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A Django application to manage long running job submission, including starting the job, saving logs, and storing results.

Project description

Django Remote Submission

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A Django application to manage long running job submission, including starting the job, saving logs, and storing results.

Documentation

The full documentation is at https://django-remote-submission.readthedocs.org.

Quickstart

Install Django Remote Submission:

pip install django-remote-submission

Then use it in a project:

from django_remote_submission.models import Server, Job
from django_remote_submission.tasks import submit_job_to_server

server = Server.objects.get_or_create(
    title='My Server Title',
    hostname='example.com',
    port=22,
)[0]

python2_interpreter = Interpreter.objects.get_or_create(
    name = 'python2',
    path = '/usr/bin/python2.7 -u',
)[0]

python3_interpreter = Interpreter.objects.get_or_create(
    name = 'python3',
    path = '/usr/bin/python3.5 -u',
)[0]

server.interpreters.set([python2_interpreter,
                         python3_interpreter])

job = Job.objects.get_or_create(
    title='My Job Title',
    program='print("hello world")',
    remote_directory='/tmp/',
    remote_filename='test.py',
    owner=request.user,
    server=server,
    interpreter=python2_interpreter,
)[0]

modified_files = submit_job_to_server(
    job_pk=job.pk,
    password=request.POST.get('password'),
)

Features

  • Able to connect to any server via password-authenticated SSH.

  • Able to receive logs and write them to a database in realtime.

  • Able to return any modified files from the remote server.

Running Tests

Does the code actually work?

source <YOURVIRTUALENV>/bin/activate
(myenv) $ pip install -r requirements_test.txt
(myenv) $ make test

Some of the tests use a test server to check the functional aspects of the library. Specifically, it will try to connect to the server multiple times, run some programs, and check that their output is correct.

To run those tests as well, copy the .env.base file to .env and modify the variables as needed. If this file has not been set up, then those tests will be skipped, but it won’t affect the success or failure of the tests.

Running tests independtely, e.g.:

python runtests.py tests.test_tasks.SubmitJobTaskTest.test_normal_usage
python runtests.py tests.test_tasks.SubmitJobTaskTest
python runtests.py tests.test_tasks
python runtests.py tests.test_models

Running the Example

Launch Redis:

redis-server

Launch Celery:

cd example
celery -A server.celery worker --loglevel=info

Launch Django:

cd example
PYTHONPATH=../ ./manage.py makemigrations
PYTHONPATH=../ ./manage.py migrate
PYTHONPATH=../ ./manage.py loaddata fixtures/initial_data.json
PYTHONPATH=../ ./manage.py runserver

Open in the browser:

http://localhost:8000/admin/
http://localhost:8000/

Useful notes

When integrating this in django it might be usefull:

Add to settings:

CELERY_ACCEPT_CONTENT = ['pickle']
CELERY_EVENT_SERIALIZER = 'pickle'
CELERY_TASK_SERIALIZER = 'pickle'
CELERY_RESULT_SERIALIZER = 'pickle'

if using the app 'django_celery_results. Otherwise Result is not serialized.

The Results files are stored in MEDIA. So add to your setings something similar to:

MEDIA_URL = '/media/'
MEDIA_ROOT = '../dist/media'

To make media available in DEBUG mode, you might want to add to the main urls.py:

if settings.DEBUG:
    # Serving files uploaded by a user during development
    urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

Credits

Tools used in rendering this package:

History

0.2.0 (2016-11-17)

  • Add django admin interface.

  • Add migrations folder.

  • Add log policies for submitting tasks.

  • Add return value for modified files.

0.1.1 (2016-11-15)

  • Add port number to Server model.

  • Add task to submit jobs.

  • Add status updates to task.

  • Fix unicode error when submitting jobs.

  • Fix verbose/related names for models.

0.1.0 (2016-11-08)

  • First release on PyPI.

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