# No Fuss Computing - Docker Buildx with QEMU
  [](https://gitlab.com/nofusscomputing/projects/docker-buildx-qemu/-/issues)
  
This project is hosted on [gitlab](https://gitlab.com/nofusscomputing/projects/docker-buildx-qemu) and has a read-only copy hosted on [Github](https://github.com/NofussComputing/docker-buildx-qemu).
----
**Stable Branch**
 
----
**Development Branch**
 
----
links:
- [Issues](https://gitlab.com/nofusscomputing/projects/docker-buildx-qemu/-/issues)
- [Merge Requests (Pull Requests)](https://gitlab.com/nofusscomputing/projects/docker-buildx-qemu/-/merge_requests)
> This is a fork of https://gitlab.com/gdunstone/docker-buildx-qemu, which appears to be a fork of a fork. anyhow, updates are required. Credit to original and derivitive devs/contributors for getting it to the stage they had!!
## Contributing
All contributions for this project must conducted from [Gitlab](https://gitlab.com/nofusscomputing/projects/docker-buildx-qemu).
For further details on contributing please refer to the [contribution guide](CONTRIBUTING.md).
## Other
This repo is release under this [license](LICENSE)
Original README.md
# docker-buildx-qemu
> this is a fork of https://gitlab.com/ericvh/docker-buildx-qemu
> it has been modified to not depend on a gitlab-ci template repository.
This Debian-based image allows you to easily build cross-platform images.
It's been tested with GitLab CI on gitlab.com, but it should work anywhere that docker-in-docker already works, and with a binfmt_misc enabled kernel.
## Example Usage
This GitLab example should give you an idea of how to use the image.
Dockerfile
```dockerfile
FROM alpine
RUN echo "Hello, my CPU architecture is $(uname -m)"
```
.gitlab-ci.yml
```yaml
variables:
CI_BUILD_ARCHS: "linux/arm/v7,linux/arm64,linux/amd64"
CI_BUILD_IMAGE: "registry.gitlab.com/ericvh/docker-buildx-qemu"
build:
image: $CI_BUILD_IMAGE
stage: build
services:
- name: docker:dind
entrypoint: ["env", "-u", "DOCKER_HOST"]
command: ["dockerd-entrypoint.sh"]
variables:
DOCKER_HOST: tcp://docker:2375/
DOCKER_DRIVER: overlay2
# See https://github.com/docker-library/docker/pull/166
DOCKER_TLS_CERTDIR: ""
retry: 2
before_script:
- docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
# Use docker-container driver to allow useful features (push/multi-platform)
- update-binfmts --enable # Important: Ensures execution of other binary formats is enabled in the kernel
- docker buildx create --driver docker-container --use
- docker buildx inspect --bootstrap
script:
- docker buildx ls
- docker buildx build --platform $CI_BUILD_ARCHS --progress plain --pull -t "$CI_REGISTRY_IMAGE" --push .
```
And the (partial) output:
```
#6 [linux/amd64 2/2] RUN echo "Hello, my CPU architecture is $(uname -m)"
#6 0.120 Hello, my CPU architecture is x86_64
#6 DONE 0.3s
#8 [linux/arm/v7 2/2] RUN echo "Hello, my CPU architecture is $(uname -m)"
#8 0.233 Hello, my CPU architecture is armv7l
#8 DONE 0.2s
```