Step 3-2 - Simulating the production environment

config/production.json

@@ -0,0 +1,34 @@
+[
+  {
+    "name": "FLASK_ENV",
+    "value": "production"
+  },
+  {
+    "name": "FLASK_CONFIG",
+    "value": "production"
+  },
+  {
+    "name": "POSTGRES_DB",
+    "value": "postgres"
+  },
+  {
+    "name": "POSTGRES_USER",
+    "value": "postgres"
+  },
+  {
+    "name": "POSTGRES_HOSTNAME",
+    "value": "localhost"
+  },
+  {
+    "name": "POSTGRES_PORT",
+    "value": "5432"
+  },
+  {
+    "name": "POSTGRES_PASSWORD",
+    "value": "postgres"
+  },
+  {
+    "name": "APPLICATION_DB",
+    "value": "application"
+  }
+]

docker/Dockerfile.production

@@ -0,0 +1,10 @@
+FROM python:3
+
+ENV PYTHONUNBUFFERED 1
+
+RUN mkdir /opt/code
+RUN mkdir /opt/requirements
+WORKDIR /opt/code
+
+ADD requirements /opt/requirements
+RUN pip install -r /opt/requirements/production.txt

docker/production.yml

@@ -0,0 +1,33 @@
+version: '3.4'
+
+services:
+  db:
+    image: postgres
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB}
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+    ports:
+      - "${POSTGRES_PORT}:5432"
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+  web:
+    build:
+      context: ${PWD}
+      dockerfile: docker/Dockerfile.production
+    environment:
+      FLASK_ENV: ${FLASK_ENV}
+      FLASK_CONFIG: ${FLASK_CONFIG}
+      APPLICATION_DB: ${APPLICATION_DB}
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_HOSTNAME: "db"
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_PORT: ${POSTGRES_PORT}
+    command: gunicorn -w 4 -b 0.0.0.0 wsgi:app
+    volumes:
+      - ${PWD}:/opt/code
+    ports:
+      - "8000:8000"
+
+volumes:
+  pgdata:

requirements/production.txt

@@ -2,3 +2,4 @@ Flask
 flask-sqlalchemy
 psycopg2
 flask-migrate
+gunicorn