Goal

To streamline and organize the actions taken by the migration controller when prompted to force migrations to completion.

This restructuring was necessary to introduce a new "Paused" migration mode. 

It introduces the AllowWorkloadDisruption option, which dictates the controller's behavior when migrations exceed the AcceptableCompletionTime threshold. By activating this option, the migration controller can switch to post-copy mode or pause the Virtual Machine Instance, facilitating migration completion.

PersonalizeUser Stories

• As a cluster administrator, I want greater control over workload disruption during migrations, so that I can align migration behavior with workload-specific requirements or scenarios like upgrades or node drains.
• As a cluster administrator, I want to enforce migration completion by pausing workloads or enabling post-copy mode, so that migrations complete within an acceptable time frame.

Non-Requirements

Notes

• This introduces a new "Paused" migration mode, which provides an alternative to post-copy. This is mainly useful for cluster administrators when post-copy poses a risk to workloads but it's important for migrations to complete in a reasonable time frame.