OCPBUGS-87957: Declare KubeStateMetricsTimezonePanic risk for 4.20.z

[shahsahil264]

Summary

Adds conditional update risk for all 4.20.z GA releases (4.20.0 through 4.20.30) to warn clusters upgrading from 4.19.z that kube-state-metrics may crash loop if CronJobs with .spec.timeZone are present.

Root cause: /usr/share/zoneinfo/ is missing from the kube-state-metrics container image. The statically-compiled Go binary panics when time.LoadLocation() fails for timezone-aware CronJobs.

• Affected: 4.20.z, 4.21.z, 4.22.z (confirmed by Benjamin Affolter and Simon Pasquier)
• Not affected: 4.19.z
• Blocked-edges for 4.20.z only: upgrading from 4.20→4.21 or 4.21→4.22 does not increase exposure (affected→affected)
• No fixedIn: fix PRs openshift/kube-state-metrics#147 and #150 still open
• type: Always: no PromQL metric for CronJob timezone usage

Bug

• https://redhat.atlassian.net/browse/OCPBUGS-87957
• Impact statement: https://redhat.atlassian.net/browse/MON-4619

Test plan

• ./hack/validate-blocked-edges.py passes

[openshift-ci-robot]

@shahsahil264: This pull request references Jira Issue OCPBUGS-87957, which is invalid:

• expected the bug to target either version "5.0." or "openshift-5.0.", but it targets "4.22.z" instead

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

Details

In response to this:

Summary

Adds conditional update risk for all 4.20.z GA releases (4.20.0 through 4.20.30) to warn clusters upgrading from 4.19.z that kube-state-metrics may crash loop if CronJobs with .spec.timeZone are present.

Root cause: /usr/share/zoneinfo/ is missing from the kube-state-metrics container image. The statically-compiled Go binary panics when time.LoadLocation() fails for timezone-aware CronJobs.

• Affected: 4.20.z, 4.21.z, 4.22.z (confirmed by Benjamin Affolter and Simon Pasquier)
• Not affected: 4.19.z
• Blocked-edges for 4.20.z only: upgrading from 4.20→4.21 or 4.21→4.22 does not increase exposure (affected→affected)
• No fixedIn: fix PRs openshift/kube-state-metrics#147 and #150 still open
• type: Always: no PromQL metric for CronJob timezone usage

Bug

• https://redhat.atlassian.net/browse/OCPBUGS-87957
• Impact statement: https://redhat.atlassian.net/browse/MON-4619

Test plan

• ./hack/validate-blocked-edges.py passes

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[shahsahil264]

@wking Can you PTAL!

Thanks

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: shahsahil264
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[sdodson]

/hold

I don't want us to block all updates to 4.20 until such a time that we fix this. Please look closer at 4.20.28 and 4.20.29, /usr/share/zoneinfo exists in the former but not the latter. Why?

[sdodson]

https://redhat.atlassian.net/browse/OCPBUGS-87957?focusedCommentId=17692434 has the appropriate affected version ranges.

[shahsahil264]

Updated, narrowed to 4.20.29-30, 4.21.24-25, 4.22.0-6 per your findings
Thanks!

[openshift-ci]

@shahsahil264: all tests passed!

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