prow: add registry-pull preset to provide jobs with pull credentials

[petr-muller]

Proof of concept for using Prow presets to deduplicate boilerplate from the 126K+ generated ci-operator Prowjob definitions.

This PR adds a preset to the Prow config that provides the pull-secret volume and volumeMount to any Prowjob labeled with presets.ci.openshift.io: "true".

This is the first of several compositional, domain-specific presets — each covers one logical domain with its own label, and they compose independently.

Rollout

1. This PR merges first — adds the preset definition. No behavior change since no jobs have the label yet.
2. Rehearse a job with removed volumes and added preset usage label
3. A version of prowgen: use preset for registry pull credentials volume ci-tools#4994 limited to a single job merges; there are other Prowjob producers in ci-tools (prpqr and multi-pr) and I would like to test that everything works fine on selected jobs before merging the full thing that will force a gargantuan change in o/release that would be hard to revert.
4. Full prowgen: use preset for registry pull credentials volume ci-tools#4994 PR merges — prowgen starts adding the label and stops inlining the volume/mount.
5. make update run — regenerates all jobs, removing ~888K lines of boilerplate and adding the label.

🤖 Generated with Claude Code

[openshift-ci]

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

[petr-muller]

/test prow-config

[openshift-ci-robot]

[REHEARSALNOTIFIER]
@petr-muller: no rehearsable tests are affected by this change

Note: If this PR includes changes to step registry files (ci-operator/step-registry/) and you expected jobs to be found, try rebasing your PR onto the base branch. This helps pj-rehearse accurately detect changes when the base branch has moved forward.

Interacting with pj-rehearse

Comment: /pj-rehearse to run up to 5 rehearsals
Comment: /pj-rehearse skip to opt-out of rehearsals
Comment: /pj-rehearse {test-name}, with each test separated by a space, to run one or more specific rehearsals
Comment: /pj-rehearse more to run up to 10 rehearsals
Comment: /pj-rehearse max to run up to 25 rehearsals
Comment: /pj-rehearse auto-ack to run up to 5 rehearsals, and add the rehearsals-ack label on success
Comment: /pj-rehearse list to get an up-to-date list of affected jobs
Comment: /pj-rehearse abort to abort all active rehearsals
Comment: /pj-rehearse network-access-allowed to allow rehearsals of tests that have the restrict_network_access field set to false. This must be executed by an openshift org member who is not the PR author

Once you are satisfied with the results of the rehearsals, comment: /pj-rehearse ack to unblock merge. When the rehearsals-ack label is present on your PR, merge will no longer be blocked by rehearsals.
If you would like the rehearsals-ack label removed, comment: /pj-rehearse reject to re-block merging.

[openshift-ci]

@petr-muller: all tests passed!

Full PR test history. Your PR dashboard.

Details

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: petr-muller, Prucek

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Needs approval from an approver in each of these files:

• core-services/prow/02_config/OWNERS [Prucek]

Approvers can indicate their approval by writing /approve in a comment
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[openshift-ci]

@petr-muller: Updated the config configmap in namespace ci at cluster app.ci using the following files:

• key config.yaml using file core-services/prow/02_config/_config.yaml

Details

In response to this:

Proof of concept for using Prow presets to deduplicate boilerplate from the 126K+ generated ci-operator Prowjob definitions.

This PR adds a preset to the Prow config that provides the pull-secret volume and volumeMount to any Prowjob labeled with presets.ci.openshift.io: "true".

This is the first of several compositional, domain-specific presets — each covers one logical domain with its own label, and they compose independently.

Rollout

1. This PR merges first — adds the preset definition. No behavior change since no jobs have the label yet.
2. Rehearse a job with removed volumes and added preset usage label
3. A version of prowgen: use preset for registry pull credentials volume ci-tools#4994 limited to a single job merges; there are other Prowjob producers in ci-tools (prpqr and multi-pr) and I would like to test that everything works fine on selected jobs before merging the full thing that will force a gargantuan change in o/release that would be hard to revert.
4. Full prowgen: use preset for registry pull credentials volume ci-tools#4994 PR merges — prowgen starts adding the label and stops inlining the volume/mount.
5. make update run — regenerates all jobs, removing ~888K lines of boilerplate and adding the label.

🤖 Generated with Claude Code

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 kubernetes-sigs/prow repository.