🐛 Enhance OpenStackMachine controller to handle cases where ControlPlane is not managed by CAPO (user provided ports, SGs etc)

[bnallapeta]

What this PR does / why we need it: Hosted Control Plane (HCP) clusters do not use a control-plane node in OpenStack, so CAPO should rely on user-specified ports and security groups rather than cluster defaults.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #2380

Special notes for your reviewer:

• Skip openStackCluster.Status.Network when .spec.ports are defined.
• If .spec.securityGroups is non-empty, ignore the cluster’s default SG.
• Maintain CAPO’s convention of attaching SGs at the port level, with updated unit tests verifying HPC usage.

Avoids nil-pointer panics for HPC setups and lets users fully customize network and security groups for worker nodes.

TODOs:

• [X] squashed commits
• if necessary:
  • [ ] includes documentation
  • [X] adds unit tests

/hold

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[mdbooth]

/ok-to-test

[k8s-ci-robot]

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

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-provider-openstack-e2e-test	1bf53711d42ef065496e890a8cb86b17a29a9456	link	true	/test pull-cluster-api-provider-openstack-e2e-test

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[lentzi90]

Regarding E2E for this, there is an example here where we create extra networks. The harder part would probably be the control plane. I could imagine a test where we create a "normal" cluster first, turn it into a management cluster and then set up a Kamaji + CAPO cluster from there. (Kamaji provides the control-plane just like HCP would.)

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/lifecycle stale

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/lifecycle rotten

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PR needs rebase.

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/close

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@k8s-triage-robot: Closed this PR.

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/close

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