How to use docker scout repo enable command to enable Docker Scout on repositories

Introduction

In this lab, you will learn how to enable Docker Scout for your container image repositories. Docker Scout provides valuable security insights into your images, helping you identify vulnerabilities and supply chain risks.

You will explore different methods for enabling Docker Scout, including enabling it for a specific repository, for all repositories within an organization, for repositories matching a filter, and for a repository from a specific registry. These hands-on exercises will demonstrate the flexibility and power of the docker scout repo enable command.

Skills Graph

Enable Docker Scout for a specific repository

In this step, you will learn how to enable Docker Scout for a specific repository. Docker Scout helps you understand the security posture of your container images. By enabling Docker Scout for a repository, you can get insights into vulnerabilities, supply chain risks, and other security issues.

First, let's check if you have Docker installed and running. You can do this by running the following command:

docker version

You should see output showing the Docker version information. If you see an error, it means Docker is not installed or not running. The LabEx environment already has Docker installed, so this command should work.

Now, let's pull a sample image that we will use for this step. We will use the hello-world image from Docker Hub.

docker pull hello-world

This command downloads the hello-world image to your local machine. You should see output indicating the download progress and completion.

To enable Docker Scout for a specific repository, you can use the docker scout repo enable command. The basic syntax is:

docker scout repo enable <repository>

Replace <repository> with the name of the repository you want to enable Docker Scout for. In this case, we will enable it for the hello-world image.

docker scout repo enable docker.io/library/hello-world

After running this command, you should see output confirming that Docker Scout has been enabled for the specified repository. This command registers the repository with Docker Scout, allowing it to analyze the image for security vulnerabilities and other issues.

Enable Docker Scout for all repositories in an organization

In this step, you will learn how to enable Docker Scout for all repositories within a specific organization. This is useful when you want to gain security insights for all your images managed under a single organization in a registry like Docker Hub.

To enable Docker Scout for all repositories in an organization, you can use the docker scout repo enable command with the --org flag. The basic syntax is:

docker scout repo enable --org <organization>

Replace <organization> with the name of the organization you want to enable Docker Scout for.

Note: For this lab environment, we will use a placeholder organization name as we don't have a real Docker Hub organization configured. In a real-world scenario, you would replace your-organization-name with your actual Docker Hub organization name.

Let's use my-docker-org as our placeholder organization name for demonstration purposes.

docker scout repo enable --org my-docker-org

After running this command, you should see output indicating that Docker Scout has been enabled for all repositories within the specified organization. This action tells Docker Scout to monitor and analyze all images pushed to repositories under that organization.

To verify that the organization has been added for monitoring, you can list the enabled repositories and organizations using the docker scout repo ls command.

docker scout repo ls

You should see my-docker-org listed in the output, indicating that Docker Scout is now configured to monitor repositories within this organization.

Enable Docker Scout for repositories matching a filter

In this step, you will learn how to enable Docker Scout for repositories that match a specific filter. This allows you to selectively enable monitoring for a subset of your repositories based on patterns in their names.

To enable Docker Scout for repositories matching a filter, you can use the docker scout repo enable command with the --filter flag. The basic syntax is:

docker scout repo enable --filter <filter>

Replace <filter> with the pattern you want to match. The filter can use wildcards (*) to match multiple characters.

For this example, let's imagine we have several repositories in our placeholder organization my-docker-org that start with web-. We want to enable Docker Scout for all of them.

docker scout repo enable --org my-docker-org --filter "web-*"

This command will enable Docker Scout for any repository within the my-docker-org organization whose name starts with web-.

To see the repositories and filters that Docker Scout is monitoring, you can use the docker scout repo ls command.

docker scout repo ls

You should now see the filter my-docker-org/web-* listed in the output, in addition to the organization my-docker-org that we enabled in the previous step. This indicates that Docker Scout is configured to monitor repositories matching this pattern within the specified organization.

Enable Docker Scout for a repository from a specific registry

In this step, you will learn how to enable Docker Scout for a repository located in a specific container registry other than Docker Hub. This is important when you are using private registries or other public registries.

To enable Docker Scout for a repository from a specific registry, you need to include the registry name in the repository path. The basic syntax is:

docker scout repo enable <registry>/<repository>

Replace <registry> with the address of the container registry and <repository> with the name of the repository within that registry.

For this example, let's imagine we have a repository named my-app in a hypothetical registry located at myregistry.example.com.

First, let's pull a sample image from a different registry to simulate this scenario. We will use the alpine image from registry.hub.docker.com (which is the same as docker.io, but we'll use the full name to demonstrate specifying a registry).

docker pull registry.hub.docker.com/library/alpine

This command pulls the alpine image from the specified registry.

Now, let's enable Docker Scout for this image, explicitly specifying the registry.

docker scout repo enable registry.hub.docker.com/library/alpine

After running this command, you should see output confirming that Docker Scout has been enabled for the specified repository in the given registry.

To verify that the repository from the specific registry has been added for monitoring, you can list the enabled repositories and organizations using the docker scout repo ls command.

docker scout repo ls

You should see registry.hub.docker.com/library/alpine listed in the output, indicating that Docker Scout is now configured to monitor this repository from the specified registry.

Summary

In this lab, you learned how to use the docker scout repo enable command to enable Docker Scout for your repositories. You started by enabling Docker Scout for a specific repository, using the docker scout repo enable <repository> syntax and demonstrating this with the hello-world image. This process registers the repository with Docker Scout for security analysis.

You also explored how to extend this capability to multiple repositories, covering scenarios like enabling Docker Scout for all repositories within an organization, for repositories matching a specific filter, and for repositories residing in a particular registry. These methods allow for efficient management of security scanning across various repository configurations.