Today marks the beginning of my DevOps learning journey, and I kicked it off by diving into Docker. Here's what I learned and accomplished on my first day.

no more it works on my machine 🚀

Understanding the Basics

First, I grasped the fundamental concepts:

• Containers: Lightweight, standalone packages that include everything needed to run a piece of software, ensuring consistency across different environments.
• Docker: A platform that enables creating, deploying, and running applications using container technology.
• Docker Hub: The official repository for Docker images, like GitHub but for container images.

Essential Docker Commands

I learned several basic Docker commands that are crucial for container management:

# List all running containers
docker ps

# List all Docker images on your system
docker image ls

# Pull an image from Docker Hub
docker pull [image-name]

# Remove containers or images
docker remove [container-id/name]

# Run a container
docker run [options] [image-name]

Hands-on Practice: Running Nginx

My first practical exercise was setting up an Nginx web server using Docker. Here's how I did it:

docker run --name my-nginx -p 8080:80 -d nginx

Let's break down this command:

• --name my-nginx: Assigns a custom name to the container
• -p 8080:80: Maps port 8080 on my host to port 80 in the container
• -d: Runs the container in detached mode (background)
• nginx: The image to use

Connecting to Docker Playground

One interesting challenge I tackled was accessing Docker Playground from Windows using Git Bash via SSH. This gave me experience with:

• Remote container management
• Using SSH for Docker connections
• Working with Docker in a cloud environment

Key Takeaways from Day 1

1. Docker simplifies application deployment through containerization
2. Basic Docker commands are intuitive and follow a logical pattern
3. Port mapping is crucial for accessing containerized applications
4. Docker Playground provides a great environment for learning

What's Next?

Tomorrow, I plan to explore:

• Create own docker image using as Dockerfile.
• Deploying own simple express app.
• Multi-container applications.
• Docker networking basics.

the resource I used for learning docker is : https://youtu.be/rr9cI4u1_88?si=s8ehmucFYWfjcci5

Stay tuned for more updates on my DevOps journey! Feel free to share your thoughts and suggestions in the comments below.

Docker #DevOps #Learning #TechBlog