🐳🛠️Day 17: Docker Project for DevOps Engineers

🐳📦 What is Dockerfile??

A Dockerfile is a text file that contains a set of instructions for building a Docker image.

It selects the base image, sets up the environment, installs dependencies, and explains how the application should run within a Docker container.

🐍🐳Creating a Docker Image for a Simple Python Web Application:

🐾Step 1: Create a Dockerfile for a simple web application (e.g. a Python app)

# Get a base image with python 3.7
FROM python:3.8-slim

# Set the workding directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
COPY . .

# Install all the required dependencies specified in requirements.txt
RUN pip install -r requirements.txt

# Make port 80 available to the world outside this container
EXPOSE 80

# Run the python app
CMD ["python","app.py"]

🐾Step 2: Build the image using the Dockerfile, and execute the following command in the same directory as the Dockerfile

docker build . -t python:latest

🐾Step 3: Run the container

docker run -d -p 80:80 python:latest

🐾Step 4: Verify that the application works as expected by accessing it in a web browser at http://localhost:80

🐾Step 5: Push the image to a public or private repository (e.g. Docker Hub)

docker push <image:tag-name>

Note:

• Make sure you're logged into Docker Hub before using the docker push command.

📚 Feel free to use these commands to manage your Docker images! 🐳

Happy Coding :) 🙌⚡

✅ Feel free to reach out if you have any questions. I'm delighted to help! 😊

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