Docker Community Forums

Share and learn in the Docker community.

Docker in Django 2.0 and Postgresql not working (Windows 10 Home)


(Ralfillo) #1

I’ve been following this tutorial and I made some modifications, because I’m using virtualenv instead of pipenv, so I’ll be using a requirements.txt file to manage the dependencies.

It’s the first time that I’m trying a project with Docker.

https://wsvincent.com/django-docker-postgresql/

Dockerfile:

# Pull base image
FROM python:3.6-slim

# Set environment varibles
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1

# Set work directory
WORKDIR /code

# Install dependencies
RUN pip install --upgrade pip
ADD requirements.txt /code/
RUN pip install -r requirements.txt

# Copy project
COPY . /code/

docker-compsose.yml:

version: '3.6'

services:
  db:
    image: postgres:10.1-alpine
    volumes:
      - postgres_data:/var/lib/postgresql/data/
  web:
    build: .
    command: python /code/manage.py migrate --noinput
    command: python /code/manage.py runserver 0.0.0.0:8000
    volumes:
      - /code
    ports:
      - 8000:8000
    environment:
      - SECRET_KEY=changemeinprod
    depends_on:
      - db

volumes:
  postgres_data:

After running:

docker-compose up -d --build

And:

docker-compose up

Now it seems to be up and running but when I visit 127.0.0.1:8000 the site isn’t up.

The log:

(env) C:\Projects\dfb_mb_docker>docker-compose up
dfbmbdocker_db_1 is up-to-date
dfbmbdocker_web_1 is up-to-date
Attaching to dfbmbdocker_db_1, dfbmbdocker_web_1
db_1 | 2018-07-18 15:36:00.729 UTC [1] LOG: listening on IPv4 address “0.0.0.0”, port 5432
db_1 | 2018-07-18 15:36:00.730 UTC [1] LOG: listening on IPv6 address “::”, port 5432
db_1 | 2018-07-18 15:36:00.759 UTC [1] LOG: listening on Unix socket “/var/run/postgresql/.s.PGSQL.5432”
db_1 | 2018-07-18 15:36:00.832 UTC [17] LOG: database system was shut down at 2018-07-18 15:21:50 UTC
db_1 | 2018-07-18 15:36:00.846 UTC [1] LOG: database system is ready to accept connections
db_1 | 2018-07-18 15:37:02.431 UTC [1] LOG: received smart shutdown request
db_1 | 2018-07-18 15:37:02.443 UTC [1] LOG: worker process: logical replication launcher (PID 23) exited with exit code 1
db_1 | 2018-07-18 15:37:02.444 UTC [18] LOG: shutting down
db_1 | 2018-07-18 15:37:02.514 UTC [1] LOG: database system is shut down
db_1 | 2018-07-18 15:37:14.596 UTC [1] LOG: listening on IPv4 address “0.0.0.0”, port 5432
db_1 | 2018-07-18 15:37:14.596 UTC [1] LOG: listening on IPv6 address “::”, port 5432
db_1 | 2018-07-18 15:37:14.626 UTC [1] LOG: listening on Unix socket “/var/run/postgresql/.s.PGSQL.5432”
db_1 | 2018-07-18 15:37:14.683 UTC [17] LOG: database system was shut down at 2018-07-18 15:37:02 UTC
db_1 | 2018-07-18 15:37:14.696 UTC [1] LOG: database system is ready to accept connections
db_1 | 2018-07-18 15:38:36.294 UTC [1] LOG: received smart shutdown request
db_1 | 2018-07-18 15:38:36.305 UTC [1] LOG: worker process: logical replication launcher (PID 23) exited with exit code 1
db_1 | 2018-07-18 15:38:36.306 UTC [18] LOG: shutting down
db_1 | 2018-07-18 15:38:36.393 UTC [1] LOG: database system is shut down
db_1 | 2018-07-18 15:40:01.343 UTC [1] LOG: listening on IPv4 address “0.0.0.0”, port 5432
db_1 | 2018-07-18 15:40:01.343 UTC [1] LOG: listening on IPv6 address “::”, port 5432
db_1 | 2018-07-18 15:40:01.367 UTC [1] LOG: listening on Unix socket “/var/run/postgresql/.s.PGSQL.5432”
db_1 | 2018-07-18 15:40:01.459 UTC [17] LOG: database system was shut down at 2018-07-18 15:38:36 UTC
db_1 | 2018-07-18 15:40:01.473 UTC [1] LOG: database system is ready to accept connections
db_1 | 2018-07-18 15:42:16.717 UTC [1] LOG: received smart shutdown request
db_1 | 2018-07-18 15:42:16.740 UTC [1] LOG: worker process: logical replication launcher (PID 23) exited with exit code 1
db_1 | 2018-07-18 15:42:16.741 UTC [18] LOG: shutting down
db_1 | 2018-07-18 15:42:16.816 UTC [1] LOG: database system is shut down
db_1 | 2018-07-18 15:42:40.411 UTC [1] LOG: listening on IPv4 address “0.0.0.0”, port 5432
db_1 | 2018-07-18 15:42:40.411 UTC [1] LOG: listening on IPv6 address “::”, port 5432
db_1 | 2018-07-18 15:42:40.429 UTC [1] LOG: listening on Unix socket “/var/run/postgresql/.s.PGSQL.5432”
db_1 | 2018-07-18 15:42:40.495 UTC [17] LOG: database system was shut down at 2018-07-18 15:42:16 UTC
db_1 | 2018-07-18 15:42:40.505 UTC [1] LOG: database system is ready to accept connections
web_1 | /usr/local/lib/python3.6/site-packages/psycopg2/init.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in
order to keep installing from binary please use “pip install psycopg2-binary” instead. For details see: initd
ary-install-from-pypi>.
web_1 | “”")
web_1 | /usr/local/lib/python3.6/site-packages/psycopg2/init.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in
order to keep installing from binary please use “pip install psycopg2-binary” instead. For details see: nitd.psycopg/docs/install.html
ary-install-from-pypi>.
web_1 | “”")
web_1 | Performing system checks…
web_1 |
web_1 | System check identified no issues (0 silenced).
web_1 | July 18, 2018 - 16:08:39
web_1 | Django version 2.0.6, using settings ‘dfb_mb.settings’
web_1 | Starting development server at 0.0.0.0:8000
web_1 | Quit the server with CONTROL-C.

There’s no errors and it looks like the app is live, but I can see the website in Chrome. Could you please help me out.

I appreciate your help!


#2

Hey! I don’t know if it’s too late . But i was having the same problem
And instead of visiting 0.0.0.0:8000 , i visited the ip address that appears on Docker terminal (in my case was 192.168.X.X ) and the port that i specified in the Docker compose

yourIPfromDocker:port

Hope it works.


(Gary Forghetti) #3

To add some more context.

In the [Internet Protocol Version 4](https://en.wikipedia.org/wiki/Internet_Protocol_Version_4), the address **0.0.0.0** is a non-routable meta-address used to designate an invalid, unknown or non-applicable target. This address is assigned specific meanings in a number of contexts.

In the context of servers, 0.0.0.0 can mean "all IPv4 addresses on the local machine". If a host has two IP addresses, 192.168.1.1 and 10.1.2.1, and a server running on the host is configured to listen on 0.0.0.0, it will be reachable at both of those IP addresses. 

So your app cannot be accessed by specifying the IP address 0.0.0.0 in a URL.
But it can be accessed by all IPv4 addresses on the local machine.