As ARM-based processors become more common, it is increasingly important to be able to build multi-architecture docker images to support x86 and ARM development systems and deployment targets.

In this video, I walk through how docker supports multi-architecture images and demonstrate how to use the buidx command to build a sample application and deploy onto x86 and ARM AWS servers.

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Timestamps:
00:00 - Introduction
00:18 - Processor architecture overview
00:42 - The rise of ARM
01:26 - Who cares?
02:03 - Multi-architecture docker manifests
02:56 - Combining individual manifests (the old method)
03:35 - BuildX
03:54 - Build farm
04:06 - Using QEMU to emulate multiple architectures
04:38 - Demo setup
04:50 - Demo source code
05:40 - Buildx setup
06:46 - Dockerhub repo setup
06:59 - Building the images!
07:47 - Running the container
08:36 - Deploying to AWS (m5 & a1)
09:17 - Potential gotchas
10:05 - Final thoughts

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DevOps Directive

A practical walkthrough on building multi-architecture Docker images using Docker BuildX and QEMU emulation. Covers why ARM support is increasingly important (Apple Silicon, AWS Graviton), how multi-architecture manifests work, and step-by-step instructions for creating and pushing images that run on both x86 and ARM. Also discusses cost savings from deploying on ARM-based AWS instances (up to 20% cost reduction, 40% performance gains) and limitations like missing base images or dependencies for certain architectures.

How to Build Multi-Architecture Docker Images with BuildX | Deploy containers to x86 and ARM!