Militsyn_A_CloudPractice

ansible/ansible/ansible.cfg

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+[defaults]
+roles_path = ./roles
+connect_timeout = 30
+host_key_checking = False
+inventory = ./inventory.ini

ansible/ansible/playbook.yml

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+---
+- name: Deploy MySQL database
+  hosts: db_servers
+  become: true
+  roles:
+    - db
+
+- name: Deploy Flask Todo application
+  hosts: app_servers
+  become: true
+  vars:
+    db_host: "{{ hostvars[groups['db_servers'][0]]['ansible_host'] }}"
+  roles:
+    - app

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

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+---
+- name: Install python3 and pip
+  apt:
+    name:
+      - python3
+      - python3-pip
+    state: present
+    update_cache: yes
+
+- name: Build and run Flask app container on host
+  shell: |
+    cd /mnt/c/Users/user/Desktop/homework3/app
+    docker build -t todoapp .
+    docker rm -f todoapp 2>/dev/null || true
+    docker run -d --name todoapp \
+      -e DB_HOST=localhost \
+      -e DB_USER=todouser \
+      -e DB_PASSWORD=todopassword \
+      -e DB_NAME=todoapp \
+      --network host \
+      -p 5000:5000 \
+      --restart always \
+      todoapp
+  delegate_to: localhost
+  become: false

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

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+---
+- name: Install python3 and pip
+  apt:
+    name:
+      - python3
+      - python3-pip
+    state: present
+    update_cache: yes
+
+- name: Pull and run MySQL container on host
+  shell: |
+    docker run -d --name mysql \
+      -e MYSQL_ROOT_PASSWORD=rootpassword \
+      -e MYSQL_DATABASE=todoapp \
+      -e MYSQL_USER=todouser \
+      -e MYSQL_PASSWORD=todopassword \
+      -p 3306:3306 \
+      --restart always \
+      mysql:8.0 || docker start mysql
+  delegate_to: localhost
+  become: false

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

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+---
+- name: Install dependencies
+  apt:
+    name:
+      - apt-transport-https
+      - ca-certificates
+      - curl
+      - gnupg
+      - lsb-release
+      - python3-pip
+    state: present
+    update_cache: yes
+
+- 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
+  apt:
+    name:
+      - docker-ce
+      - docker-ce-cli
+      - containerd.io
+      - docker-compose-plugin
+    state: present
+    update_cache: yes
+
+- name: Start Docker service
+  service:
+    name: docker
+    state: started
+    enabled: yes

app/Dockerfile

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+FROM python:3.12-slim
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+COPY . .
+CMD ["python", "app.py"]

app/app.py

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+from flask import Flask, render_template, request, redirect
+import mysql.connector
+import os
+import time
+
+app = Flask(__name__)
+
+def get_db():
+    for _ in range(10):
+        try:
+            return mysql.connector.connect(
+                host=os.environ.get("DB_HOST", "localhost"),
+                user=os.environ.get("DB_USER", "todouser"),
+                password=os.environ.get("DB_PASSWORD", "todopassword"),
+                database=os.environ.get("DB_NAME", "todoapp")
+            )
+        except:
+            time.sleep(3)
+
+def init_db():
+    db = get_db()
+    cursor = db.cursor()
+    cursor.execute("""
+        CREATE TABLE IF NOT EXISTS tasks (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            title VARCHAR(255) NOT NULL,
+            done BOOLEAN DEFAULT FALSE
+        )
+    """)
+    db.commit()
+    db.close()
+
+@app.route("/")
+def index():
+    db = get_db()
+    cursor = db.cursor()
+    cursor.execute("SELECT * FROM tasks")
+    tasks = cursor.fetchall()
+    db.close()
+    return render_template("index.html", tasks=tasks)
+
+@app.route("/add", methods=["POST"])
+def add():
+    title = request.form.get("title")
+    if title:
+        db = get_db()
+        cursor = db.cursor()
+        cursor.execute("INSERT INTO tasks (title) VALUES (%s)", (title,))
+        db.commit()
+        db.close()
+    return redirect("/")
+
+@app.route("/toggle/<int:task_id>")
+def toggle(task_id):
+    db = get_db()
+    cursor = db.cursor()
+    cursor.execute("UPDATE tasks SET done = NOT done WHERE id = %s", (task_id,))
+    db.commit()
+    db.close()
+    return redirect("/")
+
+@app.route("/delete/<int:task_id>")
+def delete(task_id):
+    db = get_db()
+    cursor = db.cursor()
+    cursor.execute("DELETE FROM tasks WHERE id = %s", (task_id,))
+    db.commit()
+    db.close()
+    return redirect("/")
+
+if __name__ == "__main__":
+    init_db()
+    app.run(host="0.0.0.0", port=5000)

app/requirements.txt

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+flask==3.0.3
+mysql-connector-python==8.3.0

app/templates/index.html

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+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>Todo App</title>
+    <style>
+        body { font-family: Arial, sans-serif; max-width: 600px; margin: 40px auto; padding: 0 20px; }
+        h1 { color: #333; }
+        form { display: flex; gap: 10px; margin-bottom: 20px; }
+        input[type=text] { flex: 1; padding: 8px; font-size: 16px; border: 1px solid #ccc; border-radius: 4px; }
+        button { padding: 8px 16px; background: #4CAF50; color: white; border: none; border-radius: 4px; cursor: pointer; }
+        ul { list-style: none; padding: 0; }
+        li { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px solid #eee; }
+        .done { text-decoration: line-through; color: #999; }
+        a { color: #666; text-decoration: none; font-size: 14px; }
+        a:hover { color: #333; }
+    </style>
+</head>
+<body>
+    <h1>Todo List</h1>
+    <form action="/add" method="post">
+        <input type="text" name="title" placeholder="Новая задача..." required>
+        <button type="submit">Добавить</button>
+    </form>
+    <ul>
+        {% for task in tasks %}
+        <li>
+            <span class="{{ 'done' if task[2] else '' }}">{{ task[1] }}</span>
+            <a href="/toggle/{{ task[0] }}">{{ 'Отменить' if task[2] else 'Готово' }}</a>
+            <a href="/delete/{{ task[0] }}">Удалить</a>
+        </li>
+        {% endfor %}
+    </ul>
+</body>
+</html>

terraform/main.tf

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+# SSH ключ
+resource "openstack_compute_keypair_v2" "militsyn_key" {
+  name       = var.ssh_key_name
+  region     = var.region
+  public_key = file(pathexpand("~/.ssh/id_rsa.pub"))
+}
+
+# Flavor (конфигурация ВМ): 1 CPU, 2GB RAM, 10GB диск
+resource "openstack_compute_flavor_v2" "militsyn_flavor" {
+  name      = "militsyn_flavor"
+  ram       = 2048
+  vcpus     = 1
+  disk      = 10
+  is_public = false
+}
+
+# Сеть
+resource "openstack_networking_network_v2" "militsyn_network" {
+  name           = "militsyn_network"
+  admin_state_up = true
+  region         = var.region
+}
+
+# Подсеть
+resource "openstack_networking_subnet_v2" "militsyn_subnet" {
+  name        = "militsyn_subnet"
+  network_id  = openstack_networking_network_v2.militsyn_network.id
+  cidr        = "10.0.0.0/24"
+  region      = var.region
+  dns_nameservers = ["8.8.8.8", "8.8.4.4"]
+}
+
+# Плавающий IP для app-сервера
+resource "openstack_networking_floatingip_v2" "app_fip" {
+  pool   = "external-network"
+  region = var.region
+}
+
+# Плавающий IP для db-сервера
+resource "openstack_networking_floatingip_v2" "db_fip" {
+  pool   = "external-network"
+  region = var.region
+}
+
+# ВМ 1 — app-сервер (Flask)
+resource "openstack_compute_instance_v2" "app_server" {
+  name              = "militsyn_app"
+  image_name        = var.image_name
+  flavor_id         = openstack_compute_flavor_v2.militsyn_flavor.id
+  key_pair          = openstack_compute_keypair_v2.militsyn_key.name
+  region            = var.region
+  availability_zone = var.zone
+  metadata          = var.server_preemptible_tag
+
+  network {
+    uuid = openstack_networking_network_v2.militsyn_network.id
+  }
+}
+
+# ВМ 2 — db-сервер (MySQL)
+resource "openstack_compute_instance_v2" "db_server" {
+  name              = "militsyn_db"
+  image_name        = var.image_name
+  flavor_id         = openstack_compute_flavor_v2.militsyn_flavor.id
+  key_pair          = openstack_compute_keypair_v2.militsyn_key.name
+  region            = var.region
+  availability_zone = var.zone
+  metadata          = var.server_preemptible_tag
+
+  network {
+    uuid = openstack_networking_network_v2.militsyn_network.id
+  }
+}
+
+# Привязка плавающих IP
+resource "openstack_compute_floatingip_associate_v2" "app_fip_assoc" {
+  floating_ip = openstack_networking_floatingip_v2.app_fip.address
+  instance_id = openstack_compute_instance_v2.app_server.id
+}
+
+resource "openstack_compute_floatingip_associate_v2" "db_fip_assoc" {
+  floating_ip = openstack_networking_floatingip_v2.db_fip.address
+  instance_id = openstack_compute_instance_v2.db_server.id
+}
+
+# Генерация inventory.ini для Ansible
+resource "local_file" "inventory" {
+  content = <<-EOT
+    [app_servers]
+    vm1 ansible_host=${openstack_networking_floatingip_v2.app_fip.address} ansible_user=ubuntu ansible_ssh_private_key_file=~/.ssh/id_rsa
+
+    [db_servers]
+    vm2 ansible_host=${openstack_networking_floatingip_v2.db_fip.address} ansible_user=ubuntu ansible_ssh_private_key_file=~/.ssh/id_rsa
+
+    [all:vars]
+    ansible_python_interpreter=/usr/bin/python3
+  EOT
+  filename = "${path.module}/../ansible/inventory.ini"
+}