Create a Docker Image From Container
🐳 Create a Docker Image From Container | Docker Level-2 Series | Lab 3
Welcome to Lab 3 of the Docker Level-2 Series! In this practical exercise, you’ll learn how to create a Docker image from a running container—an essential skill for preserving changes and building reusable environments.
A Nautilus developer has been testing new updates inside a running container and now wants to save those changes as a new Docker image. As part of the DevOps team, your task is to create an image from the existing container to ensure those modifications are محفوظ and reusable.
📌 Lab Objective:
Create a new Docker image from a running container.
🛠️ Task Requirements:
Server: Application Server 3
Container Name: ubuntu_latest
New Image Name: demo
💻 Step-by-Step Commands:
Connect to App Server 3
ssh tony@stapp03
Verify the running container
sudo docker ps
Create a new image from the container
sudo docker commit ubuntu_latest demo:xfusion
Verify the newly created image
sudo docker images
✅ Expected Output:
You should see the new image listed as:
demo:xfusion
📚 What You’ll Learn in This Video:
How to create Docker images from running containers
Understanding the docker commit command
Capturing container state for reuse
Managing Docker images effectively
Real-world DevOps workflows for container backup and versioning
🌟 Why This Lab Matters:
Creating images from containers is useful for saving experimental changes, debugging environments, and building custom images without writing a Dockerfile. This skill is valuable in rapid development and testing scenarios.
🎯 Series: Docker Level-2
Follow this series to master Docker concepts, including image management, containers, networking, volumes, and security.
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