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Build Notes

Original rticle found here https://www.docker.com/blog/getting-started-with-docker-for-arm-on-linux/

Load/Install qemu

This loads the qemu image from ARM on x86 systems. Probably should get the latest image from here https://hub.docker.com/r/docker/binfmt/tags?page=1&ordering=last_updated

$ docker run --rm --privileged docker/binfmt:a7996909642ee92942dcd6cff44b9b95f08dad64

Check to see that qemu is enabled

$ cat /proc/sys/fs/binfmt_misc/qemu-aarch64
enabled
interpreter /usr/bin/qemu-aarch64
flags: OCF
offset 0
magic 7f454c460201010000000000000000000200b7

Create the Builder

I called it armbuilder but thats not really accurate since it can build on many architectures

$ docker buildx create --name armbuilder
$ docker buildx use armbuilder
$ docker buildx inspect --bootstrap
Name:   armbuilder
Driver: docker-container

Nodes:
Name:      armbuilder0
Endpoint:  unix:///var/run/docker.sock
Status:    running
Platforms: linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6

Go ahead and build (this is slow)

$ docker buildx build --platform linux/arm,linux/arm64 -t brabidou/docker-dante-pi:latest . --push