Background

OCPCLOUD-1243 introduced a proposal to backport the machine deletion hook feature from upstream.

We should now implement this feature as described in the proposal https://github.com/openshift/enhancements/pull/862 so that it can be leveraged by the etcd operator as part of the control plane scaling project

Steps

• Review the enhancement
• Implement the machine deletion hook feature
• Implement the conditions as described in the enhancement
• Implement appropriate testing for the feature

Stakeholders

• Cluster Infra
• etcd
• OSD

Definition of Done

• Machine Deletion Hook feature is implemented as described in the enhancement proposal

• Docs

• N/A - For now we do not want to document this feature for public use. It will be considered an internal API for use explicitly in openshift

• Testing

• Ensure hooks appropriately block lifecycle phases