Committing a New Container Image

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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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Lab Info

Level

Beginner

Last updated

Sep 12, 2025

Duration

15m

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.
Challenge

Commit the Modified Container

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

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