Docker Push Image to Repository

Introduction

In this lab, we will explore the scenario of the Dragon Kingdom, where the Dragon King is looking to push Docker images to the repository. The Dragon Kingdom is a mystical land where dragons rule and magic thrives. The Dragon King, ruler of the kingdom, seeks to store and manage the kingdom’s magical artifacts and spells in a secure and organized manner within the repository. The goal is to enable the citizens of the kingdom to easily access and utilize the stored images for various enchanting purposes.

Skills Graph

Authenticate with Container Registry

In this step, we will guide the Dragon King through the process of authenticating with the container registry to enable image pushing. The Dragon King needs to securely authenticate his identity with the registry using Docker.

If you don't have a Docker Hub account, visit the Docker Hub website and sign up for a free account.

Example Code

In this step, we will guide the Dragon King to execute the following commands in the /home/labex/project directory for login to Docker Hub.

docker login

If you have a private registry, then you can use docker login <registry-server-address> to log into your registry server.

docker login <registry-server-address>

Tag Docker Image

The next step involves tagging a Docker image to prepare it for pushing to the container registry.

Example Code

The Dragon King should execute the following commands to tag the alpine Docker image.

docker tag alpine < your-docker-hub-username > / < tag-name-for-image > :latest

In this step, you must tag the alpine image with magical-alpine:latest.

docker tag alpine < your-docker-hub-username > /magical-alpine:latest

If you have a private registry, then you can use docker tag <image-name> <registry-server-address>/<tag-name>:<version> to tag the image for push to your registry server, such as:

docker tag enchanted-spells registry.dragonkingdom.com/enchanted-spells:latest

Push Image to Repository

In this step, the Dragon King will push the tagged Docker image to the container registry.

Example Code

The Dragon King should execute the following command to push the Docker image to the container registry.

docker push < your-docker-hub-username > /magical-alpine:latest

If you have a private registry, then you can use docker push <registry-server-address>/<tag-name>:<version> to push to your registry server, such as:

docker push registry.dragonkingdom.com/enchanted-spells:latest

Summary

In this lab, we focused on enabling the Dragon King to push a Docker image to the repository within the mystical Dragon Kingdom. By guiding the Dragon King through the steps of authentication, tagging, and pushing the image, we have empowered him to securely store and manage the kingdom’s magical artifacts and spells. This experience has provided us with valuable insight into the pivotal role Docker plays in efficiently managing containerized applications and images.

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