part 1

docker-compose-prod.yml

@@ -0,0 +1,37 @@
+version: '3.7'
+
+services:
+
+  users:
+    build:
+      context: ./services/users
+      dockerfile: Dockerfile-prod
+    expose:
+      - 5000
+    environment:
+      - FLASK_ENV=production
+      - APP_SETTINGS=project.config.ProductionConfig
+      - DATABASE_URL=postgres://postgres:postgres@users-db:5432/users_prod
+      - DATABASE_TEST_URL=postgres://postgres:postgres@users-db:5432/users_test
+    depends_on:
+      - users-db
+
+  users-db:
+    build:
+      context: ./services/users/project/db
+      dockerfile: Dockerfile
+    expose:
+      - 5432
+    environment:
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=postgres
+
+  nginx:
+    build:
+      context: ./services/nginx
+      dockerfile: Dockerfile-prod
+    restart: always
+    ports:
+      - 80:80
+    depends_on:
+      - users

docker-compose.yml

@@ -0,0 +1,39 @@
+version: '3.7'
+
+services:
+
+  users:
+    build:
+      context: ./services/users
+      dockerfile: Dockerfile
+    volumes:
+      - './services/users:/usr/src/app'
+    ports:
+      - 5001:5000
+    environment:
+      - FLASK_ENV=development
+      - APP_SETTINGS=project.config.DevelopmentConfig
+      - DATABASE_URL=postgres://postgres:postgres@users-db:5432/users_dev
+      - DATABASE_TEST_URL=postgres://postgres:postgres@users-db:5432/users_test
+    depends_on:
+      - users-db
+
+  users-db:
+    build:
+      context: ./services/users/project/db
+      dockerfile: Dockerfile
+    ports:
+      - 5436:5432
+    environment:
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=postgres
+
+  nginx:
+    build:
+      context: ./services/nginx
+      dockerfile: Dockerfile
+    restart: always
+    ports:
+      - 80:80
+    depends_on:
+      - users

services/nginx/Dockerfile

@@ -0,0 +1,4 @@
+FROM nginx:1.15.9-alpine
+
+RUN rm /etc/nginx/conf.d/default.conf
+COPY /dev.conf /etc/nginx/conf.d

services/nginx/Dockerfile-prod

@@ -0,0 +1,4 @@
+FROM nginx:1.15.9-alpine
+
+RUN rm /etc/nginx/conf.d/default.conf
+COPY /prod.conf /etc/nginx/conf.d

services/nginx/dev.conf

@@ -0,0 +1,14 @@
+server {
+
+  listen 80;
+
+  location / {
+    proxy_pass        http://users:5000;
+    proxy_redirect    default;
+    proxy_set_header  Host $host;
+    proxy_set_header  X-Real-IP $remote_addr;
+    proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header  X-Forwarded-Host $server_name;
+  }
+
+}

services/nginx/prod.conf

@@ -0,0 +1,14 @@
+server {
+
+  listen 80;
+
+  location / {
+    proxy_pass        http://users:5000;
+    proxy_redirect    default;
+    proxy_set_header  Host $host;
+    proxy_set_header  X-Real-IP $remote_addr;
+    proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header  X-Forwarded-Host $server_name;
+  }
+
+}

services/users/.dockerignore

@@ -0,0 +1,4 @@
+env
+.dockerignore
+Dockerfile-dev
+Dockerfile-prod

services/users/Dockerfile

@@ -0,0 +1,25 @@
+# base image
+FROM python:3.7.2-alpine
+
+# install dependencies
+RUN apk update && \
+    apk add --virtual build-deps gcc python-dev musl-dev && \
+    apk add postgresql-dev && \
+    apk add netcat-openbsd
+
+# set working directory
+WORKDIR /usr/src/app
+
+# add and install requirements
+COPY ./requirements.txt /usr/src/app/requirements.txt
+RUN pip install -r requirements.txt
+
+# add entrypoint.sh
+COPY ./entrypoint.sh /usr/src/app/entrypoint.sh
+RUN chmod +x /usr/src/app/entrypoint.sh
+
+# add app
+COPY . /usr/src/app
+
+# run server
+CMD ["/usr/src/app/entrypoint.sh"]

services/users/Dockerfile-prod

@@ -0,0 +1,25 @@
+# base image
+FROM python:3.7.2-alpine
+
+# install dependencies
+RUN apk update && \
+    apk add --virtual build-deps gcc python-dev musl-dev && \
+    apk add postgresql-dev && \
+    apk add netcat-openbsd
+
+# set working directory
+WORKDIR /usr/src/app
+
+# add and install requirements
+COPY ./requirements.txt /usr/src/app/requirements.txt
+RUN pip install -r requirements.txt
+
+# add entrypoint.sh
+COPY ./entrypoint.sh /usr/src/app/entrypoint-prod.sh
+RUN chmod +x /usr/src/app/entrypoint-prod.sh
+
+# add app
+COPY . /usr/src/app
+
+# run server
+CMD ["/usr/src/app/entrypoint-prod.sh"]

services/users/entrypoint-prod.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+echo "Waiting for postgres..."
+
+while ! nc -z users-db 5432; do
+  sleep 0.1
+done
+
+echo "PostgreSQL started"
+
+gunicorn -b 0.0.0.0:5000 manage:app

services/users/entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+echo "Waiting for postgres..."
+
+while ! nc -z users-db 5432; do
+  sleep 0.1
+done
+
+echo "PostgreSQL started"
+
+python manage.py run -h 0.0.0.0

services/users/manage.py

@@ -1,12 +1,41 @@
 # services/users/manage.py
 
 
+import sys
+import unittest
+
 from flask.cli import FlaskGroup
 
-from project import app
+from project import create_app, db
+from project.api.models import User
+
+app = create_app()
+cli = FlaskGroup(create_app=create_app)
+
+
+@cli.command('recreate_db')
+def recreate_db():
+    db.drop_all()
+    db.create_all()
+    db.session.commit()
+
+
+@cli.command('seed_db')
+def seed_db():
+    """Seeds the database."""
+    db.session.add(User(username='michael', email="hermanmu@gmail.com"))
+    db.session.add(User(username='michaelherman', email="michael@mherman.org"))
+    db.session.commit()
 
 
-cli = FlaskGroup(app)
+@cli.command()
+def test():
+    """Runs the tests without code coverage"""
+    tests = unittest.TestLoader().discover('project/tests', pattern='test*.py')
+    result = unittest.TextTestRunner(verbosity=2).run(tests)
+    if result.wasSuccessful():
+        return 0
+    sys.exit(result)
 
 
 if __name__ == '__main__':

services/users/project/__init__.py

@@ -1,25 +1,35 @@
 # services/users/project/__init__.py
 
 
-from flask import Flask, jsonify
-from flask_restful import Resource, Api
+import os
 
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
 
-# instantiate the app
-app = Flask(__name__)
 
-api = Api(app)
+# instantiate the db
+db = SQLAlchemy()
 
-# set config
-app.config.from_object('project.config.DevelopmentConfig')  # new
 
+def create_app(script_info=None):
 
-class UsersPing(Resource):
-    def get(self):
-        return {
-        'status': 'success',
-        'message': 'pong!'
-    }
+    # instantiate the app
+    app = Flask(__name__)
 
+    # set config
+    app_settings = os.getenv('APP_SETTINGS')
+    app.config.from_object(app_settings)
 
-api.add_resource(UsersPing, '/users/ping')
+    # set up extensions
+    db.init_app(app)
+
+    # register blueprints
+    from project.api.users import users_blueprint
+    app.register_blueprint(users_blueprint)
+
+    # shell context for flask cli
+    @app.shell_context_processor
+    def ctx():
+        return {'app': app, 'db': db}
+
+    return app

services/users/project/api/__init__.py

@@ -0,0 +1 @@
+# services/users/project/api/__init__.py

services/users/project/api/models.py

@@ -0,0 +1,29 @@
+# services/users/project/api/models.py
+
+
+from sqlalchemy.sql import func
+
+from project import db
+
+
+class User(db.Model):
+
+    __tablename__ = 'users'
+
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    username = db.Column(db.String(128), nullable=False)
+    email = db.Column(db.String(128), nullable=False)
+    active = db.Column(db.Boolean(), default=True, nullable=False)
+    created_date = db.Column(db.DateTime, default=func.now(), nullable=False)
+
+    def __init__(self, username, email):
+        self.username = username
+        self.email = email
+
+    def to_json(self):
+        return {
+            'id': self.id,
+            'username': self.username,
+            'email': self.email,
+            'active': self.active
+        }

services/users/project/api/templates/index.html

@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Flask on Docker</title>
+    <!-- meta -->
+    <meta name="description" content="">
+    <meta name="author" content="">
+    <meta name="viewport" content="width=device-width,initial-scale=1">
+    <!-- styles -->
+    <link
+      href="//cdnjs.cloudflare.com/ajax/libs/bulma/0.7.4/css/bulma.min.css"
+      rel="stylesheet"
+    >
+    {% block css %}{% endblock %}
+  </head>
+  <body>
+    <div class="container">
+      <div class="column is-one-third">
+        <br>
+        <h1 class="title">All Users</h1>
+        <hr><br>
+        <form action="/" method="POST">
+          <div class="field">
+            <input
+              name="username" class="input"
+              type="text" placeholder="Enter a username" required>
+          </div>
+          <div class="field">
+            <input
+              name="email" class="input"
+              type="email" placeholder="Enter an email address" required>
+          </div>
+          <input
+            type="submit" class="button is-primary is-fullwidth"
+            value="Submit">
+        </form>
+        <br>
+        <hr>
+          {% if users %}
+            <ol>
+              {% for user in users %}
+                <li>{{user.username}}</li>
+              {% endfor %}
+            </ol>
+          {% else %}
+            <p>No users!</p>
+          {% endif %}
+        </div>
+      </div>
+    </div>
+    </script>
+    {% block js %}{% endblock %}
+  </body>
+</html>