Mastering DevOps Batch Lecture 12 Docker Save, Load, Export, Import, Tag Push to DockerHub
Welcome to Mastering DevOps Batch – Lecture 12 🚀
In this lecture, we dive deep into Docker image management and registry concepts.
You will learn how to backup, transfer, and share Docker images using different Docker commands and registries.
This session covers both public registry (DockerHub) and private registry setup, which are essential skills for every DevOps engineer.
🐳 Topics Covered in This Lecture
Docker Image Backup Commands
✔ Docker save
✔ Docker load
✔ Docker export
✔ Docker import
✔ Docker tag
You will understand the difference between save/load and export/import with practical examples.
📦 Docker Registry Concepts
In this lecture I also explained:
✔ What is DockerHub
✔ How to create DockerHub account
✔ How to push Docker image to DockerHub
✔ Tagging images before pushing
✔ Pulling images from DockerHub
🔐 Private Docker Registry
We also covered:
✔ Creating a local Docker private registry
✔ Running registry container
✔ Pushing images to private registry
✔ Listing images in private registry
Example registry endpoint:
http://localhost:5000/v2/_catalog
🛠️ Commands Demonstrated in This Lecture
Save docker image
docker save -o nginx.tar nginx
Load docker image
docker load -i nginx.tar
Export container filesystem
docker export container_id container.tar
Import container as image
docker import container.tar myimage:v1
Tag image
docker tag nginx username/nginx:v1
Login to DockerHub
docker login
Push image to DockerHub
docker push username/nginx:v1
Run private registry
docker run -d -p 5000:5000 --name registry registry:2
Tag image for private registry
docker tag nginx localhost:5000/nginx:v1
Push to private registry
docker push localhost:5000/nginx:v1
List images in registry
curl http://localhost:5000/v2/_catalog
🎯 Who Should Watch This Lecture
✔ DevOps Engineers
✔ Docker Beginners
✔ Cloud Engineers
✔ Students preparing for DevOps interviews
✔ Anyone learning containerization
🚀 Why This Lecture is Important
In real DevOps projects we often need to:
Transfer images to offline servers
Store images in private registries
Share images across environments
Manage image versions
These commands are very common in real production environments.
🔔 Upcoming DevOps Lectures
Next lectures will cover:
Docker Storage & Volumes
Docker Networking
Docker Compose
Kubernetes Basics
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