HTTP Request ConnectionRefusedError

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I am testing my API during my build process. From the logs I can see the API starts correctly but all http requests sent by my unit test fail with the error message:

ConnectionRefusedError: [Errno 111] Connection refused

Here is the configuration I have in config.yml for these two steps;

  - run:
      name: Start API
      command: |
        . gql/bin/activate
        cd example
        python3 api.py
      background: true

  - run:
      name: Run Tests
      command: |
        . gql/bin/activate
        nose2 --plugin nose2.plugins.junitxml --junit-xml -v

When I start the API locally on my machine and run the tests, everything runs fine. From this point I’m a little bit stuck and don’t know how to investigate:

  • Is the issue coming from the API which is actually not running in background?
  • Is the issue coming from the http requests?

Here is an example of build failing: https://circleci.com/gh/alexisrolland/flask-graphene-sqlalchemy/14

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Couple of things to try:

  • There have been some reports of unusual DNS behaviour recently in CircleCI. It looks like you’re listening on 127.0.0.1:5000, so make sure your client is making requests on that IP and not on localhost.
  • Consider adding a sleep 5 at the start of your tests - perhaps the server has not fully settled down before you are trying to make connections
  • In your “Run Tests” section you could do a ps aux before your activate to see what is running
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