Выполнена работа №3

cloudPractice/ansible/inventory.ini

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+[app_servers]
+vm1 ansible_host=<IP_VM1> ansible_user=ubuntu ansible_ssh_private_key_file=~/.ssh/id_rsa
+
+[db_servers]
+vm2 ansible_host=<IP_VM2> ansible_user=ubuntu ansible_ssh_private_key_file=~/.ssh/id_rsa
+
+[all:vars]
+ansible_python_interpreter=/usr/bin/python3

cloudPractice/ansible/playbook.yml

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+---
+- name: Install Docker on all VMs
+  hosts: all
+  become: true
+  roles:
+    - docker
+
+- name: Deploy MySQL on DB server
+  hosts: db_servers
+  become: true
+  roles:
+    - db
+
+- name: Deploy Todo App on App server
+  hosts: app_servers
+  become: true
+  vars:
+    db_host: "{{ hostvars[groups['db_servers'][0]]['ansible_host'] }}"
+  roles:
+    - app

cloudPractice/ansible/roles/app/files/docker-compose.yml

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+services:
+  app:
+    build: ./app
+    container_name: todo_app
+    restart: unless-stopped
+    ports:
+      - "5000:5000"
+    environment:
+      DB_HOST: "{{ db_host }}"
+      DB_USER: todo_user
+      DB_PASSWORD: todo_pass
+      DB_NAME: todo_db

cloudPractice/ansible/roles/app/tasks/main.yml

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+---
+- name: Create app directory on App server
+  file:
+    path: /opt/todo/app/templates
+    state: directory
+    owner: ubuntu
+    group: ubuntu
+    recurse: true
+
+- name: Copy App docker-compose
+  copy:
+    src: docker-compose.yml
+    dest: /opt/todo/docker-compose.yml
+    owner: ubuntu
+    group: ubuntu
+
+- name: Copy application files
+  copy:
+    src: "{{ item }}"
+    dest: /opt/todo/app/
+    owner: ubuntu
+    group: ubuntu
+  loop:
+    - app.py
+    - requirements.txt
+    - Dockerfile
+
+- name: Copy HTML template
+  copy:
+    src: index.html
+    dest: /opt/todo/app/templates/index.html
+    owner: ubuntu
+    group: ubuntu
+
+- name: Start Todo App with docker compose
+  community.docker.docker_compose_v2:
+    project_src: /opt/todo
+    state: present
+    build: always

cloudPractice/ansible/roles/db/files/docker-compose.yml

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+services:
+  db:
+    image: mysql:8.0
+    container_name: todo_db
+    restart: unless-stopped
+    environment:
+      MYSQL_ROOT_PASSWORD: root_pass
+      MYSQL_DATABASE: todo_db
+      MYSQL_USER: todo_user
+      MYSQL_PASSWORD: todo_pass
+    ports:
+      - "3306:3306"
+    volumes:
+      - db_data:/var/lib/mysql
+      - ./db/init.sql:/docker-entrypoint-initdb.d/init.sql
+
+volumes:
+  db_data:

cloudPractice/ansible/roles/db/files/init.sql

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+CREATE DATABASE IF NOT EXISTS todo_db;
+USE todo_db;
+
+CREATE TABLE IF NOT EXISTS todos (
+    id    INT AUTO_INCREMENT PRIMARY KEY,
+    title VARCHAR(255) NOT NULL,
+    done  TINYINT(1)   NOT NULL DEFAULT 0
+);

cloudPractice/ansible/roles/db/tasks/main.yml

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+---
+- name: Create app directory on DB server
+  file:
+    path: /opt/todo/db
+    state: directory
+    owner: ubuntu
+    group: ubuntu
+
+- name: Copy DB docker-compose
+  copy:
+    src: docker-compose.yml
+    dest: /opt/todo/docker-compose.yml
+    owner: ubuntu
+    group: ubuntu
+
+- name: Copy DB init script
+  copy:
+    src: init.sql
+    dest: /opt/todo/db/init.sql
+    owner: ubuntu
+    group: ubuntu
+
+- name: Start MySQL with docker compose
+  community.docker.docker_compose_v2:
+    project_src: /opt/todo
+    state: present

cloudPractice/ansible/roles/docker/tasks/main.yml

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+---
+- name: Install required packages
+  apt:
+    name:
+      - ca-certificates
+      - curl
+      - gnupg
+    state: present
+    update_cache: true
+
+- name: Add Docker GPG key
+  apt_key:
+    url: https://download.docker.com/linux/ubuntu/gpg
+    state: present
+
+- name: Add Docker repository
+  apt_repository:
+    repo: "deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable"
+    state: present
+
+- name: Install Docker CE and docker-compose-plugin
+  apt:
+    name:
+      - docker-ce
+      - docker-ce-cli
+      - containerd.io
+      - docker-compose-plugin
+    state: present
+    update_cache: true
+
+- name: Start and enable Docker
+  systemd:
+    name: docker
+    state: started
+    enabled: true
+
+- name: Add ubuntu user to docker group
+  user:
+    name: ubuntu
+    groups: docker
+    append: true

cloudPractice/app/Dockerfile

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+FROM python:3.12-alpine3.19
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+COPY . .
+CMD ["python", "app.py"]

cloudPractice/app/app.py

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+import os
+import time
+
+import mysql.connector
+from flask import Flask, redirect, render_template, request
+
+app = Flask(__name__)
+
+DB_CONFIG = {
+    "host": os.getenv("DB_HOST", "db"),
+    "port": int(os.getenv("DB_PORT", "3306")),
+    "user": os.getenv("DB_USER", "todo_user"),
+    "password": os.getenv("DB_PASSWORD", "todo_pass"),
+    "database": os.getenv("DB_NAME", "todo_db"),
+}
+
+
+def get_db():
+    for _ in range(10):
+        try:
+            return mysql.connector.connect(**DB_CONFIG)
+        except mysql.connector.Error:
+            time.sleep(3)
+    raise RuntimeError("Cannot connect to MySQL")
+
+
+@app.route("/")
+def index():
+    db = get_db()
+    cursor = db.cursor()
+    cursor.execute("SELECT id, title, done FROM todos ORDER BY id DESC")
+    todos = cursor.fetchall()
+    cursor.close()
+    db.close()
+    return render_template("index.html", todos=todos)
+
+
+@app.route("/add", methods=["POST"])
+def add():
+    title = request.form.get("title", "").strip()
+    if title:
+        db = get_db()
+        cursor = db.cursor()
+        cursor.execute("INSERT INTO todos (title, done) VALUES (%s, 0)", (title,))
+        db.commit()
+        cursor.close()
+        db.close()
+    return redirect("/")
+
+
+@app.route("/toggle/<int:todo_id>")
+def toggle(todo_id):
+    db = get_db()
+    cursor = db.cursor()
+    cursor.execute("UPDATE todos SET done = NOT done WHERE id = %s", (todo_id,))
+    db.commit()
+    cursor.close()
+    db.close()
+    return redirect("/")
+
+
+@app.route("/delete/<int:todo_id>")
+def delete(todo_id):
+    db = get_db()
+    cursor = db.cursor()
+    cursor.execute("DELETE FROM todos WHERE id = %s", (todo_id,))
+    db.commit()
+    cursor.close()
+    db.close()
+    return redirect("/")
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=5000)

cloudPractice/app/requirements.txt

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+flask==3.0.3
+mysql-connector-python==8.4.0

cloudPractice/app/templates/index.html

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+<!DOCTYPE html>
+<html lang="ru">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Todo — Кулаков Родион</title>
+  <style>
+    * { box-sizing: border-box; margin: 0; padding: 0; }
+    body { font-family: Arial, sans-serif; background: #f5f5f5; display: flex; justify-content: center; padding: 40px 16px; }
+    .card { background: white; border-radius: 12px; box-shadow: 0 2px 12px rgba(0,0,0,.1); width: 100%; max-width: 520px; padding: 32px; }
+    h1 { font-size: 1.6rem; margin-bottom: 24px; color: #222; }
+    form.add-form { display: flex; gap: 8px; margin-bottom: 24px; }
+    form.add-form input { flex: 1; padding: 10px 14px; border: 1px solid #ddd; border-radius: 8px; font-size: 1rem; }
+    form.add-form button { padding: 10px 20px; background: #4f46e5; color: white; border: none; border-radius: 8px; cursor: pointer; font-size: 1rem; }
+    form.add-form button:hover { background: #4338ca; }
+    ul { list-style: none; }
+    li { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid #f0f0f0; }
+    li:last-child { border-bottom: none; }
+    .title { flex: 1; font-size: 1rem; color: #333; }
+    .title.done { text-decoration: line-through; color: #aaa; }
+    a.btn { padding: 5px 12px; border-radius: 6px; font-size: 0.85rem; text-decoration: none; }
+    a.toggle { background: #e0e7ff; color: #4f46e5; }
+    a.toggle:hover { background: #c7d2fe; }
+    a.delete { background: #fee2e2; color: #dc2626; }
+    a.delete:hover { background: #fecaca; }
+    .empty { color: #aaa; text-align: center; padding: 20px 0; }
+  </style>
+</head>
+<body>
+  <div class="card">
+    <h1>Список задач</h1>
+    <form class="add-form" method="POST" action="/add">
+      <input type="text" name="title" placeholder="Новая задача..." required>
+      <button type="submit">Добавить</button>
+    </form>
+    <ul>
+      {% for id, title, done in todos %}
+      <li>
+        <span class="title {% if done %}done{% endif %}">{{ title }}</span>
+        <a class="btn toggle" href="/toggle/{{ id }}">{% if done %}Вернуть{% else %}Готово{% endif %}</a>
+        <a class="btn delete" href="/delete/{{ id }}">Удалить</a>
+      </li>
+      {% else %}
+      <li><span class="empty">Задач пока нет. Добавьте первую!</span></li>
+      {% endfor %}
+    </ul>
+  </div>
+</body>
+</html>

cloudPractice/db/init.sql

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+CREATE DATABASE IF NOT EXISTS todo_db;
+USE todo_db;
+
+CREATE TABLE IF NOT EXISTS todos (
+    id   INT AUTO_INCREMENT PRIMARY KEY,
+    title VARCHAR(255) NOT NULL,
+    done  TINYINT(1)   NOT NULL DEFAULT 0
+);

cloudPractice/docker-compose.yml

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+services:
+  db:
+    image: mysql:8.0
+    container_name: todo_db
+    environment:
+      MYSQL_ROOT_PASSWORD: root_pass
+      MYSQL_DATABASE: todo_db
+      MYSQL_USER: todo_user
+      MYSQL_PASSWORD: todo_pass
+    volumes:
+      - db_data:/var/lib/mysql
+      - ./db/init.sql:/docker-entrypoint-initdb.d/init.sql
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-utodo_user", "-ptodo_pass"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  app:
+    build: ./app
+    container_name: todo_app
+    ports:
+      - "5000:5000"
+    environment:
+      DB_HOST: db
+      DB_USER: todo_user
+      DB_PASSWORD: todo_pass
+      DB_NAME: todo_db
+    depends_on:
+      db:
+        condition: service_healthy
+
+volumes:
+  db_data: