Day12.md

Day 12: Final Project - Simple Deployment Script 🚀

Concept:

Let's combine everything we've learned to create a practical automation script. The goal is to deploy a simple application by creating a directory, uploading files, installing dependencies, and running the app. This demonstrates a realistic use case for Paramiko.

Code Example & Final Challenge:

Your final task is to write a single Python script that performs the following steps. This is the challenge. Use the concepts and code from the previous days as your building blocks.

Project Requirements:

1. Local Setup:

   • Create a local folder named my_app.
   • Inside my_app, create a file app.py with the content: print("🎉 My application is running successfully!")
   • Create another file requirements.txt with the content: cowsay

2. Remote Automation Script:

   • Connect to your remote server using SSH key authentication.
   • Define a remote path, e.g., remote_app_path = '/tmp/my_deployed_app'.
   • Execute a command to create this directory on the remote server (mkdir -p /tmp/my_deployed_app).
   • Use SFTP to upload app.py and requirements.txt into the remote directory.
   • Execute a command to install the dependencies using pip: python3 -m pip install -r /tmp/my_deployed_app/requirements.txt.
   • Execute a final command to run the application and show its output: python3 /tmp/my_deployed_app/app.py | cowsay.
   • Print the output from the previous command to your local console.
   • Cleanup: Execute a command to remove the remote directory (rm -rf /tmp/my_deployed_app).
   • Close the connection and print a "Deployment complete!" message.
   • Wrap your logic in try...finally to ensure the connection is always closed.

Good luck! This final challenge will solidify your understanding of Paramiko's core workflow.