Config file is ignored when running in docker

[rofr]

I'm building a custom docker image including a script and a config file. The config file is completely ignored.

(venv) Roberts-MBP:xxxxxxxx-cloud rf$ docker run --name locust --network host -it --entrypoint bash xxxxxxx-locust 
locust@docker-desktop:/tests$ ls
__pycache__  locust.conf  locustfile.py
locust@docker-desktop:/tests$ locust --config locust.conf --headless --loglevel DEBUG --host http://localhost:8080
[2025-02-27 20:00:08,154] docker-desktop/INFO/locust.main: Starting Locust 2.32.10
[2025-02-27 20:00:08,154] docker-desktop/INFO/locust.main: No run time limit set, use CTRL+C to interrupt

Contents of the locust.conf file:

locustfile = "/tests"
users = 10
host = "http://localhost:8080"
run-time = "60s"
only-summary = true
csv = "project-name"
json = true
loglevel = "DEBUG"
html = "locust.html"

Here is my Dockerfile:

FROM locustio/locust:2.33
WORKDIR /tests
COPY projectname/tests/locust/. .
COPY docker/locust/locust.conf .

ENTRYPOINT ["locust", "--config", "locust.conf", "--headless"]

I tried an older image just in case, 2.32.10, and get the same outcome.

Is this expected behavior? Or am I doing something stupid?

[cyberw]

Hmm... it works fine for me!

It seems configargparse ignores the last line if there isnt a newline at the end, but other than that I cant reproduce.

❯ docker run -it --entrypoint bash locustio/locust:master
locust@fcac7d0e8f12:~$ echo 'locustfile = "foo.py"' >> locust.conf
locust@fcac7d0e8f12:~$ locust
Could not find 'locustfile.py'. Ensure your locustfile ends with '.py' or is a directory with locustfiles. See --help for available options.
locust@fcac7d0e8f12:~$ echo 'locustfile = "foo.py"' >> locust.conf
locust@fcac7d0e8f12:~$ locust
Could not find 'foo.py'. Ensure your locustfile ends with '.py' or is a directory with locustfiles. See --help for available options.