Fullstack Flask: Deploying Flask Apps on AWS EC2

 When it comes to deploying fullstack applications, AWS EC2 (Elastic Compute Cloud) offers a powerful and flexible environment to host your Flask backend. EC2 allows developers to launch virtual machines in the cloud and configure them to run web applications at scale. In this blog, we'll walk through the process of deploying a Flask app on an AWS EC2 instance and discuss why EC2 is a reliable choice for fullstack deployment.


Why Choose AWS EC2 for Flask Deployment?

Deploying a Flask app on EC2 provides you with full control over your infrastructure. While platforms like Heroku or Render simplify deployment, EC2 offers:

Scalability: Add more resources or instances as your app grows.

Custom Configuration: Install any libraries or services you need.

Cost Flexibility: Pay-as-you-go model based on compute usage.

Integration: Seamless integration with other AWS services like RDS, S3, and Route 53.


Step-by-Step Guide to Deploy Flask on AWS EC2

1. Launch an EC2 Instance

Log into your AWS Management Console.

Navigate to EC2 and launch a new instance.

Choose an Amazon Linux 2 or Ubuntu AMI.

Select instance type (e.g., t2.micro for free-tier users).

Create a key pair to SSH into the instance.

Allow HTTP (port 80), HTTPS (443), and SSH (22) in your security group.


2. SSH into the Instance

Once your instance is running, connect using your key pair:


bash


ssh -i "your-key.pem" ec2-user@your-ec2-public-ip


3. Set Up the Environment

Update your system and install Python, pip, and Git:


bash

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Edit

sudo apt update && sudo apt upgrade

sudo apt install python3-pip python3-dev nginx git

Clone your Flask app repository or upload your files to the server.


4. Install and Run Flask App

Navigate to your project directory:


bash


cd your-flask-app/

pip3 install -r requirements.txt

Test the app locally using:


bash

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Edit

python3 app.py

Your app should now be running on port 5000.


5. Use Gunicorn as WSGI Server

To serve your Flask app in production, use Gunicorn:


bash

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Edit

pip3 install gunicorn

gunicorn -w 3 -b 0.0.0.0:8000 app:app

This command runs Gunicorn with 3 worker processes, binding to port 8000.


6. Configure Nginx as a Reverse Proxy

Create an Nginx configuration file:


bash

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Edit

sudo nano /etc/nginx/sites-available/flaskapp

Paste the following configuration:


nginx

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Edit

server {

    listen 80;

    server_name your-ec2-public-ip;


    location / {

        proxy_pass http://127.0.0.1:8000;

        proxy_set_header Host $host;

        proxy_set_header X-Real-IP $remote_addr;

    }

}

Enable the site and restart Nginx:


bash

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Edit

sudo ln -s /etc/nginx/sites-available/flaskapp /etc/nginx/sites-enabled

sudo nginx -t

sudo systemctl restart nginx


7. Access Your Flask App

Now, navigate to http://your-ec2-public-ip in your browser, and your Flask app should be live!


Conclusion

Deploying your Flask app on AWS EC2 gives you full control over your server environment, allowing for custom configurations, better scalability, and tight integration with other AWS services. While the process may seem manual at first, it lays a strong foundation for learning DevOps and managing production-grade deployments. Once you're comfortable, you can expand this setup with SSL (via Certbot), a database (like RDS), and automated CI/CD pipelines.


Learn FullStack Python Training Course

Read More : Introduction to Cloud Deployment for Fullstack Python Applications

Read More : Flask Microservices: Implementing Service Mesh with Istio

Read More :  Fullstack Flask: Security Challenges in Microservices and Best Practices

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