Here is the complete README.md fully written in English, structured professionally for your GitHub repository:

🚀 Ansible Deployment for Django Todo Application

This repository contains an Ansible playbook and a custom role for the automated, idempotent deployment of a Django-based Todo application on target servers running Ubuntu 24.04 LTS.

✨ Features

• Full Automation: Installs required system packages (Python 3.12, python3-venv, git), configures the environment, and starts the application with a single command.
• Virtualenv Isolation: Deploys the application and its dependencies within an isolated Python virtual environment (venv) to comply with Ubuntu 24.04 PEP 668 policies.
• Automated Database Migrations: Runs Django database migrations natively during the deployment phase before the service restarts, ensuring data consistency.
• Optimized Handlers: Executes systemd daemon-reload and service restarts strictly at the end of the playbook, triggering only if actual changes were made to the source code or service configuration.
• Systemd Orchestration: Configures the application as a persistent system service with auto-restart policies on failure.

---

📂 Project Structure

.
├── inventory.yaml          # Inventory file specifying managed hosts and SSH access
├── playbook.yaml           # Main playbook that executes the deployment role
└── roles/
    └── todoapp/            # Custom deployment role for the application
        ├── defaults/
        │   └── main.yaml   # Default role variables (paths, repo URL)
        ├── handlers/
        │   └── main.yaml   # Handlers for systemd daemon-reload and service restarts
        ├── tasks/
        │   └── main.yaml   # Core deployment workflow and step-by-step tasks
        └── templates/
            └── todoapp_service.j2 # Jinja2 template for the systemd service file

---

🛠️ Prerequisites

• Control Node (Your machine): Ansible 2.15+ installed.
• Managed Node (Target server): A clean instance of Ubuntu 24.04 LTS with SSH access and sudo privileges configured.

---

⚙️ Configuration

1. Update Role Defaults

Open roles/todoapp/defaults/main.yaml and modify the default variables if your paths or repository URLs differ:

todoapp_path: /app
todoapp_git_url: https://github.com/Killingrace/Todoapp_Ansible.git
todoapp_venv_name: venv

2. Configure Your Inventory

Edit the inventory.yaml file to include your target server's IP address, SSH user, and private key path:

all:
  hosts:
    todo_server:
      ansible_host: 192.168.0.1   # Replace with your server's IP
      ansible_user: azureuser     # Replace with your SSH user (e.g., ubuntu, root)
      ansible_ssh_private_key_file: ~/.ssh/id_ed25519

---

🚀 Running the Deployment

Before running the playbook, verify the connection to your managed host and check the inventory structure:

# Test connectivity with the ping module
ansible all -m ping -i inventory.yaml

# Verify inventory hierarchy
ansible-inventory -i inventory.yaml --graph

To execute the deployment, run the following command:

ansible-playbook -i inventory.yaml playbook.yaml

---

🔍 Verification & Troubleshooting

Once the deployment finishes successfully, log in to your target server to verify the status of the application:

# Check the systemd service status
systemctl status todoapp

# Stream application logs in real-time
journalctl -u todoapp -f

The application will be accessible via your browser at: http://<YOUR_SERVER_IP>:8080