Hi Cloud users, interested in your suggestions. I have a Flow that executes great on my local dev machine. However, some of the logic within the Flow leverages a different application (XVBF & Google Chrome) that's also installed on my local dev machine. When I attempt to serialize the Flow into a Docker image, it doesn't run because the required application(s) aren't installed in the Docker image the

.register

generates. I can get the dependent application(s) to run inside a Docker image with supervisord, but that would require the entrypoint of Docker to somehow trigger supervisord before it attempts to execute the Flow. I couldn't find an API in Prefect to allow for this type of functionality? Another option is to provide the dependent application(s) as a native cloud service, and communicate over the network to access the same way I do it on my local dev machine.. but that'd be overkill for this one Flow. Curious if anyone has been successful in wrapping another (non-Python) application inside a serialized Flow to deploy on Prefect Cloud.

Hi Scott, really interesting question; a few thoughts come to mind: - we originally created the

on_start

hook on the environment class for situations like this; it is a Python hook but you might be able to get away with calling a subprocess here - We could definitely explore adding some pre-execute non-python hooks to the CLI endpoint that agents call to support this type of use case

Thanks Chris, Jason helped me hack around the need to run supervisord, so my immediate use case has been hacked around.