Increase dal10 PowerVS quota slices from 1 to 4

[Neha-dot-Yadav]

This PR increases the dal10 PowerVS lease capacity from 1 to 4 quota slices to support more parallel CI jobs.

Summary

This PR increases the OpenShift CI infrastructure's PowerVS quota capacity in the DAL10 region from 1 to 4 parallel quota slices, enabling more concurrent CI jobs to run on the PowerVS platform.

Changes

Infrastructure Impact: The change enables the Prow CI system to provision up to 4 simultaneous PowerVS instances in the DAL10 region instead of the previous single instance. This directly increases parallelization capacity for CI jobs that require PowerVS infrastructure.

Modified Components:

1. Boskos resource pool configuration (_boskos.yaml): The powervs-3-quota-slice resource now defines 4 named quota slices (dal10-powervs-3-quota-slice-0 through -3) instead of a single dal10 entry, allowing the Prow scheduler to allocate up to 4 independent quota leases.

2. Boskos generator script (generate-boskos.py): Updated to programmatically generate the 4 quota-slice entries, ensuring consistency between the generated and source configurations.

3. PowerVS IPI deployment script (ipi-conf-powervs-commands.sh): Extended to recognize and properly route all 4 new DAL10 quota-slice identifiers to their respective PowerVS service instance credentials and regional settings (PowerVS region: dal, zone: dal10, VPC region: us-south).

This change maintains backward compatibility while expanding the infrastructure's capacity to run more parallel CI workflows in the PowerVS environment.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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

Review profile: CHILL

Plan: Enterprise

Run ID: 636fbb67-cfe3-4aec-9403-15ef64cd1838

📥 Commits

Reviewing files that changed from the base of the PR and between 88e6273 and 95cdb9c.

📒 Files selected for processing (3)

• ci-operator/step-registry/ipi/conf/powervs/ipi-conf-powervs-commands.sh
• core-services/prow/02_config/_boskos.yaml
• core-services/prow/02_config/generate-boskos.py

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Walkthrough

PowerVS deployment infrastructure is extended to support four DAL10 quota slice variants. The Boskos configuration now defines four slice-specific resources, the Python generator creates their names, and the deployment script handles their slice-specific prefixes and service instance mappings.

Changes

PowerVS DAL10 Quota Slices Extension

Layer / File(s)	Summary
Generator Logic core-services/prow/02_config/generate-boskos.py	Generator initializes powervs-3-quota-slice as empty and populates it with a loop creating four dal10-powervs-3-quota-slice-{0..3} entries.
Configuration Definition core-services/prow/02_config/_boskos.yaml	powervs-3-quota-slice resource names field replaces single dal10 with four slice-qualified names: dal10-powervs-3-quota-slice-0, -1, -2, -3.
Deployment Script Integration ci-operator/step-registry/ipi/conf/powervs/ipi-conf-powervs-commands.sh	Script adds handling for four new LEASED_RESOURCE slice values, deriving CLUSTER_NAME with slice-specific prefixes and mapping each to its corresponding POWERVS_SERVICE_INSTANCE_ID_DAL10-{slice} secret and region settings.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 12

✅ Passed checks (12 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Increase dal10 PowerVS quota slices from 1 to 4' accurately reflects the main change across all modified files: the PowerVS quota slice configuration is expanded from a single dal10 slice to four slice-qualified identifiers.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Stable And Deterministic Test Names	✅ Passed	PR contains no Ginkgo test definitions. Changes are infrastructure configuration only - PowerVS deployment script, YAML, and Boskos generator. Check not applicable.
Test Structure And Quality	✅ Passed	No Ginkgo test files present in this PR. Modifies shell scripts, YAML config, and Python scripts for PowerVS quota configuration. Check not applicable.
Microshift Test Compatibility	✅ Passed	No Ginkgo e2e tests were added. Changes are infrastructure/configuration only (shell, YAML, Python scripts for PowerVS quota slices). Check not applicable.
Single Node Openshift (Sno) Test Compatibility	✅ Passed	PR contains no new Ginkgo e2e tests. Changes are limited to CI infrastructure/configuration files (shell script, YAML, Python). SNO compatibility check is not applicable.
Topology-Aware Scheduling Compatibility	✅ Passed	No deployment manifests or scheduling constraints found. Changes are resource capacity management for PowerVS quota slices with no pod affinity, topology spread, or node selection constraints.
Ote Binary Stdout Contract	✅ Passed	Check not applicable: PR modifies only shell script, YAML config, and Python generator - no OTE binaries or Go test code present.
Ipv6 And Disconnected Network Test Compatibility	✅ Passed	This PR contains no Ginkgo e2e tests. Changes are to infrastructure files only: PowerVS deployment script, Boskos config YAML, and Python generator. The check applies only to new Ginkgo e2e tests.

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✨ Finishing Touches

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Neha-dot-Yadav
Once this PR has been reviewed and has the lgtm label, please assign tvardema, wking for approval. For more information see the Code Review Process.

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Details

Needs approval from an approver in each of these files:

• ci-operator/step-registry/ipi/conf/powervs/OWNERS
• core-services/prow/02_config/OWNERS

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[openshift-ci]

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[Neha-dot-Yadav]

/pj-rehearse periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-ovn-powervs-capi-multi-p-p

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