Cloud Computing

To make sure your Flask application works on AWS Lambda, EC2, and GCP, you need to package it appropriately and handle deployment specifics for each platform. Here's a general guide for each environment:

AWS Lambda

For AWS Lambda, you can use the Serverless Framework or Zappa to deploy Flask applications.

1. Install Zappa:

   pip install zappa

2. Initialize Zappa:

   zappa init

3. Configure Zappa: Ensure your zappa_settings.json is correctly configured. Here's a basic example:

   {
     "dev": {
       "app_function": "app.app",  # The entry point to your application
       "aws_region": "us-east-1",  # Your AWS region
       "s3_bucket": "your-s3-bucket"  # S3 bucket for deployment
     }
   }

4. Deploy with Zappa:

   zappa deploy dev

AWS EC2

For AWS EC2, you can set up a virtual machine, install necessary dependencies, and run your Flask application.

1. Launch an EC2 instance:

   • Choose an appropriate instance type and AMI (e.g., Ubuntu).

2. Connect to your instance:

   ssh -i /path/to/your-key.pem ubuntu@your-ec2-public-dns

3. Install dependencies:

   sudo apt update
   sudo apt install python3-pip python3-dev nginx
   sudo pip3 install virtualenv

4. Clone your project and set up the environment:

   git clone https://github.com/BharadwajMahanthi/Cloud-Computing.git
   cd your-project
   virtualenv venv
   source venv/bin/activate
   pip install -r requirements.txt

5. Run your application:

   flask run --host=0.0.0.0

6. Configure Nginx:

   • Create a new Nginx configuration file:

     sudo nano /etc/nginx/sites-available/your-project

   • Add the following content:

     server {
         listen 80;
         server_name your-ec2-public-dns;
     
         location / {
             proxy_pass http://127.0.0.1:5000;
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
             proxy_set_header X-Forwarded-Proto $scheme;
         }
     }

   • Enable the configuration:

     sudo ln -s /etc/nginx/sites-available/your-project /etc/nginx/sites-enabled
     sudo nginx -t
     sudo systemctl restart nginx

Google Cloud Platform (GCP)

For GCP, you can deploy your Flask application using Google App Engine or a VM instance.

Google App Engine

1. Create a app.yaml file:

   runtime: python39
   
   handlers:
   - url: /
     script: auto

2. Deploy to App Engine:

   gcloud app deploy

Google Compute Engine (VM Instance)

1. Create a VM instance on GCP and SSH into it.

2. Install dependencies (similar to EC2):

   sudo apt update
   sudo apt install python3-pip python3-dev nginx
   sudo pip3 install virtualenv

3. Clone your project and set up the environment:

   git clone https://github.com/your-repo/your-project.git
   cd your-project
   virtualenv venv
   source venv/bin/activate
   pip install -r requirements.txt

4. Run your application:

   flask run --host=0.0.0.0

5. Configure Nginx (similar to EC2).

Flask Application Code

Make sure your Flask application code is ready for deployment.