Create Docker Image From Container

Task Requirements :

One of the company's developers was working to test new changes on a container. He wants to keep a backup of his changes to the container. A new request has been raised for the DevOps team to create a new image from this container. Below are more details about it.

• Create an image blog:xfusion on Application Server 1 from a container ubuntu_latest that is running on the same server.

Execution :

To create a new Docker image from a running container, you can follow these steps.

• SSH into Application Server 1

  ssh your_username@application_server_1_ip

• Commit Changes to a New Image

  docker commit ubuntu_latest blog:xfusion

  

This command creates a new image named blog:xfusion based on the changes made in the ubuntu_latest container.

• Verify the New Image

  docker images

  

(Optional) Save the Image to a File

• If you need to transfer the image to another server, you can save it to a tarball and then copy it to the desired location

  docker save -o blog_xfusion.tar blog:xfusion

You can then use scp or any other file transfer method to move the blog_xfusion.tar file to the target server.

(Optional) Load Image on Another Server

• If you've saved the image to a tarball and transferred it to another server, you can load it on that server.

  docker load -i blog_xfusion.tar

Now, you have a Docker image named blog:xfusion based on the changes made in the ubuntu_latest container on Application Server 1. You can use this image to spin up containers with the desired configuration.