How to access postgres database on host from within docker container? - django

Question

I have a docker-compose file with django project that trying to use database situated on host machine.
Now my Dockerfile is:
FROM python:3-slim
ENV PYTHONUNBUFFERED 1
RUN mkdir /code.
WORKDIR /code
ADD . /code/
RUN pip install -r requirements.txt
RUN export dockerhost=$(docker-machine ip)
docker-compose.yml:
version: "2"
networks:
workernetwork:
webnetwork:
services:
static:
volumes:
- /static:/static
- /media:/media
image: alpine:latest
web:
build: .
command: bash -c "SECRET_KEY=temp_value python /code/manage.py collectstatic --noinput && python /code/manage.py migrate && /code/run_gunicorn.sh"
volumes:
- .:/code
volumes_from:
- static
env_file:
- secrets.env
ports:
- 443:443
networks:
- webnetwork
extra_hosts:
- "dockerhost:${dockerhost}"
DATABASES in settings.py:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'revolution',
'USER': get_env_setting('POSTGRES_USER'),
'PASSWORD': get_env_setting('POSTGRES_PASSWORD'),
'HOST': 'dockerhost',
'PORT': 5432,
}
}
What Im doing wrong?
Thx for attention!

Answer 1

Finally resolved with docker volume:
as first, create volume:
docker volume create --name=coredb
docker-compose.yml
version: "2"
services:
...
web:
build:
context: .
command: bash -c "python /code/manage.py collectstatic --noinput && python /code/manage.py migrate && /code/run_gunicorn.sh"
volumes:
- /static:/data/web/static
- /media:/data/web/media
- .:/code
env_file:
- ../.env
depends_on:
- db
db:
restart: always
image: postgres
env_file:
- ../.env
volumes:
- pgdata: /var/lib/postgresql/data
volumes:
pgdata:
external:
name: coredb
.env variables:
POSTGRES_DB={hidden}
POSTGRES_USER={hidden}
POSTGRES_PASSWORD={hidden}
Important:
You need to create database and user manually via docker exec -it backend_db_1 bash and following this instructions till Install Django within a Virtual Environment chapter