Update Dockerfile #96
Conversation
WalkthroughThe Dockerfile was revised to enhance readability by adding a blank line after copying the requirements file. Previously commented-out commands for database migrations and server startup were removed. A new CMD instruction was introduced to execute Django migrations and then launch the development server on port 8000. Changes
Estimated code review effort🎯 1 (Trivial) | ⏱️ ~2 minutes Poem
Note ⚡️ Unit Test Generation is now available in beta!Learn more here, or try it out under "Finishing Touches" below. ✨ Finishing Touches🧪 Generate unit tests
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. 🪧 TipsChatThere are 3 ways to chat with CodeRabbit:
SupportNeed help? Create a ticket on our support page for assistance with any issues or questions. Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments. CodeRabbit Commands (Invoked using PR comments)
Other keywords and placeholders
CodeRabbit Configuration File (
|
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
|
|
||
| # Run migrations then start the server on 0.0.0.0:8000 | ||
| CMD python manage.py migrate && python manage.py runserver 0.0.0.0:8000 |
There was a problem hiding this comment.
🛠️ Refactor suggestion
runserver in CMD is unsuitable for production & loses signal handling
The added CMD runs Django’s dev server after applying migrations.
Issues:
python manage.py runserveris single-threaded, slow, and not meant for production; usegunicorn/uvicorninstead.- Shell form (
CMD ... && ...) launches a shell as PID 1 so signals (SIGTERM, SIGINT) may not reach the Django process → containers may hang on shutdown. - Running migrations on every container start can race when multiple replicas launch concurrently. Prefer a separate init/entrypoint step (or CI/CD migration job) and keep the app container focused on serving traffic.
Suggested fix (example):
-# Run migrations then start the server on 0.0.0.0:8000
-CMD python manage.py migrate && python manage.py runserver 0.0.0.0:8000
+# Apply migrations once, then hand off to Gunicorn with proper signal handling
+ENTRYPOINT ["sh", "-c", "python manage.py migrate --noinput && \
+ exec gunicorn project.wsgi:application --bind 0.0.0.0:8000"](Replace project.wsgi with your actual WSGI module.)
This switches to exec-form, forwards signals correctly, and uses a production-grade server.
Consider moving migrations to a one-off job if concurrent starts are expected.
🤖 Prompt for AI Agents
In Dockerfile lines 19 to 21, replace the CMD that runs migrations and starts
Django's development server with an exec-form CMD that launches a
production-grade server like gunicorn or uvicorn to handle signals properly and
improve performance. Remove running migrations from the CMD to avoid race
conditions on container start; instead, run migrations as a separate
initialization or CI/CD job. Update the CMD to directly exec the production
server with the correct WSGI or ASGI module for your project.
1 participant
Summary by CodeRabbit