Support for aarch64

[leonrinkel]

Examples such as A00-simple-peering fail on aarch64 machines, with misleading errors claiming missing Docker credentials. This is due to missing aarch64 variants for the hosted images handsonsecurity/seedemu-base and handsonsecurity/seedemu-router. I was able to get it running by locally building and tagging images from the docker_images folder beforehand (e.g. docker build -t handsonsecurity/seedemu-base .). I think it would be great if you could provide aarch64 images as well and/or include a notice on building images in README.md. Thanks.

[kevin-w-du]

Thanks, this is a good suggestion. In addition to building images for different architecture, we will also think about adding this into our design, i.e., when building the emulator, we can allow users to specify the target platform. Our code will then add the corresponding platform option to the docker-compose file.

[kevin-w-du]

Are you running this on Raspberry Pi? We plan to get one with the aarch64 architecture, so we can build the container image and conduct testing.

[leonrinkel]

I'm using an Apple silicon Mac, but I'm sure a Raspberry Pi would work as well.

[kevin-w-du]

Somebody else suggested that running export DOCKER_DEFAULT_PLATFORM=linux/x86_64 would solve the problem for Mac (m1/m2) machines. I don't have such a machine, so don't have a way to verify that. Can you try this and see whether this solves your problem? If so, the solution will be much easier.

[leonrinkel]

export DOCKER_DEFAULT_PLATFORM=linux/x86_64 did indeed work. Docker then uses Rosetta 2 translation to execute the x86_64 image. I was even able to use this in an aarch64 Ubuntu VM.

[kevin-w-du]

Good to know, and thanks for your help. I have decided to buy an Mac Mini M2 machine, so we can do testing on this platform. We would like to support both Intel/AMD and ARM platforms.

[kevin-w-du]

We will keep this issue open, until we completely resolve it.