OCPBUGS-82584: Add labelSelector to MachineSet status for scale subresource

[RadekManak]

Summary

MachineSet already advertises a scale subresource with labelSelectorPath: .status.labelSelector, but the API/schema does not define that status field.

• adds status.labelSelector to machine.openshift.io/v1beta1 MachineSetStatus

The paired openshift/machine-api-operator#1490 change populates status.labelSelector from spec.selector during MachineSet status reconciliation so the /scale subresource can expose Scale.status.selector for HPA/KEDA-style consumers.

[openshift-merge-bot]

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[openshift-ci-robot]

@RadekManak: This pull request references Jira Issue OCPBUGS-82584, which is invalid:

• expected the bug to target the "5.0.0" version, but no target version was set

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

Details

In response to this:

Summary

MachineSet already advertises a scale subresource with labelSelectorPath: .status.labelSelector, but the API/schema does not define that status field.

• adds status.labelSelector to machine.openshift.io/v1beta1 MachineSetStatus

The paired openshift/machine-api-operator#1490 change populates status.labelSelector from spec.selector during MachineSet status reconciliation so the /scale subresource can expose Scale.status.selector for HPA/KEDA-style consumers.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-ci]

Hello @RadekManak! Some important instructions when contributing to openshift/api:
API design plays an important part in the user experience of OpenShift and as such API PRs are subject to a high level of scrutiny to ensure they follow our best practices. If you haven't already done so, please review the OpenShift API Conventions and ensure that your proposed changes are compliant. Following these conventions will help expedite the api review process for your PR.

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⚙️ Run configuration

Configuration used: Repository YAML (base), Central YAML (inherited)

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Run ID: 8250aa19-6234-44c5-b05c-a1e2188388b7

📥 Commits

Reviewing files that changed from the base of the PR and between 6cb9185 and 75901b6.

⛔ Files ignored due to path filters (10)

• machine/v1beta1/zz_generated.crd-manifests/0000_10_machine-api_01_machinesets-CustomNoUpgrade.crd.yaml is excluded by !**/zz_generated.crd-manifests/*
• machine/v1beta1/zz_generated.crd-manifests/0000_10_machine-api_01_machinesets-Default.crd.yaml is excluded by !**/zz_generated.crd-manifests/*
• machine/v1beta1/zz_generated.crd-manifests/0000_10_machine-api_01_machinesets-DevPreviewNoUpgrade.crd.yaml is excluded by !**/zz_generated.crd-manifests/*
• machine/v1beta1/zz_generated.crd-manifests/0000_10_machine-api_01_machinesets-OKD.crd.yaml is excluded by !**/zz_generated.crd-manifests/*
• machine/v1beta1/zz_generated.crd-manifests/0000_10_machine-api_01_machinesets-TechPreviewNoUpgrade.crd.yaml is excluded by !**/zz_generated.crd-manifests/*
• machine/v1beta1/zz_generated.featuregated-crd-manifests/machinesets.machine.openshift.io/AAA_ungated.yaml is excluded by !**/zz_generated.featuregated-crd-manifests/**
• machine/v1beta1/zz_generated.featuregated-crd-manifests/machinesets.machine.openshift.io/MachineAPIMigration.yaml is excluded by !**/zz_generated.featuregated-crd-manifests/**
• machine/v1beta1/zz_generated.swagger_doc_generated.go is excluded by !**/zz_generated*
• openapi/generated_openapi/zz_generated.openapi.go is excluded by !openapi/**, !**/zz_generated*
• openapi/openapi.json is excluded by !openapi/**

📒 Files selected for processing (1)

• machine/v1beta1/types_machineset.go

🚧 Files skipped from review as they are similar to previous changes (1)

• machine/v1beta1/types_machineset.go

---

📝 Walkthrough

Walkthrough

An optional LabelSelector field (type string) was added to MachineSetStatus in machine/v1beta1/types_machineset.go (JSON: labelSelector,omitempty, validation: MinLength=0, MaxLength=4096). It represents the serialized label selector for the MachineSet's machines and is exposed via the scale subresource as status.selector. The field remains unset until the controller reconciles spec.selector into status.labelSelector. No other spec or status fields or control-flow logic were changed.

🚥 Pre-merge checks | ✅ 9 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Test Structure And Quality	❓ Inconclusive	PR appears to contain only schema field additions to MachineSetStatus type with no Ginkgo test code modifications identified.	Clarify if PR includes any Ginkgo test code changes requiring custom check review for test quality standards.

✅ Passed checks (9 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: adding a labelSelector field to MachineSet status for the scale subresource, matching the changeset.
Description check	✅ Passed	The description is directly related to the changeset, explaining why the labelSelector field is being added to MachineSetStatus and its purpose for the scale subresource.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Stable And Deterministic Test Names	✅ Passed	PR contains no Ginkgo test code, only static type definition field additions. No test names introduced or modified.
Microshift Test Compatibility	✅ Passed	This pull request is not applicable to the MicroShift Test Compatibility check because it does not add any new Ginkgo e2e tests. The change is purely an API schema modification that adds a LabelSelector field to the MachineSetStatus type in the machine API.
Single Node Openshift (Sno) Test Compatibility	✅ Passed	The custom check evaluates SNO compatibility for new Ginkgo e2e tests. This PR only adds an optional LabelSelector field to MachineSetStatus type with no new test code, making the check not applicable.
Topology-Aware Scheduling Compatibility	✅ Passed	PR adds only a LabelSelector field to MachineSetStatus struct with no scheduling constraints, pod affinity rules, or controller logic.
Ote Binary Stdout Contract	✅ Passed	This PR modifies only an API type definition file adding a field to MachineSetStatus struct. The OTE Binary Stdout Contract applies to test binaries and executable code, not pure type definitions.
Ipv6 And Disconnected Network Test Compatibility	✅ Passed	This PR adds a LabelSelector field to MachineSetStatus type, not Ginkgo e2e tests, so the check does not apply.

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🔧 golangci-lint (2.11.4)

Error: build linters: unable to load custom analyzer "kubeapilinter": tools/_output/bin/kube-api-linter.so, plugin: not implemented
The command is terminated due to an error: build linters: unable to load custom analyzer "kubeapilinter": tools/_output/bin/kube-api-linter.so, plugin: not implemented

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
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Details

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[RadekManak]

/jira refresh

[openshift-ci-robot]

@RadekManak: This pull request references Jira Issue OCPBUGS-82584, which is valid.

3 validation(s) were run on this bug

• bug is open, matching expected state (open)
• bug target version (5.0.0) matches configured target version for branch (5.0.0)
• bug is in the state POST, which is one of the valid states (NEW, ASSIGNED, POST)

Details

In response to this:

/jira refresh

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[everettraven]

Is there a reasonable upper bounds we can set here?

[RadekManak]

The labelSelector for MachineSet is typically the machineset name and cluster name. Additionally, user could add their own. There is no limit on how many they can add on the spec. Set this to 4096 as reasonable high number that won't cause issue to existing clusters.

[openshift-ci]

@RadekManak: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/lint	6cb9185	link	true	/test lint
ci/prow/verify-hypershift-integration	6cb9185	link	true	/test verify-hypershift-integration

Full PR test history. Your PR dashboard.

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