Epic Goal

• Make sure that some resources (statefulsets, especially those whose Pods take time to restart, for example Prometheus) are not unintentionally recreated to avoid downtime.

Why is this important?

• Avoid downtime.
• Avoid cases where Kubernetes cannot handle correctly the recreation of the resource. => All the resource's pods are stuck e.g.
• prometheus-operator uses foreground deletion when an immutable field of a statefulset e.g. is modified, see https://issues.redhat.com/browse/OCPBUGS-17346 where matchLabels was modified.

Scenarios

Acceptance Criteria

• We have a test (origin?) that makes sure of this during upgrades.
• It should be easy to temporarily disable the test in case we cannot avoid a recreation during an upgrade.

Dependencies (internal and external)

1. ...

Previous Work (Optional):

1. …

Open questions::

1. I thought about adding an origin test during upgrades, we had a discussion with Simon on https://issues.redhat.com/browse/OCPBUGS-17346?focusedId=22743037&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-22743037 (about the maintainability of such tests)

Done Checklist

• CI - CI is running, tests are automated and merged.
• Release Enablement <link to Feature Enablement Presentation>
• DEV - Upstream code and tests merged: <link to meaningful PR or GitHub Issue>
• DEV - Upstream documentation merged: <link to meaningful PR or GitHub Issue>
• DEV - Downstream build attached to advisory: <link to errata>
• QE - Test plans in Polarion: <link or reference to Polarion>
• QE - Automated tests merged: <link or reference to automated tests>
• DOC - Downstream documentation merged: <link to meaningful PR>