously, the Multus ignore list could remain stale until the CNO was restarted.
How to verify it
Local validation passed on commit
b3533a946:go test ./pkg/network ./pkg/controller/operconfiggo vet ./...go build -buildvcs=false ./...git diff --checkAutomated CNO CI lanes cover unit, verify, verify-deps, lint, images, security, and upgrade/conformance testing. On the current commit, the following jobs are running and currently pending:
ci/prow/5.1-upgrade-from-stable-5.0-e2e-aws-ovn-upgrade— AWS.ci/prow/5.1-upgrade-from-stable-5.0-e2e-azure-ovn-upgrade— Azure.ci/prow/e2e-aws-ovn-fdp-qe,ci/prow/e2e-aws-ovn-hypershift-conformance,ci/prow/e2e-aws-ovn-serial-1of2,ci/prow/e2e-aws-ovn-serial-2of2,ci/prow/e2e-aws-ovn-upgrade, andci/prow/e2e-aws-ovn-windows— AWS.No dedicated
test/e2etest was added. This is a focused controller/rendering bug fix: unit tests directly verify the Namespace predicate and refreshed Multus ignore list. A dedicated E2E test would require provisioning an ACM-managed Namespace with internal platform labels and annotations and would not provide better coverage of the event predicate than these tests. Existing CNO upgrade and conformance lanes provide cluster-level regression coverage.Upgrade and rollback
This change has no API, storage, schema, or upgrade-hook changes. Existing periodic reconciliation remains as a fallback during upgrades. Rollback is safe by reverting this commit; no persistent data or migration cleanup is required.
Jira
https://redhat.atlassian.net/browse/OCPBUGS-123509
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