How to use docker scout repo list command to list repositories

Introduction

In this lab, you will learn how to use the docker scout repo ls command to list and filter Docker Scout repositories. Docker Scout helps you understand the security posture of your images, and managing your repositories is a key part of this process.

You will begin by listing all configured Docker Scout repositories. Then, you will explore how to filter the list by repository name to find specific repositories. Finally, you will learn how to list only enabled repositories and how to list repositories from a specific registry.

List all Docker Scout repositories

In this step, you will learn how to list all Docker Scout repositories that are currently configured. Docker Scout helps you understand the security posture of your images.

To list all repositories, you can use the docker scout repo ls command. This command will display a list of all repositories that Docker Scout is tracking, along with their status (enabled or disabled).

Let's try listing the repositories. Open your terminal in the LabEx environment.

docker scout repo ls

You should see output similar to this (the exact output may vary depending on the default configuration):

REPOSITORY                                  STATUS
docker.io/library/alpine                    enabled
docker.io/library/ubuntu                    enabled

This output shows the repository name and its current status.

List repositories filtered by name

In this step, you will learn how to filter the list of Docker Scout repositories by name. This is useful when you have many repositories configured and want to find a specific one or a group of repositories that match a certain pattern.

You can use the --filter name=<pattern> flag with the docker scout repo ls command to filter the output by repository name. The pattern can be a full name or a partial name.

Let's try filtering the repositories to only show those with "alpine" in their name.

docker scout repo ls --filter name=alpine

You should see output similar to this, showing only the repository containing "alpine":

REPOSITORY                                  STATUS
docker.io/library/alpine                    enabled

Now, let's try filtering for repositories containing "ubuntu".

docker scout repo ls --filter name=ubuntu

You should see output similar to this:

REPOSITORY                                  STATUS
docker.io/library/ubuntu                    enabled

This demonstrates how to use the --filter name flag to narrow down the list of repositories based on their names.

List only enabled repositories

In this step, you will learn how to list only the enabled Docker Scout repositories. By default, docker scout repo ls lists all repositories, regardless of their status. You can filter the list to show only those that are currently enabled for scanning.

To list only enabled repositories, you can use the --filter status=enabled flag with the docker scout repo ls command.

Let's try listing only the enabled repositories.

docker scout repo ls --filter status=enabled

You should see output similar to this, showing only repositories with the status "enabled":

REPOSITORY                                  STATUS
docker.io/library/alpine                    enabled
docker.io/library/ubuntu                    enabled

This is useful when you want to quickly see which repositories are actively being monitored by Docker Scout.

List repositories from a specific registry

In this step, you will learn how to list Docker Scout repositories that belong to a specific registry. This is helpful when you are working with multiple registries and want to focus on repositories from a particular source.

You can use the --filter registry=<registry_name> flag with the docker scout repo ls command to filter the output by the registry name. For example, to list repositories from Docker Hub, you would use docker.io.

Let's try listing repositories from the docker.io registry.

docker scout repo ls --filter registry=docker.io

You should see output similar to this, showing only repositories from the docker.io registry:

REPOSITORY                                  STATUS
docker.io/library/alpine                    enabled
docker.io/library/ubuntu                    enabled

This command allows you to easily view repositories organized by their registry.

Summary

In this lab, you learned how to use the docker scout repo ls command to list Docker Scout repositories. You started by listing all configured repositories to see their names and status (enabled or disabled).

You then explored how to filter the repository list using the --filter name=<pattern> flag to find repositories matching a specific name or pattern. Finally, you learned how to list only enabled repositories and repositories from a specific registry, allowing you to manage and view your Docker Scout repositories effectively.