⚠ make spec.namespace optional in the experimental channel - #2929
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ChangesManaged namespace support
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant CatalogBundle
participant ClusterExtension
participant OperatorController
participant NamespaceAPI
CatalogBundle->>CatalogBundle: Add namespace-template annotation
ClusterExtension->>OperatorController: Submit without spec.namespace
OperatorController->>NamespaceAPI: Create managed namespace with PSA labels
NamespaceAPI-->>OperatorController: Return namespace state
OperatorController-->>ClusterExtension: Complete rollout
Merge Risk: ⚪ Minimal · up to This change enables managed namespaces when no namespace is specified while preserving immutable namespace choice. The supplied validation and coverage indicate it is ready to merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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/cc @joelanford @perdasilva pr #3 |
On the experimental channel spec.namespace may now be omitted, in which case operator-controller resolves and creates a managed namespace from the bundle's metadata. Whether the field is set or omitted is locked at creation time: it cannot be added, removed, or changed afterwards. The standard channel keeps the existing required and immutable contract. Signed-off-by: Nader Ziada <nziada@redhat.com>
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| - The operator's own workloads (deployments, services, configmaps) | ||
| - The operator's RBAC resources (service accounts, roles, role bindings) | ||
| - CRDs and webhooks installed by the operator |
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CRDs are cluster-scoped, which aren't in the managed namespace.
I'd put "webhooks" in the workload category, unless we're talking about ValidatingWebhookConfiguration and MutatingWebhookConfiguration (in which case, those are cluster-scoped as well)
| ## Deletion behavior | ||
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| Deleting a ClusterExtension with a managed namespace **deletes the entire namespace and everything in it.** If you have created resources in the managed namespace that are not part of the operator, they will be lost. | ||
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| If you need the namespace to persist beyond the operator's lifecycle, use `spec.namespace` to point at an existing namespace you manage yourself. |
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We may also want to mention that it is possible for the bundle-derived namespace name to change. If that happens with a managed namespace, OLM will create the new namespace and install the new bundle version into it, and then delete the old namespace. So it is possible for the namespace to be deleted without the ClusterExtension being deleted. We should note that OLM considers this a breaking change, and would expect bundle authors to rev their major version number when changing the bundle-derived namespace.
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It may also be worth noting that this should not impact any workloads (outside of the namespace being deleted) since the CRD will not be deleted through this migration.
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updated the comments
| ## Consistency across bundle formats | ||
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| The `operatorframework.io/suggested-namespace-template` and `operatorframework.io/suggested-namespace` annotations are the canonical way to declare namespace preferences. Future bundle formats should use the same annotation keys to avoid divergence across the ecosystem. |
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I would drop this line. Other formats may already have fields for this, may specify namespaces directly as templated manifests, or may not even have the concept of a single "namespace".
I would actually call this a relic of registry+v1 and something we should avoid entirely when considering support for other formats.
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Inline comments:
In `@docs/draft/concepts/managed-namespaces.md`:
- Line 53: Update the managed-namespace contents list in managed-namespaces.md
to remove CRDs, since they are cluster-scoped; if webhooks are intended to
remain, describe their namespaced workloads or services explicitly instead of
referring to webhooks generically.
In `@Makefile`:
- Line 694: Update the API-reference generation substitutions before the generic
opcon directive removal to replace bare <opcon:experimental> markers with the
“Experimental channel:” label, while retaining the existing cleanup for other
opcon directives.
In `@test/e2e/features/namespace.feature`:
- Line 43: Update the user-provided namespace scenario in the namespace feature
to include the NSTemplate(privileged) fixture, ensuring the scenario exercises
controller behavior when template PSA labels could be applied to user-provided
namespaces.
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Makefileapi/v1/clusterextension_types.goapplyconfigurations/api/v1/clusterextension.goapplyconfigurations/api/v1/clusterextensionspec.godocs/api-reference/olmv1-api-reference.mddocs/draft/concepts/managed-namespaces.mddocs/draft/howto/namespace-configuration-for-authors.mdhack/tools/crd-generator/main.gohack/tools/crd-generator/main_test.gohack/tools/crd-generator/testdata/output/experimental/olm.operatorframework.io_clusterextensions.yamlhack/tools/crd-generator/testdata/output/standard/olm.operatorframework.io_clusterextensions.yamlhelm/olmv1/base/operator-controller/crd/experimental/olm.operatorframework.io_clusterextensions.yamlinternal/operator-controller/applier/boxcutter_test.gointernal/operator-controller/controllers/clusterextension_admission_test.gointernal/operator-controller/controllers/clusterextension_reconcile_steps.gomanifests/experimental-e2e.yamlmanifests/experimental.yamltest/e2e/features/namespace.featuretest/e2e/steps/steps.gotest/internal/catalog/bundle.go
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| // Managed namespace mode (spec.namespace empty) means this is a new-style extension | ||
| // that never had a Helm release, so there's nothing to migrate. | ||
| if ext.Spec.Namespace == "" { | ||
| return nil | ||
| } |
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The reason we can make this assumption is because:
- Old CRD disallows empty namespace
- New CRD disallows unsetting the namespace
This means that the only way to end up with a CE with an unset spec.namespace is for it to be created after the new CRD is applied.
Is that right?
I do still wonder if we should have fewer (no?) opinions about the transitions we allow here though. I haven't thought deeply enough about this question yet, but I think we should.
- Should we allow a user who was forced to specify a managed namespace to transition their existing CE to a managed namespace?
- Should we allow a user who was using a managed namespace to instead opt to start managing the namespace?
But I think we can discuss that question separate from this PR, as that would just be a further relaxation of the CRD schema.
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Yes, that assumption is correct for supported CRD transitions.
- The old CRD required spec.namespace, and its DNS-label rule rejected "".
- An existing extension therefore always has a non-empty namespace.
- The new experimental CRD’s spec-level CEL rule prevents changing presence, so an existing non-empty field cannot be removed.
- Therefore an object with omitted spec.namespace must have been created after the new CRD was installed; it cannot represent a legacy Helm-backed extension, so skipping
Helm→ClusterObjectSet migration is valid.
Warn that changing bundle namespace metadata during an upgrade can cause revision archival to delete the previous managed namespace and its contents. Document stable namespace metadata and explicit migration guidance. Signed-off-by: Nader Ziada <nziada@redhat.com>
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| // Keep the namespace resolved by bundle metadata stable across bundle upgrades. A change | ||
| // to that metadata can cause a later revision to use a different managed namespace. When | ||
| // the previous revision is archived, its namespace is deleted with all of its contents. | ||
| // |
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I wonder if we should include this here - this seems to be more author focused, maybe?
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agreed, removed it from here
Document namespace relocation behavior and bundle-author guidance, label experimental API-reference fields, and strengthen managed-namespace coverage. Signed-off-by: Nader Ziada <nziada@redhat.com>
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Description
Makes ClusterExtension.spec.namespace optional in the experimental API to support system-managed install namespaces.
When omitted, the controller uses the bundle’s system-managed namespace instead of requiring callers to provide one.
Changes
Testing
Depends on #2926 for the runtime handling of an omitted namespace.
Reviewer Checklist
Summary by CodeRabbit
New Features
ClusterExtension.spec.namespaceis now optional; omitted values can create a managed namespace from bundle metadata.Documentation
Bug Fixes