Ansible laba Borodin

ansible/ansible.cfg

@@ -1,5 +1,4 @@
 [defaults]
-roles_path = ../ansible
-connect_timeout = 30
+inventory = inventory.ini
 host_key_checking = False
-inventory = ./inventory.ini
+retry_files_enabled = False

ansible/inventory.ini

@@ -0,0 +1,8 @@
+[todo_app]
+app ansible_connection=local db_host=192.168.11.1
+
+[todo_db]
+db ansible_host=192.168.11.1 ansible_user=borodin_2 ansible_ssh_common_args='-o PubkeyAuthentication=no -o PreferredAuthentications=password'
+
+[all:vars]
+ansible_python_interpreter=/usr/bin/python3

ansible/playbook.yml

@@ -1,23 +1,84 @@
-###############################
-#   WEB TO DO APPLICATION  #
-###############################
-
 ---
-- name: "Installing Docker and docker compose"
+- name: Install Docker on all hosts
   hosts: all
-  roles:
-  - docker-install
-
-- name: "Run Docker compose service: database"
-  hosts: database
-  vars_files:
-    - "./docker-service/vars/database.yml"
-  roles:
-  - docker-service
-
-- name: "Run Docker compose service: web app"
-  hosts: webapp
-  vars_files:
-    - "./docker-service/vars/webapp.yml"
-  roles:
-  - docker-service
+  become: yes
+  tasks:
+    - name: Update apt cache
+      apt:
+        update_cache: yes
+
+    - name: Install docker and docker-compose
+      apt:
+        name:
+          - docker.io
+          - docker-compose
+        state: present
+
+    - name: Enable docker service
+      service:
+        name: docker
+        state: started
+        enabled: yes
+
+
+- name: Deploy MySQL database
+  hosts: todo_db
+  become: yes
+  tasks:
+    - name: Create database directory
+      file:
+        path: /opt/todo-db
+        state: directory
+        mode: '0755'
+
+    - name: Copy database compose file
+      template:
+        src: templates/db-compose.yml.j2
+        dest: /opt/todo-db/docker-compose.yml
+
+    - name: Start MySQL container
+      shell: docker-compose up -d
+      args:
+        chdir: /opt/todo-db
+
+    - name: Wait for database port
+      wait_for:
+        host: 127.0.0.1
+        port: 3306
+        timeout: 120
+
+    - name: Wait extra time for MariaDB initialization
+      pause:
+        seconds: 20
+
+
+- name: Deploy Todo application
+  hosts: todo_app
+  become: yes
+  tasks:
+    - name: Create app directory
+      file:
+        path: /opt/todo-app
+        state: directory
+        mode: '0755'
+
+    - name: Copy application files
+      copy:
+        src: ../app/
+        dest: /opt/todo-app/
+
+    - name: Copy app compose file
+      template:
+        src: templates/app-compose.yml.j2
+        dest: /opt/todo-app/docker-compose.yml
+
+    - name: Start Todo application
+      shell: docker-compose up -d --build --force-recreate
+      args:
+        chdir: /opt/todo-app
+
+    - name: Wait for Todo application port
+      wait_for:
+        host: 127.0.0.1
+        port: 8080
+        timeout: 120

ansible/templates/app-compose.yml.j2

@@ -0,0 +1,15 @@
+version: '3'
+
+services:
+  todo-app:
+    build: .
+    container_name: todo-app
+    restart: always
+    ports:
+      - "8080:5000"
+    environment:
+      DB_HOST: "{{ db_host }}"
+      DB_NAME: todo
+      DB_USER: todo
+      DB_PASSWORD: todo_pass
+

ansible/templates/db-compose.yml.j2

@@ -0,0 +1,19 @@
+version: '3'
+
+services:
+  mysql:
+    image: mariadb:10.6
+    container_name: todo-mysql
+    restart: always
+    environment:
+      MARIADB_ROOT_PASSWORD: root_pass
+      MARIADB_DATABASE: todo
+      MARIADB_USER: todo
+      MARIADB_PASSWORD: todo_pass
+    ports:
+      - "3306:3306"
+    volumes:
+      - mysql_data:/var/lib/mysql
+
+volumes:
+  mysql_data:

app/Dockerfile

@@ -0,0 +1,11 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app.py .
+
+CMD ["python", "app.py"]
+

app/app.py

@@ -0,0 +1,118 @@
+import os
+import time
+import mysql.connector
+from flask import Flask, request, redirect, render_template_string
+
+app = Flask(__name__)
+
+DB_HOST = os.getenv("DB_HOST", "127.0.0.1")
+DB_NAME = os.getenv("DB_NAME", "todo")
+DB_USER = os.getenv("DB_USER", "todo")
+DB_PASSWORD = os.getenv("DB_PASSWORD", "todo_pass")
+
+
+def get_connection():
+    return mysql.connector.connect(
+        host=DB_HOST,
+        database=DB_NAME,
+        user=DB_USER,
+        password=DB_PASSWORD
+    )
+
+
+def init_db():
+    for _ in range(30):
+        try:
+            conn = get_connection()
+            cursor = conn.cursor()
+            cursor.execute("""
+                CREATE TABLE IF NOT EXISTS todos (
+                    id INT AUTO_INCREMENT PRIMARY KEY,
+                    title VARCHAR(255) NOT NULL
+                )
+            """)
+            conn.commit()
+            cursor.close()
+            conn.close()
+            return
+        except Exception as error:
+            print(f"Waiting for database: {error}", flush=True)
+            time.sleep(5)
+
+
+@app.route("/", methods=["GET"])
+def index():
+    conn = get_connection()
+    cursor = conn.cursor(dictionary=True)
+    cursor.execute("SELECT id, title FROM todos ORDER BY id DESC")
+    todos = cursor.fetchall()
+    cursor.close()
+    conn.close()
+
+    return render_template_string("""
+    <!DOCTYPE html>
+    <html>
+    <head>
+        <title>Todo App</title>
+        <style>
+            body { font-family: Arial, sans-serif; margin: 40px; background: #f6f7fb; }
+            .container { max-width: 700px; margin: auto; background: white; padding: 30px; border-radius: 12px; }
+            h1 { color: #222; }
+            form { margin-bottom: 20px; }
+            input { padding: 10px; width: 70%; }
+            button { padding: 10px 16px; cursor: pointer; }
+            li { margin: 10px 0; }
+            .delete { margin-left: 20px; }
+        </style>
+    </head>
+    <body>
+        <div class="container">
+            <h1>Todo App</h1>
+            <form method="post" action="/add">
+                <input name="title" placeholder="New task" required>
+                <button type="submit">Add</button>
+            </form>
+
+            <ul>
+            {% for todo in todos %}
+                <li>
+                    {{ todo.title }}
+                    <form class="delete" method="post" action="/delete/{{ todo.id }}" style="display:inline;">
+                        <button type="submit">Delete</button>
+                    </form>
+                </li>
+            {% endfor %}
+            </ul>
+        </div>
+    </body>
+    </html>
+    """, todos=todos)
+
+
+@app.route("/add", methods=["POST"])
+def add():
+    title = request.form.get("title")
+    if title:
+        conn = get_connection()
+        cursor = conn.cursor()
+        cursor.execute("INSERT INTO todos (title) VALUES (%s)", (title,))
+        conn.commit()
+        cursor.close()
+        conn.close()
+    return redirect("/")
+
+
+@app.route("/delete/<int:todo_id>", methods=["POST"])
+def delete(todo_id):
+    conn = get_connection()
+    cursor = conn.cursor()
+    cursor.execute("DELETE FROM todos WHERE id = %s", (todo_id,))
+    conn.commit()
+    cursor.close()
+    conn.close()
+    return redirect("/")
+
+
+if __name__ == "__main__":
+    init_db()
+    app.run(host="0.0.0.0", port=5000)

app/requirements.txt

@@ -0,0 +1,3 @@
+flask
+mysql-connector-python
+