Скачать или смотреть Resolving the Kombu Connection Refused[111] Error in Django Pytest with RabbitMQ and Celery

Learn how to resolve the `Kombu Connection refused` error while testing Django applications with Pytest, RabbitMQ, and Celery, including GitHub CI/CD setup.
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Overcoming the Kombu Connection Refused[111] Error in Django Pytest with RabbitMQ and Celery

Developing applications often involves using background task processing with tools like Celery and message brokers like RabbitMQ. However, when setting up tests with Django and Pytest, you might encounter issues, particularly with the Kombu Connection refused[111] error. This error can disrupt your testing flow and affect your CI/CD process, especially when using platforms like GitHub Actions.

Understanding the Problem

The Kombu Connection refused[111] error typically indicates that your Django application is unable to connect to the RabbitMQ server while running tests. This situation arises particularly when you kick off Pytest without having RabbitMQ up and running, leading to complications when you trigger Celery tasks during tests.

As a result, your test cases may fail, and you'll see error messages similar to:

[[See Video to Reveal this Text or Code Snippet]]

This issue is not only a hindrance on your local machine but can also disrupt your Continuous Integration (CI) pipeline if you're using GitHub Actions for testing your Django application.

The Solution

Starting RabbitMQ for Local Tests

To successfully run tests that involve Celery tasks, you need RabbitMQ running as it serves as a broker for message communication. In a local testing environment, make sure that the RabbitMQ server is started before running Pytest. You can do it manually or set it up through a Docker container if necessary.

Configuring GitHub Actions for RabbitMQ

If you're executing tests on GitHub Actions, you'll have to configure your CI/CD pipeline to include RabbitMQ. An important step is to ensure you have your RabbitMQ service setup correctly in your github-actions.yml file.

Here’s How to Adjust Your Configuration:

Change Service Port:
Make sure to use dynamic ports in your service settings to avoid hard-coding issues. Here is the recommended structure for your .yml file:

[[See Video to Reveal this Text or Code Snippet]]

Re-running Your Tests:
With this configuration, when you push your code to GitHub, the RabbitMQ service will be correctly initialized on the specified port, enabling your tests to communicate with it effectively.

Resulting Benefits

By implementing the above solutions, you should be able to resolve the Kombu Connection refused issue both locally and in your CI environment. You will notice that your test cases that call for Celery tasks pass successfully without throwing the previous connection error, thereby streamlining your development and testing process.

Conclusion

In summary, the Kombu Connection refused[111] error can be a significant obstacle in your Django testing journey, especially when using RabbitMQ and Celery for background tasks. However, by ensuring that RabbitMQ is running prior to executing tests, and correctly configuring your CI/CD pipelines, you can overcome this issue and maintain a robust workflow.

Happy coding and testing!