Manual Docker Configuration
To use the "Manual Docker Configuration" option, you'll need to use
gradescope/autograder-base as the base image for your docker image.
You can also other operating systems such as
fedora, or different versions of
Ubuntu - see the complete list on DockerHub.
Note: You can now also use different base images with a zip file upload.
You'll need to ensure that your image contains the
run_autograder script at
/autograder/run_autograder. This should match the requirements
described on the specifications page. In particular, at the end of the
script, the results should be in
/autograder/results/results.json with the
Any setup can be done in the Dockerfile, so there is no need for a
script. You can use one if it's easier though.
Beyond this, there are no other requirements on the structure of your Docker image, so you can organize it as you wish.
If you're just getting started, you can look at our sample Dockerfile.
This example puts all the autograder source in a
source directory and uses a
setup.sh file similar to the zip file upload method, so it can be a good
transition path for going from a zip file to fully custom Docker builds.
You may also wish to refer to the Dockerfile reference docs.
Private Docker Hub Repositories
If your Docker Hub repository is private, you'll need to give the user
gradescopeecs access to your repository. You may want to do this to
make sure that students cannot download your autograder image.
Running autograder images locally
To run your autograder image locally, you will currently need to bypass our
autograder harness because otherwise it will try to communicate with Gradescope
by default. You can do this by mounting a sample submission into the
/autograder/submission directory and then running
directly. Here's an example command; replace the path to the submission, results
directory, and Docker image name with the appropriate values.
docker run --rm -v /path/to/submission:/autograder/submission -v /path/to/results:/autograder/results username/image_name:tag /autograder/run_autograder && cat /path/to/results/results.json
or to start an interactive session:
docker run --rm -it -v /path/to/submission:/autograder/submission -v /path/to/results:/autograder/results username/image_name:tag bash
--rmis added to clean up the container after it exits. You can remove it if you want to inspect container logs or state afterwards.
/autograder/resultsdirectory should be mounted to a path on your host so that you can inspect the results.json file that your autograder produces.