Prune Docker Objects Discovery

Introduction

In this lab, we will explore the concept of pruning unused Docker objects using the prune command. The scenario is set in an ancient Egyptian pharaoh's palace where the palace guard needs to efficiently manage the various objects lying around to keep the surroundings clean and organized.

Scenario Description:

The ancient Egyptian pharaoh's palace is sprawling with various objects and artifacts, from grand sculptures to intricate tapestries. The palace guard, responsible for maintaining order and cleanliness, needs to identify and remove any unused or unnecessary objects to ensure that the palace remains in pristine condition.

Scenario Goals:

The main goal is to utilize the Docker prune command to identify and remove unused Docker objects, thereby optimizing the palace's surroundings and ensuring efficient resource management.

Skills Graph

Prune Unused Docker Images

In this step, you will learn how to use the Docker prune command to remove unused Docker images.

Instructions:

1. List all the Docker images currently present to determine the ones that are not in use:

   docker images

2. Implement the prune command to remove any dangling or unused images:

   docker image prune -a

Prune Unused Containers

In this step, you will use the prune command to remove any stopped containers that are no longer in use.

Instructions:

1. List all containers, including the ones that are currently stopped:

   docker ps -a

2. Use the prune command to remove any stopped containers:

   docker container prune

Prune Unused Volumes

In this step, you will learn how to prune unused Docker volumes.

Instructions:

1. List all volumes to identify the ones that are not in use:

   docker volume ls

2. Execute the prune command to remove any unused volumes:

   docker volume prune

Summary

In this lab, we simulated the role of the palace guard in an ancient Egyptian pharaoh's palace to understand the concept of pruning unused Docker objects with the prune command. By following the steps, you have gained hands-on experience in identifying and removing dangling images, stopped containers, and unused volumes, thereby optimizing resource utilization and maintaining a clutter-free Docker environment.