Django daphne ModuleNotFoundError docker error
I got this error "ModuleNotFoundError: No module named 'project'" when I contarize my web app. I used Django with daphne. it's my settings here:
Dockerfile:
FROM python:3.11-slim
RUN apt-get update && apt-get install -y \
libpq-dev gcc curl \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/*
WORKDIR /backend
COPY requirements.txt /backend/
RUN pip install --no-cache-dir -r /backend/requirements.txt
COPY . /backend/
WORKDIR /backend/project
RUN python /backend/project/manage.py collectstatic --noinput
RUN chown -R www-data:www-data /backend
USER www-data
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONPATH="."
ENV DJANGO_SETTINGS_MODULE=project.settings
EXPOSE 8000
#CMD ["python","manage.py","runserver"]
CMD ["daphne", "-b", "0.0.0.0", "-p", "8000", "project.asgi:application"]
docker-compose:
version: '3.9'
services:
web:
build:
context: .
dockerfile: dockerfile
container_name: c_django
working_dir: /backend/project
command: >
daphne -b 0.0.0.0 -p 8000 project.asgi:application
# python manage.py runserver
volumes:
- ./backend:/backend:delegated
- ./backend/project/images:/backend/project/images
- ./backend/project/staticfiles:/backend/project/staticfiles
ports:
- 8000:8000
environment:
ALLOWED_HOSTS: '*'
DEBUG: 'True'
SECRET_KEY: 1vbl8yp&1*c6)+-o!9r_)_1oo$x*-en^mu0#c*wcojb1j#-=20
PYTHONPATH: "."
DJANGO_SETTINGS_MODULE: "project.settings"
DATABASE_NAME: fitness
DATABASE_USER: postgres
DATABASE_PASSWORD: 123456
DATABASE_HOST: db
DATABASE_PORT: 5432
REDIS_URL: redis://redis:6379/1
depends_on:
- db
- redis
networks:
- frontend_backend
db:
image: postgres:15
container_name: c_postgres
environment:
POSTGRES_USER: postgres
POSTGRES_PASSWORD: 123456
POSTGRES_DB: fitness
ports:
- 5432:5432
volumes:
- postgres_data:/var/lib/postgresql/data
networks:
- frontend_backend
frontend:
build:
context: ../frontend
dockerfile: Dockerfile
container_name: c_frontend
volumes:
- ../frontend/dist:/usr/share/nginx/html
- ../frontend/nginx/nginx.conf:/etc/nginx/nginx.conf
ports:
- 8080:80
depends_on:
- web
networks:
- frontend_backend
nginx:
image: nginx:latest
container_name: c_nginx
volumes:
- ../frontend/nginx/nginx.conf:/etc/nginx/nginx.conf
- ../frontend/dist:/usr/share/nginx/html
- ./backend/project/images:/usr/share/nginx/html/images
- ./backend/project/static:/usr/share/nginx/html/static
ports:
- 80:80
depends_on:
- web
- frontend
networks:
- frontend_backend
redis:
image: redis:alpine
container_name: c_redis
ports:
- 6379:6379
networks:
- frontend_backend
volumes:
postgres_data:
networks:
frontend_backend:
driver: bridge
And my directory:
Directory: C:\Users\emirh\OneDrive\Belgeler\GitHub\drf-vue3-gym-managament\backend\project
Mode LastWriteTime Length Name
---- ------------- ------ ----
d----- 26.06.2024 04:18 API
d----- 27.05.2024 01:51 ckeditor
d----- 23.06.2024 20:42 fixtures
d----- 31.05.2024 04:44 images
d----- 5.12.2024 22:34 project
d----- 11.01.2025 23:49 staticfiles
-a---- 29.04.2024 00:53 685 manage.py
Directory: C:\Users\emirh\OneDrive\Belgeler\GitHub\drf-vue3-gym-managament\backend\project\project
Mode LastWriteTime Length Name
---- ------------- ------ ----
d----- 2.02.2025 21:56 __pycache__
-a---- 15.01.2025 15:41 624 asgi.py
-a---- 2.02.2025 23:44 8259 settings.py
-a---- 3.12.2024 01:29 174 urls.py
-a---- 29.04.2024 00:53 407 wsgi.py
-a---- 29.04.2024 00:53 0 __init__.py
And this is error:
c_postgres |
c_postgres | PostgreSQL Database directory appears to contain a database; Skipping initialization
c_postgres |
c_postgres |
c_postgres | 2025-02-02 20:57:08.744 UTC [1] LOG: starting PostgreSQL 15.10 (Debian 15.10-1.pgdg120+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit
c_postgres | 2025-02-02 20:57:08.814 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
c_postgres | 2025-02-02 20:57:08.814 UTC [1] LOG: listening on IPv6 address "::", port 5432
c_postgres | 2025-02-02 20:57:08.818 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
c_postgres | 2025-02-02 20:57:08.824 UTC [29] LOG: database system was shut down at 2025-02-02 20:53:24 UTC
c_postgres | 2025-02-02 20:57:08.838 UTC [1] LOG: database system is ready to accept connections
c_frontend | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
c_frontend | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
c_django | Traceback (most recent call last):
c_django | File "/usr/local/bin/daphne", line 8, in <module>
c_frontend | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
c_django | sys.exit(CommandLineInterface.entrypoint())
c_django | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
c_django | File "/usr/local/lib/python3.11/site-packages/daphne/cli.py", line 171, in entrypoint
c_django | cls().run(sys.argv[1:])
c_django | File "/usr/local/lib/python3.11/site-packages/daphne/cli.py", line 233, in run
c_django | application = import_by_path(args.application)
c_django | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
c_django | File "/usr/local/lib/python3.11/site-packages/daphne/utils.py", line 17, in import_by_path
c_django | target = importlib.import_module(module_path)
c_django | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
c_django | File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
c_django | return _bootstrap._gcd_import(name[level:], package, level)
c_django | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
c_django | File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
c_django | File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
c_django | File "<frozen importlib._bootstrap>", line 1126, in _find_and_load_unlocked
c_django | File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
c_django | File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
c_django | File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
c_django | File "<frozen importlib._bootstrap>", line 1140, in _find_and_load_unlocked
c_django | ModuleNotFoundError: No module named 'project'
c_frontend | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
c_frontend | 10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
c_frontend | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
c_frontend | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
c_frontend | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
c_frontend | /docker-entrypoint.sh: Configuration complete; ready for start up
c_nginx | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
c_nginx | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
c_nginx | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
c_nginx | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
c_nginx | 10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
c_nginx | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
c_nginx | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
c_nginx | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
c_nginx | /docker-entrypoint.sh: Configuration complete; ready for start up
c_django exited with code 1
c_nginx | 2025/02/02 20:57:09 [emerg] 1#1: host not found in upstream "web" in /etc/nginx/nginx.conf:23
c_nginx | nginx: [emerg] host not found in upstream "web" in /etc/nginx/nginx.conf:23
c_nginx exited with code 1
c_postgres | 2025-02-02 21:02:08.942 UTC [27] LOG: checkpoint starting: time
c_postgres | 2025-02-02 21:02:08.963 UTC [27] LOG: checkpoint complete: wrote 3 buffers (0.0%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.005 s, sync=0.003 s, , sync=0.003 s, total=0.022 s; sync files=2, longest=0.002 s, average=0.002 s; distance=0 kB, estimate=0 kB
asgi.py:
import os
import django
from django.core.asgi import get_asgi_application
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.auth import AuthMiddlewareStack
from channels.security.websocket import AllowedHostsOriginValidator
import API.routing
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'project.settings')
django.setup()
application = ProtocolTypeRouter({
"http": get_asgi_application(),
"websocket": AllowedHostsOriginValidator(
AuthMiddlewareStack(
URLRouter(
API.routing.websocket_urlpatterns
)
),
),
})
How can I solve this problem ? Where did I make a mistake here ? I searched it but did not find anything or I couldn't solve it. I am beginner in docker. Thanks.
By default, Python searches for modules underneath the current directory. If you're importing project.asgi, Python expects that to be in project/asgi.py underneath the current directory. In the Dockerfile, you've set WORKDIR to be in the project directory, though, so you're not seeing that module structure.
I'd keep the first WORKDIR line you have, and not change directories after that. In the various places it matters, I'd take advantage of being in a current directory and not repeat the absolute path unnecessarily.
WORKDIR /backend
# Don't repeat the directory name in these commands
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt
# `RUN cd ...` goes away at the end of the current command
RUN cd project && ./manage.py collectstatic --noinput
# Don't chown the directory, the files should not be writable
USER www-data
# The WORKDIR is still /backend, so project/asgi.py exists
CMD ["daphne", "-b", "0.0.0.0", "-p", "8000", "project.asgi:application"]
The other thing you need to make sure to do is not overwrite the image's code with Compose volumes:. The volumes: you show will work only if the host directory layout exactly matches what's in the image, and it will hide work like the manage.py collectstatic line in the Dockerfile. You also need to make sure to not override the image's working_dir: with the incorrect value.
You can simplify many of the options you show; I might cut this down to
version: '3.8' # last defined 3.x file version
services:
web:
build: . # short form with default Dockerfile and no build args
ports:
- 8000:8000
environment:
# repeat the settings from the question
# (except move $DJANGO_SETTINGS_MODULE to the image and remove $PYTHONPATH)
depends_on:
- db
- redis
# no networks:, use Compose-provided `default`
# no volumes:
# do not override image's command: or working_dir:
# do not need to override Compose-provided container_name:
You can make similar changes to the other services, making sure to delete volumes: for reproducibility and especially making sure to delete networks: everywhere so that every container uses the Compose-provided default network.
I did not understand what u said about dockerfile actually.
This is my new code and I have this mistake:
FROM python:3.11-slim
RUN apt-get update && apt-get install -y \
libpq-dev gcc curl \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/*
WORKDIR /backend
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt
COPY . /backend/
#WORKDIR /backend/project
RUN cd project && ./manage.py collectstatic --noinput
#RUN chown -R www-data:www-data
USER www-data
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONPATH="."
ENV DJANGO_SETTINGS_MODULE=project.settings
EXPOSE 8000
#CMD ["python","manage.py","runserver"]
CMD ["daphne", "-b", "0.0.0.0", "-p", "8000", "project.asgi:application"]
and mistake :
ERROR [web 8/9] RUN cd project && ./manage.py collectstatic --noinput 0.2s
------
> [web 8/9] RUN cd project && ./manage.py collectstatic --noinput:
0.211 /bin/sh: 1: ./manage.py: not found
------
failed to solve: process "/bin/sh -c cd project && ./manage.py collectstatic --noinput" did not complete successfully: exit code: 127
My english is not good enought. Can you explain it more basically please ? Thanks.