kube-green operator newer than 0.5.2 not available on Openshift 4.18

[vladenciu]

The latest kube-green operator version available for install in OperatorHub on Openshift 4.18 is 0.5.2 despite having 0.7.1 available on Openshift 4.17
I see since version 0.6.0 there is a new Openshift annotation in operators/kube-green/0.6.0/metadata/annotations.yaml: com.redhat.openshift.versions: 4.10-4.17

Is there some reason why newer versions of kube-green are not available on Openshift 4.18 ?

[BorekZnovustvoritel]

Hello, thanks for reaching out.

The release plan is driven by the community members, each author has the right not to release their operator to any version of OCP. So we should also invite the author of the operator to the discussion and let them decide. @davidebianchi

However I did a small amount of digging why this annotation was introduced and it seems like it was used just to satisfy the static checks related to the pipeline when migrating to the more-modern operator-pipelines. One of the checks ensures that the directive replaces is not used when an older operator version (the one to be replaced) does not support less OCP versions than the newer version of the operator.

To actually fix this issue, a different directive should be used, otherwise an invalid catalog is generated (the new operator version then references something that does not exist in some of the catalogs). So using skiprange instead should help while supporting even newer versions of OCP. Changing the update graph retrospectively in the framework is problematic though.

The best way to address issues in update graph is migrating to File-Based Catalog (FBC), with FBC these changes are much simpler, every file just has to be present in a correct directory.

[vladenciu]

Hello,

Thank you for the extra information.
I hope in the end there are no incompatibilities and the annotation just needs to be updated to include the newer OCP versions

[davidebianchi]

Hello! Yes, I confirm that kube-green works also in the last OCP and K8s versions.
I will check into FBC so, and will update in the next weeks. Thanks for pointing that out!