Feature Overview (aka. Goal Summary)  

Allow Arm architecture nodes to be added to an existing Azure OpenShift x86 architecture cluster as a day 2 operation.

Why is this important?
Arm architecture based systems have been heavily adopted by multiple cloud providers (including AWS) and we need to provide support for those platforms
It is not always possible to have all the applications in a cluster available on Arm so it is necessary to be able to have a mixed architecture cluster

Goals (aka. expected user outcomes)

Add an Azure Arm instance to a running OpenShift on Azure cluster (day 2 operation)

Requirements (aka. Acceptance Criteria):

A list of specific needs or objectives that a feature must deliver in order to be considered complete.  Be sure to include nonfunctional requirements such as security, reliability, performance, maintainability, scalability, usability, etc.  Initial completion during Refinement status.

Use Cases (Optional):

Include use case diagrams, main success scenarios, alternative flow scenarios.  Initial completion during Refinement status.

Questions to Answer (Optional):

Include a list of refinement / architectural questions that may need to be answered before coding can begin.  Initial completion during Refinement status.

Out of Scope

Day 1 (installation) of mixed architecture clusters)
Conversion of mixed architecture clusters to single architecture clusters

Background

Provide any additional context is needed to frame the feature.  Initial completion during Refinement status.

Customer Considerations

Provide any additional customer-specific considerations that must be made when designing and delivering the Feature.  Initial completion during Refinement status.

Documentation Considerations

Provide information that needs to be considered and planned so that documentation will meet customer needs.  Initial completion during Refinement status.

Interoperability Considerations

Which other projects and versions in our portfolio does this feature impact?  What interoperability test scenarios should be factored by the layered products?  Initial completion during Refinement status.