Support ControlPlaneMachineSets on GCP

Feature Overview (aka. Goal Summary)  

Goal: Control plane nodes in the cluster can be scaled up or down, lost and recovered, with no more importance or special procedure than that of a data plane node.

Problem: There is a lengthy special procedure to recover from a failed control plane node (or majority of nodes) and to add new control plane nodes.

Why is this important: Increased operational simplicity and scale flexibility of the cluster’s control plane deployment.

Goals (aka. expected user outcomes)

To enable full support for control plane machine sets on GCP

Requirements (aka. Acceptance Criteria):

• Generate CPMS for upgraded clusters
• Document support for upgraded clusters
• Ensure E2E testing for GCP clusters

Out of Scope

Any other cloud platforms

Background

Feature created from split of overarching Control Plane Machine Set feature into single release based effort

Customer Considerations

n/a

Documentation Considerations

Nothing outside documentation that shows the Azure platform is supported as part of Control Plane Machine Sets

Interoperability Considerations

n/a