So I have a successfully built image where I have postgres mounted as a volume, however I keep getting django.db.utils.OperationalError: could not connect to server: Connection refused- when I ran docker-compose up. My Dockerfile and docker-compose.yml looks like this:
# syntax=docker/dockerfile:1
FROM python:3.10-slim-buster
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
WORKDIR /track
COPY requirements.txt .
RUN apt-get update \
&& apt-get -y install libpq-dev gcc \
&& pip install --upgrade pip \
&& pip install --default-timeout=100 -r requirements.txt
COPY . .
ENV DJANGO_SETTINGS_MODULE track.settings
EXPOSE 8000
version: "3.9"
services:
django:
build: .
command: python manage.py runserver 0.0.0.0:8000
stdin_open: true
tty: true
volumes:
- .:/track
ports:
- "8000:8000"
depends_on:
- db
db:
image: postgres:9.6.10-alpine
restart: always
user: postgres
volumes:
- track_db:/var/lib/postgresql/data
environment:
POSTGRES_USER: postgres
POSTGRES_PASS: postgres
POSTGRES_DB: postgres
volumes:
track_db: {}
Please, what am I doing wrong?
Jango service must be linked to db:
services:
django:
build: .
command: python manage.py runserver 0.0.0.0:8000
stdin_open: true
tty: true
volumes:
- .:/track
ports:
- "8000:8000"
depends_on:
- db
links:
- db
Now you can connect to db by container hostname
Related
I have been trying to containerise a project of mine that uses postgresql. But for some reason it is unable to perform the commands completely, when I check the web container, by following it on docker-desktop I can see that it is performing the migrations but at some point it stops and gives me the following error:
2023-01-17 19:51:29 Apply all migrations: admin, auth, company, contenttypes, oauth2_provider, product, sessions, social_django, users, warehouse
2023-01-17 19:51:29 Running migrations:
2023-01-17 19:51:29 No migrations to apply.
2023-01-17 19:51:29 sh: manage.py: not found
For some reason it does not see manage.py.
When I run docker-compose run web sh and when I check if manage.py exists in the directory using ls in the CLI I discover it is there.
What could I be doing wrong here?
The Dockerfile:
# pull official base image
FROM python:3.9-alpine
# set work directory
WORKDIR /app
# set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
# install psycopg2 dependencies
RUN apk update \
&& apk add postgresql-dev gcc python3-dev musl-dev
# install python dependencies
RUN apk add -u zlib-dev jpeg-dev libffi-dev gcc musl-dev
RUN python3 -m pip install --upgrade pip
COPY requirements.txt /app/requirements.txt
RUN pip install --no-cache-dir -r requirements.txt
# copy project
COPY . .
The docker-compose.yml:
version: '3.9'
services:
nginx:
container_name: core_web
restart: on-failure
image: nginx:stable
volumes:
- ./nginx/nginx.dev.conf:/etc/nginx/conf.d/default.conf
- static_volume:/app/static
ports:
- "80:80"
depends_on:
- web
web:
container_name: web
build: .
env_file: .env
ports:
- "5000:5000"
command: >
sh -c " python manage.py makemigrations && python manage.py migrate &&
manage.py runserver 0.0.0.0:5000"
volumes:
- .:/app
- static_volume:/app/static
depends_on:
- db
db:
container_name: core_db
image: postgres:15
env_file: .env
environment:
- POSTGRES_USER=${DB_USER}
- POSTGRES_PASSWORD=${DB_PASS}
- POSTGRES_DB=${DB_NAME}
volumes:
- postgres_data:/var/lib/postgresql/data/
volumes:
static_volume:
postgres_data:
I changed the web of my docker-compose.yml file:
web:
tty: true
container_name: web
build: .
restart: always
env_file: .env
ports:
- "5000:5000"
command: >
sh -c " python3 /app/manage.py makemigrations && python3 /app/manage.py migrate && python3 /app/manage.py runserver 0.0.0.0:5000"
volumes:
- .:/app
- static_volume:/app/static
depends_on:
- db
Basically, I added tty: true and changed command to:
sh -c " python3 /app/manage.py makemigrations && python3 /app/manage.py migrate && python3 /app/manage.py runserver 0.0.0.0:5000"
What I believe was happening:
I did not specify the folder of the location of the manage.py, which is what I believe I set in volumes to be /app. Thus I had to state in the command its location, feel free to correct me on this.
This made it functional and allowed me to access the backend and its postgres database.
Google solutions does not help, I feel like the problem is in me using Gunicorn as local server. I just cant get my volume to sync and update with me changing local files, how do I do that? Force re-build volume ever ytime sounds like something highly inefficient
Tried used Watchtower but had no luck as well
compose.yml
services:
back:
container_name: blog-django
build: ./blog-master
command: gunicorn blog.wsgi:application --bind 0.0.0.0:8000
expose:
- 8000
links:
- db
volumes:
- .:/app
- blog-django:/usr/src/app/
- blog-static:/usr/src/app/static
env_file: ./.env
depends_on:
db:
condition: service_healthy
nginx:
container_name: blog-nginx
build: ./nginx/
ports:
- "1337:80"
volumes:
- blog-static:/usr/src/app/static
links:
- back
depends_on:
- back
db:
container_name: blog-db
image: postgres:14
restart: always
expose:
- "5432"
environment:
- POSTGRES_DB=docker
- POSTGRES_USER=docker
- POSTGRES_PASSWORD=docker
ports:
- "5432:5432"
volumes:
- pgdata:/var/lib/postgresql/data/
healthcheck:
test: ["CMD-SHELL", "pg_isready -U docker"]
interval: 5s
timeout: 5s
retries: 5
mailhog:
container_name: mailhog
image: mailhog/mailhog
#logging:
# driver: 'none' # disable saving logs
expose:
- 1025
ports:
- 1025:1025 # smtp server
- 8025:8025 # web ui
volumes:
blog-django:
blog-static:
pgdata:
Dockerfile
FROM python:3.9.6-alpine
WORKDIR /usr/src/app/
# set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
# install psycopg2 dependencies
RUN apk update \
&& apk add postgresql-dev gcc python3-dev musl-dev
RUN pip install --upgrade pip
RUN apk update \
&& apk add postgresql-dev gcc python3-dev musl-dev
COPY requirements.txt .
RUN pip install -r requirements.txt
COPY . .
I have a .sql file which I'd like to seed my django + postgres app with on build. That way I'll have some data in my app during development.
Here's my docker stuff:
Dockerfile
FROM python:3
ENV PYTHONUNBUFFERED=1
WORKDIR /code
COPY requirements.txt /code/
RUN pip3 install -r requirements.txt
COPY . /code/
docker-compose.yml
version: "3.9"
services:
db:
image: postgres
volumes:
- ./data/db:/var/lib/postgresql/data
environment:
- POSTGRES_DB=postgres
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=postgres
web:
build: .
command: python manage.py runserver 0.0.0.0:8000
volumes:
- .:/code
ports:
- "8000:8000"
depends_on:
- db
Django supports this usecase with fixtures: https://docs.djangoproject.com/en/3.2/howto/initial-data/
You can serialize your .sql database into a json file and feed that during build with the loaddata command.
I don't achieve to communicate with my database postgres using Docker and Django. Here is my docker-compose.yml :
version: '3'
services:
web:
container_name: web
build:
context: ./web
dockerfile: Dockerfile
command: python manage.py runserver 0.0.0.0:8000
volumes:
- ./web/:/usr/src/web/
ports:
- 8000:8000
- 3000:3000
- 35729:35729
env_file:
- database.env
stdin_open: true
depends_on:
- database
database:
container_name: database
image: postgres
volumes:
- database-data:/var/lib/postgresql/data/
ports:
- 5432:5432
volumes:
database-data:
Here is my database.env :
# database.env
POSTGRES_USERNAME=admin
POSTGRES_PASSWORD=pass
POSTGRES_DBNAME=db
POSTGRES_HOST=database
POSTGRES_PORT=5432
PGUSER=admin
PGPASSWORD=pass
PGDATABASE=db
PGHOST=database
PGPORT=5432
DATABASE=db
SQL_HOST=database
SQL_PORT=5432
And here is my Dockerfile :
# pull official base image
FROM python:3.8.3-alpine
# set work directory
WORKDIR /usr/src/web
# set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
# install psycopg2 dependencies
RUN apk update \
&& apk add postgresql-dev gcc python3-dev musl-dev
RUN apk add zlib-dev jpeg-dev gcc musl-dev
# install nodejs
RUN apk add --update nodejs nodejs-npm
# copy project
ADD . .
# install dependencies
RUN pip install --upgrade pip
RUN pip install -r requirements.txt
# run entrypoint.sh
ENTRYPOINT ["sh", "/usr/src/web/entrypoint.sh"]
And there my entrypoint.sh :
#!/bin/sh
if [ "$DATABASE" = "db" ]
then
echo "Waiting for postgres..."
while ! nc -z $SQL_HOST $SQL_PORT; do
sleep 10
done
echo "PostgreSQL started"
fi
exec "$#"
I build the docker using that : docker-compose up -d --build
Then I type that : docker-composexec web npm start --prefix ./front/ .
I can access to the frontent : http://localhost:3000
But when I do docker logs database I got that :
2021-01-18 06:31:49.207 UTC [1] LOG: database system is ready to accept connections
2021-01-18 06:31:51.640 UTC [32] FATAL: password authentication failed for user "admin"
2021-01-18 06:31:51.640 UTC [32] DETAIL: Role "admin" does not exist.
Connection matched pg_hba.conf line 99: "host all all all md5"
Here is the status :
37ee3e314d52 web "sh /usr/src/web/ent…" About a minute ago Up About a minute 0.0.0.0:3000->3000/tcp, 0.0.0.0:8000->8000/tcp, 5432/tcp web
65dfeae57a94 postgres "docker-entrypoint.s…" About a minute ago Up About a minute 0.0.0.0:5432->5432/tcp database
Coud you help me ?
Thank you very much !
It seems like the postgres user you are using doesn't exist. You can add some environment variables to database docker-compose to create those (you probably need to create the database, too), Or you can write some script to create those for the first time.
version: '3'
services:
web:
container_name: web
build:
context: ./web
dockerfile: Dockerfile
command: python manage.py runserver 0.0.0.0:8000
volumes:
- ./web/:/usr/src/web/
ports:
- 8000:8000
- 3000:3000
- 35729:35729
env_file:
- database.env
stdin_open: true
depends_on:
- database
database:
container_name: database
image: postgres
volumes:
- database-data:/var/lib/postgresql/data/
ports:
- 5432:5432
environment:
- POSTGRES_USER=admin
- POSTGRES_PASSWORD=pass
- POSTGRES_DB=db
volumes:
database-data:
About postgres image envs you can check this link .
I'm trying to dockerize project written in django and postgresql. What I've already done:
I have environment variables stores in env_file:
SECRET_KEY=value
DEBUG=value
ALLOWED_HOSTS=['192.168.99.100']
DB_NAME=postgres
DB_USER=postgres
DB_PASSWORD=postgres
DB_HOST=db
DB_PORT=5432
My Dockerfile:
FROM python:3.7-stretch
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
COPY requirements.txt /code/
WORKDIR /code/
RUN pip install -r requirements.txt
COPY . /code/
My docker-compose.yml file:
version: '3'
services:
db:
image: postgres:11-alpine
restart: always
volumes:
- postgres_data:/var/lib/postgresql/data/
environment:
POSTGRES_PASSWORD: postgres
container_name: "my_postgres"
ports:
- "5432:5432"
web:
build: .
command: python /code/cameo/manage.py runserver 0.0.0.0:8000
volumes:
- .:/code/
env_file:
- env_file
ports:
- "8000:8000"
depends_on:
- db
volumes:
postgres_data:
Please help, I don't know what I'm doing wrong.
If you are running Docker on Windows, some files may have been corrupted.
The following command worked for me :
"docker-compose down --rmi all"