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Working with Docker Content Trust

Software signing is an important aspect of security. It is imperative to verify any software you run on your system has not been tampered with, and Docker images are no exception. Docker Content Trust enables you to sign and verify images before downloading or running them on your system. In this lab, you will have the opportunity to work with Docker Content Trust (DCT) by signing a previously unsigned image and running it on a system that has DCT enabled.

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 30m
Last updated
Clock icon Apr 06, 2025

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Table of Contents

  1. Challenge

    Generate a Trust Key and Add Yourself as a Signer to the New Repository

    1. Generate a trust key.
    2. Create a new passphrase for your key when prompted.
    3. Add yourself as a signer to the ip-10-0-1-102:443/content-dca-tea repository.
    4. Create passphrases for the new root key and new repository key when prompted.

  2. Challenge

    Create a New Tag for the Image, Sign It, and Push It to the Registry

    1. Create a new tag for the image.
    2. Sign the image and push it to the registry.
    3. Enter the passphrase you created earlier for the trust key.
    4. Verify that you can run the signed image.
    5. If you want to test the image further, you can query the tea list web service. (You should see generated JSON data that contains a list of the various kinds of tea.)
Pluralsight Skills - Labs - Pluralsight
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Pluralsight Skills

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Provided environment for hands-on practice

We will provide the credentials and environment necessary for you to practice right within your browser.

Guided walkthrough

Follow along with the author’s guided walkthrough and build something new in your provided environment!

Did you know?

On average, you retain 75% more of your learning if you get time for practice.
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