pipelines: Stages to support max concurrent steps

[x3dfxjunkie]

Describe the feature

When using stages with pipelines, there is currently no way to define desired concurrency (akin to cdk deploy --concurrency). Adding a new optional parameter to aws-cdk-lib » pipelines » Wave of concurrency would direct stage creation to use N number of max concurrent steps.

Use Case

Pipelines uses a large concurrency for stage creation. This causes issues when making larger number of changes to certain services, such as DMS. DMS starts erroring out when more than 8-10 of certain changes take place at the same time. Depending on the changes being implemented, this can cause rollback issues as well.

Proposed Solution

Add optional parameter to aws-cdk-lib » pipelines » Wave of concurrency. This would then alter how many steps are added to each stage.

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.118.0

Environment details (OS name and version, etc.)

Python 3.12, Linux/macos