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 rm [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 pull nginx
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 remote connections

https://stackoverflow.com/a/79113715/24263125 refer to my this comment to ssh docker playground instance.

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