SnapFaas Grading Functions for COS316

Directory structure

For each "function" FUNC_NAME there are three important important artifacts:

1. functions/FUNC_NAME/ is a subdirectory containing the function code, mounted as /srv/ when the function is running.
2. payloads/FUNC_NAME.jsonl is a JSON-line formatted file where each line is a JSON encoded request payload to the function, useful for testing.
3. output/FUNC_NAME.img a "compiled" filesystem image from the function source automatically generated.

The storage sub-directory is used to store LMDB data from test runs.

Test functions

To run a function using the requests in its respective payload file, use the Makefile in the root directory:

$ make run/FUNC_NAME

This will build the function image and run it using fc_wrapper, passing in each of the requests from the payload one after the other. It stores the output of in run/FUNC_NAME.

Objects

• cos316/assignments - JSON object mapping assignment names to starter code repo and other metadata. Ex:

  { "assignment0": { "starter_code": "cos316/assignment0-starter-code" } }

• github/[owner]/[repo]/_meta - JSON object with assignment and list of student NetIDs Ex: github/cos316/assignment0-foobar/_meta

  { "assignment": "assignment0", "users": [ "aalevy", "kap" ] }

• github/[owner]/[repo]/_workflow - JSON array with workflow functions Ex: github/cos316/assignment0-foobar/_workflow

  [ "go_grader", "grades", "generate_report", "post_comment" ]

• cos316/[assignment]/grading_script - tarball of the grading script

• cos316/[assignment]/grader_config - JSON configuration from grading script