Set minimum version of 4.20 required to upgrade to 4.21

[aksjadha]

Fixes: Related to fix #OCPBUGS-83862 to be applied before upgrading to 4.21

This change introduces a gate to block 4.20 clusters from upgrading to 4.21 until the prerequisite patch for Auto Node Sizing has been applied.

Requirement: The necessary 4.20 patch openshift/machine-config-operator#5885 introduces a specific MachineConfig to enforce this disabled state for master and worker mcp. This is fixed in 4.20.25.

Goal: This PR ensures upgrade safety by confirming the presence of that MachineConfig before proceeding to 4.21.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on this repository. Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

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

Review profile: CHILL

Plan: Enterprise

Run ID: 89ce9232-44cb-4748-9c03-a1ba58f95301

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[openshift-ci]

Hi @aksjadha. Thanks for your PR.

I'm waiting for a openshift member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Details

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.

[ngopalak-redhat]

/ok-to-test

[ngopalak-redhat]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: aksjadha, ngopalak-redhat
Once this PR has been reviewed and has the lgtm label, please assign pratikmahajan for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• build-suggestions/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci]

@aksjadha: all tests passed!

Full PR test history. Your PR dashboard.

Details

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. I understand the commands that are listed here.

[aksjadha]

/assign @wking

@wking can you please review and approve PR?