Initial commit

Working example of empty django app with gunicorn, nginx, and
postgersql. Source: https://blog.bitsacm.in/django-on-docker/

.gitignore

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+project.env
+venv
+__pycache__
+*.pyc

djangoproject/Dockerfile

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+# Use the official Python image from the Docker Hub
+FROM python:3
+
+# These two environment variables prevent __pycache__/ files.
+ENV PYTHONUNBUFFERED 1
+ENV PYTHONDONTWRITEBYTECODE 1
+
+# We need to install netcat (used by entrypoint.sh)
+# as it is not installed by default
+RUN apt-get update && apt-get install -y netcat
+
+# Create an app user in the app group. 
+RUN useradd --user-group --create-home --no-log-init --shell /bin/bash app
+
+ENV APP_HOME=/home/app/web
+
+# Create the staticfiles directory. This avoids permission errors. 
+RUN mkdir -p $APP_HOME/staticfiles
+RUN chown app:app $APP_HOME/staticfiles
+
+# Change the workdir.
+WORKDIR $APP_HOME
+
+# Copy the requirements.txt file.
+COPY ./requirements.txt $APP_HOME
+
+# Upgrade pip
+RUN pip install --upgrade pip
+
+# Install the requirements.
+RUN pip install -r requirements.txt
+
+# Copy the rest of the code. 
+COPY . $APP_HOME
+
+USER app:app
+
+ENTRYPOINT ["/home/app/web/entrypoint.sh"]
+

djangoproject/djangoproject/asgi.py

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+"""
+ASGI config for djangoproject project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'djangoproject.settings')
+
+application = get_asgi_application()

djangoproject/djangoproject/local_settings.py

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+import os
+
+
+class Database:
+    NAME = os.getenv('POSTGRES_DB')
+    USER = os.getenv('POSTGRES_USER')
+    PASSWORD = os.getenv('POSTGRES_PASSWORD')
+    HOST = os.getenv('DATABASE_HOST')
+    PORT = os.getenv('DATABASE_PORT')
+
+
+class Secrets:
+    SECRET_KEY = 'ladm3zbrp7y$c9h$-jz+(@0)d*zpppges+to67z-pg$wbzcqm='

djangoproject/djangoproject/settings.py

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+"""
+Django settings for djangoproject project.
+
+Generated by 'django-admin startproject' using Django 3.1.5.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/3.1/ref/settings/
+"""
+
+import os
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+from djangoproject.local_settings import Database, Secrets
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/3.1/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = Secrets.SECRET_KEY
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = ["localhost", "127.0.0.1", "0.0.0.0"]
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'djangoproject.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'djangoproject.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/3.1/ref/settings/#databases
+
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.postgresql",
+        "NAME": Database.NAME,
+        "USER": Database.USER,
+        "PASSWORD": Database.PASSWORD,
+        "HOST": Database.HOST,
+        "PORT": Database.PORT,
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/3.1/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/3.1/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_L10N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/3.1/howto/static-files/
+
+STATIC_URL = '/static/'
+STATIC_ROOT = os.path.join(BASE_DIR, "staticfiles")

djangoproject/djangoproject/urls.py

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+"""djangoproject URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/3.1/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+]

djangoproject/djangoproject/wsgi.py

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+"""
+WSGI config for djangoproject project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'djangoproject.settings')
+
+application = get_wsgi_application()

djangoproject/entrypoint.sh

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+#!/bin/sh
+if [ "$DATABASE" = "postgres" ]; then
+    echo "Waiting for postgres..."
+
+    while ! nc -z $DATABASE_HOST $DATABASE_PORT; do
+      sleep 0.1
+    done
+
+    echo "PostgreSQL started"
+fi
+
+# Make migrations and migrate the database.
+echo "Making migrations and migrating the database"
+python manage.py makemigrations main --noinput 
+python manage.py migrate --noinput 
+echo "collectiong static files"
+python manage.py collectstatic --noinput
+
+exec "$@"

djangoproject/manage.py

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+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'djangoproject.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()

djangoproject/requirements.txt

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+appdirs==1.4.3
+asgiref==3.3.1
+CacheControl==0.12.6
+certifi==2019.11.28
+chardet==3.0.4
+colorama==0.4.3
+contextlib2==0.6.0
+distlib==0.3.0
+distro==1.4.0
+Django==3.1.5
+gunicorn==20.0.4
+html5lib==1.0.1
+idna==2.8
+ipaddr==2.2.0
+lockfile==0.12.2
+msgpack==0.6.2
+packaging==20.3
+pep517==0.8.2
+progress==1.5
+psycopg2-binary==2.8.6
+pyparsing==2.4.6
+pytoml==0.1.21
+pytz==2020.5
+requests==2.22.0
+retrying==1.3.3
+six==1.14.0
+sqlparse==0.4.1
+urllib3==1.25.8
+webencodings==0.5.1

docker-compose.yml

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+version: '3'
+
+services:
+  db:
+    container_name: postgresdb
+    image: postgres:latest
+    restart: always
+    env_file:
+      - project.env
+    ports:
+      - 5432:5432
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+  web:
+    container_name: django
+    build: djangoproject/
+    command: >
+      gunicorn djangoproject.wsgi:application --bind 0.0.0.0:8000 --workers=4
+    env_file:
+      - project.env
+    expose:
+      - 8000
+    depends_on:
+      - db
+    volumes:
+      - staticfiles:/home/app/web/staticfiles
+  nginx:
+    container_name: nginx
+    image: nginx:mainline-alpine
+    restart: always
+    ports:
+      - 8888:80
+    volumes:
+      - ./nginx:/etc/nginx/conf.d
+      - staticfiles:/home/app/web/staticfiles
+    depends_on:
+      - web
+
+volumes:
+  postgres-data:
+  staticfiles:

nginx/nginx.conf

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+upstream djangoapp {
+	server django:8000;
+}
+
+server {
+	listen 80;
+    listen [::]:80;
+
+    location /static/ {
+    	alias /home/app/web/staticfiles/;
+    }
+    
+    location / {
+        proxy_pass http://djangoapp;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header Host $host;
+        proxy_redirect off;
+    }
+}

project.env.example

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+POSTGRES_USER=dbadmin
+POSTGRES_PASSWORD=verysecretdbpassword
+POSTGRES_DB=project_db
+DATABASE=postgres
+DATABASE_HOST=postgresdb
+DATABASE_PORT=5432