Rundeck Rundeck Development

Hi,
We're using "canary releasing" and deploy our release only to few servers before deploying it to the entire pool.
The issue with Rundeck is that the list of nodes a job has to be run on is define within the job definition and cannot be externalize.

We could duplicate jobs and then configure a specific node list for each, but a dynamic node selection within a defined pool
(for example, for avoiding adding a production server if I configured this job to run on the test servers pool) would be more flexible (we don't have fixed nodes in our deployment strategy), and more maintenable (one deployment task = only one Rundeck job, applicable for all nodes). If I go further into the development of this idea, I think node selection (+ thread count) should be moved out of the job definition.
2 new classes could be added to Rundeck model: the nodes set and the runnable job. The runnable job would be composed of a job definition and a nodes set.

The nodes set would have a boolean / checkbox to define if the selected pool can be dynamically filtered by allowing the user to add exclusions just before running the job. For example, the page prompting for run options could also display the nodes "bubbles" and make them clickable (all selected by default).