Dockerize the project

.gitignore

@@ -0,0 +1,37 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+

Dockerfile

@@ -0,0 +1,16 @@
+FROM python:3.8-slim-buster
+RUN apt-get update -y && \
+    apt-get install -y python-pip python-dev && \
+    apt-get install -y libpq-dev && \
+    apt-get install -y postgresql-client
+
+WORKDIR /app
+COPY ./requirements.txt /app/requirements.txt
+RUN pip install -r requirements.txt
+
+COPY ./start.sh /app/start.sh
+RUN chmod +x /app/start.sh
+
+
+EXPOSE 8000
+ENV PYTHONPATH='.'

docker-compose.yml

@@ -0,0 +1,26 @@
+version: '3'
+
+volumes:
+  local_postgres_data: {}
+  local_postgres_data_backups: {}
+
+services:
+  db:
+    image: postgres
+    volumes:
+      - local_postgres_data:/var/lib/postgresql/data
+      - local_postgres_data_backups:/backups
+    env_file:
+      - .env
+
+  web:
+    build: .
+    command: ./start.sh
+    volumes:
+      - .:/app
+    ports:
+      - "8000:8000"
+    depends_on:
+      - db
+    env_file:
+      - .env

requirements.txt

@@ -1,2 +1,3 @@
 ansible==2.9.9
 Django==3.0.6
+psycopg2==2.8.5

sample/settings.py

@@ -75,8 +75,12 @@
 
 DATABASES = {
     'default': {
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': 'sample',
+        'USER': 'postgres',
+        'PASSWORD': os.environ['POSTGRES_PASSWORD'],
+        'HOST': 'db',
+        'PORT': 5432,
     }
 }
 

start.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+RETRIES=5
+until PGPASSWORD="$POSTGRES_PASSWORD" psql -h db -U "$POSTGRES_USER" -d "$POSTGRES_DB" -c "select 1" || [ $RETRIES -eq 0 ]; do
+  echo "Waiting for postgres server, $((RETRIES)) remaining attempts..."
+  RETRIES=$((RETRIES-=1))
+  sleep 1
+done
+
+python manage.py migrate
+
+superuser_name=admin
+[email protected]
+
+script=$(cat <<END
+from django.contrib.auth import get_user_model
+
+User = get_user_model()  # get the currently active user model,
+
+User.objects.filter(username='admin').exists() or User.objects.create_superuser('admin', '$superuser_email', '$SUPERUSER_PASSWORD')
+END
+)
+
+
+echo "$script" | python manage.py shell
+python manage.py runserver 0.0.0.0:8000