CodePipelines migrate from existing application

[bobveringa]

I am currently working on an existing CDK application that does not use Code Pipelines. Because the application now needs to be deployed in multiple regions and across multiple accounts, Code Pipelines look like an ideal solution.

However, code pipelines seem to require stages, the application currently does not use this and only uses the App as scope.

Example:

app = App()

# Set the environment
env = Environment(
    account='123456789',
    region='eu-central-1',
)

monitoring = MonitoringStack(app, 'monitoring', env=env)

Moving to Stages changes the scope of the stacks and causes a redeployment of stateful resources, like the RDS database instance, Cognito User pools and DNS records. Some of these resources can be imported to other stacks (this seems like a very manual process), but cognito user pools are not supported¹.

The names of the stacks also seem to change when they are added to a stage (this makes sense), but forcing the name to be the same as the current stack E.G. currently it is monitoring in the stage it is app-prod-euc1-monitoring, forcing this generated name to monitoring still redeploys resources (I am guessing the scope is different).

Is there any way to move these resources between stacks, or better yet, a way to migrate the entire application to Stages without a redeployment?

[1] https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/resource-import-supported-resources.html