Celery worker fails to start in development due to tty: open

[regisb]

Bug description

The lms-worker and cms-worker fail to start in development.

How to reproduce

$ tutor dev start cms-worker
cms-worker_1                 | Traceback (most recent call last):
cms-worker_1                 |   File "/openedx/venv/bin/celery", line 8, in <module>
cms-worker_1                 |     sys.exit(main())
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/__main__.py", line 16, in main
cms-worker_1                 |     _main()
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/celery.py", line 322, in main
cms-worker_1                 |     cmd.execute_from_commandline(argv)
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/celery.py", line 499, in execute_from_commandline
cms-worker_1                 |     super(CeleryCommand, self).execute_from_commandline(argv)))
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/base.py", line 305, in execute_from_commandline
cms-worker_1                 |     return self.handle_argv(self.prog_name, argv[1:])
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/celery.py", line 491, in handle_argv
cms-worker_1                 |     return self.execute(command, argv)
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/celery.py", line 415, in execute
cms-worker_1                 |     return cls(
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/worker.py", line 221, in run_from_argv
cms-worker_1                 |     *self.parse_options(prog_name, argv, command))
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/base.py", line 428, in parse_options
cms-worker_1                 |     self.parser = self.create_parser(prog_name, command)
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/base.py", line 440, in create_parser
cms-worker_1                 |     description=self._format_description(self.description),
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/bin/base.py", line 462, in _format_description
cms-worker_1                 |     text.fill_paragraphs(text.dedent(description), width))
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/utils/text.py", line 58, in fill_paragraphs
cms-worker_1                 |     return sep.join(fill(p, width) for p in s.split(sep))
cms-worker_1                 |   File "/openedx/venv/lib/python3.8/site-packages/celery/utils/text.py", line 58, in <genexpr>
cms-worker_1                 |     return sep.join(fill(p, width) for p in s.split(sep))
cms-worker_1                 |   File "/opt/pyenv/versions/3.8.12/lib/python3.8/textwrap.py", line 391, in fill
cms-worker_1                 |     return w.fill(text)
cms-worker_1                 |   File "/opt/pyenv/versions/3.8.12/lib/python3.8/textwrap.py", line 363, in fill
cms-worker_1                 |     return "\n".join(self.wrap(text))
cms-worker_1                 |   File "/opt/pyenv/versions/3.8.12/lib/python3.8/textwrap.py", line 354, in wrap
cms-worker_1                 |     return self._wrap_chunks(chunks)
cms-worker_1                 |   File "/opt/pyenv/versions/3.8.12/lib/python3.8/textwrap.py", line 248, in _wrap_chunks
cms-worker_1                 |     raise ValueError("invalid width %r (must be > 0)" % self.width)
cms-worker_1                 | ValueError: invalid width -2 (must be > 0)

Additional context

This issue seems to be due to the tty: open option in the dev/docker-compose.yml template. It was reported upstream here: celery/celery#6302
edx-platform runs celery==4.4.7, and the issue is supposed to be fixed in 5.0.0. Indeed, the issue is fixed in Nutmeg, which runs celery==5.2.6.