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[英]django.db.utils.OperationalError: could not translate host name "db" to address: Temporary failure in name resolution. Django for professionals book
[英]Docker django.db.utils.OperationalError: could not translate host name “db” to address: Temporary failure in name resolution
似乎是一個常見的錯誤。 我遵循了 Stackoverflow 上的所有可能的建議(添加鏈接、網絡等),但對我來說沒有任何區別。 我在 Windows 上運行。
我的 Dockerfile:
#Pull base image.
FROM python:3.9.5-slim
#Usefull to get logs
ENV PYTHONUNBUFFERED 1
#Make local dir
RUN mkdir -p /app
#set as the working directory
WORKDIR /app
#https://luis-sena.medium.com/creating-the-perfect-python-dockerfile-51bdec41f1c8
COPY requirements.txt .
#now copy all the files in this directory to \code
ADD . .
#https://testdriven.io/blog/dockerizing-django-with-postgres-gunicorn-and-nginx/
RUN apt-get update && \
apt-get install -y postgresql-server-dev-all gcc python3-dev musl-dev && \
pip install -r requirements.txt && \
adduser --disabled-password --no-create-home app
USER app
#CMD python manage.py runserver
CMD gunicorn --bind 0.0.0.0:8000 app.wsgi:application -k eventlet
接下來,我的 docker-compose.yml:
services:
web:
build: .
ports:
- "8000:8000"
volumes:
- .:/app
links:
- db:db
container_name: heritageapi_web_1
depends_on:
- db
networks:
- heritage-network
db:
image: postgres:13.3
container_name: db
restart: always
networks:
- heritage-network
environment:
POSTGRES_DATABASE: admin
POSTGRES_USER: root
POSTGRES_PASSWORD: root
POSTGRES_ROOT_PASSWORD: root
volumes:
- .dbdata:/var/lib/postgres
ports:
- "32768:5432"
networks:
heritage-network:
driver: bridge
我的 .env: DB_NAME=admin DB_USER=root DB_PASSWORD=root DB_HOST=db DB_PORT=5432
最后我的settings.py:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql',
'NAME': os.getenv('DB_NAME'),
'USER': os.getenv('DB_USER'),
'PASSWORD': os.getenv('DB_PASSWORD'),
'HOST': os.getenv('DB_HOST'),
'PORT': os.getenv('DB_PORT'),
}
}
我在 Web 容器中沒有看到 .env 文件。 它應該是這樣的:
services:
web:
depends_on:
- db
env_file:
- .env.dev
如果一切正常,則使用docker-compose exec
輸入運行 docker 容器並打印
python manage.py shell
>> from django.conf import settings
>> settings.DB_HOST
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