adding exercise for docker compose

Teil1/app/Dockerfile

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+# Example of Dockerfile
+
+FROM python:3.8.5-alpine3.12
+
+WORKDIR /app
+
+EXPOSE 5000
+ENV FLASK_APP=app.py
+
+COPY . /app
+RUN pip install -r requirements.txt
+
+ENTRYPOINT [ "flask"]
+CMD [ "run", "--host=0.0.0.0" ]

Teil1/app/app.py

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+from flask import Flask, request, jsonify, render_template
+import mysql.connector
+
+app = Flask(__name__)
+
+def employee_data():
+    # Connect to MySQL database
+    conn = mysql.connector.connect(
+      host='db',  # Use the IP address or hostname of the MySQL container
+      port='3306',  # MySQL port
+      user='root',  # MySQL username
+      password='root_password',  # MySQL password
+      database='employees'  # Name of the database
+    )
+    
+    # Create a cursor object to execute SQL commands
+    cursor = conn.cursor()
+
+    cursor.execute('SELECT Employee_Name, Title FROM employee_data')
+    results = cursor.fetchall()
+    cursor.close()
+    conn.close()
+    return results
+
+# Endpoint to add a new entry to the database
+@app.route('/add', methods=['POST'])
+def add_entry():
+    # Connect to MySQL database
+    conn = mysql.connector.connect(
+      host='db',  # Use the IP address or hostname of the MySQL container
+      port='3306',  # MySQL port
+      user='root',  # MySQL username
+      password='root_password',  # MySQL password
+      database='employees'  # Name of the database
+    )
+    
+    # Create a cursor object to execute SQL commands
+    cursor = conn.cursor()
+    
+    # Get data from request
+    data = request.get_json()
+    employee_name = data.get('employee_name')
+    title = data.get('title')
+
+    # SQL query to insert data into the employee_data table
+    sql_query = "INSERT INTO employee_data (Employee_Name, Title) VALUES (%s, %s)"
+    
+    try:
+        # Execute the SQL query
+        cursor.execute(sql_query, (employee_name, title))
+        # Commit the transaction
+        conn.commit()
+        cursor.close()
+        conn.close()
+        return jsonify({'message': 'Entry added successfully'}), 200
+    except Exception as e:
+        # Rollback in case of any error
+        conn.rollback()
+        cursor.close()
+        conn.close()
+        return jsonify({'error': str(e)}), 500
+
+# Endpoint to list all entries in the database
+@app.route('/entries', methods=['GET'])
+def get_entries():
+    # Connect to MySQL database
+    conn = mysql.connector.connect(
+      host='db',  # Use the IP address or hostname of the MySQL container
+      port='3306',  # MySQL port
+      user='root',  # MySQL username
+      password='root_password',  # MySQL password
+      database='employees'  # Name of the database
+    )
+    
+    # Create a cursor object to execute SQL commands
+    cursor = conn.cursor()
+    # SQL query to select all entries from the employee_data table
+    sql_query = "SELECT * FROM employee_data"
+    
+    # Execute the SQL query
+    cursor.execute(sql_query)
+    # Fetch all entries
+    entries = cursor.fetchall()
+    
+    # Convert entries to JSON format
+    entries_json = [{'Employee_Name': entry[0], 'Title': entry[1]} for entry in entries]
+    cursor.close()
+    conn.close()
+    return jsonify(entries_json), 200
+
+@app.route('/')
+def index():
+    #return jsonify({'Employee Data': employee_data()})
+    entries = employee_data()
+    return render_template('index.html', entries=entries)
+    #return "Hello world"
+
+if __name__ == '__main__':
+    #app.run(debug = True, host='0.0.0.0')
+    app.run()

Teil1/app/requirements.txt

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+Flask
+mysql-connector

Teil1/app/templates/index.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>MySQL Database Entries</title>
+    <style>
+        table {
+            border-collapse: collapse;
+            width: 100%;
+        }
+        th, td {
+            border: 1px solid #dddddd;
+            text-align: left;
+            padding: 8px;
+        }
+    </style>
+</head>
+<body>
+    <h1>SQLite Database Entries</h1>
+    <table>
+        <tr>
+            <th>Name</th>
+            <th>Position</th>
+            <!-- Add more table headers if needed -->
+        </tr>
+        {% for entry in entries %}
+        <tr>
+            <td>{{ entry[0] }}</td>
+            <td>{{ entry[1] }}</td>
+            <!-- Access more columns if needed -->
+        </tr>
+        {% endfor %}
+    </table>
+</body>
+</html>
+

Teil1/db/Dockerfile

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+# Use the official MySQL image from Docker Hub
+FROM mysql:latest
+
+# Set environment variables
+ENV MYSQL_ROOT_PASSWORD=root_password
+ENV MYSQL_DATABASE=employees
+
+# Copy the SQL initialization script into the container
+COPY init.sql /docker-entrypoint-initdb.d/
+
+# Expose port 3306 to allow external connections to the database
+EXPOSE 3306

Teil1/db/init.sql

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+CREATE DATABASE employees;
+USE employees;
+
+
+CREATE TABLE employee_data (
+  Employee_Name VARCHAR(50),
+  Title VARCHAR(50)
+);
+
+
+INSERT INTO employee_data
+  (Employee_Name, Title)
+VALUES
+  ('Amit Khanna', 'Manager'),
+  ('Anjali Gupta', 'Engineer');