Has anyone seen the error ` prefect engine is a package and

Question

Has anyone seen the error ` prefect engine is a package and cannot be directly executed` when trying to run a DockerContainer flow in Prefect 2 0

Seth Coussens · Answer

Here are the log entries ```20 46 10 664 | INFO | prefect agent Completed submission of flow run f489116c 3ab8 45e9 9b0e 5b472bd94b2b 20 46 10 676 | INFO | prefect infrastructure docker container Docker container beige basilisk has status running usr local bin python No module named prefect engine main prefect engine is a package and cannot be directly executed 20 46 11 612 | INFO | prefect infrastructure docker container Docker container beige basilisk has status exited ```

Seth Coussens · Answer

Very simple flow too ```from prefect import flow get run logger flow def my docker flow logger = get run logger <http logger info|logger info> Hello from Docker if name == main my docker flow ```

Anna Geller · Answer

looks like you have overwritten the default entrypoint can you try with a simpler Dockerfile at first sth like this ```FROM prefecthq prefect 2 python3 9 COPY requirements txt RUN pip install r requirements txt```

Seth Coussens · Answer

Let me comment out the CMD in the dockerfile and see if that helps

Seth Coussens · Answer

We do set the WORKDIR root workspace in the dockerfile

Anna Geller · Answer

you can if you want to default is opt prefect

Seth Coussens · Answer

What s the default entry point

Anna Geller · Answer

you shouldn t have to worry about it

Seth Coussens · Answer

We need an ubuntu base image for some of our more complex flows using prefect 1 0 currently so we have to build the custom image and install prefect in it

Anna Geller · Answer

default entrypoint is something like prefect engine starts your flow run

Anna Geller · Answer

how about multi stage build then you can then still leverage Prefect image

Seth Coussens · Answer

I m open to that just not sure how to layer that properly

Anna Geller · Answer

ok I checked if you want to build a custom image the default entrypoint is ```CMD python m prefect engine ```

Seth Coussens · Answer

ok let me try that

Anna Geller · Answer

or ```ENTRYPOINT python m prefect engine ```

Seth Coussens · Answer

I do see that in the deployment yaml the command property is already set to that and that is what is generating the error on flow run

Anna Geller · Answer

yup true ``` command python m prefect engine```

Anna Geller · Answer

not sure what s your image is but Prefect is based on Python and Python is based on Linux so chances are you can accomplish the same what you did on ubuntu with the Prefect image

Seth Coussens · Answer

Correct Let me try the base image and see if I get a different result

Seth Coussens · Answer

Thanks for your help I figured it out I also got the RemoteFiles working with Azure We had some custom packages that were being installed and they relied on prefect 1 0 so they were overwriting the default package I ll make note of that going forward