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Committing a New Container Image

In this hands-on lab scenario, you will be connecting to and modifying a Docker container. In addition, you will save the container changes to a new image and start a new container from the newly created image. Upon completion of this lab, you will know how to make small modifications to an existing container and save those changes as an image for future use.

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Path Info

Level
Clock icon Beginner
Duration
Clock icon 15m
Last updated
Clock icon Sep 02, 2025

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Table of Contents

  1. Challenge

    Modify a Container

    • Verify the container web-1 is running.
    • Connect to the container.
    • Add the message "A guru was here in this container" to the file /usr/share/nginx/html/index.html.

  2. Challenge

    Commit the Modified Container

    Commit the changes to the container web-1 to a new image named server-1:5000/my-web:v1.

  3. Challenge

    Verify the Container Changes

    • Start a new container named web-2 using the image server-1:5000/my-web:v1. Map container port 80 to host port 8080.
    • Using curl and a web browser, verify your changes are present on web-2.
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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