Docker
Multi-arch image
Quick answer
A multi-arch image is a manifest list pointing at several per-architecture images, so a single tag works on both amd64 and arm64.
A multi-arch image is a manifest list pointing at several per-architecture images, so a single tag works on both amd64 and arm64.
Why it matters
Building each architecture natively and merging the digests is 5–40× faster than emulating one on the other with QEMU.
Your next build could be twice as fast, at half the price
Start free. Migrating away is the same one line, and we publish that diff too.
Related
Base imageA base image is the image named in a Dockerfile's FROM instruction, providing the filesystem and tooling every subsequent layer builds on.BuildKitBuildKit is Docker's build engine, providing parallel layer execution, better caching and support for build secrets and multi-platform output.BuildxBuildx is the Docker CLI plugin that exposes BuildKit features, including multi-platform builds, remote builders and advanced cache backends.Cache mountA cache mount is a BuildKit feature that persists a directory across builds without including it in the resulting image layer.