Publishing Container Images to GitHub Container Registry

Do you have a container image that you want to share with the world? GitHub Container Registry (GHCR) is a great place to store and share your container images. In this tutorial, we’ll show you how to publish container images to GHCR using GitHub Actions.

Start by creating a new repository on GitHub or cloning an existing one. Then make sure you have a Dockerfile in the root of your repository.

Pushing Multi-Architecture Container Images

Introduction

My previous article, Building Multi-Architecture Container Images, covered the basics of building multi-architecture container images using Docker Buildx. In this article, we’ll explore how to push multi-architecture container images to Azure Container Registry (ACR) using GitHub Actions.

What is a GitHub Action?

GitHub Actions is a continuous integration and continuous deployment (CI/CD) platform built into GitHub. It allows you to automate, customize, and execute your software development workflows. Using GitHub Actions, you can create workflows that respond to GitHub events, such as push, issue creation, or a new release.

Building Multi-Architecture Container Images

Introduction

Over the past several years, we’ve seen the emergence of the ARM64 architecture, which is gaining popularity due to its energy efficiency and performance benefits. We often seen these processors in mobile devices, such as smartphones and tablets. We also seen them in our IoT devices, such as smartwatches and smart TVs. Now, we are starting to see increased adoption of ARM64 processors in servers and personal computers.

This emergence of the ARM64 architecture, means that we now have two major processor architectures to consider when building and deploying our containerized applications in order to maximize our application’s reach.