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CORENET-6390: API changes and feature gate for OVN-Kubernetes no-overlay mode #2537

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CORENET-6390: API changes and feature gate for OVN-Kubernetes no-overlay mode #2537

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@ricky-rav ricky-rav commented Oct 17, 2025

Using this as draft for the related openshift enhancement: openshift/enhancements#1859

@openshift-ci openshift-ci bot added the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Oct 17, 2025
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openshift-ci bot commented Oct 17, 2025

Hello @ricky-rav! 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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openshift-ci bot commented Oct 17, 2025

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

@openshift-ci openshift-ci bot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Oct 17, 2025
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[APPROVALNOTIFIER] This PR is NOT APPROVED

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JoelSpeed commented Oct 22, 2025

@ricky-rav Is this ready for an initial round of API review?

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ricky-rav commented Oct 22, 2025 •
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@ricky-rav Is this ready for an initial round of API review?

No no, it was just a draft for myself to keep track of the API changes in an enhancement I'm writing. I think @pliurh is taking over the API part of the feature.

@openshift-ci openshift-ci bot added size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Nov 17, 2025
@ricky-rav ricky-rav changed the title [WIP] API for no-overlay mode in OVN-Kubernetes [WIP] API changes and feature gate for OVN-Kubernetes no-overlay mode Nov 17, 2025
@ricky-rav ricky-rav changed the title [WIP] API changes and feature gate for OVN-Kubernetes no-overlay mode CORENET-6390: API changes and feature gate for OVN-Kubernetes no-overlay mode Nov 17, 2025
@openshift-ci-robot openshift-ci-robot added the jira/valid-reference Indicates that this PR references a valid Jira ticket of any type. label Nov 17, 2025
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openshift-ci-robot commented Nov 17, 2025 •
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@ricky-rav: This pull request references CORENET-6390 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.21.0" version, but no target version was set.

In response to this:

Using this as draft for the related openshift enhancement: openshift/enhancements#1859

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.

@ricky-rav
Add API support and FeatureGate for OVN-Kubernetes no-overlay mode
905c086 
This commit introduces API changes to support OVN-Kubernetes no-overlay mode for the default network,
where the cluster default network operates without overlay encapsulation (Geneve).

API changes (operator.openshift.io/v1):
- Added defaultNetworkTransport field to OVNKubernetesConfig (NoOverlay or Geneve)
- Added defaultNetworkNoOverlayOptions with outboundSNAT and routing configuration
- Added bgpManagedConfig for BGP configuration when routing is managed
- All no-overlay fields are immutable after cluster creation

Added feature gate (TechPreviewNoUpgrade) for NoOverlayMode within the Networking/ovn-kubernetes component.

Ran these commands to update autogenerated source files:
$ hack/update-codegen-crds.sh
$ hack/update-swagger-docs.sh
$ hack/update-payload-featuregates.sh

Openshift enhancement for this feature: openshift/enhancements#1859

Signed-off-by: Riccardo Ravaioli <[email protected]>
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@ricky-rav @JoelSpeed @openshift-ci-robot