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Event Sink ClickHouse

Purpose

This project acts as a plugin to the Edx Platform, listens for configured Open edX events, and sends them to a ClickHouse database for analytics or other processing. This is being maintained as part of the Aspects project.

OARS consumes the data sent to ClickHouse by this plugin as part of data enrichment for reporting, or capturing data that otherwise does not fit in xAPI.

Sinks

Currently the only sink is in the CMS. It listens for the COURSE_PUBLISHED signal and serializes a subset of the published course blocks into one table in ClickHouse.

Commands

In addition to being an event listener, this package provides commands for exporting the same data in bulk. This allows bootstrapping a new data platform or backfilling lost or missing data. Currently the only command is the Django command for the COURSE_PUBLISHED data:

python manage.py cms dump_courses_to_clickhouse

This command allows bulk export of all courses, or various limiting factors. Please see the command help for details:

python manage.py cms dump_courses_to_clickhouse -h

Getting Started

Developing

One Time Setup

# Clone the repository
git clone [email protected]:openedx/openedx-event-sink-clickhouse.git
cd openedx-event-sink-clickhouse

# Set up a virtualenv using virtualenvwrapper with the same name as the repo and activate it
mkvirtualenv -p python3.8 openedx-event-sink-clickhouse

Every time you develop something in this repo

# Activate the virtualenv
workon openedx-event-sink-clickhouse

# Grab the latest code
git checkout main
git pull

# Install/update the dev requirements
make requirements

# Run the tests and quality checks (to verify the status before you make any changes)
make validate

# Make a new branch for your changes
git checkout -b <your_github_username>/<short_description>

# Using your favorite editor, edit the code to make your change.
vim ...

# Run your new tests
pytest ./path/to/new/tests

# Run all the tests and quality checks
make validate

# Commit all your changes
git commit ...
git push

# Open a PR and ask for review.

Deploying

The Open edX Event Sink Clickhouse component is a django plugin which doesn't need independent deployment. Therefore, its setup is reasonably straightforward. First, it needs to be added to your service requirements, and then it will be installed alongside requirements of the service.

This plugin will be deployed by default in an OARS Tutor environment. For other deployments install the library or add it to private requirements of your virtual environment ( requirements/private.txt ).

  1. Run pip install openedx-event-sink-clickhouse.
  2. Run migrations:
  • python manage.py lms migrate
  • python manage.py cms migrate
  1. Restart LMS service and celery workers of edx-platform.

Configuration

Currently all events will be listened to by default (there is only one). So the only necessary configuration is a ClickHouse connection:

EVENT_SINK_CLICKHOUSE_BACKEND_CONFIG = {
    # URL to a running ClickHouse server's HTTP interface. ex: https://foo.openedx.org:8443/ or
    # http://foo.openedx.org:8123/ . Note that we only support the ClickHouse HTTP interface
    # to avoid pulling in more dependencies to the platform than necessary.
    "url": "http://clickhouse:8123",
    "username": "changeme",
    "password": "changeme",
    "database": "event_sink",
    "timeout_secs": 3,
}

Getting Help

Documentation

See documentation on Read the Docs.

More Help

If you're having trouble, we have discussion forums at https://discuss.openedx.org where you can connect with others in the community.

Our real-time conversations are on Slack. You can request a Slack invitation, then join our community Slack workspace.

For anything non-trivial, the best path is to open an issue in this repository with as many details about the issue you are facing as you can provide.

https://github.com/openedx/openedx-event-sink-clickhouse/issues

For more information about these options, see the Getting Help page.

License

The code in this repository is licensed under the AGPL 3.0 unless otherwise noted.

Please see LICENSE.txt for details.

Contributing

Contributions are very welcome. Please read How To Contribute for details.

This project is currently accepting all types of contributions, bug fixes, security fixes, maintenance work, or new features. However, please make sure to have a discussion about your new feature idea with the maintainers prior to beginning development to maximize the chances of your change being accepted. You can start a conversation by creating a new issue on this repo summarizing your idea.

The Open edX Code of Conduct

All community members are expected to follow the Open edX Code of Conduct.

People

The assigned maintainers for this component and other project details may be found in Backstage. Backstage pulls this data from the catalog-info.yaml file in this repo.

Reporting Security Issues

Please do not report security issues in public. Please email [email protected].