Files to be changed in order to Dockerise a Django application for deployment on Divio

dockerise-for-divio.txt

git@github.com:divio/demosite.git

Dockerfile
===========

FROM python:3.8
WORKDIR /app
COPY . /app
RUN pip install -r requirements.txt
RUN python manage.py collectstatic --noinput
CMD uwsgi --http=0.0.0.0:80 --module=demosite.wsgi

#alternatives
CMD gunicorn --bind=0.0.0.0:80 --forwarded-allow-ips="*" demosite.wsgi
CMD uvicorn --host=0.0.0.0 --port=80 demosite.asgi:application


requirements.txt
================

django>=3.1,<3.2

dj-database-url==0.5.0
django-storage-url==0.5.0
whitenoise==5.2.0
boto3==1.14.49
psycopg2==2.8.5
uwsgi==2.0.19.1

# alternatives
mysqlclient==2.0.1
uvicorn==0.11.8
gunicorn==20.0.4


docker-compose.yml
==================

version: "2.4"
services:
  web:
    # the application's web service (container) will use an image based on our Dockerfile
    build: "."
    # map the internal port 80 to port 8000 on the host
    ports:
      - "8000:80"
    # map the host directory to app (which allows us to see and edit files inside the container)
    volumes:
      - ".:/app:rw"
      - "./data:/data:rw"
    # the default command to run wheneve the container is launched
    command: python manage.py runserver 0.0.0.0:80
    # the URL 'postgres' or 'mysql' will point to the application's db service
    links:
      - "database_default"
    env_file: .env-local

  database_default:
    image: postgres:9.6-alpine
    environment:
      POSTGRES_DB: "db"
      POSTGRES_HOST_AUTH_METHOD: "trust"
      SERVICE_MANAGER: "fsm-postgres"
    volumes:
      - ".:/app:rw"

# alternative
    image: mysql:5.7
    environment:
      MYSQL_DATABASE: "db"
      MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
      SERVICE_MANAGER: "fsm-mysql"
    volumes:
      - ".:/app:rw"
      - "./data/db:/var/lib/mysql"
    healthcheck:
        test: "/usr/bin/mysql --user=root -h 127.0.0.1 --execute \"SHOW DATABASES;\""
        interval: 2s
        timeout: 20s
        retries: 10
        
.env-local
==========

DATABASE_URL=postgres://postgres@database_default:5432/db
DEFAULT_STORAGE_DSN=file:///data/media/?url=%2Fmedia%2F
DJANGO_DEBUG=True
DOMAIN_ALIASES=localhost, 127.0.0.1
SECURE_SSL_REDIRECT=False

# alternative
DATABASE_URL=mysql://root@database_default:3306/db


settings
========

import os
import dj_database_url
from django_storage_url import dsn_configured_storage_class


# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.environ.get('SECRET_KEY', '<a string of random characters>')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = os.environ.get('DJANGO_DEBUG') == "True"

DIVIO_DOMAIN = os.environ.get('DOMAIN', '')
DIVIO_DOMAIN_ALIASES = [
    d.strip()
    for d in os.environ.get('DOMAIN_ALIASES', '').split(',')
    if d.strip()
]
ALLOWED_HOSTS = [DIVIO_DOMAIN] + DIVIO_DOMAIN_ALIASES

# Redirect to HTTPS by default, unless explicitly disabled
SECURE_SSL_REDIRECT = os.environ.get('SECURE_SSL_REDIRECT') != "False"


# Configure database using DATABASE_URL; fall back to sqlite in memory when no
# environment variable is available, e.g. during Docker build
DATABASE_URL = os.environ.get('DATABASE_URL', 'sqlite://:memory:')

DATABASES = {'default': dj_database_url.parse(DATABASE_URL)}


    'whitenoise.middleware.WhiteNoiseMiddleware',


STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'

# Media files
# DEFAULT_FILE_STORAGE is configured using DEFAULT_STORAGE_DSN

# read the setting value from the environment variable
DEFAULT_STORAGE_DSN = os.environ.get('DEFAULT_STORAGE_DSN')

# dsn_configured_storage_class() requires the name of the setting
DefaultStorageClass = dsn_configured_storage_class('DEFAULT_STORAGE_DSN')

# Django's DEFAULT_FILE_STORAGE requires the class name
DEFAULT_FILE_STORAGE = 'demosite.settings.DefaultStorageClass'

# only required for local file storage and serving, in development
MEDIA_URL = 'media/'
MEDIA_ROOT = os.path.join('/data/media/')


urls.py
=======

from django.conf import settings

if settings.DEBUG:
    from django.conf.urls.static import static
    urlpatterns.extend(static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT))


.gitignore
==========

# Python
*.pyc
*.pyo
db.sqlite3

# Django
/staticfiles

# Divio
.divio
/data.tar.gz
/data


# OS-specific patterns - add your own here
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes

Cloud
=====

* add services
* add migration command