I'm trying to create a Django app in a docker container. The app would use a postgres db with postgis extension, which I have in another database. I'm trying to solve this using docker-compose but can not get it working.
I can get the app working without the container with the database containerized just fine. I can also get the app working in a container using a sqlite db (so a file included without external container dependencies). Whatever I do, it can't find the database.
My docker-compose file:
version: '3.7'
services:
postgis:
image: kartoza/postgis:12.1
volumes:
- postgres_data:/var/lib/postgresql/data/
ports:
- "${POSTGRES_PORT}:5432"
environment:
- POSTGRES_USER=${POSTGRES_USER}
- POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
- POSTGRES_DB=${POSTGRES_DB}
env_file:
- .env
web:
build: .
# command: sh -c "/wait && python manage.py migrate --no-input && python /code/app/manage.py runserver 0.0.0.0:${APP_PORT}"
command: sh -c "python manage.py migrate --no-input && python /code/app/manage.py runserver 0.0.0.0:${APP_PORT}"
# restart: on-failure
ports:
- "${APP_PORT}:8000"
volumes:
- .:/code
depends_on:
- postgis
env_file:
- .env
environment:
WAIT_HOSTS: 0.0.0.0:${POSTGRES_PORT}
volumes:
postgres_data:
name: ${POSTGRES_VOLUME}
My Dockerfile (of the app):
# Pull base image
FROM python:3.7
LABEL maintainer="[email protected]"
# Set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
# install dependencies
# RUN pip install pipenv
RUN pip install pipenv
RUN mkdir /code/
COPY . /code
WORKDIR /code/
RUN pipenv install --system
# RUN pipenv install pygdal
RUN apt-get update &&\
apt-get install -y binutils libproj-dev gdal-bin python-gdal python3-gdal postgresql-client
## Add the wait script to the image
ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.7.3/wait /wait
RUN chmod +x /wait
# set work directory
WORKDIR /code/app
# RUN python manage.py migrate --no-input
# CMD ["python", "manage.py", "migrate", "--no-input"]
# RUN cd ${WORKDIR}
# If we want to run docker by itself we need to use below
# but if we want to run from docker-compose we'll set it there
EXPOSE 8000
# CMD /wait && python manage.py migrate --no-input
# CMD ["python", "manage.py", "migrate", "--no-input"]
# CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]
My .env file:
# POSTGRES
POSTGRES_PORT=25432
POSTGRES_USER=username
POSTGRES_PASSWORD=pass
POSTGRES_DB=db
POSTGRES_VOLUME=data
POSTGRES_HOST=localhost
# GEOSERVER
# DJANGO
APP_PORT=8000
And finally my in my settings.py of the django app:
DATABASES = {
'default': {
'ENGINE': 'django.contrib.gis.db.backends.postgis',
'NAME': os.getenv('POSTGRES_DBNAME'),
'USER': os.getenv('POSTGRES_USER'),
'PASSWORD': os.getenv('POSTGRES_PASS'),
'HOST': os.getenv("POSTGRES_HOST", "localhost"),
'PORT': os.getenv('POSTGRES_PORT')
}
}
I've tried quite a lot of things (as you see in some comments). I realized that docker-compose doesn't seem to wait until postgres is fully up, spinning and accepting requests so I tried to build in a waiting function (as suggested on the website). I first had migrations and running the server inside the Dockerfile (migrations in the build process and runserver as the startup command), but that requires postgres and as it wasn't waiting for it it didn't function. I finally took it all out to the docker-compose.yml file but still can't get it working.
The error I get:
web_1 | Is the server running on host "localhost" (127.0.0.1) and accepting
web_1 | TCP/IP connections on port 25432?
web_1 | could not connect to server: Cannot assign requested address
web_1 | Is the server running on host "localhost" (::1) and accepting
web_1 | TCP/IP connections on port 25432?
Does anybody have an idea why this isn't working?
postgisfor your databaseHOST