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feat: enable scheduler execution in Docker by checking UVICORN_MAIN environment variable

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ramvignesh-b
2026-04-29 02:20:18 +05:30
parent 4893c91c20
commit 150832419a
2 changed files with 8 additions and 3 deletions
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backend/Dockerfile
+2 -1
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@@ -12,4 +12,5 @@ COPY . .
EXPOSE 8000 EXPOSE 8000
CMD ["sh", "-c", "uv run manage.py migrate && uv run gunicorn --bind 0.0.0.0:8000 --access-logfile - --error-logfile - --capture-output --log-level debug config.wsgi:application"] # NOTE: Exporting env var 'UVICORN_MAIN=true' is required for the scheduler to run on app start.
CMD ["sh", "-c", "uv run manage.py migrate && UVICORN_MAIN=true uv run gunicorn --bind 0.0.0.0:8000 --access-logfile - --error-logfile - --capture-output --log-level debug config.wsgi:application"]
backend/letters/apps.py
+6 -2
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@@ -10,9 +10,13 @@ class LettersConfig(AppConfig):
""" """
Start the scheduler only when the server is starting. Start the scheduler only when the server is starting.
NOTE: If we don't check for RUN_MAIN, the scheduler triggers for all django operations (migration, test etc.) NOTE: If we don't check for RUN_MAIN, the scheduler triggers for all django operations (migration, test etc.)
NOTE++: For uvicorn, we make sure to set the env var `UVICORN_MAIN` to `true` in the docker command.
""" """
if not (
if not (os.environ.get("RUN_MAIN") == "true" or os.environ.get("WERKZEUG_RUN_MAIN") == "true"): os.environ.get("RUN_MAIN") == "true"
or os.environ.get("WERKZEUG_RUN_MAIN") == "true"
or os.environ.get("UVICORN_MAIN") == "true"
):
return return
from .tasks import start_scheduler from .tasks import start_scheduler