Day-16 of DevOps: Mastering Dockerfiles, Volumes, and Docker Compose 🐳

Source: Dev.to

🏗️ The Architecture

📝 My First Dockerfile

• Used FROM to select a base image.
• Used COPY to move my code inside.
• Used CMD to tell the container what to do on startup.

💾 Networks & Volumes (Persistence!)

Volumes

• Managed by Docker, great for database storage.

Networks

• Created custom bridge networks so my containers could talk to each other by name, rather than IP address.

🐙 Docker Compose

docker-compose up -d

• The whole environment spun up instantly. No more manual linking!

☁️ Docker Hub

• Created a repository on Docker Hub.
• Tagged my local image:

docker tag my-image my-username/my-repo:v1

• Pushed it to the cloud.
• Practiced pulling images from other users to understand how to leverage the community’s work.

Takeaway

Docker Compose is a game-changer for local development environments!

What was the first image you ever built? Let me know in the comments! 🚀