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Pull Docker Image.md

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Problem Statement

The Nautilus project developers are preparing to test a new project in a containerized environment. They need to work with specific Docker images and have requested the following task to be completed:

  • Pull the busybox:musl Docker image on App Server 1 in the Stratos Datacenter.
  • Re-tag this image with a new tag, busybox:blog.

Solution

1. Pull the Docker Image

First, pull the busybox:musl image from Docker Hub. This image is based on the BusyBox distribution and uses the musl libc.

docker pull busybox:musl

This command retrieves the busybox:musl image and downloads it to your local Docker repository on App Server 1.

2. Tag the Pulled Image

Next, create a new tag for the pulled image by tagging it as busybox:blog. This allows you to refer to the same image using a different tag.

docker tag busybox:musl busybox:blog

This command assigns the tag busybox:blog to the image that was previously tagged as busybox:musl. The image ID remains the same, but you can now reference it using the new tag.

3. Verify the Tagging

To confirm that the image has been successfully tagged, list all Docker images and check the output.

docker images

Expected output:

REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
busybox      blog      615b080b9dbe   13 months ago   1.45MB
busybox      musl      615b080b9dbe   13 months ago   1.45MB

In this output:

  • The busybox:blog tag is now associated with the same image ID as busybox:musl.
  • Both tags (busybox:blog and busybox:musl) refer to the same underlying image.