Image Clean-Up Journey

Introduction

In this lab, we will explore the process of removing Docker images using the docker rmi command. Our scenario is set in an ancient empire where the royal guard, Sam, is responsible for maintaining the kingdom’s Docker environment. However, due to recent conflicts, the kingdom is facing a resource scarcity and needs to reclaim precious resources by removing unnecessary Docker images. Sam’s task is to free up space by removing specific Docker images to ensure the kingdom’s Docker environment runs efficiently.

Skills Graph

Removing a Single Image

In this step, Sam needs to remove a specific Docker image to free up space. First, Sam will list all Docker images to identify the target image, and then instruct Docker to remove it.

In this step, we'll use the alpine Docker image to demonstrate the removal process.

## List all Docker images
docker images

## Remove the 'alpine' image
docker rmi alpine

Removing Multiple Images

The kingdom’s Docker environment has accumulated several unused images that need to be removed. Sam must remove multiple Docker images to free up additional space.

In this step, we'll use multiple Docker images - nginx and hello-world - to demonstrate removal of multiple images.

## List all Docker images
docker images

## Remove the 'nginx' and 'hello-world' images
docker rmi nginx hello-world

Summary

In this lab, we explored the docker rmi command to remove Docker images. This included removing a single image and removing multiple images. This lab provides a hands-on experience for managing Docker images efficiently, catering to both beginner and intermediate Docker users.