adarshsingh7470/docker-demo

Project: Basic Flask Server in Docker Container on EC2

This project demonstrates how to create a basic Python server using Flask, containerize it with Docker, and host it on an EC2 instance. The server will simply respond with "Hello, World" to incoming requests.

Files Used:

• app.py: Contains the Python code for the Flask server.
• Dockerfile: Specifies instructions for building the Docker container.
• requirement.txt: Lists the Python dependencies required for the project.

Steps:

1. Setting up Flask Server:

• Create a file named app.py.
• Copy and paste the following code into app.py:

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World'

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0')

2. Creating Dockerfile:

• Create a file named Dockerfile.
• Copy and paste the following code into Dockerfile:

FROM python:3.9-slim

WORKDIR /app

COPY requirement.txt requirement.txt
RUN pip install -r requirement.txt

COPY . .

CMD [ "python", "app.py" ]

3. Defining Python Dependencies:

• Create a file named requirement.txt.
• Add the following line to requirement.txt:

Flask==3.0.2

4. Building Docker Image:

• Open terminal and navigate to the project directory.
• Execute the following command to build the Docker image:

docker build -t flask-server .

5. Running Docker Container Locally:

• Once the image is built, run the Docker container using the following command:

docker run -d -p 5000:5000 flask-server

6. Hosting on EC2:

• Launch an EC2 instance with Docker installed.
• Copy your Docker image to the EC2 instance.
• Run the Docker container on the EC2 instance, exposing port 5000.

7. Accessing Flask Server:

• Open a web browser.
• Navigate to http://your_ec2_instance_public_ip:5000/.
• You should see "Hello, World" displayed on the page.

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This README provides a step-by-step guide to create a basic Flask server,