Pulling from private registries in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to log in to a private Docker registry.

Docker

docker [1] myregistry.example.com

Drag options to blanks, or click blank then click option'

Apull

Bpush

Clogin

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker pull' instead of 'docker login' to authenticate.

Trying to use 'docker run' to log in.

The docker login command is used to authenticate with a private Docker registry.

2fill in blank

medium

Complete the command to pull an image from a private registry after login.

Docker

docker [1] myregistry.example.com/myimage:latest

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Alogin

Bpull

Cpush

Dbuild

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker login' instead of 'docker pull' to get images.

Using 'docker push' which uploads images instead of downloading.

The docker pull command downloads an image from a registry to your local machine.

3fill in blank

hard

Fix the error in the command to pull from a private registry by adding the missing option.

Docker

docker pull [1]/myimage:latest

Drag options to blanks, or click blank then click option'

Amyregistry.example.com

Blatest

Cdocker.io

Dlibrary

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the registry URL causes Docker to look in the public registry.

Using 'latest' or 'library' instead of the registry URL.

When pulling from a private registry, you must specify the registry URL before the image name.

4fill in blank

hard

Fill both blanks to create a Docker config file path and command to use it for authentication.

Docker

docker --config [1] [2] myregistry.example.com

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A~/.docker

Blogin

Cpull

D/etc/docker

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'pull' instead of 'login' with the config option.

Using '/etc/docker' which is less common for user config.

The --config option points to the Docker config directory, and login authenticates to the registry.

5fill in blank

hard

Fill the blanks to create a command that logs in with username and password from environment variables.

Docker

echo $[1] | docker login myregistry.example.com -u $[2] --password-stdin

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APASSWORD

BUSERNAME

CUSER

DPASS

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up USER and USERNAME variables.

Not using --password-stdin to securely pass the password.

This command uses the environment variable PASSWORD piped into docker login with username from USERNAME variable.