Mastering Docker Image Tagging for Efficient Deployment

Introduction

In this lab, you will step into the futuristic world of a high-altitude city, where you are an aerial mechanical engineer responsible for managing the deployment of various software containers for the city's infrastructure. Your task is to tag Docker images effectively to ensure efficient deployment and management of the city's software systems.

Tag an Image

In this step, you will learn how to tag a Docker image to provide a custom name and tag. First, ensure you have the Docker version 20.10.21 installed in your Linux environment.

Tag the "hello-world" image with a custom tag:

   docker pull hello-world
   docker tag hello-world myhello:latest

Verify the tagged image:

   docker images

Tag an Image with a Registry Address

In this step, you will tag a Docker image with a registry address for future deployment to a specific repository.

Tag the "nginx" image with a registry address:

   docker pull nginx
   docker tag nginx myregistry.com/mynginx:latest

Verify the tagged image:

   docker images

Tag an Image with a Different Name

In this step, you will tag an existing image with a different name and tag for experimentation and version control.

Tag the "alpine" image with a different name and tag:

   docker pull alpine
   docker tag alpine myalpine:v1.0

Verify the tagged image:

   docker images

Summary

In this lab, you have learned the essential skill of tagging Docker images for efficient management and deployment. By practicing the steps provided, you have gained hands-on experience in custom naming, using registry addresses, and version control for Docker images. These skills are crucial for maintaining a well-organized and scalable container infrastructure.