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Cross-platform emulator collection distributed with Docker images.

Build local binaries

docker buildx bake

This builds the qemu-user emulator binaries for your local plaform to the bin directory.

Build test image

REPO=myuser/binfmt docker buildx bake --load mainline
docker run --privileged --rm myuser/binfmt

Prints similar to:

  "supported": [
  "emulators": [

Installing emulators

docker run --privileged --rm tonistiigi/binfmt --install all
docker run --privileged --rm tonistiigi/binfmt --install arm64,riscv64,arm

Uninstalling emulators

docker run --privileged --rm tonistiigi/binfmt --uninstall qemu-aarch64

Emulator names can be found from the status output.

You can also uninstall all archs for a specific emulator:

docker run --privileged --rm tonistiigi/binfmt --uninstall qemu-*

Display version

docker run --privileged --rm tonistiigi/binfmt --version
binfmt/9a44d27 qemu/v6.0.0 go/1.15.11

Development commands

# validate linter

# validate vendored files

# update vendored files

# test, only run on nodes where you allow emulators to be installed in kernel

Test current emulation support

docker run --rm arm64v8/alpine uname -a
docker run --rm arm32v7/alpine uname -a
docker run --rm ppc64le/alpine uname -a
docker run --rm s390x/alpine uname -a
docker run --rm tonistiigi/debian:riscv uname -a

buildkit target

This repository also provides helper for BuildKit's automatic emulation support moby/buildkit#1528. These binaries are BuildKit specific and should not be installed in kernel with binfmt_misc.


MIT. See LICENSE for more details. For QEMU see