Container disk usage management in Docker - Mini Project: Build & Apply

Container disk usage management

📖 Scenario: You are managing a Docker environment on your computer. Over time, Docker containers and images use disk space. You want to check how much disk space Docker is using and clean up unused data to free space.

🎯 Goal: Learn how to check Docker disk usage and remove unused containers, images, and volumes safely.

📋 What You'll Learn

Use the docker system df command to check disk usage

Create a variable to hold the cleanup command

Use the cleanup command to remove unused Docker data

Display the disk usage before and after cleanup

💡 Why This Matters

🌍 Real World

Docker environments can fill up disk space quickly. Managing disk usage helps keep your system clean and fast.

💼 Career

DevOps engineers often need to monitor and clean Docker disk usage to maintain healthy CI/CD pipelines and production environments.

1

Check Docker disk usage

Run the command docker system df to see how much disk space Docker is using.

Docker

# Run the command to check Docker disk usage
# Your code here

Need a hint?

Type docker system df exactly to see disk usage summary.

2

Create cleanup command variable

Create a variable called cleanup_cmd and set it to the string docker system prune -f which will remove unused Docker data without asking for confirmation.

Docker

docker system df
# Create variable cleanup_cmd with value 'docker system prune -f'
# Your code here

Need a hint?

Assign the string 'docker system prune -f' to the variable cleanup_cmd.

3

Run the cleanup command

Use the variable cleanup_cmd to run the cleanup command and remove unused Docker data.

Docker

docker system df
cleanup_cmd='docker system prune -f'
# Run the cleanup command stored in cleanup_cmd
# Your code here

Need a hint?

Use $cleanup_cmd to run the command stored in the variable.

4

Check disk usage after cleanup

Run docker system df again to see the disk usage after cleanup.

Docker

docker system df
cleanup_cmd='docker system prune -f'
$cleanup_cmd
# Run docker system df again
# Your code here

Need a hint?

Run docker system df again to see updated disk usage.