matplotlib Warning About Temporary Files in /tmp about jobeinabox HOT 2 OPEN

Are you using jobeinabox with CodeRunner or in some other context? If the latter, I'd be interested to know about it.

Creating a permanently writable directory for matplotlib is one workaround but would open a security hole (students could share info via that directory) and would need a housekeeping task to clean up the contents after each run.

Our standard workaround for this problem within CodeRunner is the following prefix code (after importing os):

    if 'MPLCONFIGDIR' not in os.environ or os.environ['MPLCONFIGDIR'].startswith('/home'):
        import tempfile
        os.environ['MPLCONFIGDIR'] = tempfile.mkdtemp()

Our template executes that code prior to an exec of the student answer. I possibly should consider moving this code into Jobe somehow. As you've discovered it's a bit tricky to configure environment variables on Jobe, as the runguard program I use to execute code cleans the environment before the run to plug various potential security holes.

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Hi Richard, we'll take a look at the fix you mentioned.

We have been testing jobeinabox with Coderunner on Moodle. Just some small customisations to get additional python modules into the container.

Thanks for the suggestion,
James

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