Summary (PM+lead)

Kubernetes 1.22 will remove old beta APIs. They will not be served anymore and we have to migrate platform component BEFORE the 1.22 rebase can land.

A list of to be removed APIs (compare https://kubernetes.io/docs/reference/using-api/deprecation-guide/):

storage.k8s.io/v1beta1

• CSIDriver
• CSINode
• StorageClass
• VolumeAttachment

scheduling.k8s.io/v1beta1

• PriorrityClass

rbac.authorization.k8s.io/v1beta1

• all RBAC resources

networking.k8s.io/v1beta1

• IngressClass
• Ingress

extensions/v1beta1

• Ingress

coordination.k8s.io/v1beta1

• Lease

certificates.k8s.io/v1beta1

• CertificateSigningRequest

authorization.k8s.io/v1beta1

• SubjectAccessReview

authentication.k8s.io/v1beta1

• TokenReview

apiregistration.k8s.io/v1beta1

• APIService

apiextensions.k8s.io/v1beta1

• CustomResourceDefinition

admissionregistration.k8s.io/v1beta1

• Mutating/VqlidatingAdmissionWebhook 

Motivation (PM+lead)

Without this work, the 1.22 rebase is blocked. There is no way to reenable the those APIs as they are removed from Kubernetes upstream.

Goals (lead)

1. support the platform to move off the removed APIs before rebase lands

Non-Goals (lead)

1. do all the work of porting to new APIs

Deliverables

1. general support of other teams

Dependencies (internal and external, lead)

• many other teams using deprecated APIs

Previous Work (lead)

• every component since Kubernetes 1.19 actively warns on deprecated API access: https://kubernetes.io/blog/2020/09/03/warnings/ 
• migration guide https://kubernetes.io/docs/reference/using-api/deprecation-guide/ 
• constant warnings in release notes and upstream blog
• API-999: API-Compatibility: automatically generate OpenShift API compatibility level list

Open questions (lead)

1. ...

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>