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Downsize GCP ARM Compute Instances#79564

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patrickdillon:reduce-arm-compute-size
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Downsize GCP ARM Compute Instances#79564
patrickdillon wants to merge 1 commit into
openshift:mainfrom
patrickdillon:reduce-arm-compute-size

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@patrickdillon
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@patrickdillon patrickdillon commented May 20, 2026

We're hitting capacity exhaustion issues (GCP does not have enough ARM machines for us) causing nightlies to fail. This drops compute nodes to the minimum requirement size, which is a much more readily available instance size.

The 4.20 nightly is already using this type:

We're hitting capacity exhaustion issues (GCP does not have enough
ARM machines for us) causing nightlies to fail. This drops compute
nodes to the minimum requirement size, which is a much more readily
available instance size.
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openshift-ci Bot commented May 20, 2026

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: patrickdillon
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coderabbitai Bot commented May 20, 2026

Walkthrough

This PR downsizes GCP compute resources across OpenShift multiarch nightly CI configurations by uniformly changing machine types from t2a-standard-4 to t2a-standard-2 in upgrade and nightly test pipelines for release branches 4.20 through 5.0.

Changes

GCP Machine Type Downsizing

Layer / File(s) Summary
Nightly 4.20 upgrade configurations
ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.20-upgrade-from-nightly-4.19.yaml, openshift-multiarch-main__nightly-4.20-upgrade-from-stable-4.19.yaml
COMPUTE_NODE_TYPE updated from t2a-standard-4 to t2a-standard-2 in two upgrade test configurations.
Nightly 4.21 configurations
ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.21-upgrade-from-nightly-4.20.yaml, openshift-multiarch-main__nightly-4.21-upgrade-from-stable-4.20.yaml, openshift-multiarch-main__nightly-4.21.yaml
Machine type values updated in two upgrade configurations and one main nightly configuration; includes COMPUTE_NODE_TYPE and MIGRATION_INFRA_MACHINE_TYPE changes from t2a-standard-4 to t2a-standard-2.
Nightly 4.22 configurations
ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.22-upgrade-from-nightly-4.21.yaml, openshift-multiarch-main__nightly-4.22-upgrade-from-stable-4.21.yaml, openshift-multiarch-main__nightly-4.22.yaml
Machine type downsizing across upgrade and nightly configs affecting COMPUTE_NODE_TYPE, ADDITIONAL_WORKER_VM_TYPE, and MIGRATION_INFRA_MACHINE_TYPE in multiple test jobs from t2a-standard-4 to t2a-standard-2.
Nightly 4.23 configurations
ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.23-upgrade-from-nightly-4.22.yaml, openshift-multiarch-main__nightly-4.23-upgrade-from-stable-4.22.yaml, openshift-multiarch-main__nightly-4.23.yaml
Machine type updates across upgrade and nightly configurations for multiple GCP multiarch test jobs, changing COMPUTE_NODE_TYPE and MIGRATION_INFRA_MACHINE_TYPE from t2a-standard-4 to t2a-standard-2.
Nightly 5.0 configurations
ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-5.0-upgrade-from-nightly-4.22.yaml, openshift-multiarch-main__nightly-5.0-upgrade-from-stable-4.22.yaml, openshift-multiarch-main__nightly-5.0.yaml
Machine type reductions across upgrade and nightly test configurations affecting COMPUTE_NODE_TYPE, ADDITIONAL_WORKER_VM_TYPE, and MIGRATION_INFRA_MACHINE_TYPE across multiple GCP test jobs from t2a-standard-4 to t2a-standard-2.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested labels

lgtm, approved, rehearsals-ack

Suggested reviewers

  • memodi
  • asood-rh
🚥 Pre-merge checks | ✅ 5 | ❌ 7

❌ Failed checks (7 inconclusive)

Check name Status Explanation Resolution
Stable And Deterministic Test Names ❓ Inconclusive Repository clone failed, so this custom check could not run with code access. Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Test Structure And Quality ❓ Inconclusive Repository clone failed, so this custom check could not run with code access. Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Microshift Test Compatibility ❓ Inconclusive Repository clone failed, so this custom check could not run with code access. Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Single Node Openshift (Sno) Test Compatibility ❓ Inconclusive Repository clone failed, so this custom check could not run with code access. Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Topology-Aware Scheduling Compatibility ❓ Inconclusive Repository clone failed, so this custom check could not run with code access. Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Ote Binary Stdout Contract ❓ Inconclusive Repository clone failed, so this custom check could not run with code access. Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Ipv6 And Disconnected Network Test Compatibility ❓ Inconclusive Repository clone failed, so this custom check could not run with code access. Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
✅ Passed checks (5 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly and concisely summarizes the main change: downsizing GCP ARM compute instances from t2a-standard-4 to t2a-standard-2 across multiple configuration files.
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.
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@openshift-ci openshift-ci Bot requested review from chidanandbh and mjturek May 20, 2026 19:24
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[REHEARSALNOTIFIER]
@patrickdillon: the pj-rehearse plugin accommodates running rehearsal tests for the changes in this PR. Expand 'Interacting with pj-rehearse' for usage details. The following rehearsable tests have been affected by this change:

Test name Repo Type Reason
periodic-ci-openshift-multiarch-main-nightly-4.23-upgrade-from-nightly-4.22-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.23-ocp-e2e-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.21-upgrade-from-nightly-4.20-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-upgrade-gcp-ovn-multi-x-ax N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-x-x-to-a-x N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-5.0-upgrade-from-stable-4.22-ocp-e2e-upgrade-gcp-ovn-multi-x-ax N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-gcp-ovn-multi-x-x-to-a-x N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.22-upgrade-from-stable-4.21-ocp-e2e-upgrade-gcp-ovn-multi-x-ax N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-5.0-upgrade-from-stable-4.22-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.22-upgrade-from-nightly-4.21-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.23-ocp-e2e-gcp-ovn-multi-x-x-to-a-x N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-x-ax N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.22-upgrade-from-stable-4.21-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.23-ocp-e2e-gcp-ovn-multi-a-a-to-x-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.22-upgrade-from-nightly-4.21-ocp-e2e-upgrade-gcp-ovn-multi-x-ax N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-gcp-ovn-multi-a-a-to-x-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.20-upgrade-from-stable-4.19-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.20-upgrade-from-nightly-4.19-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-5.0-upgrade-from-nightly-4.22-ocp-e2e-upgrade-gcp-ovn-multi-x-ax N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-5.0-upgrade-from-nightly-4.22-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.21-upgrade-from-stable-4.20-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed
periodic-ci-openshift-multiarch-main-nightly-4.23-ocp-e2e-upgrade-gcp-ovn-multi-a-a N/A periodic Ci-operator config changed

A total of 29 jobs have been affected by this change. The above listing is non-exhaustive and limited to 25 jobs.

A full list of affected jobs can be found here
Prior to this PR being merged, you will need to either run and acknowledge or opt to skip these rehearsals.

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.

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In
`@ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.20-upgrade-from-nightly-4.19.yaml`:
- Line 94: You changed the CI config value COMPUTE_NODE_TYPE in the
openshift-multiarch-main__nightly-4.20-upgrade-from-nightly-4.19.yaml but did
not regenerate downstream artifacts; run the repository's generation step (make
update) to produce updated files derived from ci-operator/config/**/*.yaml and
commit those generated artifacts alongside this change so downstream configs,
job definitions, and any generated manifests reflect the new COMPUTE_NODE_TYPE.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

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

Review profile: CHILL

Plan: Enterprise

Run ID: 2c6d1418-874e-4679-ad34-3976c0fb79eb

📥 Commits

Reviewing files that changed from the base of the PR and between d4371cb and 7088b3a.

📒 Files selected for processing (14)
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.20-upgrade-from-nightly-4.19.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.20-upgrade-from-stable-4.19.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.21-upgrade-from-nightly-4.20.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.21-upgrade-from-stable-4.20.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.21.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.22-upgrade-from-nightly-4.21.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.22-upgrade-from-stable-4.21.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.22.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.23-upgrade-from-nightly-4.22.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.23-upgrade-from-stable-4.22.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-4.23.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-5.0-upgrade-from-nightly-4.22.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-5.0-upgrade-from-stable-4.22.yaml
  • ci-operator/config/openshift/multiarch/openshift-multiarch-main__nightly-5.0.yaml

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tthvo commented May 20, 2026

/pj-rehearse

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@tthvo: now processing your pj-rehearse request. Please allow up to 10 minutes for jobs to trigger or cancel.

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tthvo commented May 20, 2026

/pj-rehearse more

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@tthvo: now processing your pj-rehearse request. Please allow up to 10 minutes for jobs to trigger or cancel.

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openshift-ci Bot commented May 21, 2026

@patrickdillon: 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/rehearse/periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-a-a-to-x-a 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-a-a-to-x-a
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-gcp-ovn-multi-x-x-to-a-x 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-gcp-ovn-multi-x-x-to-a-x
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-4.21-upgrade-from-stable-4.20-ocp-e2e-upgrade-gcp-ovn-multi-a-a 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-4.21-upgrade-from-stable-4.20-ocp-e2e-upgrade-gcp-ovn-multi-a-a
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-4.21-upgrade-from-nightly-4.20-ocp-e2e-upgrade-gcp-ovn-multi-a-a 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-4.21-upgrade-from-nightly-4.20-ocp-e2e-upgrade-gcp-ovn-multi-a-a
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-4.21-ocp-e2e-gcp-ovn-multi-x-x-to-a-x 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-4.21-ocp-e2e-gcp-ovn-multi-x-x-to-a-x
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-4.23-upgrade-from-nightly-4.22-ocp-e2e-upgrade-gcp-ovn-multi-a-a 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-4.23-upgrade-from-nightly-4.22-ocp-e2e-upgrade-gcp-ovn-multi-a-a
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-5.0-upgrade-from-nightly-4.22-ocp-e2e-upgrade-gcp-ovn-multi-a-a 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-5.0-upgrade-from-nightly-4.22-ocp-e2e-upgrade-gcp-ovn-multi-a-a
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-x-ax 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-x-ax
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-a-a 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-5.0-ocp-e2e-gcp-ovn-multi-a-a
ci/rehearse/periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-gcp-ovn-multi-a-a-to-x-a 7088b3a link unknown /pj-rehearse periodic-ci-openshift-multiarch-main-nightly-4.22-ocp-e2e-gcp-ovn-multi-a-a-to-x-a

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